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GitHub - ampproject/amppackager: Tool to improve AMP URLs via Signed Exchanges
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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 border-lg-bottom-0"> <ul class="list-style-none f5" > <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":"github_copilot","context":"product","tag":"link","label":"github_copilot_link_product_navbar"}" href="https://github.com/features/copilot"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-copilot color-fg-subtle mr-3"> <path d="M23.922 16.992c-.861 1.495-5.859 5.023-11.922 5.023-6.063 0-11.061-3.528-11.922-5.023A.641.641 0 0 1 0 16.736v-2.869a.841.841 0 0 1 .053-.22c.372-.935 1.347-2.292 2.605-2.656.167-.429.414-1.055.644-1.517a10.195 10.195 0 0 1-.052-1.086c0-1.331.282-2.499 1.132-3.368.397-.406.89-.717 1.474-.952 1.399-1.136 3.392-2.093 6.122-2.093 2.731 0 4.767.957 6.166 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 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 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Overlay--size-medium Overlay--motion-scaleFade Overlay--disableScroll"> <div data-view-component="true" class="Overlay-header Overlay-header--divided"> <div class="Overlay-headerContentWrap"> <div class="Overlay-titleWrap"> <h1 class="Overlay-title " id="custom-scopes-dialog-title"> Saved searches </h1> <h2 id="custom-scopes-dialog-description" class="Overlay-description">Use saved searches to filter your results more quickly</h2> </div> <div class="Overlay-actionWrap"> <button data-close-dialog-id="custom-scopes-dialog" aria-label="Close" type="button" data-view-component="true" class="close-button Overlay-closeButton"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 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="NHDSurEgZGQmr0Fy/y0NmiN//W+XY9fHQMXz3yMPwTlYP46TF9djVWJHbqe9v6xwWKdyNPXmfr5AlPrd4HbWWA==" /> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <input type="hidden" id="custom_scope_id" name="custom_scope_id" data-target="custom-scopes.customScopesIdField"> <div class="form-group"> <label for="custom_scope_name">Name</label> <auto-check src="/search/custom_scopes/check_name" required> <input type="text" name="custom_scope_name" id="custom_scope_name" data-target="custom-scopes.customScopesNameField" class="form-control" autocomplete="off" placeholder="github-ruby" required maxlength="50"> <input type="hidden" data-csrf="true" value="faRgHrJg+h8VUzwo1ZkKfzXJ6O3xmFvXQpkN3p6Lz32lOHOZgJx7X1ICo5pL6xcrvn4RKapJCWY5MmBffh7pEQ==" /> </auto-check> </div> <div class="form-group"> <label for="custom_scope_query">Query</label> <input type="text" name="custom_scope_query" id="custom_scope_query" data-target="custom-scopes.customScopesQueryField" class="form-control" autocomplete="off" placeholder="(repo:mona/a OR repo:mona/b) AND lang:python" required maxlength="500"> </div> <p class="text-small color-fg-muted"> To see all available qualifiers, see our <a class="Link--inTextBlock" href="https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax">documentation</a>. </p> </form> </div> <div data-target="custom-scopes.manageCustomScopesForm"> <div data-target="custom-scopes.list"></div> </div> </div> </scrollable-region> <div data-view-component="true" class="Overlay-footer Overlay-footer--alignEnd Overlay-footer--divided"> <button data-action="click:custom-scopes#customScopesCancel" type="button" data-view-component="true" class="btn"> Cancel </button> <button form="custom-scopes-dialog-form" data-action="click:custom-scopes#customScopesSubmit" data-target="custom-scopes.customScopesSubmitButton" type="submit" data-view-component="true" class="btn-primary btn"> Create saved search </button> </div> </dialog></dialog-helper> </custom-scopes> </div> </qbsearch-input> <div class="position-relative HeaderMenu-link-wrap d-lg-inline-block"> <a href="/login?return_to=https%3A%2F%2Fgithub.com%2Fampproject%2Famppackager" class="HeaderMenu-link HeaderMenu-link--sign-in HeaderMenu-button flex-shrink-0 no-underline d-none d-lg-inline-flex border border-lg-0 rounded rounded-lg-0 px-2 py-1" style="margin-left: 12px;" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"site header menu","repository_id":null,"auth_type":"SIGN_UP","originating_url":"https://github.com/ampproject/amppackager","user_id":null}}" data-hydro-click-hmac="d7ba2bede84e66b4cdd496c7bcd59f7a50a71337f38b7565acacee3907a14e26" data-analytics-event="{"category":"Marketing nav","action":"click to go to homepage","label":"ref_page:Marketing;ref_cta:Sign in;ref_loc:Header"}" > Sign in </a> </div> <a href="/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E&source=header-repo&source_repo=ampproject%2Famppackager" class="HeaderMenu-link HeaderMenu-link--sign-up HeaderMenu-button flex-shrink-0 d-flex d-lg-inline-flex no-underline border color-border-default rounded px-2 py-1" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"site header menu","repository_id":null,"auth_type":"SIGN_UP","originating_url":"https://github.com/ampproject/amppackager","user_id":null}}" data-hydro-click-hmac="d7ba2bede84e66b4cdd496c7bcd59f7a50a71337f38b7565acacee3907a14e26" data-analytics-event="{"category":"Sign up","action":"click to sign up for account","label":"ref_page:/<user-name>/<repo-name>;ref_cta:Sign up;ref_loc:header logged out"}" > Sign up </a> <button type="button" class="sr-only js-header-menu-focus-trap d-block d-lg-none">Reseting focus</button> </div> </div> </div> </div> </header> <div hidden="hidden" data-view-component="true" class="js-stale-session-flash stale-session-flash flash flash-warn flash-full"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert"> <path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path> </svg> <span class="js-stale-session-flash-signed-in" hidden>You signed in with another tab or window. <a class="Link--inTextBlock" href="">Reload</a> to refresh your session.</span> <span class="js-stale-session-flash-signed-out" hidden>You signed out in another tab or window. <a class="Link--inTextBlock" href="">Reload</a> to refresh your session.</span> <span class="js-stale-session-flash-switched" hidden>You switched accounts on another tab or window. <a class="Link--inTextBlock" href="">Reload</a> to refresh your session.</span> <button id="icon-button-6cae7273-7884-4a8c-bb22-d45703292c29" aria-labelledby="tooltip-7b3226d9-4b2d-4ea8-b830-d142b294b716" type="button" data-view-component="true" class="Button Button--iconOnly Button--invisible Button--medium flash-close js-flash-close"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x Button-visual"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 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><tool-tip id="tooltip-7b3226d9-4b2d-4ea8-b830-d142b294b716" for="icon-button-6cae7273-7884-4a8c-bb22-d45703292c29" popover="manual" data-direction="s" data-type="label" data-view-component="true" class="sr-only position-absolute">Dismiss alert</tool-tip> </div> </div> <div id="start-of-content" class="show-on-focus"></div> <div id="js-flash-container" class="flash-container" data-turbo-replace> <template class="js-flash-template"> <div class="flash flash-full {{ className }}"> <div > <button autofocus class="flash-close js-flash-close" type="button" aria-label="Dismiss this message"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 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 aria-atomic="true" role="alert" class="js-flash-alert"> <div>{{ message }}</div> </div> </div> </div> </template> </div> <div class="application-main " data-commit-hovercards-enabled data-discussion-hovercards-enabled data-issue-and-pr-hovercards-enabled > <div itemscope itemtype="http://schema.org/SoftwareSourceCode" class=""> <main id="js-repo-pjax-container" > <div id="repository-container-header" class="pt-3 hide-full-screen" style="background-color: var(--page-header-bgColor, var(--color-page-header-bg));" data-turbo-replace> <div class="d-flex flex-nowrap flex-justify-end mb-3 px-3 px-lg-5" style="gap: 1rem;"> <div class="flex-auto min-width-0 width-fit"> <div class=" d-flex flex-wrap flex-items-center wb-break-word f3 text-normal"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo color-fg-muted mr-2"> <path d="M2 2.5A2.5 2.5 0 0 1 4.5 0h8.75a.75.75 0 0 1 .75.75v12.5a.75.75 0 0 1-.75.75h-2.5a.75.75 0 0 1 0-1.5h1.75v-2h-8a1 1 0 0 0-.714 1.7.75.75 0 1 1-1.072 1.05A2.495 2.495 0 0 1 2 11.5Zm10.5-1h-8a1 1 0 0 0-1 1v6.708A2.486 2.486 0 0 1 4.5 9h8ZM5 12.25a.25.25 0 0 1 .25-.25h3.5a.25.25 0 0 1 .25.25v3.25a.25.25 0 0 1-.4.2l-1.45-1.087a.249.249 0 0 0-.3 0L5.4 15.7a.25.25 0 0 1-.4-.2Z"></path> </svg> <span class="author flex-self-stretch" itemprop="author"> <a class="url