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GitHub - geekvest/chi: lightweight, idiomatic and composable router for building Go HTTP services
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data-view-component="true" class="octicon octicon-mark-github"> <path d="M12.5.75C6.146.75 1 5.896 1 12.25c0 5.089 3.292 9.387 7.863 10.91.575.101.79-.244.79-.546 0-.273-.014-1.178-.014-2.142-2.889.532-3.636-.704-3.866-1.35-.13-.331-.69-1.352-1.18-1.625-.402-.216-.977-.748-.014-.762.906-.014 1.553.834 1.769 1.179 1.035 1.74 2.688 1.25 3.349.948.1-.747.402-1.25.733-1.538-2.559-.287-5.232-1.279-5.232-5.678 0-1.25.445-2.285 1.178-3.09-.115-.288-.517-1.467.115-3.048 0 0 .963-.302 3.163 1.179.92-.259 1.897-.388 2.875-.388.977 0 1.955.13 2.875.388 2.2-1.495 3.162-1.179 3.162-1.179.633 1.581.23 2.76.115 3.048.733.805 1.179 1.825 1.179 3.09 0 4.413-2.688 5.39-5.247 5.678.417.36.776 1.05.776 2.128 0 1.538-.014 2.774-.014 3.162 0 .302.216.662.79.547C20.709 21.637 24 17.324 24 12.25 24 5.896 18.854.75 12.5.75Z"></path> </svg> </a> <div class="flex-1 flex-order-2 text-right"> <a href="/login?return_to=https%3A%2F%2Fgithub.com%2Fgeekvest%2Fchi" class="HeaderMenu-link HeaderMenu-button d-inline-flex 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flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Product <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4 d-lg-flex flex-wrap dropdown-menu-wide"> <div class="HeaderMenu-column px-lg-4 border-lg-right mb-4 mb-lg-0 pr-lg-7"> <div class="border-bottom pb-3 pb-lg-0 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.368-.014.733-.052 1.086.23.462.477 1.088.644 1.517 1.258.364 2.233 1.721 2.605 2.656a.832.832 0 0 1 .053.22v2.869a.641.641 0 0 1-.078.256ZM12.172 11h-.344a4.323 4.323 0 0 1-.355.508C10.703 12.455 9.555 13 7.965 13c-1.725 0-2.989-.359-3.782-1.259a2.005 2.005 0 0 1-.085-.104L4 11.741v6.585c1.435.779 4.514 2.179 8 2.179 3.486 0 6.565-1.4 8-2.179v-6.585l-.098-.104s-.033.045-.085.104c-.793.9-2.057 1.259-3.782 1.259-1.59 0-2.738-.545-3.508-1.492a4.323 4.323 0 0 1-.355-.508h-.016.016Zm.641-2.935c.136 1.057.403 1.913.878 2.497.442.544 1.134.938 2.344.938 1.573 0 2.292-.337 2.657-.751.384-.435.558-1.15.558-2.361 0-1.14-.243-1.847-.705-2.319-.477-.488-1.319-.862-2.824-1.025-1.487-.161-2.192.138-2.533.529-.269.307-.437.808-.438 1.578v.021c0 .265.021.562.063.893Zm-1.626 0c.042-.331.063-.628.063-.894v-.02c-.001-.77-.169-1.271-.438-1.578-.341-.391-1.046-.69-2.533-.529-1.505.163-2.347.537-2.824 1.025-.462.472-.705 1.179-.705 2.319 0 1.211.175 1.926.558 2.361.365.414 1.084.751 2.657.751 1.21 0 1.902-.394 2.344-.938.475-.584.742-1.44.878-2.497Z"></path><path d="M14.5 14.25a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Zm-5 0a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Z"></path> </svg> <div> <div class="color-fg-default h4">GitHub Copilot</div> Write better code with AI </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"security","context":"product","tag":"link","label":"security_link_product_navbar"}" href="https://github.com/features/security"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-shield-check color-fg-subtle mr-3"> <path d="M16.53 9.78a.75.75 0 0 0-1.06-1.06L11 13.19l-1.97-1.97a.75.75 0 0 0-1.06 1.06l2.5 2.5a.75.75 0 0 0 1.06 0l5-5Z"></path><path d="m12.54.637 8.25 2.675A1.75 1.75 0 0 1 22 4.976V10c0 6.19-3.771 10.704-9.401 12.83a1.704 1.704 0 0 1-1.198 0C5.77 20.705 2 16.19 2 10V4.976c0-.758.489-1.43 1.21-1.664L11.46.637a1.748 1.748 0 0 1 1.08 0Zm-.617 1.426-8.25 2.676a.249.249 0 0 0-.173.237V10c0 5.46 3.28 9.483 8.43 11.426a.199.199 0 0 0 .14 0C17.22 19.483 20.5 15.461 20.5 10V4.976a.25.25 0 0 0-.173-.237l-8.25-2.676a.253.253 0 0 0-.154 0Z"></path> </svg> <div> <div class="color-fg-default h4">Security</div> Find and fix vulnerabilities </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"actions","context":"product","tag":"link","label":"actions_link_product_navbar"}" href="https://github.com/features/actions"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-workflow color-fg-subtle mr-3"> <path d="M1 3a2 2 0 0 1 2-2h6.5a2 2 0 0 1 2 2v6.5a2 2 0 0 1-2 2H7v4.063C7 16.355 7.644 17 8.438 17H12.5v-2.5a2 2 0 0 1 2-2H21a2 2 0 0 1 2 2V21a2 2 0 0 1-2 2h-6.5a2 2 0 0 1-2-2v-2.5H8.437A2.939 2.939 0 0 1 5.5 15.562V11.5H3a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v6.5a.5.5 0 0 0 .5.5h6.5a.5.5 0 0 0 .5-.5V3a.5.5 0 0 0-.5-.5ZM14.5 14a.5.5 0 0 0-.5.5V21a.5.5 0 0 0 .5.5H21a.5.5 0 0 0 .5-.5v-6.5a.5.5 0 0 0-.5-.5Z"></path> </svg> <div> <div class="color-fg-default h4">Actions</div> Automate any workflow </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"codespaces","context":"product","tag":"link","label":"codespaces_link_product_navbar"}" href="https://github.com/features/codespaces"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-codespaces color-fg-subtle mr-3"> <path d="M3.5 3.75C3.5 2.784 4.284 2 5.25 2h13.5c.966 0 1.75.784 1.75 1.75v7.5A1.75 1.75 0 0 1 18.75 13H5.25a1.75 1.75 0 0 1-1.75-1.75Zm-2 12c0-.966.784-1.75 1.75-1.75h17.5c.966 0 1.75.784 1.75 1.75v4a1.75 1.75 0 0 1-1.75 1.75H3.25a1.75 1.75 0 0 1-1.75-1.75ZM5.25 3.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h13.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Zm-2 12a.25.25 0 0 0-.25.25v4c0 .138.112.25.25.25h17.5a.25.25 0 0 0 .25-.25v-4a.25.25 0 0 0-.25-.25Z"></path><path d="M10 17.75a.75.75 0 0 1 .75-.75h6.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1-.75-.75Zm-4 0a.75.75 0 0 1 .75-.75h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1-.75-.75Z"></path> </svg> <div> <div class="color-fg-default h4">Codespaces</div> Instant dev environments </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"issues","context":"product","tag":"link","label":"issues_link_product_navbar"}" href="https://github.com/features/issues"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-issue-opened color-fg-subtle mr-3"> <path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1ZM2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12Zm9.5 2a2 2 0 1 1-.001-3.999A2 2 0 0 1 12 14Z"></path> </svg> <div> <div class="color-fg-default h4">Issues</div> Plan and track work </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"code_review","context":"product","tag":"link","label":"code_review_link_product_navbar"}" href="https://github.com/features/code-review"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-code-review color-fg-subtle mr-3"> <path d="M10.3 6.74a.75.75 0 0 1-.04 1.06l-2.908 2.7 2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M1.5 4.25c0-.966.784-1.75 1.75-1.75h17.5c.966 0 1.75.784 1.75 1.75v12.5a1.75 1.75 0 0 1-1.75 1.75h-9.69l-3.573 3.573A1.458 1.458 0 0 1 5 21.043V18.5H3.25a1.75 1.75 0 0 1-1.75-1.75ZM3.25 4a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h2.5a.75.75 0 0 1 .75.75v3.19l3.72-3.72a.749.749 0 0 1 .53-.22h10a.25.25 0 0 0 .25-.25V4.25a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Review</div> Manage code changes </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"discussions","context":"product","tag":"link","label":"discussions_link_product_navbar"}" href="https://github.com/features/discussions"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-comment-discussion color-fg-subtle mr-3"> <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 14.25 14H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 15.543V14H1.75A1.75 1.75 0 0 1 0 12.25v-9.5C0 1.784.784 1 1.75 1ZM1.5 2.75v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Z"></path><path d="M22.5 8.75a.25.25 0 0 0-.25-.25h-3.5a.75.75 0 0 1 0-1.5h3.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 22.25 20H21v1.543a1.457 1.457 0 0 1-2.487 1.03L15.939 20H10.75A1.75 1.75 0 0 1 9 18.25v-1.465a.75.75 0 0 1 1.5 0v1.465c0 .138.112.25.25.25h5.5a.75.75 0 0 1 .53.22l2.72 2.72v-2.19a.75.75 0 0 1 .75-.75h2a.25.25 0 0 0 .25-.25v-9.5Z"></path> </svg> <div> <div class="color-fg-default h4">Discussions</div> Collaborate outside of code </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{"location":"navbar","action":"code_search","context":"product","tag":"link","label":"code_search_link_product_navbar"}" href="https://github.com/features/code-search"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-code-square color-fg-subtle mr-3"> <path d="M10.3 8.24a.75.75 0 0 1-.04 1.06L7.352 12l2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M2 3.75C2 2.784 2.784 2 3.75 2h16.5c.966 0 1.75.784 1.75 1.75v16.5A1.75 1.75 0 0 1 20.25 22H3.75A1.75 1.75 0 0 1 2 20.25Zm1.75-.25a.25.25 0 0 0-.25.25v16.5c0 .138.112.25.25.25h16.5a.25.25 0 0 0 .25-.25V3.75a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Search</div> Find more, search less </div> </a></li> </ul> </div> </div> <div class="HeaderMenu-column px-lg-4"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0 border-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="product-explore-heading">Explore</span> <ul class="list-style-none f5" aria-labelledby="product-explore-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"all_features","context":"product","tag":"link","label":"all_features_link_product_navbar"}" href="https://github.com/features"> 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2.093.584.235 1.077.546 1.474.952.85.869 1.132 2.037 1.132 3.368 0 .368-.014.733-.052 1.086.23.462.477 1.088.644 1.517 1.258.364 2.233 1.721 2.605 2.656a.832.832 0 0 1 .053.22v2.869a.641.641 0 0 1-.078.256ZM12.172 11h-.344a4.323 4.323 0 0 1-.355.508C10.703 12.455 9.555 13 7.965 13c-1.725 0-2.989-.359-3.782-1.259a2.005 2.005 0 0 1-.085-.104L4 11.741v6.585c1.435.779 4.514 2.179 8 2.179 3.486 0 6.565-1.4 8-2.179v-6.585l-.098-.104s-.033.045-.085.104c-.793.9-2.057 1.259-3.782 1.259-1.59 0-2.738-.545-3.508-1.492a4.323 4.323 0 0 1-.355-.508h-.016.016Zm.641-2.935c.136 1.057.403 1.913.878 2.497.442.544 1.134.938 2.344.938 1.573 0 2.292-.337 2.657-.751.384-.435.558-1.15.558-2.361 0-1.14-.243-1.847-.705-2.319-.477-.488-1.319-.862-2.824-1.025-1.487-.161-2.192.138-2.533.529-.269.307-.437.808-.438 1.578v.021c0 .265.021.562.063.893Zm-1.626 0c.042-.331.063-.628.063-.894v-.02c-.001-.77-.169-1.271-.438-1.578-.341-.391-1.046-.69-2.533-.529-1.505.163-2.347.537-2.824 1.025-.462.472-.705 1.179-.705 2.319 0 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6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg></button> </div> </div> </div> <scrollable-region data-labelled-by="custom-scopes-dialog-title"> <div data-view-component="true" class="Overlay-body"> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <div hidden class="create-custom-scope-form" data-target="custom-scopes.createCustomScopeForm"> <!-- '"` --><!-- </textarea></xmp> --></option></form><form id="custom-scopes-dialog-form" data-turbo="false" action="/search/custom_scopes" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token" value="BOMH9kaLNyxl+AW1tN+7NELSBVZg9YW5rEt6Is0r5HWVNwNr3ZSOegbyP9TiJmeKF9f1WFxep7CZYdb02HO21Q==" /> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <input type="hidden" 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rel=\"noopener noreferrer nofollow\" href=\"https://camo.githubusercontent.com/500622bf4d425a2daf1733022fd10433e19689476c41aab806bd858733a1fa9b/68747470733a2f2f63646e2e7261776769742e636f6d2f676f2d6368692f6368692f6d61737465722f5f6578616d706c65732f6368692e737667\"\u003e\u003cimg alt=\"chi\" src=\"https://camo.githubusercontent.com/500622bf4d425a2daf1733022fd10433e19689476c41aab806bd858733a1fa9b/68747470733a2f2f63646e2e7261776769742e636f6d2f676f2d6368692f6368692f6d61737465722f5f6578616d706c65732f6368692e737667\" width=\"220\" data-canonical-src=\"https://cdn.rawgit.com/go-chi/chi/master/_examples/chi.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/h1\u003e\u003ca id=\"\" class=\"anchor\" aria-label=\"Permalink: \" href=\"#\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/v5\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/282a09fac927e9b41f51f4da4b9dca691a9a8bb81687c7d4b80b8e1e2290ee23/68747470733a2f2f676f646f632e6f72672f6769746875622e636f6d2f676f2d6368692f6368693f7374617475732e737667\" alt=\"GoDoc Widget\" data-canonical-src=\"https://godoc.org/github.com/go-chi/chi?status.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003echi\u003c/code\u003e is a lightweight, idiomatic and composable router for building Go HTTP services. It's\nespecially good at helping you write large REST API services that are kept maintainable as your\nproject grows and changes. \u003ccode\u003echi\u003c/code\u003e is built on the new \u003ccode\u003econtext\u003c/code\u003e package introduced in Go 1.7 to\nhandle signaling, cancelation and request-scoped values across a handler chain.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe focus of the project has been to seek out an elegant and comfortable design for writing\nREST API servers, written during the development of the Pressly API service that powers our\npublic API service, which in turn powers all of our client-side applications.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe key considerations of chi's design are: project structure, maintainability, standard http\nhandlers (stdlib-only), developer productivity, and deconstructing a large system into many small\nparts. The core router \u003ccode\u003egithub.com/go-chi/chi\u003c/code\u003e is quite small (less than 1000 LOC), but we've also\nincluded some useful/optional subpackages: \u003ca href=\"/geekvest/chi/blob/master/middleware\"\u003emiddleware\u003c/a\u003e, \u003ca href=\"https://github.com/go-chi/render\"\u003erender\u003c/a\u003e\nand \u003ca href=\"https://github.com/go-chi/docgen\"\u003edocgen\u003c/a\u003e. We hope you enjoy it too!\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eInstall\u003c/h2\u003e\u003ca id=\"user-content-install\" class=\"anchor\" aria-label=\"Permalink: Install\" href=\"#install\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ego get -u github.com/go-chi/chi/v5\u003c/code\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFeatures\u003c/h2\u003e\u003ca id=\"user-content-features\" class=\"anchor\" aria-label=\"Permalink: Features\" href=\"#features\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003cstrong\u003eLightweight\u003c/strong\u003e - cloc'd in ~1000 LOC for the chi router\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eFast\u003c/strong\u003e - yes, see \u003ca href=\"#benchmarks\"\u003ebenchmarks\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003e100% compatible with net/http\u003c/strong\u003e - use any http or middleware pkg in the ecosystem that is also compatible with \u003ccode\u003enet/http\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eDesigned for modular/composable APIs\u003c/strong\u003e - middlewares, inline middlewares, route groups and sub-router mounting\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eContext control\u003c/strong\u003e - built on new \u003ccode\u003econtext\u003c/code\u003e package, providing value chaining, cancellations and timeouts\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eRobust\u003c/strong\u003e - in production at Pressly, Cloudflare, Heroku, 99Designs, and many others (see \u003ca href=\"https://github.com/go-chi/chi/issues/91\" data-hovercard-type=\"issue\" data-hovercard-url=\"/go-chi/chi/issues/91/hovercard\"\u003ediscussion\u003c/a\u003e)\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eDoc generation\u003c/strong\u003e - \u003ccode\u003edocgen\u003c/code\u003e auto-generates routing documentation from your source to JSON or Markdown\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eGo.mod support\u003c/strong\u003e - as of v5, go.mod support (see \u003ca href=\"https://github.com/go-chi/chi/blob/master/CHANGELOG.md\"\u003eCHANGELOG\u003c/a\u003e)\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo external dependencies\u003c/strong\u003e - plain ol' Go stdlib + net/http\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eExamples\u003c/h2\u003e\u003ca id=\"user-content-examples\" class=\"anchor\" aria-label=\"Permalink: Examples\" href=\"#examples\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSee \u003ca href=\"https://github.com/go-chi/chi/blob/master/_examples/\"\u003e_examples/\u003c/a\u003e for a variety of examples.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eAs easy as:\u003c/strong\u003e\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-go notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"package main\n\nimport (\n\t\u0026quot;net/http\u0026quot;\n\n\t\u0026quot;github.com/go-chi/chi/v5\u0026quot;\n\t\u0026quot;github.com/go-chi/chi/v5/middleware\u0026quot;\n)\n\nfunc main() {\n\tr := chi.NewRouter()\n\tr.Use(middleware.Logger)\n\tr.Get(\u0026quot;/\u0026quot;, func(w http.ResponseWriter, r *http.Request) {\n\t\tw.Write([]byte(\u0026quot;welcome\u0026quot;))\n\t})\n\thttp.ListenAndServe(\u0026quot;:3000\u0026quot;, r)\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003epackage\u003c/span\u003e main\n\n\u003cspan class=\"pl-k\"\u003eimport\u003c/span\u003e (\n\t\u003cspan class=\"pl-s\"\u003e\"net/http\"\u003c/span\u003e\n\n\t\u003cspan class=\"pl-s\"\u003e\"github.com/go-chi/chi/v5\"\u003c/span\u003e\n\t\u003cspan class=\"pl-s\"\u003e\"github.com/go-chi/chi/v5/middleware\"\u003c/span\u003e\n)\n\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003emain\u003c/span\u003e() {\n\t\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003echi\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eNewRouter\u003c/span\u003e()\n\t\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddleware\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eLogger\u003c/span\u003e)\n\t\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n\t\t\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWrite\u003c/span\u003e([]\u003cspan class=\"pl-smi\"\u003ebyte\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"welcome\"\u003c/span\u003e))\n\t})\n\t\u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eListenAndServe\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\":3000\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e)\n}\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eREST Preview:\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eHere is a little preview of how routing looks like with chi. Also take a look at the generated routing docs\nin JSON (\u003ca href=\"https://github.com/go-chi/chi/blob/master/_examples/rest/routes.json\"\u003eroutes.json\u003c/a\u003e) and in\nMarkdown (\u003ca href=\"https://github.com/go-chi/chi/blob/master/_examples/rest/routes.md\"\u003eroutes.md\u003c/a\u003e).\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eI highly recommend reading the source of the \u003ca href=\"https://github.com/go-chi/chi/blob/master/_examples/\"\u003eexamples\u003c/a\u003e listed\nabove, they will show you all the features of chi and serve as a good form of documentation.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-go notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"import (\n //...\n \u0026quot;context\u0026quot;\n \u0026quot;github.com/go-chi/chi/v5\u0026quot;\n \u0026quot;github.com/go-chi/chi/v5/middleware\u0026quot;\n)\n\nfunc main() {\n r := chi.NewRouter()\n\n // A good base middleware stack\n r.Use(middleware.RequestID)\n r.Use(middleware.RealIP)\n r.Use(middleware.Logger)\n r.Use(middleware.Recoverer)\n\n // Set a timeout value on the request context (ctx), that will signal\n // through ctx.Done() that the request has timed out and further\n // processing should be stopped.\n r.Use(middleware.Timeout(60 * time.Second))\n\n r.Get(\u0026quot;/\u0026quot;, func(w http.ResponseWriter, r *http.Request) {\n w.Write([]byte(\u0026quot;hi\u0026quot;))\n })\n\n // RESTy routes for \u0026quot;articles\u0026quot; resource\n r.Route(\u0026quot;/articles\u0026quot;, func(r chi.Router) {\n r.With(paginate).Get(\u0026quot;/\u0026quot;, listArticles) // GET /articles\n r.With(paginate).Get(\u0026quot;/{month}-{day}-{year}\u0026quot;, listArticlesByDate) // GET /articles/01-16-2017\n\n r.Post(\u0026quot;/\u0026quot;, createArticle) // POST /articles\n r.Get(\u0026quot;/search\u0026quot;, searchArticles) // GET /articles/search\n\n // Regexp url parameters:\n r.Get(\u0026quot;/{articleSlug:[a-z-]+}\u0026quot;, getArticleBySlug) // GET /articles/home-is-toronto\n\n // Subrouters:\n r.Route(\u0026quot;/{articleID}\u0026quot;, func(r chi.Router) {\n r.Use(ArticleCtx)\n r.Get(\u0026quot;/\u0026quot;, getArticle) // GET /articles/123\n r.Put(\u0026quot;/\u0026quot;, updateArticle) // PUT /articles/123\n r.Delete(\u0026quot;/\u0026quot;, deleteArticle) // DELETE /articles/123\n })\n })\n\n // Mount the admin sub-router\n r.Mount(\u0026quot;/admin\u0026quot;, adminRouter())\n\n http.ListenAndServe(\u0026quot;:3333\u0026quot;, r)\n}\n\nfunc ArticleCtx(next http.Handler) http.Handler {\n return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {\n articleID := chi.URLParam(r, \u0026quot;articleID\u0026quot;)\n article, err := dbGetArticle(articleID)\n if err != nil {\n http.Error(w, http.StatusText(404), 404)\n return\n }\n ctx := context.WithValue(r.Context(), \u0026quot;article\u0026quot;, article)\n next.ServeHTTP(w, r.WithContext(ctx))\n })\n}\n\nfunc getArticle(w http.ResponseWriter, r *http.Request) {\n ctx := r.Context()\n article, ok := ctx.Value(\u0026quot;article\u0026quot;).(*Article)\n if !ok {\n http.Error(w, http.StatusText(422), 422)\n return\n }\n w.Write([]byte(fmt.Sprintf(\u0026quot;title:%s\u0026quot;, article.Title)))\n}\n\n// A completely separate router for administrator routes\nfunc adminRouter() http.Handler {\n r := chi.NewRouter()\n r.Use(AdminOnly)\n r.Get(\u0026quot;/\u0026quot;, adminIndex)\n r.Get(\u0026quot;/accounts\u0026quot;, adminListAccounts)\n return r\n}\n\nfunc AdminOnly(next http.Handler) http.Handler {\n return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {\n ctx := r.Context()\n perm, ok := ctx.Value(\u0026quot;acl.permission\u0026quot;).(YourPermissionType)\n if !ok || !perm.IsAdmin() {\n http.Error(w, http.StatusText(403), 403)\n return\n }\n next.ServeHTTP(w, r)\n })\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003eimport\u003c/span\u003e (\n \u003cspan class=\"pl-c\"\u003e//...\u003c/span\u003e\n \u003cspan class=\"pl-s\"\u003e\"context\"\u003c/span\u003e\n \u003cspan class=\"pl-s\"\u003e\"github.com/go-chi/chi/v5\"\u003c/span\u003e\n \u003cspan class=\"pl-s\"\u003e\"github.com/go-chi/chi/v5/middleware\"\u003c/span\u003e\n)\n\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003emain\u003c/span\u003e() {\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003echi\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eNewRouter\u003c/span\u003e()\n\n \u003cspan class=\"pl-c\"\u003e// A good base middleware stack\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddleware\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eRequestID\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddleware\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eRealIP\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddleware\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eLogger\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddleware\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eRecoverer\u003c/span\u003e)\n\n \u003cspan class=\"pl-c\"\u003e// Set a timeout value on the request context (ctx), that will signal\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// through ctx.Done() that the request has timed out and further\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// processing should be stopped.\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddleware\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eTimeout\u003c/span\u003e(\u003cspan class=\"pl-c1\"\u003e60\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003etime\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eSecond\u003c/span\u003e))\n\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWrite\u003c/span\u003e([]\u003cspan class=\"pl-smi\"\u003ebyte\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"hi\"\u003c/span\u003e))\n })\n\n \u003cspan class=\"pl-c\"\u003e// RESTy routes for \"articles\" resource\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eRoute\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/articles\"\u003c/span\u003e, \u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e chi.\u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e) {\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWith\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epaginate\u003c/span\u003e).\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003elistArticles\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// GET /articles\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWith\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epaginate\u003c/span\u003e).\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/{month}-{day}-{year}\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003elistArticlesByDate\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// GET /articles/01-16-2017\u003c/span\u003e\n\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003ePost\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003ecreateArticle\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// POST /articles\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/search\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003esearchArticles\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// GET /articles/search\u003c/span\u003e\n\n \u003cspan class=\"pl-c\"\u003e// Regexp url parameters:\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/{articleSlug:[a-z-]+}\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003egetArticleBySlug\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// GET /articles/home-is-toronto\u003c/span\u003e\n\n \u003cspan class=\"pl-c\"\u003e// Subrouters:\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eRoute\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/{articleID}\"\u003c/span\u003e, \u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e chi.\u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e) {\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eArticleCtx\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003egetArticle\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// GET /articles/123\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003ePut\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eupdateArticle\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// PUT /articles/123\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eDelete\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003edeleteArticle\u003c/span\u003e) \u003cspan class=\"pl-c\"\u003e// DELETE /articles/123\u003c/span\u003e\n })\n })\n\n \u003cspan class=\"pl-c\"\u003e// Mount the admin sub-router\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eMount\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/admin\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eadminRouter\u003c/span\u003e())\n\n \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eListenAndServe\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\":3333\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e)\n}\n\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eArticleCtx\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003enext\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e) http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e {\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eHandlerFunc\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-s1\"\u003earticleID\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003echi\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eURLParam\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\"articleID\"\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003earticle\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eerr\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003edbGetArticle\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003earticleID\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003eif\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eerr\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e!=\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003enil\u003c/span\u003e {\n \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eError\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eStatusText\u003c/span\u003e(\u003cspan class=\"pl-c1\"\u003e404\u003c/span\u003e), \u003cspan class=\"pl-c1\"\u003e404\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e\n }\n \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003econtext\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWithValue\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eContext\u003c/span\u003e(), \u003cspan class=\"pl-s\"\u003e\"article\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003earticle\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003enext\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eServeHTTP\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWithContext\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e))\n })\n}\n\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003egetArticle\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eContext\u003c/span\u003e()\n \u003cspan class=\"pl-s1\"\u003earticle\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eok\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eValue\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"article\"\u003c/span\u003e).(\u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003e\u003cspan class=\"pl-smi\"\u003eArticle\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003eif\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e!