fn" rel="author" data-hovercard-type="organization" data-hovercard-url="/orgs/ampproject/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/ampproject"> ampproject </a> </span> <span class="mx-1 flex-self-stretch color-fg-muted">/</span> <strong itemprop="name" class="mr-2 flex-self-stretch"> <a data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/ampproject/amppackager">amppackager</a> </strong> <span></span><span class="Label Label--secondary v-align-middle mr-1">Public</span> </div> </div> <div id="repository-details-container" class="flex-shrink-0" data-turbo-replace style="max-width: 70%;"> <ul class="pagehead-actions flex-shrink-0 d-none d-md-inline" style="padding: 2px 0;"> <li> <a href="/login?return_to=%2Fampproject%2Famppackager" rel="nofollow" id="repository-details-watch-button" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"notification subscription menu watch","repository_id":null,"auth_type":"LOG_IN","originating_url":"https://github.com/ampproject/amppackager","user_id":null}}" data-hydro-click-hmac="9406d2a02cf1cd4037911033578640c6c35300c005e40bea94693e318681ff6e" aria-label="You must be signed in to change notification settings" data-view-component="true" class="btn-sm btn"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bell mr-2"> <path d="M8 16a2 2 0 0 0 1.985-1.75c.017-.137-.097-.25-.235-.25h-3.5c-.138 0-.252.113-.235.25A2 2 0 0 0 8 16ZM3 5a5 5 0 0 1 10 0v2.947c0 .05.015.098.042.139l1.703 2.555A1.519 1.519 0 0 1 13.482 13H2.518a1.516 1.516 0 0 1-1.263-2.36l1.703-2.554A.255.255 0 0 0 3 7.947Zm5-3.5A3.5 3.5 0 0 0 4.5 5v2.947c0 .346-.102.683-.294.97l-1.703 2.556a.017.017 0 0 0-.003.01l.001.006c0 .002.002.004.004.006l.006.004.007.001h10.964l.007-.001.006-.004.004-.006.001-.007a.017.017 0 0 0-.003-.01l-1.703-2.554a1.745 1.745 0 0 1-.294-.97V5A3.5 3.5 0 0 0 8 1.5Z"></path> </svg>Notifications </a> <tool-tip id="tooltip-d2dc65bd-8f11-497a-a2e8-cee1af97efc3" for="repository-details-watch-button" popover="manual" data-direction="s" data-type="description" data-view-component="true" class="sr-only position-absolute">You must be signed in to change notification settings</tool-tip> </li> <li> <a icon="repo-forked" id="fork-button" href="/login?return_to=%2Fampproject%2Famppackager" rel="nofollow" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"repo details fork button","repository_id":127183271,"auth_type":"LOG_IN","originating_url":"https://github.com/ampproject/amppackager","user_id":null}}" data-hydro-click-hmac="ff7bed49a58bf86d775b5f5ec06aa727c4011226b7c7cc52aca8f108f206fe52" data-view-component="true" class="btn-sm btn"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg>Fork <span id="repo-network-counter" data-pjax-replace="true" data-turbo-replace="true" title="55" data-view-component="true" class="Counter">55</span> </a> </li> <li> <div data-view-component="true" class="BtnGroup d-flex"> <a href="/login?return_to=%2Fampproject%2Famppackager" rel="nofollow" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"star button","repository_id":127183271,"auth_type":"LOG_IN","originating_url":"https://github.com/ampproject/amppackager","user_id":null}}" data-hydro-click-hmac="090d13995818352903376a3d28446be587128be3f6302a8a58f0f75375d0a7bd" aria-label="You must be signed in to star a repository" data-view-component="true" class="tooltipped tooltipped-sw btn-sm btn"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star v-align-text-bottom d-inline-block mr-2"> <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg><span data-view-component="true" class="d-inline"> Star </span> <span id="repo-stars-counter-star" aria-label="140 users starred this repository" data-singular-suffix="user starred this repository" data-plural-suffix="users starred this repository" data-turbo-replace="true" title="140" data-view-component="true" class="Counter js-social-count">140</span> </a></div> </li> </ul> </div> </div> <div id="responsive-meta-container" data-turbo-replace> <div class="d-block d-md-none mb-2 px-3 px-md-4 px-lg-5"> <p class="f4 mb-3 "> Tool to improve AMP URLs via Signed Exchanges </p> <div class="mb-2 d-flex flex-items-center Link--secondary"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link flex-shrink-0 mr-2"> <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> <span class="flex-auto min-width-0 css-truncate css-truncate-target width-fit"> <a title="https://amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/" role="link" target="_blank" class="text-bold" rel="noopener noreferrer" href="https://amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/">amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/</a> </span> </div> <h3 class="sr-only">License</h3> <div class="mb-2"> <a href="/ampproject/amppackager/blob/releases/LICENSE" class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:license"}" > <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-law mr-2"> <path d="M8.75.75V2h.985c.304 0 .603.08.867.231l1.29.736c.038.022.08.033.124.033h2.234a.75.75 0 0 1 0 1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.78 13.88 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 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data-target="react-partial.embeddedData">{"props":{"initialPayload":{"allShortcutsEnabled":false,"path":"/","repo":{"id":127183271,"defaultBranch":"releases","name":"amppackager","ownerLogin":"ampproject","currentUserCanPush":false,"isFork":false,"isEmpty":false,"createdAt":"2018-03-28T18:40:49.000Z","ownerAvatar":"https://avatars.githubusercontent.com/u/14114390?v=4","public":true,"private":false,"isOrgOwned":true},"currentUser":null,"refInfo":{"name":"releases","listCacheKey":"v0:1727276596.0","canEdit":false,"refType":"branch","currentOid":"57974efc943c09fec5e5d3cd4b95e70a482946f9"},"tree":{"items":[{"name":".github","path":".github","contentType":"directory"},{"name":"cmd","path":"cmd","contentType":"directory"},{"name":"deploy/gcloud","path":"deploy/gcloud","contentType":"directory","hasSimplifiedPath":true},{"name":"docker","path":"docker","contentType":"directory"},{"name":"docs","path":"docs","contentType":"directory"},{"name":"fuzz_httpreq","path":"fuzz_httpreq","contentType":"directory"},{"name":"fuzz_httpresp","path":"fuzz_httpresp","contentType":"directory"},{"name":"internal/url","path":"internal/url","contentType":"directory","hasSimplifiedPath":true},{"name":"packager","path":"packager","contentType":"directory"},{"name":"testdata/b3","path":"testdata/b3","contentType":"directory","hasSimplifiedPath":true},{"name":"transformer","path":"transformer","contentType":"directory"},{"name":"vendor","path":"vendor","contentType":"directory"},{"name":".gitattributes","path":".gitattributes","contentType":"file"},{"name":".gitignore","path":".gitignore","contentType":"file"},{"name":"CODE_OF_CONDUCT.md","path":"CODE_OF_CONDUCT.md","contentType":"file"},{"name":"CONTRIBUTING.md","path":"CONTRIBUTING.md","contentType":"file"},{"name":"LICENSE","path":"LICENSE","contentType":"file"},{"name":"Makefile","path":"Makefile","contentType":"file"},{"name":"README.md","path":"README.md","contentType":"file"},{"name":"amppkg.example.toml","path":"amppkg.example.toml","contentType":"file"},{"name":"go.mod","path":"go.mod","contentType":"file"},{"name":"go.sum","path":"go.sum","contentType":"file"},{"name":"monitoring.md","path":"monitoring.md","contentType":"file"},{"name":"regenerate.sh","path":"regenerate.sh","contentType":"file"},{"name":"renovate.json","path":"renovate.json","contentType":"file"}],"templateDirectorySuggestionUrl":null,"readme":null,"totalCount":25,"showBranchInfobar":false},"fileTree":null,"fileTreeProcessingTime":null,"foldersToFetch":[],"treeExpanded":false,"symbolsExpanded":false,"isOverview":true,"overview":{"banners":{"shouldRecommendReadme":false,"isPersonalRepo":false,"showUseActionBanner":false,"actionSlug":null,"actionId":null,"showProtectBranchBanner":false,"publishBannersInfo":{"dismissActionNoticePath":"/settings/dismiss-notice/publish_action_from_repo","releasePath":"/ampproject/amppackager/releases/new?marketplace=true","showPublishActionBanner":false},"interactionLimitBanner":null,"showInvitationBanner":false,"inviterName":null,"actionsMigrationBannerInfo":{"releaseTags":[],"showImmutableActionsMigrationBanner":false,"initialMigrationStatus":null}},"codeButton":{"contactPath":"/contact","isEnterprise":false,"local":{"protocolInfo":{"httpAvailable":true,"sshAvailable":null,"httpUrl":"https://github.com/ampproject/amppackager.git","showCloneWarning":null,"sshUrl":null,"sshCertificatesRequired":null,"sshCertificatesAvailable":null,"ghCliUrl":"gh repo clone ampproject/amppackager","defaultProtocol":"http","newSshKeyUrl":"/settings/ssh/new","setProtocolPath":"/users/set_protocol"},"platformInfo":{"cloneUrl":"https://desktop.github.com","showVisualStudioCloneButton":false,"visualStudioCloneUrl":"https://windows.github.com","showXcodeCloneButton":false,"xcodeCloneUrl":"xcode://clone?repo=https%3A%2F%2Fgithub.com%2Fampproject%2Famppackager","zipballUrl":"/ampproject/amppackager/archive/refs/heads/releases.zip"}},"newCodespacePath":"/codespaces/new?hide_repo_select=true\u0026repo=127183271"},"popovers":{"rename":null,"renamedParentRepo":null},"commitCount":"530","overviewFiles":[{"displayName":"README.md","repoName":"amppackager","refName":"releases","path":"README.md","preferredFileType":"readme","tabName":"README","richText":"\u003carticle class=\"markdown-body entry-content container-lg\" itemprop=\"text\"\u003e\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAMP Packager\u003c/h1\u003e\u003ca id=\"user-content-amp-packager\" class=\"anchor\" aria-label=\"Permalink: AMP Packager\" href=\"#amp-packager\"\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\"\u003eAMP Packager is a tool to \u003ca href=\"https://blog.amp.dev/2018/11/13/developer-preview-of-better-amp-urls-in-google-search/\" rel=\"nofollow\"\u003eimprove AMP URLs\u003c/a\u003e\nby \u003ca href=\"https://amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/\" rel=\"nofollow\"\u003eserving AMP using Signed Exchanges\u003c/a\u003e.