\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eok\u003c/span\u003e {\n \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eError\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eStatusText\u003c/span\u003e(\u003cspan class=\"pl-c1\"\u003e422\u003c/span\u003e), \u003cspan class=\"pl-c1\"\u003e422\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e\n }\n \u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWrite\u003c/span\u003e([]\u003cspan class=\"pl-smi\"\u003ebyte\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003efmt\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eSprintf\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"title:%s\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003earticle\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eTitle\u003c/span\u003e)))\n}\n\n\u003cspan class=\"pl-c\"\u003e// A completely separate router for administrator routes\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eadminRouter\u003c/span\u003e() http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e {\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003echi\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eNewRouter\u003c/span\u003e()\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eAdminOnly\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eadminIndex\u003c/span\u003e)\n \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"/accounts\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eadminListAccounts\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e\n}\n\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eAdminOnly\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003enext\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e) http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e {\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eHandlerFunc\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eContext\u003c/span\u003e()\n \u003cspan class=\"pl-s1\"\u003eperm\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eok\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eValue\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"acl.permission\"\u003c/span\u003e).(\u003cspan class=\"pl-smi\"\u003eYourPermissionType\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003eif\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e!\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eok\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e||\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e!\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eperm\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eIsAdmin\u003c/span\u003e() {\n \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eError\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eStatusText\u003c/span\u003e(\u003cspan class=\"pl-c1\"\u003e403\u003c/span\u003e), \u003cspan class=\"pl-c1\"\u003e403\u003c/span\u003e)\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e\n }\n \u003cspan class=\"pl-s1\"\u003enext\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eServeHTTP\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e)\n })\n}\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRouter interface\u003c/h2\u003e\u003ca id=\"user-content-router-interface\" class=\"anchor\" aria-label=\"Permalink: Router interface\" href=\"#router-interface\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003echi's router is based on a kind of \u003ca href=\"https://en.wikipedia.org/wiki/Radix_tree\" rel=\"nofollow\"\u003ePatricia Radix trie\u003c/a\u003e.\nThe router is fully compatible with \u003ccode\u003enet/http\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eBuilt on top of the tree is the \u003ccode\u003eRouter\u003c/code\u003e interface:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-go notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// Router consisting of the core routing methods used by chi's Mux,\n// using only the standard net/http.\ntype Router interface {\n\thttp.Handler\n\tRoutes\n\n\t// Use appends one or more middlewares onto the Router stack.\n\tUse(middlewares ...func(http.Handler) http.Handler)\n\n\t// With adds inline middlewares for an endpoint handler.\n\tWith(middlewares ...func(http.Handler) http.Handler) Router\n\n\t// Group adds a new inline-Router along the current routing\n\t// path, with a fresh middleware stack for the inline-Router.\n\tGroup(fn func(r Router)) Router\n\n\t// Route mounts a sub-Router along a `pattern`` string.\n\tRoute(pattern string, fn func(r Router)) Router\n\n\t// Mount attaches another http.Handler along ./pattern/*\n\tMount(pattern string, h http.Handler)\n\n\t// Handle and HandleFunc adds routes for `pattern` that matches\n\t// all HTTP methods.\n\tHandle(pattern string, h http.Handler)\n\tHandleFunc(pattern string, h http.HandlerFunc)\n\n\t// Method and MethodFunc adds routes for `pattern` that matches\n\t// the `method` HTTP method.\n\tMethod(method, pattern string, h http.Handler)\n\tMethodFunc(method, pattern string, h http.HandlerFunc)\n\n\t// HTTP-method routing along `pattern`\n\tConnect(pattern string, h http.HandlerFunc)\n\tDelete(pattern string, h http.HandlerFunc)\n\tGet(pattern string, h http.HandlerFunc)\n\tHead(pattern string, h http.HandlerFunc)\n\tOptions(pattern string, h http.HandlerFunc)\n\tPatch(pattern string, h http.HandlerFunc)\n\tPost(pattern string, h http.HandlerFunc)\n\tPut(pattern string, h http.HandlerFunc)\n\tTrace(pattern string, h http.HandlerFunc)\n\n\t// NotFound defines a handler to respond whenever a route could\n\t// not be found.\n\tNotFound(h http.HandlerFunc)\n\n\t// MethodNotAllowed defines a handler to respond whenever a method is\n\t// not allowed.\n\tMethodNotAllowed(h http.HandlerFunc)\n}\n\n// Routes interface adds two methods for router traversal, which is also\n// used by the github.com/go-chi/docgen package to generate documentation for Routers.\ntype Routes interface {\n\t// Routes returns the routing tree in an easily traversable structure.\n\tRoutes() []Route\n\n\t// Middlewares returns the list of middlewares in use by the router.\n\tMiddlewares() Middlewares\n\n\t// Match searches the routing tree for a handler that matches\n\t// the method/path - similar to routing a http request, but without\n\t// executing the handler thereafter.\n\tMatch(rctx *Context, method, path string) bool\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e// Router consisting of the core routing methods used by chi's Mux,\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// using only the standard net/http.\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003etype\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e \u003cspan class=\"pl-k\"\u003einterface\u003c/span\u003e {\n\thttp.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e\n\t\u003cspan class=\"pl-smi\"\u003eRoutes\u003c/span\u003e\n\n\t\u003cspan class=\"pl-c\"\u003e// Use appends one or more middlewares onto the Router stack.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eUse\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddlewares\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e...\u003c/span\u003e\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e) http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e)\n\n\t\u003cspan class=\"pl-c\"\u003e// With adds inline middlewares for an endpoint handler.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eWith\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emiddlewares\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e...\u003c/span\u003e\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e) http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e) \u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e\n\n\t\u003cspan class=\"pl-c\"\u003e// Group adds a new inline-Router along the current routing\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// path, with a fresh middleware stack for the inline-Router.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eGroup\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003efn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e)) \u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e\n\n\t\u003cspan class=\"pl-c\"\u003e// Route mounts a sub-Router along a `pattern`` string.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eRoute\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003efn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e)) \u003cspan class=\"pl-smi\"\u003eRouter\u003c/span\u003e\n\n\t\u003cspan class=\"pl-c\"\u003e// Mount attaches another http.Handler along ./pattern/*\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eMount\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e)\n\n\t\u003cspan class=\"pl-c\"\u003e// Handle and HandleFunc adds routes for `pattern` that matches\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// all HTTP methods.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eHandle\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eHandleFunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\n\t\u003cspan class=\"pl-c\"\u003e// Method and MethodFunc adds routes for `pattern` that matches\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// the `method` HTTP method.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eMethod\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emethod\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eMethodFunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003emethod\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\n\t\u003cspan class=\"pl-c\"\u003e// HTTP-method routing along `pattern`\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eConnect\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eDelete\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eGet\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eHead\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eOptions\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003ePatch\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003ePost\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003ePut\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\t\u003cspan class=\"pl-c1\"\u003eTrace\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003epattern\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\n\t\u003cspan class=\"pl-c\"\u003e// NotFound defines a handler to respond whenever a route could\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// not be found.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eNotFound\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n\n\t\u003cspan class=\"pl-c\"\u003e// MethodNotAllowed defines a handler to respond whenever a method is\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// not allowed.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eMethodNotAllowed\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eh\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandlerFunc\u003c/span\u003e)\n}\n\n\u003cspan class=\"pl-c\"\u003e// Routes interface adds two methods for router traversal, which is also\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// used by the github.com/go-chi/docgen package to generate documentation for Routers.\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003etype\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003eRoutes\u003c/span\u003e \u003cspan class=\"pl-k\"\u003einterface\u003c/span\u003e {\n\t\u003cspan class=\"pl-c\"\u003e// Routes returns the routing tree in an easily traversable structure.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eRoutes\u003c/span\u003e() []\u003cspan class=\"pl-smi\"\u003eRoute\u003c/span\u003e\n\n\t\u003cspan class=\"pl-c\"\u003e// Middlewares returns the list of middlewares in use by the router.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eMiddlewares\u003c/span\u003e() \u003cspan class=\"pl-smi\"\u003eMiddlewares\u003c/span\u003e\n\n\t\u003cspan class=\"pl-c\"\u003e// Match searches the routing tree for a handler that matches\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// the method/path - similar to routing a http request, but without\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// executing the handler thereafter.\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eMatch\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003erctx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003e\u003cspan class=\"pl-smi\"\u003eContext\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003emethod\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003epath\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e) \u003cspan class=\"pl-smi\"\u003ebool\u003c/span\u003e\n}\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eEach routing method accepts a URL \u003ccode\u003epattern\u003c/code\u003e and chain of \u003ccode\u003ehandlers\u003c/code\u003e. The URL pattern\nsupports named params (ie. \u003ccode\u003e/users/{userID}\u003c/code\u003e) and wildcards (ie. \u003ccode\u003e/admin/*\u003c/code\u003e). URL parameters\ncan be fetched at runtime by calling \u003ccode\u003echi.URLParam(r, \"userID\")\u003c/code\u003e for named parameters\nand \u003ccode\u003echi.URLParam(r, \"*\")\u003c/code\u003e for a wildcard parameter.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMiddleware handlers\u003c/h3\u003e\u003ca id=\"user-content-middleware-handlers\" class=\"anchor\" aria-label=\"Permalink: Middleware handlers\" href=\"#middleware-handlers\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003echi's middlewares are just stdlib net/http middleware handlers. There is nothing special\nabout them, which means the router and all the tooling is designed to be compatible and\nfriendly with any middleware in the community. This offers much better extensibility and reuse\nof packages and is at the heart of chi's purpose.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eHere is an example of a standard net/http middleware where we assign a context key \u003ccode\u003e\"user\"\u003c/code\u003e\nthe value of \u003ccode\u003e\"123\"\u003c/code\u003e. This middleware sets a hypothetical user identifier on the request\ncontext and calls the next handler in the chain.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-go notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// HTTP middleware setting a value on the request context\nfunc MyMiddleware(next http.Handler) http.Handler {\n return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {\n // create new context from `r` request context, and assign key `\u0026quot;user\u0026quot;`\n // to value of `\u0026quot;123\u0026quot;`\n ctx := context.WithValue(r.Context(), \u0026quot;user\u0026quot;, \u0026quot;123\u0026quot;)\n\n // call the next handler in the chain, passing the response writer and\n // the updated request object with the new context value.\n //\n // note: context.Context values are nested, so any previously set\n // values will be accessible as well, and the new `\u0026quot;user\u0026quot;` key\n // will be accessible from this point forward.\n next.ServeHTTP(w, r.WithContext(ctx))\n })\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e// HTTP middleware setting a value on the request context\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eMyMiddleware\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003enext\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e) http.\u003cspan class=\"pl-smi\"\u003eHandler\u003c/span\u003e {\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ehttp\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eHandlerFunc\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-c\"\u003e// create new context from `r` request context, and assign key `\"user\"`\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// to value of `\"123\"`\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003econtext\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWithValue\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eContext\u003c/span\u003e(), \u003cspan class=\"pl-s\"\u003e\"user\"\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\"123\"\u003c/span\u003e)\n\n \u003cspan class=\"pl-c\"\u003e// call the next handler in the chain, passing the response writer and\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// the updated request object with the new context value.\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// note: context.Context values are nested, so any previously set\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// values will be accessible as well, and the new `\"user\"` key\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// will be accessible from this point forward.\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003enext\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eServeHTTP\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWithContext\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e))\n })\n}\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRequest handlers\u003c/h3\u003e\u003ca id=\"user-content-request-handlers\" class=\"anchor\" aria-label=\"Permalink: Request handlers\" href=\"#request-handlers\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003echi uses standard net/http request handlers. This little snippet is an example of a http.Handler\nfunc that reads a user identifier from the request context - hypothetically, identifying\nthe user sending an authenticated request, validated+set by a previous middleware handler.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-go notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// HTTP handler accessing data from the request context.\nfunc MyRequestHandler(w http.ResponseWriter, r *http.Request) {\n // here we read from the request context and fetch out `\u0026quot;user\u0026quot;` key set in\n // the MyMiddleware example above.\n user := r.Context().Value(\u0026quot;user\u0026quot;).(string)\n\n // respond to the client\n w.Write([]byte(fmt.Sprintf(\u0026quot;hi %s\u0026quot;, user)))\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e// HTTP handler accessing data from the request context.\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eMyRequestHandler\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-c\"\u003e// here we read from the request context and fetch out `\"user\"` key set in\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// the MyMiddleware example above.\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003euser\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eContext\u003c/span\u003e().\u003cspan class=\"pl-c1\"\u003eValue\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"user\"\u003c/span\u003e).(\u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e)\n\n \u003cspan class=\"pl-c\"\u003e// respond to the client\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWrite\u003c/span\u003e([]\u003cspan class=\"pl-smi\"\u003ebyte\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003efmt\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eSprintf\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"hi %s\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003euser\u003c/span\u003e)))\n}\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eURL parameters\u003c/h3\u003e\u003ca id=\"user-content-url-parameters\" class=\"anchor\" aria-label=\"Permalink: URL parameters\" href=\"#url-parameters\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003echi's router parses and stores URL parameters right onto the request context. Here is\nan example of how to access URL params in your net/http handlers. And of course, middlewares\nare able to access the same information.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-go notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// HTTP handler accessing the url routing parameters.\nfunc MyRequestHandler(w http.ResponseWriter, r *http.Request) {\n // fetch the url parameter `\u0026quot;userID\u0026quot;` from the request of a matching\n // routing pattern. An example routing pattern could be: /users/{userID}\n userID := chi.URLParam(r, \u0026quot;userID\u0026quot;)\n\n // fetch `\u0026quot;key\u0026quot;` from the request context\n ctx := r.Context()\n key := ctx.Value(\u0026quot;key\u0026quot;).(string)\n\n // respond to the client\n w.Write([]byte(fmt.Sprintf(\u0026quot;hi %v, %v\u0026quot;, userID, key)))\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e// HTTP handler accessing the url routing parameters.\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003efunc\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eMyRequestHandler\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e http.\u003cspan class=\"pl-smi\"\u003eResponseWriter\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e*\u003c/span\u003ehttp.\u003cspan class=\"pl-smi\"\u003eRequest\u003c/span\u003e) {\n \u003cspan class=\"pl-c\"\u003e// fetch the url parameter `\"userID\"` from the request of a matching\u003c/span\u003e\n \u003cspan class=\"pl-c\"\u003e// routing pattern. An example routing pattern could be: /users/{userID}\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003euserID\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003echi\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eURLParam\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\"userID\"\u003c/span\u003e)\n\n \u003cspan class=\"pl-c\"\u003e// fetch `\"key\"` from the request context\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003er\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eContext\u003c/span\u003e()\n \u003cspan class=\"pl-s1\"\u003ekey\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e:=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ectx\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eValue\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"key\"\u003c/span\u003e).(\u003cspan class=\"pl-smi\"\u003estring\u003c/span\u003e)\n\n \u003cspan class=\"pl-c\"\u003e// respond to the client\u003c/span\u003e\n \u003cspan class=\"pl-s1\"\u003ew\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eWrite\u003c/span\u003e([]\u003cspan class=\"pl-smi\"\u003ebyte\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003efmt\u003c/span\u003e.\u003cspan class=\"pl-c1\"\u003eSprintf\u003c/span\u003e(\u003cspan class=\"pl-s\"\u003e\"hi %v, %v\"\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003euserID\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003ekey\u003c/span\u003e)))\n}\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMiddlewares\u003c/h2\u003e\u003ca id=\"user-content-middlewares\" class=\"anchor\" aria-label=\"Permalink: Middlewares\" href=\"#middlewares\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003echi comes equipped with an optional \u003ccode\u003emiddleware\u003c/code\u003e package, providing a suite of standard\n\u003ccode\u003enet/http\u003c/code\u003e middlewares. Please note, any middleware in the ecosystem that is also compatible\nwith \u003ccode\u003enet/http\u003c/code\u003e can be used with chi's mux.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCore middlewares\u003c/h3\u003e\u003ca id=\"user-content-core-middlewares\" class=\"anchor\" aria-label=\"Permalink: Core middlewares\" href=\"#core-middlewares\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003chr\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003echi/middleware Handler\u003c/th\u003e\n\u003cth align=\"left\"\u003edescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#AllowContentEncoding\" rel=\"nofollow\"\u003eAllowContentEncoding\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eEnforces a whitelist of request Content-Encoding headers\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#AllowContentType\" rel=\"nofollow\"\u003eAllowContentType\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eExplicit whitelist of accepted request Content-Types\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#BasicAuth\" rel=\"nofollow\"\u003eBasicAuth\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eBasic HTTP authentication\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Compress\" rel=\"nofollow\"\u003eCompress\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eGzip compression for clients that accept compressed responses\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#ContentCharset\" rel=\"nofollow\"\u003eContentCharset\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eEnsure charset for Content-Type request headers\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#CleanPath\" rel=\"nofollow\"\u003eCleanPath\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eClean double slashes from request path\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#GetHead\" rel=\"nofollow\"\u003eGetHead\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eAutomatically route undefined HEAD requests to GET handlers\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Heartbeat\" rel=\"nofollow\"\u003eHeartbeat\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eMonitoring endpoint to check the servers pulse\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Logger\" rel=\"nofollow\"\u003eLogger\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eLogs the start and end of each request with the elapsed processing time\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#NoCache\" rel=\"nofollow\"\u003eNoCache\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eSets response headers to prevent clients from caching\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Profiler\" rel=\"nofollow\"\u003eProfiler\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eEasily attach net/http/pprof to your routers\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#RealIP\" rel=\"nofollow\"\u003eRealIP\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eSets a http.Request's RemoteAddr to either X-Real-IP or X-Forwarded-For\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Recoverer\" rel=\"nofollow\"\u003eRecoverer\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eGracefully absorb panics and prints the stack trace\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#RequestID\" rel=\"nofollow\"\u003eRequestID\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eInjects a request ID into the context of each request\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#RedirectSlashes\" rel=\"nofollow\"\u003eRedirectSlashes\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eRedirect slashes on routing paths\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#RouteHeaders\" rel=\"nofollow\"\u003eRouteHeaders\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eRoute handling for request headers\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#SetHeader\" rel=\"nofollow\"\u003eSetHeader\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eShort-hand middleware to set a response header key/value\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#StripSlashes\" rel=\"nofollow\"\u003eStripSlashes\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eStrip slashes on routing paths\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/v5/middleware#Sunset\" rel=\"nofollow\"\u003eSunset\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eSunset set Deprecation/Sunset header to response\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Throttle\" rel=\"nofollow\"\u003eThrottle\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003ePuts a ceiling on the number of concurrent requests\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#Timeout\" rel=\"nofollow\"\u003eTimeout\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eSignals to the request context when the timeout deadline is reached\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#URLFormat\" rel=\"nofollow\"\u003eURLFormat\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eParse extension from url and put it on request context\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://pkg.go.dev/github.com/go-chi/chi/middleware#WithValue\" rel=\"nofollow\"\u003eWithValue\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eShort-hand middleware to set a key/value on the request context\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003chr\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eExtra middlewares \u0026amp; packages\u003c/h3\u003e\u003ca id=\"user-content-extra-middlewares--packages\" class=\"anchor\" aria-label=\"Permalink: Extra middlewares \u0026amp; packages\" href=\"#extra-middlewares--packages\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ePlease see \u003ca href=\"https://github.com/go-chi\"\u003ehttps://github.com/go-chi\u003c/a\u003e for additional packages.\u003c/p\u003e\n\u003chr\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003epackage\u003c/th\u003e\n\u003cth align=\"left\"\u003edescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/cors\"\u003ecors\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eCross-origin resource sharing (CORS)\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/docgen\"\u003edocgen\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003ePrint chi.Router routes at runtime\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/jwtauth\"\u003ejwtauth\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eJWT authentication\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/hostrouter\"\u003ehostrouter\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eDomain/host based request routing\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/httplog\"\u003ehttplog\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eSmall but powerful structured HTTP request logging\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/httprate\"\u003ehttprate\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eHTTP request rate limiter\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/httptracer\"\u003ehttptracer\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eHTTP request performance tracing library\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/httpvcr\"\u003ehttpvcr\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eWrite deterministic tests for external sources\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"https://github.com/go-chi/stampede\"\u003estampede\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eHTTP request coalescer\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003chr\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003econtext?