\nBy running it in a proper configuration, web publishers enable origin URLs to\nappear in AMP search results.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe AMP Packager works by creating \u003ca href=\"https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html\" rel=\"nofollow\"\u003eSigned HTTP\nExchanges (SXGs)\u003c/a\u003e\ncontaining AMP documents, signed with a certificate associated with the origin,\nwith a maximum lifetime of 7 days. The \u003ca href=\"https://amp.dev/documentation/guides-and-tutorials/learn/amp-caches-and-cors/how_amp_pages_are_cached/\" rel=\"nofollow\"\u003eGoogle AMP\nCache\u003c/a\u003e will fetch,\ncache, and serve them, similar to what it does for normal AMP HTML documents.\nWhen a user loads such an SXG, Chrome validates the signature and then displays\nthe certificate's domain in the URL bar instead of \u003ccode\u003egoogle.com\u003c/code\u003e, and treats the\nweb page as though it were on that domain.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe packager is an HTTP server that sits behind a frontend server; it fetches\nand signs AMP documents as requested by the AMP Cache.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAs an alternative to running the packager, you can sign up for one of the SXG \u003ca href=\"https://github.com/ampproject/amppackager/wiki/Service-Providers\"\u003eservice providers\u003c/a\u003e.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePackager/Signer\u003c/h2\u003e\u003ca id=\"user-content-packagersigner\" class=\"anchor\" aria-label=\"Permalink: Packager/Signer\" href=\"#packagersigner\"\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\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHow to use\u003c/h3\u003e\u003ca id=\"user-content-how-to-use\" class=\"anchor\" aria-label=\"Permalink: How to use\" href=\"#how-to-use\"\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\"\u003eIn all the instructions below, replace \u003ccode\u003eamppackageexample.com\u003c/code\u003e with a domain you\nown and can obtain certificates for.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDevelopment server\u003c/h4\u003e\u003ca id=\"user-content-development-server\" class=\"anchor\" aria-label=\"Permalink: Development server\" href=\"#development-server\"\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\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch5 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eManual installation\u003c/h5\u003e\u003ca id=\"user-content-manual-installation\" class=\"anchor\" aria-label=\"Permalink: Manual installation\" href=\"#manual-installation\"\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\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eInstall Go version 1.13 or higher.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eGet amppackager.\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"git clone https://github.com/ampproject/amppackager.git my-amp-directory\ncd my-amp-directory\nmake build\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003egit clone https://github.com/ampproject/amppackager.git my-amp-directory\ncd my-amp-directory\nmake build\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eOptionally, move the built \u003ccode\u003eamppkg\u003c/code\u003e wherever you like.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003ePrepare a temporary certificate and private key pair to use for signing the\nexchange when testing your config. Follow WICG\n\u003ca href=\"https://github.com/WICG/webpackage/tree/master/go/signedexchange#creating-our-first-signed-exchange\"\u003einstructions\u003c/a\u003e\nto ensure compliance with the \u003ca href=\"https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html#cross-origin-cert-req\" rel=\"nofollow\"\u003eWICG certificate\nrequirements\u003c/a\u003e.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eCreate a file \u003ccode\u003eamppkg.toml\u003c/code\u003e. A minimal config looks like this:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"LocalOnly = true\nCertFile = 'path/to/fullchain.pem'\nKeyFile = 'path/to/privkey.pem'\nOCSPCache = '/tmp/amppkg-ocsp'\n\n[[URLSet]]\n [URLSet.Sign]\n Domain = \u0026quot;amppackageexample.com\u0026quot;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eLocalOnly = true\nCertFile = 'path/to/fullchain.pem'\nKeyFile = 'path/to/privkey.pem'\nOCSPCache = '/tmp/amppkg-ocsp'\n\n[[URLSet]]\n [URLSet.Sign]\n Domain = \"amppackageexample.com\"\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eMore details can be found in \u003ca href=\"/ampproject/amppackager/blob/releases/amppkg.example.toml\"\u003eamppkg.example.toml\u003c/a\u003e.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eamppkg -development\u003c/code\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf \u003ccode\u003eamppkg.toml\u003c/code\u003e is not in the current working directory, pass\n\u003ccode\u003e-config=/path/to/amppkg.toml\u003c/code\u003e.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch5 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDocker\u003c/h5\u003e\u003ca id=\"user-content-docker\" class=\"anchor\" aria-label=\"Permalink: Docker\" href=\"#docker\"\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\"\u003eFollow the instructions \u003ca href=\"/ampproject/amppackager/blob/releases/docker/README.md\"\u003ehere\u003c/a\u003e on how to deploy a local Docker\ncontainer.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eTest your config\u003c/h4\u003e\u003ca id=\"user-content-test-your-config\" class=\"anchor\" aria-label=\"Permalink: Test your config\" href=\"#test-your-config\"\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\u003col dir=\"auto\"\u003e\n\u003cli\u003eRun Chrome with the following command line flags:\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"alias chrome = [FULL PATH TO CHROME BINARY]\nPATH_TO_FULLCHAIN_PEM = [FULL PATH TO fullchain.pem]\nchrome --user-data-dir=/tmp/udd\\\n --ignore-certificate-errors-spki-list=$(\\\n openssl x509 -pubkey -noout -in $PATH_TO_FULLCHAIN_PEM |\\\n openssl pkey -pubin -outform der |\\\n openssl dgst -sha256 -binary | base64)\\\n --enable-features=SignedHTTPExchange\\\n 'data:text/html,\u0026lt;a href=\u0026quot;https://localhost:8080/priv/doc/https://amppackageexample.com/\u0026quot;\u0026gt;click me'\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003ealias chrome = [FULL PATH TO CHROME BINARY]\nPATH_TO_FULLCHAIN_PEM = [FULL PATH TO fullchain.pem]\nchrome --user-data-dir=/tmp/udd\\\n --ignore-certificate-errors-spki-list=$(\\\n openssl x509 -pubkey -noout -in $PATH_TO_FULLCHAIN_PEM |\\\n openssl pkey -pubin -outform der |\\\n openssl dgst -sha256 -binary | base64)\\\n --enable-features=SignedHTTPExchange\\\n 'data:text/html,\u0026lt;a href=\"https://localhost:8080/priv/doc/https://amppackageexample.com/\"\u0026gt;click me'\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003eOpen DevTools. Check 'Preserve log'.\u003c/li\u003e\n\u003cli\u003eClick the \u003ccode\u003eclick me\u003c/code\u003e link.\u003c/li\u003e\n\u003cli\u003eWatch the URL transmogrify! Verify it came from an SXG by switching\nDevTools to the Network tab and looking in the \u003ccode\u003eSize\u003c/code\u003e column for \u003ccode\u003e(from signed-exchange)\u003c/code\u003e and in the \u003ccode\u003eType\u003c/code\u003e column for \u003ccode\u003esigned-exchange\u003c/code\u003e. Click on\nthat row and then click on the Preview tab, to see if there are any errors.