\u003c/h2\u003e\u003ca id=\"user-content-context\" class=\"anchor\" aria-label=\"Permalink: context?\" href=\"#context\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003econtext\u003c/code\u003e is a tiny pkg that provides simple interface to signal context across call stacks\nand goroutines. It was originally written by \u003ca href=\"https://github.com/Sajmani\"\u003eSameer Ajmani\u003c/a\u003e\nand is available in stdlib since go1.7.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eLearn more at \u003ca href=\"https://blog.golang.org/context\" rel=\"nofollow\"\u003ehttps://blog.golang.org/context\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eand..\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eDocs: \u003ca href=\"https://golang.org/pkg/context\" rel=\"nofollow\"\u003ehttps://golang.org/pkg/context\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eSource: \u003ca href=\"https://github.com/golang/go/tree/master/src/context\"\u003ehttps://github.com/golang/go/tree/master/src/context\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBenchmarks\u003c/h2\u003e\u003ca id=\"user-content-benchmarks\" class=\"anchor\" aria-label=\"Permalink: Benchmarks\" href=\"#benchmarks\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe benchmark suite: \u003ca href=\"https://github.com/pkieltyka/go-http-routing-benchmark\"\u003ehttps://github.com/pkieltyka/go-http-routing-benchmark\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eResults as of Nov 29, 2020 with Go 1.15.5 on Linux AMD 3950x\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"BenchmarkChi_Param \t3075895\t 384 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_Param5 \t2116603\t 566 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_Param20 \t 964117\t 1227 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_ParamWrite \t2863413\t 420 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GithubStatic \t3045488\t 395 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GithubParam \t2204115\t 540 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GithubAll \t 10000\t 113811 ns/op\t 81203 B/op 406 allocs/op\nBenchmarkChi_GPlusStatic \t3337485\t 359 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GPlusParam \t2825853\t 423 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GPlus2Params \t2471697\t 483 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GPlusAll \t 194220\t 5950 ns/op\t 5200 B/op 26 allocs/op\nBenchmarkChi_ParseStatic \t3365324\t 356 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_ParseParam \t2976614\t 404 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_Parse2Params \t2638084\t 439 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_ParseAll \t 109567\t 11295 ns/op\t 10400 B/op 52 allocs/op\nBenchmarkChi_StaticAll \t 16846\t 71308 ns/op\t 62802 B/op 314 allocs/op\"\u003e\u003cpre\u003eBenchmarkChi_Param \t3075895\t 384 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_Param5 \t2116603\t 566 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_Param20 \t 964117\t 1227 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_ParamWrite \t2863413\t 420 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GithubStatic \t3045488\t 395 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GithubParam \t2204115\t 540 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GithubAll \t 10000\t 113811 ns/op\t 81203 B/op 406 allocs/op\nBenchmarkChi_GPlusStatic \t3337485\t 359 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GPlusParam \t2825853\t 423 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GPlus2Params \t2471697\t 483 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_GPlusAll \t 194220\t 5950 ns/op\t 5200 B/op 26 allocs/op\nBenchmarkChi_ParseStatic \t3365324\t 356 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_ParseParam \t2976614\t 404 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_Parse2Params \t2638084\t 439 ns/op\t 400 B/op 2 allocs/op\nBenchmarkChi_ParseAll \t 109567\t 11295 ns/op\t 10400 B/op 52 allocs/op\nBenchmarkChi_StaticAll \t 16846\t 71308 ns/op\t 62802 B/op 314 allocs/op\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eComparison with other routers: \u003ca href=\"https://gist.github.com/pkieltyka/123032f12052520aaccab752bd3e78cc\"\u003ehttps://gist.github.com/pkieltyka/123032f12052520aaccab752bd3e78cc\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eNOTE: the allocs in the benchmark above are from the calls to http.Request's\n\u003ccode\u003eWithContext(context.Context)\u003c/code\u003e method that clones the http.Request, sets the \u003ccode\u003eContext()\u003c/code\u003e\non the duplicated (alloc'd) request and returns it the new request object. This is just\nhow setting context on a request in Go works.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCredits\u003c/h2\u003e\u003ca id=\"user-content-credits\" class=\"anchor\" aria-label=\"Permalink: Credits\" href=\"#credits\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eCarl Jackson for \u003ca href=\"https://github.com/zenazn/goji\"\u003ehttps://github.com/zenazn/goji\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eParts of chi's thinking comes from goji, and chi's middleware package\nsources from goji.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eArmon Dadgar for \u003ca href=\"https://github.com/armon/go-radix\"\u003ehttps://github.com/armon/go-radix\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eContributions: \u003ca href=\"https://github.com/VojtechVitek\"\u003e@VojtechVitek\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eWe'll be more than happy to see \u003ca href=\"/geekvest/chi/blob/master/CONTRIBUTING.md\"\u003eyour contributions\u003c/a\u003e!\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBeyond REST\u003c/h2\u003e\u003ca id=\"user-content-beyond-rest\" class=\"anchor\" aria-label=\"Permalink: Beyond REST\" href=\"#beyond-rest\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003echi is just a http router that lets you decompose request handling into many smaller layers.\nMany companies use chi to write REST services for their public APIs. But, REST is just a convention\nfor managing state via HTTP, and there's a lot of other pieces required to write a complete client-server\nsystem or network of microservices.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eLooking beyond REST, I also recommend some newer works in the field:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/webrpc/webrpc\"\u003ewebrpc\u003c/a\u003e - Web-focused RPC client+server framework with code-gen\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/grpc/grpc-go\"\u003egRPC\u003c/a\u003e - Google's RPC framework via protobufs\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/99designs/gqlgen\"\u003egraphql\u003c/a\u003e - Declarative query language\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://nats.io\" rel=\"nofollow\"\u003eNATS\u003c/a\u003e - lightweight pub-sub\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLicense\u003c/h2\u003e\u003ca id=\"user-content-license\" class=\"anchor\" aria-label=\"Permalink: License\" href=\"#license\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eCopyright (c) 2015-present \u003ca href=\"https://github.com/pkieltyka\"\u003ePeter Kieltyka\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eLicensed under \u003ca href=\"/geekvest/chi/blob/master/LICENSE\"\u003eMIT License\u003c/a\u003e\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"","anchor":"","htmlText":""},{"level":2,"text":"Install","anchor":"install","htmlText":"Install"},{"level":2,"text":"Features","anchor":"features","htmlText":"Features"},{"level":2,"text":"Examples","anchor":"examples","htmlText":"Examples"},{"level":2,"text":"Router interface","anchor":"router-interface","htmlText":"Router interface"},{"level":3,"text":"Middleware handlers","anchor":"middleware-handlers","htmlText":"Middleware handlers"},{"level":3,"text":"Request handlers","anchor":"request-handlers","htmlText":"Request handlers"},{"level":3,"text":"URL parameters","anchor":"url-parameters","htmlText":"URL parameters"},{"level":2,"text":"Middlewares","anchor":"middlewares","htmlText":"Middlewares"},{"level":3,"text":"Core middlewares","anchor":"core-middlewares","htmlText":"Core middlewares"},{"level":3,"text":"Extra middlewares \u0026 packages","anchor":"extra-middlewares--packages","htmlText":"Extra middlewares \u0026amp; packages"},{"level":2,"text":"context?","anchor":"context","htmlText":"context?"},{"level":2,"text":"Benchmarks","anchor":"benchmarks","htmlText":"Benchmarks"},{"level":2,"text":"Credits","anchor":"credits","htmlText":"Credits"},{"level":2,"text":"Beyond REST","anchor":"beyond-rest","htmlText":"Beyond REST"},{"level":2,"text":"License","anchor":"license","htmlText":"License"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fgeekvest%2Fchi"}},{"displayName":"LICENSE","repoName":"chi","refName":"master","path":"LICENSE","preferredFileType":"license","tabName":"License","richText":null,"loaded":false,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":null,"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fgeekvest%2Fchi"}},{"displayName":"SECURITY.md","repoName":"chi","refName":"master","path":"SECURITY.md","preferredFileType":"security","tabName":"Security","richText":null,"loaded":false,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":null,"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fgeekvest%2Fchi"}}],"overviewFilesProcessingTime":0}},"appPayload":{"helpUrl":"https://docs.github.com","findFileWorkerPath":"/assets-cdn/worker/find-file-worker-7d7eb7c71814.js","findInFileWorkerPath":"/assets-cdn/worker/find-in-file-worker-96e76d5fdb2c.js","githubDevUrl":null,"enabled_features":{"copilot_workspace":null,"code_nav_ui_events":false,"overview_shared_code_dropdown_button":false,"react_blob_overlay":false,"accessible_code_button":true,"github_models_repo_tab":false}}}}</script> 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LinkButton-module__code-view-link-button--xvCGA flex-items-center fgColor-default" data-loading="false" data-size="small" data-variant="invisible" aria-describedby=":Raqj8pab:-loading-announcement"><span data-component="buttonContent" data-align="center" class="prc-Button-ButtonContent-HKbr-"><span data-component="leadingVisual" class="prc-Button-Visual-2epfX prc-Button-VisualWrap-Db-eB"><svg aria-hidden="true" focusable="false" class="octicon octicon-history" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" style="display:inline-block;user-select:none;vertical-align:text-bottom;overflow:visible"><path d="m.427 1.927 1.215 1.215a8.002 8.002 0 1 1-1.6 5.685.75.75 0 1 1 1.493-.154 6.5 6.5 0 1 0 1.18-4.458l1.358 1.358A.25.25 0 0 1 3.896 6H.25A.25.25 0 0 1 0 5.75V2.104a.25.25 0 0 1 .427-.177ZM7.75 4a.75.75 0 0 1 .75.75v2.992l2.028.812a.75.75 0 0 1-.557 1.392l-2.5-1A.751.751 0 0 1 7 8.25v-3.5A.75.75 0 0 1 7.75 4Z"></path></svg></span><span data-component="text" 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2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="LICENSE" aria-label="LICENSE, (File)" class="Link--primary" href="/geekvest/chi/blob/master/LICENSE">LICENSE</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" style="display:inline-block;user-select:none;vertical-align:text-bottom;overflow:visible"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="LICENSE" aria-label="LICENSE, (File)" class="Link--primary" href="/geekvest/chi/blob/master/LICENSE">LICENSE</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-8"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" style="display:inline-block;user-select:none;vertical-align:text-bottom;overflow:visible"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="Makefile" aria-label="Makefile, (File)" class="Link--primary" href="/geekvest/chi/blob/master/Makefile">Makefile</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" 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id=":Rr9ab:"><svg aria-hidden="true" focusable="false" class="octicon octicon-list-unordered" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" style="display:inline-block;user-select:none;vertical-align:text-bottom;overflow:visible"><path d="M5.75 2.5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5Zm0 5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5Zm0 5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5ZM2 14a1 1 0 1 1 0-2 1 1 0 0 1 0 2Zm1-6a1 1 0 1 1-2 0 1 1 0 0 1 2 0ZM2 4a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg></button></div><div class="Box-sc-g0xbh4-0 QkQOb js-snippet-clipboard-copy-unpositioned undefined" data-hpc="true"><article class="markdown-body entry-content container-lg" itemprop="text"><div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/500622bf4d425a2daf1733022fd10433e19689476c41aab806bd858733a1fa9b/68747470733a2f2f63646e2e7261776769742e636f6d2f676f2d6368692f6368692f6d61737465722f5f6578616d706c65732f6368692e737667"><img alt="chi" src="https://camo.githubusercontent.com/500622bf4d425a2daf1733022fd10433e19689476c41aab806bd858733a1fa9b/68747470733a2f2f63646e2e7261776769742e636f6d2f676f2d6368692f6368692f6d61737465722f5f6578616d706c65732f6368692e737667" width="220" data-canonical-src="https://cdn.rawgit.com/go-chi/chi/master/_examples/chi.svg" style="max-width: 100%;"></a></h1><a id="" class="anchor" aria-label="Permalink: " href="#"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a href="https://pkg.go.dev/github.com/go-chi/chi/v5" rel="nofollow"><img src="https://camo.githubusercontent.com/282a09fac927e9b41f51f4da4b9dca691a9a8bb81687c7d4b80b8e1e2290ee23/68747470733a2f2f676f646f632e6f72672f6769746875622e636f6d2f676f2d6368692f6368693f7374617475732e737667" alt="GoDoc Widget" data-canonical-src="https://godoc.org/github.com/go-chi/chi?status.svg" style="max-width: 100%;"></a></p> <p dir="auto"><code>chi</code> is a lightweight, idiomatic and composable router for building Go HTTP services. It's especially good at helping you write large REST API services that are kept maintainable as your project grows and changes. <code>chi</code> is built on the new <code>context</code> package introduced in Go 1.7 to handle signaling, cancelation and request-scoped values across a handler chain.</p> <p dir="auto">The focus of the project has been to seek out an elegant and comfortable design for writing REST API servers, written during the development of the Pressly API service that powers our public API service, which in turn powers all of our client-side applications.