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDemonstrate privacy-preserving prefetch\u003c/h4\u003e\u003ca id=\"user-content-demonstrate-privacy-preserving-prefetch\" class=\"anchor\" aria-label=\"Permalink: Demonstrate privacy-preserving prefetch\" href=\"#demonstrate-privacy-preserving-prefetch\"\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\"\u003eThis step is optional; just to show how \u003ca href=\"https://wicg.github.io/webpackage/draft-yasskin-wpack-use-cases.html#private-prefetch\" rel=\"nofollow\"\u003eprivacy-preserving\nprefetch\u003c/a\u003e\nworks with SXGs.\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ego get -u github.com/ampproject/amppackager/cmd/amppkg_dl_sxg\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eamppkg_dl_sxg https://localhost:8080/priv/doc/https://amppackageexample.com/\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003eStop \u003ccode\u003eamppkg\u003c/code\u003e with Ctrl-C.\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ego get -u github.com/ampproject/amppackager/cmd/amppkg_test_cache\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eamppkg_test_cache\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003eOpen Chrome and DevTools, as above.\u003c/li\u003e\n\u003cli\u003eVisit \u003ccode\u003ehttps://localhost:8000/\u003c/code\u003e. Observe the prefetch of \u003ccode\u003e/test.sxg\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eClick the link. Observe that the cached SXG is used.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eProductionizing\u003c/h4\u003e\u003ca id=\"user-content-productionizing\" class=\"anchor\" aria-label=\"Permalink: Productionizing\" href=\"#productionizing\"\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\"\u003eFor now, productionizing is a bit manual. The minimum steps are:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eDon't pass \u003ccode\u003e-development\u003c/code\u003e flag to \u003ccode\u003eamppkg\u003c/code\u003e. This causes it to serve HTTP\nrather than HTTPS, among other changes.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eDon't expose \u003ccode\u003eamppkg\u003c/code\u003e to the outside world; keep it on your internal\nnetwork.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eConfigure your TLS-serving frontend server to conditionally proxy to\n\u003ccode\u003eamppkg\u003c/code\u003e:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eIf the URL starts with \u003ccode\u003e/amppkg/\u003c/code\u003e, forward the request unmodified.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eIf the URL points to an AMP page and the \u003ccode\u003eAMP-Cache-Transform\u003c/code\u003e request\nheader is present, rewrite the URL by prepending \u003ccode\u003e/priv/doc\u003c/code\u003e and forward\nthe request.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eNOTE: If using nginx, prefer using \u003ccode\u003eproxy_pass\u003c/code\u003e with \u003ccode\u003e$request_uri\u003c/code\u003e,\nrather than using \u003ccode\u003erewrite\u003c/code\u003e, as in \u003ca href=\"https://github.com/Warashi/try-amppackager/pull/3\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/Warashi/try-amppackager/pull/3/hovercard\"\u003ethis PR\u003c/a\u003e,\nto avoid percent-encoding issues.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eIf at all possible, don't send URLs of non-AMP pages to \u003ccode\u003eamppkg\u003c/code\u003e; its\n\u003ca href=\"/ampproject/amppackager/blob/releases/transformer\"\u003etransforms\u003c/a\u003e may break non-AMP HTML.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eDO NOT forward \u003ccode\u003e/priv/doc\u003c/code\u003e requests; these URLs are meant to be\ngenerated by the frontend server only.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eFor HTTP compliance, ensure the \u003ccode\u003eVary\u003c/code\u003e header set to \u003ccode\u003eAMP-Cache-Transform, Accept\u003c/code\u003e for all URLs that point to an AMP page, irrespective of whether the\nresponse is HTML or SXG. (SXG responses that come from \u003ccode\u003eamppkg\u003c/code\u003e will have\nthe appropriate \u003ccode\u003eVary\u003c/code\u003e header set, so it may only be necessary to\nexplicitly set the \u003ccode\u003eVary\u003c/code\u003e header for HTML responses.)\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eGet an SXG cert from your CA. It must use an EC key with the prime256v1\nalgorithm, and it must have a \u003ca href=\"https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html#cross-origin-cert-req\" rel=\"nofollow\"\u003eCanSignHttpExchanges\nextension\u003c/a\u003e.\nOne provider of SXG certs is \u003ca href=\"https://www.digicert.com/account/ietf/http-signed-exchange.php\" rel=\"nofollow\"\u003eDigiCert\u003c/a\u003e.\nYou MUST use this in \u003ccode\u003eamppkg.toml\u003c/code\u003e, and MUST NOT use it in your frontend.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eEvery 90 days or sooner, renew your SXG cert (per\n\u003ca href=\"https://github.com/WICG/webpackage/pull/383\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/WICG/webpackage/pull/383/hovercard\"\u003eWICG/webpackage#383\u003c/a\u003e) and\nrestart amppkg (per\n\u003ca href=\"https://github.com/ampproject/amppackager/issues/93\" data-hovercard-type=\"issue\" data-hovercard-url=\"/ampproject/amppackager/issues/93/hovercard\"\u003e#93\u003c/a\u003e).\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eKeep amppkg updated from \u003ccode\u003ereleases\u003c/code\u003e (the default branch, so \u003ccode\u003ego get\u003c/code\u003e works)\nabout every ~2 months. The \u003ca href=\"https://github.com/ampproject/wg-caching\"\u003ewg-caching\u003c/a\u003e\nteam will release a new version approximately this often. Soon after each\nrelease, Googlebot will increment the version it requests with\n\u003ccode\u003eAMP-Cache-Transform\u003c/code\u003e. Googlebot will only allow the latest 2-3 versions\n(details are still TBD), so an update is necessary but not immediately. If\namppkg doesn't support the requested version range, it will fall back to\nserving unsigned AMP.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTo keep subscribed to releases, you can select \"Releases only\" from the\n\"Watch\" dropdown in GitHub, or use \u003ca href=\"https://stackoverflow.com/questions/9845655/how-do-i-get-notifications-for-commits-to-a-repository\" rel=\"nofollow\"\u003evarious tools\u003c/a\u003e\nto subscribe to the \u003ccode\u003ereleases\u003c/code\u003e branch.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp dir=\"auto\"\u003eYou may also want to:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eLaunch \u003ccode\u003eamppkg\u003c/code\u003e as a restricted user.\u003c/li\u003e\n\u003cli\u003eSave its stdout to a rotated log somewhere.\u003c/li\u003e\n\u003cli\u003eUse the \u003ca href=\"https://amp.dev/documentation/guides-and-tutorials/learn/validation-workflow/validate_amp/\" rel=\"nofollow\"\u003eprovided tools\u003c/a\u003e\nto verify that your published AMP documents are valid, for instance just\nbefore publication, or with a regular audit of a sample of documents. The\n\u003ca href=\"/ampproject/amppackager/blob/releases/transformer\"\u003etransforms\u003c/a\u003e are designed to work on valid AMP pages, and\nmay break invalid AMP in small ways.\u003c/li\u003e\n\u003cli\u003eSetup\n\u003ca href=\"#monitoring-amppackager-in-production-via-its-prometheus-endpoints\"\u003emonitoring\u003c/a\u003e\nof \u003ccode\u003eamppackager\u003c/code\u003e and related requests to AMP document server.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp dir=\"auto\"\u003eOnce you've done the above, you should be able to test by launching Chrome\nwithout any command line flags. To test by visiting the packager URL directly,\nfirst add a Chrome extension to send an \u003ccode\u003eAMP-Cache-Transform: any\u003c/code\u003e request\nheader. Otherwise, follow the above \"Demonstrate privacy-preserving prefetch\"\ninstructions.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch5 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eSecurity Considerations\u003c/h5\u003e\u003ca id=\"user-content-security-considerations\" class=\"anchor\" aria-label=\"Permalink: Security Considerations\" href=\"#security-considerations\"\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\"\u003eSigned exchanges come with some \u003ca href=\"https://wicg.github.io/webpackage/draft-yasskin-http-origin-signed-responses.html#security-considerations\" rel=\"nofollow\"\u003esecurity\nconsiderations\u003c/a\u003e\nthat publishers should consider. A starting list of recommendations based on\nthat:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eUse different keys for the signed exchange cert and the TLS cert.