</p> <p dir="auto">The key considerations of chi's design are: project structure, maintainability, standard http handlers (stdlib-only), developer productivity, and deconstructing a large system into many small parts. The core router <code>github.com/go-chi/chi</code> is quite small (less than 1000 LOC), but we've also included some useful/optional subpackages: <a href="/geekvest/chi/blob/master/middleware">middleware</a>, <a href="https://github.com/go-chi/render">render</a> and <a href="https://github.com/go-chi/docgen">docgen</a>. We hope you enjoy it too!</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Install</h2><a id="user-content-install" class="anchor" aria-label="Permalink: Install" href="#install"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><code>go get -u github.com/go-chi/chi/v5</code></p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Features</h2><a id="user-content-features" class="anchor" aria-label="Permalink: Features" href="#features"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li><strong>Lightweight</strong> - cloc'd in ~1000 LOC for the chi router</li> <li><strong>Fast</strong> - yes, see <a href="#benchmarks">benchmarks</a></li> <li><strong>100% compatible with net/http</strong> - use any http or middleware pkg in the ecosystem that is also compatible with <code>net/http</code></li> <li><strong>Designed for modular/composable APIs</strong> - middlewares, inline middlewares, route groups and sub-router mounting</li> <li><strong>Context control</strong> - built on new <code>context</code> package, providing value chaining, cancellations and timeouts</li> <li><strong>Robust</strong> - in production at Pressly, Cloudflare, Heroku, 99Designs, and many others (see <a href="https://github.com/go-chi/chi/issues/91" data-hovercard-type="issue" data-hovercard-url="/go-chi/chi/issues/91/hovercard">discussion</a>)</li> <li><strong>Doc generation</strong> - <code>docgen</code> auto-generates routing documentation from your source to JSON or Markdown</li> <li><strong>Go.mod support</strong> - as of v5, go.mod support (see <a href="https://github.com/go-chi/chi/blob/master/CHANGELOG.md">CHANGELOG</a>)</li> <li><strong>No external dependencies</strong> - plain ol' Go stdlib + net/http</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Examples</h2><a id="user-content-examples" class="anchor" aria-label="Permalink: Examples" href="#examples"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">See <a href="https://github.com/go-chi/chi/blob/master/_examples/">_examples/</a> for a variety of examples.</p> <p dir="auto"><strong>As easy as:</strong></p> <div class="highlight highlight-source-go notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="package main import ( "net/http" "github.com/go-chi/chi/v5" "github.com/go-chi/chi/v5/middleware" ) func main() { r := chi.NewRouter() r.Use(middleware.Logger) r.Get("/", func(w http.ResponseWriter, r *http.Request) { w.Write([]byte("welcome")) }) http.ListenAndServe(":3000", r) }"><pre><span class="pl-k">package</span> main <span class="pl-k">import</span> ( <span class="pl-s">"net/http"</span> <span class="pl-s">"github.com/go-chi/chi/v5"</span> <span class="pl-s">"github.com/go-chi/chi/v5/middleware"</span> ) <span class="pl-k">func</span> <span class="pl-s1">main</span>() { <span class="pl-s1">r</span> <span class="pl-c1">:=</span> <span class="pl-s1">chi</span>.<span class="pl-c1">NewRouter</span>() <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">middleware</span>.<span class="pl-c1">Logger</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/"</span>, <span class="pl-k">func</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-s1">w</span>.<span class="pl-c1">Write</span>([]<span class="pl-smi">byte</span>(<span class="pl-s">"welcome"</span>)) }) <span class="pl-s1">http</span>.<span class="pl-c1">ListenAndServe</span>(<span class="pl-s">":3000"</span>, <span class="pl-s1">r</span>) }</pre></div> <p dir="auto"><strong>REST Preview:</strong></p> <p dir="auto">Here is a little preview of how routing looks like with chi. Also take a look at the generated routing docs in JSON (<a href="https://github.com/go-chi/chi/blob/master/_examples/rest/routes.json">routes.json</a>) and in Markdown (<a href="https://github.com/go-chi/chi/blob/master/_examples/rest/routes.md">routes.md</a>).</p> <p dir="auto">I highly recommend reading the source of the <a href="https://github.com/go-chi/chi/blob/master/_examples/">examples</a> listed above, they will show you all the features of chi and serve as a good form of documentation.</p> <div class="highlight highlight-source-go notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="import ( //... "context" "github.com/go-chi/chi/v5" "github.com/go-chi/chi/v5/middleware" ) func main() { r := chi.NewRouter() // A good base middleware stack r.Use(middleware.RequestID) r.Use(middleware.RealIP) r.Use(middleware.Logger) r.Use(middleware.Recoverer) // Set a timeout value on the request context (ctx), that will signal // through ctx.Done() that the request has timed out and further // processing should be stopped. r.Use(middleware.Timeout(60 * time.Second)) r.Get("/", func(w http.ResponseWriter, r *http.Request) { w.Write([]byte("hi")) }) // RESTy routes for "articles" resource r.Route("/articles", func(r chi.Router) { r.With(paginate).Get("/", listArticles) // GET /articles r.With(paginate).Get("/{month}-{day}-{year}", listArticlesByDate) // GET /articles/01-16-2017 r.Post("/", createArticle) // POST /articles r.Get("/search", searchArticles) // GET /articles/search // Regexp url parameters: r.Get("/{articleSlug:[a-z-]+}", getArticleBySlug) // GET /articles/home-is-toronto // Subrouters: r.Route("/{articleID}", func(r chi.Router) { r.Use(ArticleCtx) r.Get("/", getArticle) // GET /articles/123 r.Put("/", updateArticle) // PUT /articles/123 r.Delete("/", deleteArticle) // DELETE /articles/123 }) }) // Mount the admin sub-router r.Mount("/admin", adminRouter()) http.ListenAndServe(":3333", r) } func ArticleCtx(next http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { articleID := chi.URLParam(r, "articleID") article, err := dbGetArticle(articleID) if err != nil { http.Error(w, http.StatusText(404), 404) return } ctx := context.WithValue(r.Context(), "article", article) next.ServeHTTP(w, r.WithContext(ctx)) }) } func getArticle(w http.ResponseWriter, r *http.Request) { ctx := r.Context() article, ok := ctx.Value("article").(*Article) if !ok { http.Error(w, http.StatusText(422), 422) return } w.Write([]byte(fmt.Sprintf("title:%s", article.Title))) } // A completely separate router for administrator routes func adminRouter() http.Handler { r := chi.NewRouter() r.Use(AdminOnly) r.Get("/", adminIndex) r.Get("/accounts", adminListAccounts) return r } func AdminOnly(next http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { ctx := r.Context() perm, ok := ctx.Value("acl.permission").(YourPermissionType) if !ok || !perm.IsAdmin() { http.Error(w, http.StatusText(403), 403) return } next.ServeHTTP(w, r) }) }"><pre><span class="pl-k">import</span> ( <span class="pl-c">//...</span> <span class="pl-s">"context"</span> <span class="pl-s">"github.com/go-chi/chi/v5"</span> <span class="pl-s">"github.com/go-chi/chi/v5/middleware"</span> ) <span class="pl-k">func</span> <span class="pl-s1">main</span>() { <span class="pl-s1">r</span> <span class="pl-c1">:=</span> <span class="pl-s1">chi</span>.<span class="pl-c1">NewRouter</span>() <span class="pl-c">// A good base middleware stack</span> <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">middleware</span>.<span class="pl-c1">RequestID</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">middleware</span>.<span class="pl-c1">RealIP</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">middleware</span>.<span class="pl-c1">Logger</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">middleware</span>.<span class="pl-c1">Recoverer</span>) <span class="pl-c">// Set a timeout value on the request context (ctx), that will signal</span> <span class="pl-c">// through ctx.Done() that the request has timed out and further</span> <span class="pl-c">// processing should be stopped.</span> <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">middleware</span>.<span class="pl-c1">Timeout</span>(<span class="pl-c1">60</span> <span class="pl-c1">*</span> <span class="pl-s1">time</span>.<span class="pl-c1">Second</span>)) <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/"</span>, <span class="pl-k">func</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-s1">w</span>.<span class="pl-c1">Write</span>([]<span class="pl-smi">byte</span>(<span class="pl-s">"hi"</span>)) }) <span class="pl-c">// RESTy routes for "articles" resource</span> <span class="pl-s1">r</span>.<span class="pl-c1">Route</span>(<span class="pl-s">"/articles"</span>, <span class="pl-k">func</span>(<span class="pl-s1">r</span> chi.<span class="pl-smi">Router</span>) { <span class="pl-s1">r</span>.<span class="pl-c1">With</span>(<span class="pl-s1">paginate</span>).<span class="pl-c1">Get</span>(<span class="pl-s">"/"</span>, <span class="pl-s1">listArticles</span>) <span class="pl-c">// GET /articles</span> <span class="pl-s1">r</span>.<span class="pl-c1">With</span>(<span class="pl-s1">paginate</span>).<span class="pl-c1">Get</span>(<span class="pl-s">"/{month}-{day}-{year}"</span>, <span class="pl-s1">listArticlesByDate</span>) <span class="pl-c">// GET /articles/01-16-2017</span> <span class="pl-s1">r</span>.<span class="pl-c1">Post</span>(<span class="pl-s">"/"</span>, <span class="pl-s1">createArticle</span>) <span class="pl-c">// POST /articles</span> <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/search"</span>, <span class="pl-s1">searchArticles</span>) <span class="pl-c">// GET /articles/search</span> <span class="pl-c">// Regexp url parameters:</span> <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/{articleSlug:[a-z-]+}"</span>, <span class="pl-s1">getArticleBySlug</span>) <span class="pl-c">// GET /articles/home-is-toronto</span> <span class="pl-c">// Subrouters:</span> <span class="pl-s1">r</span>.<span class="pl-c1">Route</span>(<span class="pl-s">"/{articleID}"</span>, <span class="pl-k">func</span>(<span class="pl-s1">r</span> chi.<span class="pl-smi">Router</span>) { <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">ArticleCtx</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/"</span>, <span class="pl-s1">getArticle</span>) <span class="pl-c">// GET /articles/123</span> <span class="pl-s1">r</span>.<span class="pl-c1">Put</span>(<span class="pl-s">"/"</span>, <span class="pl-s1">updateArticle</span>) <span class="pl-c">// PUT /articles/123</span> <span class="pl-s1">r</span>.<span class="pl-c1">Delete</span>(<span class="pl-s">"/"</span>, <span class="pl-s1">deleteArticle</span>) <span class="pl-c">// DELETE /articles/123</span> }) }) <span class="pl-c">// Mount the admin sub-router</span> <span class="pl-s1">r</span>.<span class="pl-c1">Mount</span>(<span class="pl-s">"/admin"</span>, <span class="pl-s1">adminRouter</span>()) <span class="pl-s1">http</span>.<span class="pl-c1">ListenAndServe</span>(<span class="pl-s">":3333"</span>, <span class="pl-s1">r</span>) } <span class="pl-k">func</span> <span class="pl-s1">ArticleCtx</span>(<span class="pl-s1">next</span> http.<span class="pl-smi">Handler</span>) http.<span class="pl-smi">Handler</span> { <span class="pl-k">return</span> <span class="pl-s1">http</span>.<span class="pl-c1">HandlerFunc</span>(<span class="pl-k">func</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-s1">articleID</span> <span class="pl-c1">:=</span> <span class="pl-s1">chi</span>.<span class="pl-c1">URLParam</span>(<span class="pl-s1">r</span>, <span class="pl-s">"articleID"</span>) <span class="pl-s1">article</span>, <span class="pl-s1">err</span> <span class="pl-c1">:=</span> <span class="pl-s1">dbGetArticle</span>(<span class="pl-s1">articleID</span>) <span class="pl-k">if</span> <span class="pl-s1">err</span> <span class="pl-c1">!=</span> <span class="pl-c1">nil</span> { <span class="pl-s1">http</span>.<span class="pl-c1">Error</span>(<span class="pl-s1">w</span>, <span class="pl-s1">http</span>.<span class="pl-c1">StatusText</span>(<span class="pl-c1">404</span>), <span class="pl-c1">404</span>) <span class="pl-k">return</span> } <span class="pl-s1">ctx</span> <span class="pl-c1">:=</span> <span class="pl-s1">context</span>.<span class="pl-c1">WithValue</span>(<span class="pl-s1">r</span>.<span class="pl-c1">Context</span>(), <span class="pl-s">"article"</span>, <span class="pl-s1">article</span>) <span class="pl-s1">next</span>.<span class="pl-c1">ServeHTTP</span>(<span class="pl-s1">w</span>, <span class="pl-s1">r</span>.<span class="pl-c1">WithContext</span>(<span class="pl-s1">ctx</span>)) }) } <span class="pl-k">func</span> <span class="pl-s1">getArticle</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-s1">ctx</span> <span class="pl-c1">:=</span> <span class="pl-s1">r</span>.<span class="pl-c1">Context</span>() <span class="pl-s1">article</span>, <span class="pl-s1">ok</span> <span class="pl-c1">:=</span> <span class="pl-s1">ctx</span>.<span class="pl-c1">Value</span>(<span class="pl-s">"article"</span>).(<span class="pl-c1">*</span><span class="pl-smi">Article</span>) <span class="pl-k">if</span> <span class="pl-c1">!</span><span class="pl-s1">ok</span> { <span class="pl-s1">http</span>.<span class="pl-c1">Error</span>(<span class="pl-s1">w</span>, <span class="pl-s1">http</span>.<span class="pl-c1">StatusText</span>(<span class="pl-c1">422</span>), <span class="pl-c1">422</span>) <span class="pl-k">return</span> } <span class="pl-s1">w</span>.<span class="pl-c1">Write</span>([]<span class="pl-smi">byte</span>(<span class="pl-s1">fmt</span>.<span class="pl-c1">Sprintf</span>(<span class="pl-s">"title:%s"</span>, <span class="pl-s1">article</span>.<span class="pl-c1">Title</span>))) } <span class="pl-c">// A completely separate router for administrator routes</span> <span class="pl-k">func</span> <span class="pl-s1">adminRouter</span>() http.<span class="pl-smi">Handler</span> { <span class="pl-s1">r</span> <span class="pl-c1">:=</span> <span class="pl-s1">chi</span>.<span class="pl-c1">NewRouter</span>() <span class="pl-s1">r</span>.<span class="pl-c1">Use</span>(<span class="pl-s1">AdminOnly</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/"</span>, <span class="pl-s1">adminIndex</span>) <span class="pl-s1">r</span>.<span class="pl-c1">Get</span>(<span class="pl-s">"/accounts"</span>, <span class="pl-s1">adminListAccounts</span>) <span class="pl-k">return</span> <span class="pl-s1">r</span> } <span class="pl-k">func</span> <span class="pl-s1">AdminOnly</span>(<span class="pl-s1">next</span> http.<span class="pl-smi">Handler</span>) http.<span class="pl-smi">Handler</span> { <span class="pl-k">return</span> <span class="pl-s1">http</span>.<span class="pl-c1">HandlerFunc</span>(<span class="pl-k">func</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-s1">ctx</span> <span class="pl-c1">:=</span> <span class="pl-s1">r</span>.<span class="pl-c1">Context</span>() <span class="pl-s1">perm</span>, <span class="pl-s1">ok</span> <span class="pl-c1">:=</span> <span class="pl-s1">ctx</span>.<span class="pl-c1">Value</span>(<span class="pl-s">"acl.permission"</span>).(<span class="pl-smi">YourPermissionType</span>) <span class="pl-k">if</span> <span class="pl-c1">!</span><span class="pl-s1">ok</span> <span class="pl-c1">||</span> <span class="pl-c1">!</span><span class="pl-s1">perm</span>.<span class="pl-c1">IsAdmin</span>() { <span class="pl-s1">http</span>.<span class="pl-c1">Error</span>(<span class="pl-s1">w</span>, <span class="pl-s1">http</span>.<span class="pl-c1">StatusText</span>(<span class="pl-c1">403</span>), <span class="pl-c1">403</span>) <span class="pl-k">return</span> } <span class="pl-s1">next</span>.<span class="pl-c1">ServeHTTP</span>(<span class="pl-s1">w</span>, <span class="pl-s1">r</span>) }) }</pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Router interface</h2><a id="user-content-router-interface" class="anchor" aria-label="Permalink: Router interface" href="#router-interface"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">chi's router is based on a kind of <a href="https://en.wikipedia.org/wiki/Radix_tree" rel="nofollow">Patricia Radix trie</a>. The router is fully compatible with <code>net/http</code>.</p> <p dir="auto">Built on top of the tree is the <code>Router</code> interface:</p> <div class="highlight highlight-source-go notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// Router consisting of the core routing methods used by chi's Mux, // using only the standard net/http. type Router interface { http.Handler Routes // Use appends one or more middlewares onto the Router stack. Use(middlewares ...func(http.Handler) http.Handler) // With adds inline middlewares for an endpoint handler. With(middlewares ...func(http.Handler) http.Handler) Router // Group adds a new inline-Router along the current routing // path, with a fresh middleware stack for the inline-Router. Group(fn func(r Router)) Router // Route mounts a sub-Router along a `pattern`` string. Route(pattern string, fn func(r Router)) Router // Mount attaches another http.Handler along ./pattern/* Mount(pattern string, h http.Handler) // Handle and HandleFunc adds routes for `pattern` that matches // all HTTP methods. Handle(pattern string, h http.Handler) HandleFunc(pattern string, h http.HandlerFunc) // Method and MethodFunc adds routes for `pattern` that matches // the `method` HTTP method. Method(method, pattern string, h http.Handler) MethodFunc(method, pattern string, h http.HandlerFunc) // HTTP-method routing along `pattern` Connect(pattern string, h http.HandlerFunc) Delete(pattern string, h http.HandlerFunc) Get(pattern string, h http.HandlerFunc) Head(pattern string, h http.HandlerFunc) Options(pattern string, h http.HandlerFunc) Patch(pattern string, h http.HandlerFunc) Post(pattern string, h http.HandlerFunc) Put(pattern string, h http.HandlerFunc) Trace(pattern string, h http.HandlerFunc) // NotFound defines a handler to respond whenever a route could // not be found. NotFound(h http.HandlerFunc) // MethodNotAllowed defines a handler to respond whenever a method is // not allowed. MethodNotAllowed(h http.HandlerFunc) } // Routes interface adds two methods for router traversal, which is also // used by the github.com/go-chi/docgen package to generate documentation for Routers. type Routes interface { // Routes returns the routing tree in an easily traversable structure. Routes() []Route // Middlewares returns the list of middlewares in use by the router. Middlewares() Middlewares // Match searches the routing tree for a handler that matches // the method/path - similar to routing a http request, but without // executing the handler thereafter. Match(rctx *Context, method, path string) bool }"><pre><span class="pl-c">// Router consisting of the core routing methods used by chi's Mux,</span> <span class="pl-c">// using only the standard net/http.</span> <span class="pl-k">type</span> <span class="pl-smi">Router</span> <span class="pl-k">interface</span> { http.<span class="pl-smi">Handler</span> <span class="pl-smi">Routes</span> <span class="pl-c">// Use appends one or more middlewares onto the Router stack.</span> <span class="pl-c1">Use</span>(<span class="pl-s1">middlewares</span> <span class="pl-c1">...</span><span class="pl-k">func</span>(http.<span class="pl-smi">Handler</span>) http.<span class="pl-smi">Handler</span>) <span class="pl-c">// With adds inline middlewares for an endpoint handler.</span> <span class="pl-c1">With</span>(<span class="pl-s1">middlewares</span> <span class="pl-c1">...</span><span class="pl-k">func</span>(http.<span class="pl-smi">Handler</span>) http.<span class="pl-smi">Handler</span>) <span class="pl-smi">Router</span> <span class="pl-c">// Group adds a new inline-Router along the current routing</span> <span class="pl-c">// path, with a fresh middleware stack for the inline-Router.</span> <span class="pl-c1">Group</span>(<span class="pl-s1">fn</span> <span class="pl-k">func</span>(<span class="pl-s1">r</span> <span class="pl-smi">Router</span>)) <span class="pl-smi">Router</span> <span class="pl-c">// Route mounts a sub-Router along a `pattern`` string.</span> <span class="pl-c1">Route</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">fn</span> <span class="pl-k">func</span>(<span class="pl-s1">r</span> <span class="pl-smi">Router</span>)) <span class="pl-smi">Router</span> <span class="pl-c">// Mount attaches another http.Handler along ./pattern/*</span> <span class="pl-c1">Mount</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">Handler</span>) <span class="pl-c">// Handle and HandleFunc adds routes for `pattern` that matches</span> <span class="pl-c">// all HTTP methods.</span> <span class="pl-c1">Handle</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">Handler</span>) <span class="pl-c1">HandleFunc</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c">// Method and MethodFunc adds routes for `pattern` that matches</span> <span class="pl-c">// the `method` HTTP method.</span> <span class="pl-c1">Method</span>(<span class="pl-s1">method</span>, <span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">Handler</span>) <span class="pl-c1">MethodFunc</span>(<span class="pl-s1">method</span>, <span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c">// HTTP-method routing along `pattern`</span> <span class="pl-c1">Connect</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Delete</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Get</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Head</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Options</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Patch</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Post</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Put</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c1">Trace</span>(<span class="pl-s1">pattern</span> <span class="pl-smi">string</span>, <span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c">// NotFound defines a handler to respond whenever a route could</span> <span class="pl-c">// not be found.</span> <span class="pl-c1">NotFound</span>(<span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) <span class="pl-c">// MethodNotAllowed defines a handler to respond whenever a method is</span> <span class="pl-c">// not allowed.</span> <span class="pl-c1">MethodNotAllowed</span>(<span class="pl-s1">h</span> http.<span class="pl-smi">HandlerFunc</span>) } <span class="pl-c">// Routes interface adds two methods for router traversal, which is also</span> <span class="pl-c">// used by the github.com/go-chi/docgen package to generate documentation for Routers.</span> <span class="pl-k">type</span> <span class="pl-smi">Routes</span> <span class="pl-k">interface</span> { <span class="pl-c">// Routes returns the routing tree in an easily traversable structure.</span> <span class="pl-c1">Routes</span>() []<span class="pl-smi">Route</span> <span class="pl-c">// Middlewares returns the list of middlewares in use by the router.</span> <span class="pl-c1">Middlewares</span>() <span class="pl-smi">Middlewares</span> <span class="pl-c">// Match searches the routing tree for a handler that matches</span> <span class="pl-c">// the method/path - similar to routing a http request, but without</span> <span class="pl-c">// executing the handler thereafter.</span> <span class="pl-c1">Match</span>(<span class="pl-s1">rctx</span> <span class="pl-c1">*</span><span class="pl-smi">Context</span>, <span class="pl-s1">method</span>, <span class="pl-s1">path</span> <span class="pl-smi">string</span>) <span class="pl-smi">bool</span> }</pre></div> <p dir="auto">Each routing method accepts a URL <code>pattern</code> and chain of <code>handlers</code>. The URL pattern supports named params (ie. <code>/users/{userID}</code>) and wildcards (ie. <code>/admin/*</code>). URL parameters can be fetched at runtime by calling <code>chi.URLParam(r, "userID")</code> for named parameters and <code>chi.URLParam(r, "*")</code> for a wildcard parameter.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Middleware handlers</h3><a id="user-content-middleware-handlers" class="anchor" aria-label="Permalink: Middleware handlers" href="#middleware-handlers"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">chi's middlewares are just stdlib net/http middleware handlers. There is nothing special about them, which means the router and all the tooling is designed to be compatible and friendly with any middleware in the community. This offers much better extensibility and reuse of packages and is at the heart of chi's purpose.</p> <p dir="auto">Here is an example of a standard net/http middleware where we assign a context key <code>"user"</code> the value of <code>"123"</code>. This middleware sets a hypothetical user identifier on the request context and calls the next handler in the chain.</p> <div class="highlight highlight-source-go notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// HTTP middleware setting a value on the request context func MyMiddleware(next http.Handler) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { // create new context from `r` request context, and assign key `"user"` // to value of `"123"` ctx := context.WithValue(r.Context(), "user", "123") // call the next handler in the chain, passing the response writer and // the updated request object with the new context value. // // note: context.Context values are nested, so any previously set // values will be accessible as well, and the new `"user"` key // will be accessible from this point forward. next.ServeHTTP(w, r.WithContext(ctx)) }) }"><pre><span class="pl-c">// HTTP middleware setting a value on the request context</span> <span class="pl-k">func</span> <span class="pl-s1">MyMiddleware</span>(<span class="pl-s1">next</span> http.<span class="pl-smi">Handler</span>) http.<span class="pl-smi">Handler</span> { <span class="pl-k">return</span> <span class="pl-s1">http</span>.<span class="pl-c1">HandlerFunc</span>(<span class="pl-k">func</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-c">// create new context from `r` request context, and assign key `"user"`</span> <span class="pl-c">// to value of `"123"`</span> <span class="pl-s1">ctx</span> <span class="pl-c1">:=</span> <span class="pl-s1">context</span>.<span class="pl-c1">WithValue</span>(<span class="pl-s1">r</span>.<span class="pl-c1">Context</span>(), <span class="pl-s">"user"</span>, <span class="pl-s">"123"</span>) <span class="pl-c">// call the next handler in the chain, passing the response writer and</span> <span class="pl-c">// the updated request object with the new context value.</span> <span class="pl-c">//</span> <span class="pl-c">// note: context.Context values are nested, so any previously set</span> <span class="pl-c">// values will be accessible as well, and the new `"user"` key</span> <span class="pl-c">// will be accessible from this point forward.</span> <span class="pl-s1">next</span>.<span class="pl-c1">ServeHTTP</span>(<span class="pl-s1">w</span>, <span class="pl-s1">r</span>.<span class="pl-c1">WithContext</span>(<span class="pl-s1">ctx</span>)) }) }</pre></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Request handlers</h3><a id="user-content-request-handlers" class="anchor" aria-label="Permalink: Request handlers" href="#request-handlers"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">chi uses standard net/http request handlers. This little snippet is an example of a http.Handler func that reads a user identifier from the request context - hypothetically, identifying the user sending an authenticated request, validated+set by a previous middleware handler.</p> <div class="highlight highlight-source-go notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// HTTP handler accessing data from the request context. func MyRequestHandler(w http.ResponseWriter, r *http.Request) { // here we read from the request context and fetch out `"user"` key set in // the MyMiddleware example above. user := r.Context().Value("user").(string) // respond to the client w.Write([]byte(fmt.Sprintf("hi %s", user))) }"><pre><span class="pl-c">// HTTP handler accessing data from the request context.</span> <span class="pl-k">func</span> <span class="pl-s1">MyRequestHandler</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-c">// here we read from the request context and fetch out `"user"` key set in</span> <span class="pl-c">// the MyMiddleware example above.</span> <span class="pl-s1">user</span> <span class="pl-c1">:=</span> <span class="pl-s1">r</span>.<span class="pl-c1">Context</span>().<span class="pl-c1">Value</span>(<span class="pl-s">"user"</span>).(<span class="pl-smi">string</span>) <span class="pl-c">// respond to the client</span> <span class="pl-s1">w</span>.<span class="pl-c1">Write</span>([]<span class="pl-smi">byte</span>(<span class="pl-s1">fmt</span>.<span class="pl-c1">Sprintf</span>(<span class="pl-s">"hi %s"</span>, <span class="pl-s1">user</span>))) }</pre></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">URL parameters</h3><a id="user-content-url-parameters" class="anchor" aria-label="Permalink: URL parameters" href="#url-parameters"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">chi's router parses and stores URL parameters right onto the request context. Here is an example of how to access URL params in your net/http handlers. And of course, middlewares are able to access the same information.