\u003c/li\u003e\n\u003cli\u003eOnly sign public content that's OK to be shared with crawlers.\u003c/li\u003e\n\u003cli\u003eDon't sign personalized content. (It's OK to sign content that includes\nstatic JS that adds personalization at runtime.)\u003c/li\u003e\n\u003cli\u003eBe careful when signing inline JS; if it includes a vulnerability, it may be\npossible for attackers to exploit it without intercepting the network path,\nfor up to 7 days.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eTesting productionization without a valid certificate\u003c/h4\u003e\u003ca id=\"user-content-testing-productionization-without-a-valid-certificate\" class=\"anchor\" aria-label=\"Permalink: Testing productionization without a valid certificate\" href=\"#testing-productionization-without-a-valid-certificate\"\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\"\u003eIt is possible to test an otherwise fully production configuration without\nobtaining a certificate with the \u003ccode\u003eCanSignHttpExchanges\u003c/code\u003e extension. \u003ccode\u003eamppkg\u003c/code\u003e\nstill needs to perform OCSP verification, so the Issuer CA must be valid (i.e.\nno self-signed certificates). e.g. You can use a certificate from \u003ca href=\"https://letsencrypt.org/\" rel=\"nofollow\"\u003eLet's\nEncrypt\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eRunning \u003ccode\u003eamppkg\u003c/code\u003e with the \u003ccode\u003e-invalidcert\u003c/code\u003e flag will skip the check for\n\u003ccode\u003eCanSignHttpExchanges\u003c/code\u003e. This flag is not necessary when using the\n\u003ccode\u003e-development\u003c/code\u003e flag.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eChrome can be configured to allow these invalid certificates with the\n\u003ccode\u003e--ignore-certificate-errors-spki-list\u003c/code\u003e command line flag:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"google-chrome --ignore-certificate-errors-spki-list=\u0026lt;hashes\u0026gt; --user-data-dir=\u0026lt;dir\u0026gt;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003egoogle-chrome --ignore-certificate-errors-spki-list=\u0026lt;hashes\u0026gt; --user-data-dir=\u0026lt;dir\u0026gt;\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ewhere \u003ccode\u003e\u0026lt;hashes\u0026gt;\u003c/code\u003e is a comma separated list of Base64-encoded SHA-256 SPKI\nFingerprints and it is necessary to specify \u003ccode\u003e--user-data-dir\u003c/code\u003e with a valid or\ncreatable directory \u003ccode\u003e\u0026lt;dir\u0026gt;\u003c/code\u003e when \u003ccode\u003e--ignore-certificate-errors-spki-list\u003c/code\u003e is\nused.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAs an example, the hash for a PEM certificate can be obtained with OpenSSL:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"openssl x509 -pubkey -noout -in mycert.crt | openssl pkey -pubin -outform der | openssl sha256 -binary | openssl base64\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eopenssl x509 -pubkey -noout -in mycert.crt | openssl pkey -pubin -outform der | openssl sha256 -binary | openssl base64\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRedundancy\u003c/h4\u003e\u003ca id=\"user-content-redundancy\" class=\"anchor\" aria-label=\"Permalink: Redundancy\" href=\"#redundancy\"\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\"\u003eIf you need to load balance across multiple instances of \u003ccode\u003eamppkg\u003c/code\u003e, you'll want\nyour \u003ccode\u003eOCSPCache\u003c/code\u003e to be backed by a shared storage device (e.g. NFS). It doesn't\nneed to be shared among all instances globally, but perhaps among all instances\nper datacenter. The reason for this is to reduce the number of OCSP requests\n\u003ccode\u003eamppkg\u003c/code\u003e needs to make, per \u003ca href=\"https://gist.github.com/sleevi/5efe9ef98961ecfb4da8\"\u003eOCSP stapling\nrecommendations\u003c/a\u003e.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHow will these web packages be discovered by Google?\u003c/h4\u003e\u003ca id=\"user-content-how-will-these-web-packages-be-discovered-by-google\" class=\"anchor\" aria-label=\"Permalink: How will these web packages be discovered by Google?\" href=\"#how-will-these-web-packages-be-discovered-by-google\"\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\"\u003eGooglebot makes requests with an \u003ccode\u003eAMP-Cache-Transform\u003c/code\u003e header. Responses that\nare \u003ca href=\"/ampproject/amppackager/blob/releases/docs/cache_requirements.md\"\u003eacceptable AMP SXGs\u003c/a\u003e will be eligible for\ndisplay to SXG-supporting browsers, and the HTML payload will be extracted and\neligible for use in the AMP viewer in other browsers.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLimitations\u003c/h3\u003e\u003ca id=\"user-content-limitations\" class=\"anchor\" aria-label=\"Permalink: Limitations\" href=\"#limitations\"\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\"\u003eCurrently, the packager will refuse to sign any AMP documents that hit the size\nlimit of 4MB. You can \u003ca href=\"/ampproject/amppackager/blob/releases/monitoring.md#available-metrics\"\u003emonitor\u003c/a\u003e the size of\nyour documents that have been signed, to see how close you are to the limit.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe packager refuses to sign any URL that results in a redirect. This is by\ndesign, as neither the original URL nor the final URL makes sense as the signed\nURL.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTo account for possible clock skew in user agents, the packager back-dates\npackages by 24h, which means they effectively last only 6 days for most users.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThis tool only packages AMP documents. To sign non-AMP documents, look at the\ncommandline tools on which this was based, at\n\u003ca href=\"https://github.com/WICG/webpackage/tree/master/go/signedexchange\"\u003ehttps://github.com/WICG/webpackage/tree/master/go/signedexchange\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003e\u0026lt;amp-install-serviceworker\u0026gt;\u003c/code\u003e will fail inside of a signed exchange, due to a\n\u003ca href=\"https://bugs.chromium.org/p/chromium/issues/detail?id=939237\" rel=\"nofollow\"\u003eChrome limitation\u003c/a\u003e. The\nrecommendation is to ignore the console error, for now. This is because\namp-install-serviceworker will still succeed in the unsigned AMP viewer case,\nand crawlers may reuse the contents of the signed exchange when displaying an\nAMP viewer to browser versions that don't support SXG.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ccode\u003e\u0026lt;amp-script\u0026gt;\u003c/code\u003e\u003c/h4\u003e\u003ca id=\"user-content-amp-script\" class=\"anchor\" aria-label=\"Permalink: \u0026lt;amp-script\u0026gt;\" href=\"#amp-script\"\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\"\u003eIf you have any inline \u003ccode\u003e\u0026lt;amp-script\u0026gt;\u003c/code\u003es (those with a \u003ccode\u003escript\u003c/code\u003e attribute), then\nthe expiration of the SXG will be set based on the minimum \u003ccode\u003emax-age\u003c/code\u003e of those\n\u003ccode\u003e\u0026lt;amp-script\u0026gt;\u003c/code\u003es, minus one day (due to\n\u003ca href=\"https://github.com/ampproject/amppackager/issues/397\" data-hovercard-type=\"issue\" data-hovercard-url=\"/ampproject/amppackager/issues/397/hovercard\"\u003ebackdating\u003c/a\u003e). If\npossible, prefer external \u003ccode\u003e\u0026lt;amp-script\u0026gt;\u003c/code\u003es (those with a \u003ccode\u003esrc\u003c/code\u003e attribute), which\ndo not have this limitation.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf inline is necessary, you will need to weigh the \u003ca href=\"https://wicg.github.io/webpackage/draft-yasskin-http-origin-signed-responses.html#seccons-downgrades\" rel=\"nofollow\"\u003esecurity\nrisks\u003c/a\u003e\nagainst the \u003ca href=\"/ampproject/amppackager/blob/releases/docs/cache_requirements.md\"\u003eAMP Cache requirement\u003c/a\u003e for a minimum\n\u003ccode\u003emax-age\u003c/code\u003e of \u003ccode\u003e345600\u003c/code\u003e (4 days). For SXGs shorter than that, the Google AMP Cache\nwill treat them as if unsigned (by showing an AMP Viewer).\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHow does \u003ccode\u003eamppackager\u003c/code\u003e process a document it cannot sign?\u003c/h4\u003e\u003ca id=\"user-content-how-does-amppackager-process-a-document-it-cannot-sign\" class=\"anchor\" aria-label=\"Permalink: How does amppackager process a document it cannot sign?