</p> <div class="highlight highlight-source-go notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// HTTP handler accessing the url routing parameters. func MyRequestHandler(w http.ResponseWriter, r *http.Request) { // fetch the url parameter `"userID"` from the request of a matching // routing pattern. An example routing pattern could be: /users/{userID} userID := chi.URLParam(r, "userID") // fetch `"key"` from the request context ctx := r.Context() key := ctx.Value("key").(string) // respond to the client w.Write([]byte(fmt.Sprintf("hi %v, %v", userID, key))) }"><pre><span class="pl-c">// HTTP handler accessing the url routing parameters.</span> <span class="pl-k">func</span> <span class="pl-s1">MyRequestHandler</span>(<span class="pl-s1">w</span> http.<span class="pl-smi">ResponseWriter</span>, <span class="pl-s1">r</span> <span class="pl-c1">*</span>http.<span class="pl-smi">Request</span>) { <span class="pl-c">// fetch the url parameter `"userID"` from the request of a matching</span> <span class="pl-c">// routing pattern. An example routing pattern could be: /users/{userID}</span> <span class="pl-s1">userID</span> <span class="pl-c1">:=</span> <span class="pl-s1">chi</span>.<span class="pl-c1">URLParam</span>(<span class="pl-s1">r</span>, <span class="pl-s">"userID"</span>) <span class="pl-c">// fetch `"key"` from the request context</span> <span class="pl-s1">ctx</span> <span class="pl-c1">:=</span> <span class="pl-s1">r</span>.<span class="pl-c1">Context</span>() <span class="pl-s1">key</span> <span class="pl-c1">:=</span> <span class="pl-s1">ctx</span>.<span class="pl-c1">Value</span>(<span class="pl-s">"key"</span>).(<span class="pl-smi">string</span>) <span class="pl-c">// respond to the client</span> <span class="pl-s1">w</span>.<span class="pl-c1">Write</span>([]<span class="pl-smi">byte</span>(<span class="pl-s1">fmt</span>.<span class="pl-c1">Sprintf</span>(<span class="pl-s">"hi %v, %v"</span>, <span class="pl-s1">userID</span>, <span class="pl-s1">key</span>))) }</pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Middlewares</h2><a id="user-content-middlewares" class="anchor" aria-label="Permalink: Middlewares" href="#middlewares"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">chi comes equipped with an optional <code>middleware</code> package, providing a suite of standard <code>net/http</code> middlewares. Please note, any middleware in the ecosystem that is also compatible with <code>net/http</code> can be used with chi's mux.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Core middlewares</h3><a id="user-content-core-middlewares" class="anchor" aria-label="Permalink: Core middlewares" href="#core-middlewares"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <hr> <markdown-accessiblity-table><table> <thead> <tr> <th align="left">chi/middleware Handler</th> <th align="left">description</th> </tr> </thead> <tbody> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#AllowContentEncoding" rel="nofollow">AllowContentEncoding</a></td> <td align="left">Enforces a whitelist of request Content-Encoding headers</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#AllowContentType" rel="nofollow">AllowContentType</a></td> <td align="left">Explicit whitelist of accepted request Content-Types</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#BasicAuth" rel="nofollow">BasicAuth</a></td> <td align="left">Basic HTTP authentication</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Compress" rel="nofollow">Compress</a></td> <td align="left">Gzip compression for clients that accept compressed responses</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#ContentCharset" rel="nofollow">ContentCharset</a></td> <td align="left">Ensure charset for Content-Type request headers</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#CleanPath" rel="nofollow">CleanPath</a></td> <td align="left">Clean double slashes from request path</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#GetHead" rel="nofollow">GetHead</a></td> <td align="left">Automatically route undefined HEAD requests to GET handlers</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Heartbeat" rel="nofollow">Heartbeat</a></td> <td align="left">Monitoring endpoint to check the servers pulse</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Logger" rel="nofollow">Logger</a></td> <td align="left">Logs the start and end of each request with the elapsed processing time</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#NoCache" rel="nofollow">NoCache</a></td> <td align="left">Sets response headers to prevent clients from caching</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Profiler" rel="nofollow">Profiler</a></td> <td align="left">Easily attach net/http/pprof to your routers</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#RealIP" rel="nofollow">RealIP</a></td> <td align="left">Sets a http.Request's RemoteAddr to either X-Real-IP or X-Forwarded-For</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Recoverer" rel="nofollow">Recoverer</a></td> <td align="left">Gracefully absorb panics and prints the stack trace</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#RequestID" rel="nofollow">RequestID</a></td> <td align="left">Injects a request ID into the context of each request</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#RedirectSlashes" rel="nofollow">RedirectSlashes</a></td> <td align="left">Redirect slashes on routing paths</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#RouteHeaders" rel="nofollow">RouteHeaders</a></td> <td align="left">Route handling for request headers</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#SetHeader" rel="nofollow">SetHeader</a></td> <td align="left">Short-hand middleware to set a response header key/value</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#StripSlashes" rel="nofollow">StripSlashes</a></td> <td align="left">Strip slashes on routing paths</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/v5/middleware#Sunset" rel="nofollow">Sunset</a></td> <td align="left">Sunset set Deprecation/Sunset header to response</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Throttle" rel="nofollow">Throttle</a></td> <td align="left">Puts a ceiling on the number of concurrent requests</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#Timeout" rel="nofollow">Timeout</a></td> <td align="left">Signals to the request context when the timeout deadline is reached</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#URLFormat" rel="nofollow">URLFormat</a></td> <td align="left">Parse extension from url and put it on request context</td> </tr> <tr> <td align="left"><a href="https://pkg.go.dev/github.com/go-chi/chi/middleware#WithValue" rel="nofollow">WithValue</a></td> <td align="left">Short-hand middleware to set a key/value on the request context</td> </tr> </tbody> </table></markdown-accessiblity-table> <hr> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Extra middlewares & packages</h3><a id="user-content-extra-middlewares--packages" class="anchor" aria-label="Permalink: Extra middlewares & packages" href="#extra-middlewares--packages"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Please see <a href="https://github.com/go-chi">https://github.com/go-chi</a> for additional packages.</p> <hr> <markdown-accessiblity-table><table> <thead> <tr> <th align="left">package</th> <th align="left">description</th> </tr> </thead> <tbody> <tr> <td align="left"><a href="https://github.com/go-chi/cors">cors</a></td> <td align="left">Cross-origin resource sharing (CORS)</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/docgen">docgen</a></td> <td align="left">Print chi.Router routes at runtime</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/jwtauth">jwtauth</a></td> <td align="left">JWT authentication</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/hostrouter">hostrouter</a></td> <td align="left">Domain/host based request routing</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/httplog">httplog</a></td> <td align="left">Small but powerful structured HTTP request logging</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/httprate">httprate</a></td> <td align="left">HTTP request rate limiter</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/httptracer">httptracer</a></td> <td align="left">HTTP request performance tracing library</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/httpvcr">httpvcr</a></td> <td align="left">Write deterministic tests for external sources</td> </tr> <tr> <td align="left"><a href="https://github.com/go-chi/stampede">stampede</a></td> <td align="left">HTTP request coalescer</td> </tr> </tbody> </table></markdown-accessiblity-table> <hr> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">context?</h2><a id="user-content-context" class="anchor" aria-label="Permalink: context?" href="#context"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><code>context</code> is a tiny pkg that provides simple interface to signal context across call stacks and goroutines. It was originally written by <a href="https://github.com/Sajmani">Sameer Ajmani</a> and is available in stdlib since go1.7.</p> <p dir="auto">Learn more at <a href="https://blog.golang.org/context" rel="nofollow">https://blog.golang.org/context</a></p> <p dir="auto">and..</p> <ul dir="auto"> <li>Docs: <a href="https://golang.org/pkg/context" rel="nofollow">https://golang.org/pkg/context</a></li> <li>Source: <a href="https://github.com/golang/go/tree/master/src/context">https://github.com/golang/go/tree/master/src/context</a></li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Benchmarks</h2><a id="user-content-benchmarks" class="anchor" aria-label="Permalink: Benchmarks" href="#benchmarks"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The benchmark suite: <a href="https://github.com/pkieltyka/go-http-routing-benchmark">https://github.com/pkieltyka/go-http-routing-benchmark</a></p> <p dir="auto">Results as of Nov 29, 2020 with Go 1.15.5 on Linux AMD 3950x</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="BenchmarkChi_Param 3075895 384 ns/op 400 B/op 2 allocs/op BenchmarkChi_Param5 2116603 566 ns/op 400 B/op 2 allocs/op BenchmarkChi_Param20 964117 1227 ns/op 400 B/op 2 allocs/op BenchmarkChi_ParamWrite 2863413 420 ns/op 400 B/op 2 allocs/op BenchmarkChi_GithubStatic 3045488 395 ns/op 400 B/op 2 allocs/op BenchmarkChi_GithubParam 2204115 540 ns/op 400 B/op 2 allocs/op BenchmarkChi_GithubAll 10000 113811 ns/op 81203 B/op 406 allocs/op BenchmarkChi_GPlusStatic 3337485 359 ns/op 400 B/op 2 allocs/op BenchmarkChi_GPlusParam 2825853 423 ns/op 400 B/op 2 allocs/op BenchmarkChi_GPlus2Params 2471697 483 ns/op 400 B/op 2 allocs/op BenchmarkChi_GPlusAll 194220 5950 ns/op 5200 B/op 26 allocs/op BenchmarkChi_ParseStatic 3365324 356 ns/op 400 B/op 2 allocs/op BenchmarkChi_ParseParam 2976614 404 ns/op 400 B/op 2 allocs/op BenchmarkChi_Parse2Params 2638084 439 ns/op 400 B/op 2 allocs/op BenchmarkChi_ParseAll 109567 11295 ns/op 10400 B/op 52 allocs/op BenchmarkChi_StaticAll 16846 71308 ns/op 62802 B/op 314 allocs/op"><pre>BenchmarkChi_Param 3075895 384 ns/op 400 B/op 2 allocs/op BenchmarkChi_Param5 2116603 566 ns/op 400 B/op 2 allocs/op BenchmarkChi_Param20 964117 1227 ns/op 400 B/op 2 allocs/op BenchmarkChi_ParamWrite 2863413 420 ns/op 400 B/op 2 allocs/op BenchmarkChi_GithubStatic 3045488 395 ns/op 400 B/op 2 allocs/op BenchmarkChi_GithubParam 2204115 540 ns/op 400 B/op 2 allocs/op BenchmarkChi_GithubAll 10000 113811 ns/op 81203 B/op 406 allocs/op BenchmarkChi_GPlusStatic 3337485 359 ns/op 400 B/op 2 allocs/op BenchmarkChi_GPlusParam 2825853 423 ns/op 400 B/op 2 allocs/op BenchmarkChi_GPlus2Params 2471697 483 ns/op 400 B/op 2 allocs/op BenchmarkChi_GPlusAll 194220 5950 ns/op 5200 B/op 26 allocs/op BenchmarkChi_ParseStatic 3365324 356 ns/op 400 B/op 2 allocs/op BenchmarkChi_ParseParam 2976614 404 ns/op 400 B/op 2 allocs/op BenchmarkChi_Parse2Params 2638084 439 ns/op 400 B/op 2 allocs/op BenchmarkChi_ParseAll 109567 11295 ns/op 10400 B/op 52 allocs/op BenchmarkChi_StaticAll 16846 71308 ns/op 62802 B/op 314 allocs/op</pre></div> <p dir="auto">Comparison with other routers: <a href="https://gist.github.com/pkieltyka/123032f12052520aaccab752bd3e78cc">https://gist.github.com/pkieltyka/123032f12052520aaccab752bd3e78cc</a></p> <p dir="auto">NOTE: the allocs in the benchmark above are from the calls to http.Request's <code>WithContext(context.Context)</code> method that clones the http.Request, sets the <code>Context()</code> on the duplicated (alloc'd) request and returns it the new request object. This is just how setting context on a request in Go works.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Credits</h2><a id="user-content-credits" class="anchor" aria-label="Permalink: Credits" href="#credits"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li>Carl Jackson for <a href="https://github.com/zenazn/goji">https://github.com/zenazn/goji</a> <ul dir="auto"> <li>Parts of chi's thinking comes from goji, and chi's middleware package sources from goji.</li> </ul> </li> <li>Armon Dadgar for <a href="https://github.com/armon/go-radix">https://github.com/armon/go-radix</a></li> <li>Contributions: <a href="https://github.com/VojtechVitek">@VojtechVitek</a></li> </ul> <p dir="auto">We'll be more than happy to see <a href="/geekvest/chi/blob/master/CONTRIBUTING.md">your contributions</a>!</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Beyond REST</h2><a id="user-content-beyond-rest" class="anchor" aria-label="Permalink: Beyond REST" href="#beyond-rest"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">chi is just a http router that lets you decompose request handling into many smaller layers. Many companies use chi to write REST services for their public APIs. But, REST is just a convention for managing state via HTTP, and there's a lot of other pieces required to write a complete client-server system or network of microservices.</p> <p dir="auto">Looking beyond REST, I also recommend some newer works in the field:</p> <ul dir="auto"> <li><a href="https://github.com/webrpc/webrpc">webrpc</a> - Web-focused RPC client+server framework with code-gen</li> <li><a href="https://github.com/grpc/grpc-go">gRPC</a> - Google's RPC framework via protobufs</li> <li><a href="https://github.com/99designs/gqlgen">graphql</a> - Declarative query language</li> <li><a href="https://nats.io" rel="nofollow">NATS</a> - lightweight pub-sub</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">License</h2><a id="user-content-license" class="anchor" aria-label="Permalink: License" href="#license"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Copyright (c) 2015-present <a href="https://github.com/pkieltyka">Peter Kieltyka</a></p> <p dir="auto">Licensed under <a href="/geekvest/chi/blob/master/LICENSE">MIT License</a></p> </article></div></div></div></div></div> <!-- --> <!-- --> <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" 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