\" href=\"#how-does-amppackager-process-a-document-it-cannot-sign\"\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\"\u003ePackager will respond to every request with either a signed document, an\nunsigned document, or an error.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIt will sign every document it can. It may, however, decide not to,\nfor a number of reasons: the certificate may be invalid, the page may not be a\nvalid AMP page, the page may not be an AMP page at all, the page may be 4MB or\nlarger, etc.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf packager cannot sign the document but can fetch it, it will proxy the\ndocument unsigned.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf there was a problem with the gateway fetch request, or with the original\nrequest, packager will respond with an HTTP error, and log the problem to\nstdout.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eYou can monitor the packager's error rates, as well as the rates of signed\nvs unsigned documents, via the tools discussed in the next section.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSpecifically, you can monitor the requests that resulted in a signed or an\nunsigned document via \u003ccode\u003eamppackager_signer_documents_total\u003c/code\u003e metric, and the ones that\nresulted in an error - via \u003ccode\u003eamppackager_http_duration_seconds_count\u003c/code\u003e metric.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch4 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMonitoring \u003ccode\u003eamppackager\u003c/code\u003e in production via its Prometheus endpoints\u003c/h4\u003e\u003ca id=\"user-content-monitoring-amppackager-in-production-via-its-prometheus-endpoints\" class=\"anchor\" aria-label=\"Permalink: Monitoring amppackager in production via its Prometheus endpoints\" href=\"#monitoring-amppackager-in-production-via-its-prometheus-endpoints\"\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\"\u003eOnce you've run the \u003ccode\u003eamppackager\u003c/code\u003e server in production, you may want to\n\u003ca href=\"/ampproject/amppackager/blob/releases/monitoring.md\"\u003emonitor\u003c/a\u003e its health and performance. You may also monitor the\nperformance of the underlying requests to the AMP document server. You can\nmonitor both servers via the \u003ca href=\"https://prometheus.io/\" rel=\"nofollow\"\u003ePrometheus\u003c/a\u003e endpoints\nprovided by \u003ccode\u003eamppackager\u003c/code\u003e. A few examples of questions you can answer:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eIs \u003ccode\u003eamppackager\u003c/code\u003e up and running?\u003c/li\u003e\n\u003cli\u003eHow many requests has it processed since it's been up?\u003c/li\u003e\n\u003cli\u003eWhat was the 0.9 percentile latency of handling those request?\u003c/li\u003e\n\u003cli\u003eHow many of those requests have triggered a gateway request to the\nAMP document server?\u003c/li\u003e\n\u003cli\u003eFor those gateway requests, what was the 0.9 percentile latency of\nthe AMP document server?\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eYou can perform one-off manual health inspections, visualize the real-time\nstats, set up alerts, and more. To learn what are all the things you can\nmonitor, and how to do it, check the \u003ca href=\"/ampproject/amppackager/blob/releases/monitoring.md\"\u003emonitoring manual\u003c/a\u003e.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLocal Transformer\u003c/h2\u003e\u003ca id=\"user-content-local-transformer\" class=\"anchor\" aria-label=\"Permalink: Local Transformer\" href=\"#local-transformer\"\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 local transformer is a library within the AMP Packager that transforms AMP\nHTML for security and performance improvements. Ports of or alternatives to the\nAMP Packager will need to include these transforms.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eMore info \u003ca href=\"/ampproject/amppackager/blob/releases/transformer/README.md\"\u003ehere\u003c/a\u003e.\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"AMP Packager","anchor":"amp-packager","htmlText":"AMP Packager"},{"level":2,"text":"Packager/Signer","anchor":"packagersigner","htmlText":"Packager/Signer"},{"level":3,"text":"How to use","anchor":"how-to-use","htmlText":"How to use"},{"level":4,"text":"Development server","anchor":"development-server","htmlText":"Development server"},{"level":5,"text":"Manual installation","anchor":"manual-installation","htmlText":"Manual installation"},{"level":5,"text":"Docker","anchor":"docker","htmlText":"Docker"},{"level":4,"text":"Test your config","anchor":"test-your-config","htmlText":"Test your config"},{"level":4,"text":"Demonstrate privacy-preserving prefetch","anchor":"demonstrate-privacy-preserving-prefetch","htmlText":"Demonstrate privacy-preserving prefetch"},{"level":4,"text":"Productionizing","anchor":"productionizing","htmlText":"Productionizing"},{"level":5,"text":"Security Considerations","anchor":"security-considerations","htmlText":"Security Considerations"},{"level":4,"text":"Testing productionization without a valid certificate","anchor":"testing-productionization-without-a-valid-certificate","htmlText":"Testing productionization without a valid certificate"},{"level":4,"text":"Redundancy","anchor":"redundancy","htmlText":"Redundancy"},{"level":4,"text":"How will these web packages be discovered by Google?","anchor":"how-will-these-web-packages-be-discovered-by-google","htmlText":"How will these web packages be discovered by Google?"},{"level":3,"text":"Limitations","anchor":"limitations","htmlText":"Limitations"},{"level":4,"text":"\u003camp-script\u003e","anchor":"amp-script","htmlText":"\u0026lt;amp-script\u0026gt;"},{"level":4,"text":"How does amppackager process a document it cannot sign?","anchor":"how-does-amppackager-process-a-document-it-cannot-sign","htmlText":"How does amppackager process a document it cannot sign?"},{"level":4,"text":"Monitoring amppackager in production via its Prometheus endpoints","anchor":"monitoring-amppackager-in-production-via-its-prometheus-endpoints","htmlText":"Monitoring amppackager in production via its Prometheus endpoints"},{"level":2,"text":"Local Transformer","anchor":"local-transformer","htmlText":"Local Transformer"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fampproject%2Famppackager"}},{"displayName":"CODE_OF_CONDUCT.md","repoName":"amppackager","refName":"releases","path":"CODE_OF_CONDUCT.md","preferredFileType":"code_of_conduct","tabName":"Code of 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Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-2"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="This path skips through empty directories" aria-label="deploy/gcloud, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/deploy/gcloud"><span class="react-directory-default-color" data-testid="path-name-segment">deploy/</span><span class="" data-testid="path-name-segment">gcloud</span></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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="This path skips through empty directories" aria-label="deploy/gcloud, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/deploy/gcloud"><span class="react-directory-default-color" data-testid="path-name-segment">deploy/</span><span class="" data-testid="path-name-segment">gcloud</span></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-3"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="docker" aria-label="docker, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/docker">docker</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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="docker" aria-label="docker, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/docker">docker</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-4"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="docs" aria-label="docs, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/docs">docs</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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="docs" aria-label="docs, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/docs">docs</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-5"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="fuzz_httpreq" aria-label="fuzz_httpreq, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/fuzz_httpreq">fuzz_httpreq</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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="fuzz_httpreq" aria-label="fuzz_httpreq, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/fuzz_httpreq">fuzz_httpreq</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-6"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="fuzz_httpresp" aria-label="fuzz_httpresp, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/fuzz_httpresp">fuzz_httpresp</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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="fuzz_httpresp" aria-label="fuzz_httpresp, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/fuzz_httpresp">fuzz_httpresp</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-7"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="This path skips through empty directories" aria-label="internal/url, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/internal/url"><span class="react-directory-default-color" data-testid="path-name-segment">internal/</span><span class="" data-testid="path-name-segment">url</span></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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="This path skips through empty directories" aria-label="internal/url, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/internal/url"><span class="react-directory-default-color" data-testid="path-name-segment">internal/</span><span class="" data-testid="path-name-segment">url</span></a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton 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class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="packager" aria-label="packager, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/packager">packager</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-9"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="This path skips through empty directories" aria-label="testdata/b3, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/testdata/b3"><span class="react-directory-default-color" data-testid="path-name-segment">testdata/</span><span class="" data-testid="path-name-segment">b3</span></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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="This path skips through empty directories" aria-label="testdata/b3, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/testdata/b3"><span class="react-directory-default-color" data-testid="path-name-segment">testdata/</span><span class="" data-testid="path-name-segment">b3</span></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 truncate-for-mobile" id="folder-row-10"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="transformer" aria-label="transformer, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/transformer">transformer</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="icon-directory" 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="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="transformer" aria-label="transformer, (Directory)" class="Link--primary" href="/ampproject/amppackager/tree/releases/transformer">transformer</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div 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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" 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">AMP Packager</h1><a id="user-content-amp-packager" class="anchor" aria-label="Permalink: AMP Packager" href="#amp-packager"><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">AMP Packager is a tool to <a href="https://blog.amp.dev/2018/11/13/developer-preview-of-better-amp-urls-in-google-search/" rel="nofollow">improve AMP URLs</a> by <a href="https://amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/" rel="nofollow">serving AMP using Signed Exchanges</a>. By running it in a proper configuration, web publishers enable origin URLs to appear in AMP search results.</p> <p dir="auto">The AMP Packager works by creating <a href="https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html" rel="nofollow">Signed HTTP Exchanges (SXGs)</a> containing AMP documents, signed with a certificate associated with the origin, with a maximum lifetime of 7 days. The <a href="https://amp.dev/documentation/guides-and-tutorials/learn/amp-caches-and-cors/how_amp_pages_are_cached/" rel="nofollow">Google AMP Cache</a> will fetch, cache, and serve them, similar to what it does for normal AMP HTML documents. When a user loads such an SXG, Chrome validates the signature and then displays the certificate's domain in the URL bar instead of <code>google.com</code>, and treats the web page as though it were on that domain.</p> <p dir="auto">The packager is an HTTP server that sits behind a frontend server; it fetches and signs AMP documents as requested by the AMP Cache.</p> <p dir="auto">As an alternative to running the packager, you can sign up for one of the SXG <a href="https://github.com/ampproject/amppackager/wiki/Service-Providers">service providers</a>.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Packager/Signer</h2><a id="user-content-packagersigner" class="anchor" aria-label="Permalink: Packager/Signer" href="#packagersigner"><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> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">How to use</h3><a id="user-content-how-to-use" class="anchor" aria-label="Permalink: How to use" href="#how-to-use"><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">In all the instructions below, replace <code>amppackageexample.com</code> with a domain you own and can obtain certificates for.</p> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Development server</h4><a id="user-content-development-server" class="anchor" aria-label="Permalink: Development server" href="#development-server"><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> <div class="markdown-heading" dir="auto"><h5 tabindex="-1" class="heading-element" dir="auto">Manual installation</h5><a id="user-content-manual-installation" class="anchor" aria-label="Permalink: Manual installation" href="#manual-installation"><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> <ol dir="auto"> <li> <p dir="auto">Install Go version 1.13 or higher.</p> </li> <li> <p dir="auto">Get amppackager.</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="git clone https://github.com/ampproject/amppackager.git my-amp-directory cd my-amp-directory make build"><pre class="notranslate"><code>git clone https://github.com/ampproject/amppackager.git my-amp-directory cd my-amp-directory make build </code></pre></div> </li> <li> <p dir="auto">Optionally, move the built <code>amppkg</code> wherever you like.</p> </li> <li> <p dir="auto">Prepare a temporary certificate and private key pair to use for signing the exchange when testing your config. Follow WICG <a href="https://github.com/WICG/webpackage/tree/master/go/signedexchange#creating-our-first-signed-exchange">instructions</a> to ensure compliance with the <a href="https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html#cross-origin-cert-req" rel="nofollow">WICG certificate requirements</a>.</p> </li> <li> <p dir="auto">Create a file <code>amppkg.toml</code>. A minimal config looks like this:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="LocalOnly = true CertFile = 'path/to/fullchain.pem' KeyFile = 'path/to/privkey.pem' OCSPCache = '/tmp/amppkg-ocsp' [[URLSet]] [URLSet.Sign] Domain = "amppackageexample.com""><pre class="notranslate"><code>LocalOnly = true CertFile = 'path/to/fullchain.pem' KeyFile = 'path/to/privkey.pem' OCSPCache = '/tmp/amppkg-ocsp' [[URLSet]] [URLSet.Sign] Domain = "amppackageexample.com" </code></pre></div> <p dir="auto">More details can be found in <a href="/ampproject/amppackager/blob/releases/amppkg.example.toml">amppkg.example.toml</a>.</p> </li> <li> <p dir="auto"><code>amppkg -development</code></p> <p dir="auto">If <code>amppkg.toml</code> is not in the current working directory, pass <code>-config=/path/to/amppkg.toml</code>.</p> </li> </ol> <div class="markdown-heading" dir="auto"><h5 tabindex="-1" class="heading-element" dir="auto">Docker</h5><a id="user-content-docker" class="anchor" aria-label="Permalink: Docker" href="#docker"><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">Follow the instructions <a href="/ampproject/amppackager/blob/releases/docker/README.md">here</a> on how to deploy a local Docker container.</p> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Test your config</h4><a id="user-content-test-your-config" class="anchor" aria-label="Permalink: Test your config" href="#test-your-config"><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> <ol dir="auto"> <li>Run Chrome with the following command line flags: <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="alias chrome = [FULL PATH TO CHROME BINARY] PATH_TO_FULLCHAIN_PEM = [FULL PATH TO fullchain.pem] chrome --user-data-dir=/tmp/udd\ --ignore-certificate-errors-spki-list=$(\ openssl x509 -pubkey -noout -in $PATH_TO_FULLCHAIN_PEM |\ openssl pkey -pubin -outform der |\ openssl dgst -sha256 -binary | base64)\ --enable-features=SignedHTTPExchange\ 'data:text/html,<a href="https://localhost:8080/priv/doc/https://amppackageexample.com/">click me'"><pre class="notranslate"><code>alias chrome = [FULL PATH TO CHROME BINARY] PATH_TO_FULLCHAIN_PEM = [FULL PATH TO fullchain.pem] chrome --user-data-dir=/tmp/udd\ --ignore-certificate-errors-spki-list=$(\ openssl x509 -pubkey -noout -in $PATH_TO_FULLCHAIN_PEM |\ openssl pkey -pubin -outform der |\ openssl dgst -sha256 -binary | base64)\ --enable-features=SignedHTTPExchange\ 'data:text/html,<a href="https://localhost:8080/priv/doc/https://amppackageexample.com/">click me' </code></pre></div> </li> <li>Open DevTools. Check 'Preserve log'.</li> <li>Click the <code>click me</code> link.</li> <li>Watch the URL transmogrify! Verify it came from an SXG by switching DevTools to the Network tab and looking in the <code>Size</code> column for <code>(from signed-exchange)</code> and in the <code>Type</code> column for <code>signed-exchange</code>. Click on that row and then click on the Preview tab, to see if there are any errors.</li> </ol> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Demonstrate privacy-preserving prefetch</h4><a id="user-content-demonstrate-privacy-preserving-prefetch" class="anchor" aria-label="Permalink: Demonstrate privacy-preserving prefetch" href="#demonstrate-privacy-preserving-prefetch"><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">This step is optional; just to show how <a href="https://wicg.github.io/webpackage/draft-yasskin-wpack-use-cases.html#private-prefetch" rel="nofollow">privacy-preserving prefetch</a> works with SXGs.</p> <ol dir="auto"> <li><code>go get -u github.com/ampproject/amppackager/cmd/amppkg_dl_sxg</code>.</li> <li><code>amppkg_dl_sxg https://localhost:8080/priv/doc/https://amppackageexample.com/</code></li> <li>Stop <code>amppkg</code> with Ctrl-C.</li> <li><code>go get -u github.com/ampproject/amppackager/cmd/amppkg_test_cache</code>.</li> <li><code>amppkg_test_cache</code></li> <li>Open Chrome and DevTools, as above.</li> <li>Visit <code>https://localhost:8000/</code>. Observe the prefetch of <code>/test.sxg</code>.</li> <li>Click the link. Observe that the cached SXG is used.</li> </ol> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Productionizing</h4><a id="user-content-productionizing" class="anchor" aria-label="Permalink: Productionizing" href="#productionizing"><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">For now, productionizing is a bit manual. The minimum steps are:</p> <ol dir="auto"> <li> <p dir="auto">Don't pass <code>-development</code> flag to <code>amppkg</code>. This causes it to serve HTTP rather than HTTPS, among other changes.</p> </li> <li> <p dir="auto">Don't expose <code>amppkg</code> to the outside world; keep it on your internal network.</p> </li> <li> <p dir="auto">Configure your TLS-serving frontend server to conditionally proxy to <code>amppkg</code>:</p> <ol dir="auto"> <li> <p dir="auto">If the URL starts with <code>/amppkg/</code>, forward the request unmodified.</p> </li> <li> <p dir="auto">If the URL points to an AMP page and the <code>AMP-Cache-Transform</code> request header is present, rewrite the URL by prepending <code>/priv/doc</code> and forward the request.</p> <p dir="auto">NOTE: If using nginx, prefer using <code>proxy_pass</code> with <code>$request_uri</code>, rather than using <code>rewrite</code>, as in <a href="https://github.com/Warashi/try-amppackager/pull/3" data-hovercard-type="pull_request" data-hovercard-url="/Warashi/try-amppackager/pull/3/hovercard">this PR</a>, to avoid percent-encoding issues.</p> </li> <li> <p dir="auto">If at all possible, don't send URLs of non-AMP pages to <code>amppkg</code>; its <a href="/ampproject/amppackager/blob/releases/transformer">transforms</a> may break non-AMP HTML.</p> </li> <li> <p dir="auto">DO NOT forward <code>/priv/doc</code> requests; these URLs are meant to be generated by the frontend server only.</p> </li> </ol> </li> <li> <p dir="auto">For HTTP compliance, ensure the <code>Vary</code> header set to <code>AMP-Cache-Transform, Accept</code> for all URLs that point to an AMP page, irrespective of whether the response is HTML or SXG. (SXG responses that come from <code>amppkg</code> will have the appropriate <code>Vary</code> header set, so it may only be necessary to explicitly set the <code>Vary</code> header for HTML responses.)</p> </li> <li> <p dir="auto">Get an SXG cert from your CA. It must use an EC key with the prime256v1 algorithm, and it must have a <a href="https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html#cross-origin-cert-req" rel="nofollow">CanSignHttpExchanges extension</a>. One provider of SXG certs is <a href="https://www.digicert.com/account/ietf/http-signed-exchange.php" rel="nofollow">DigiCert</a>. You MUST use this in <code>amppkg.toml</code>, and MUST NOT use it in your frontend.</p> </li> <li> <p dir="auto">Every 90 days or sooner, renew your SXG cert (per <a href="https://github.com/WICG/webpackage/pull/383" data-hovercard-type="pull_request" data-hovercard-url="/WICG/webpackage/pull/383/hovercard">WICG/webpackage#383</a>) and restart amppkg (per <a href="https://github.com/ampproject/amppackager/issues/93" data-hovercard-type="issue" data-hovercard-url="/ampproject/amppackager/issues/93/hovercard">#93</a>).</p> </li> <li> <p dir="auto">Keep amppkg updated from <code>releases</code> (the default branch, so <code>go get</code> works) about every ~2 months. The <a href="https://github.com/ampproject/wg-caching">wg-caching</a> team will release a new version approximately this often. Soon after each release, Googlebot will increment the version it requests with <code>AMP-Cache-Transform</code>. Googlebot will only allow the latest 2-3 versions (details are still TBD), so an update is necessary but not immediately. If amppkg doesn't support the requested version range, it will fall back to serving unsigned AMP.</p> <p dir="auto">To keep subscribed to releases, you can select "Releases only" from the "Watch" dropdown in GitHub, or use <a href="https://stackoverflow.com/questions/9845655/how-do-i-get-notifications-for-commits-to-a-repository" rel="nofollow">various tools</a> to subscribe to the <code>releases</code> branch.</p> </li> </ol> <p dir="auto">You may also want to:</p> <ol dir="auto"> <li>Launch <code>amppkg</code> as a restricted user.</li> <li>Save its stdout to a rotated log somewhere.</li> <li>Use the <a href="https://amp.dev/documentation/guides-and-tutorials/learn/validation-workflow/validate_amp/" rel="nofollow">provided tools</a> to verify that your published AMP documents are valid, for instance just before publication, or with a regular audit of a sample of documents. The <a href="/ampproject/amppackager/blob/releases/transformer">transforms</a> are designed to work on valid AMP pages, and may break invalid AMP in small ways.</li> <li>Setup <a href="#monitoring-amppackager-in-production-via-its-prometheus-endpoints">monitoring</a> of <code>amppackager</code> and related requests to AMP document server.</li> </ol> <p dir="auto">Once you've done the above, you should be able to test by launching Chrome without any command line flags. To test by visiting the packager URL directly, first add a Chrome extension to send an <code>AMP-Cache-Transform: any</code> request header. Otherwise, follow the above "Demonstrate privacy-preserving prefetch" instructions.</p> <div class="markdown-heading" dir="auto"><h5 tabindex="-1" class="heading-element" dir="auto">Security Considerations</h5><a id="user-content-security-considerations" class="anchor" aria-label="Permalink: Security Considerations" href="#security-considerations"><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">Signed exchanges come with some <a href="https://wicg.github.io/webpackage/draft-yasskin-http-origin-signed-responses.html#security-considerations" rel="nofollow">security considerations</a> that publishers should consider. A starting list of recommendations based on that:</p> <ul dir="auto"> <li>Use different keys for the signed exchange cert and the TLS cert.</li> <li>Only sign public content that's OK to be shared with crawlers.</li> <li>Don't sign personalized content. (It's OK to sign content that includes static JS that adds personalization at runtime.)</li> <li>Be careful when signing inline JS; if it includes a vulnerability, it may be possible for attackers to exploit it without intercepting the network path, for up to 7 days.</li> </ul> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Testing productionization without a valid certificate</h4><a id="user-content-testing-productionization-without-a-valid-certificate" class="anchor" aria-label="Permalink: Testing productionization without a valid certificate" href="#testing-productionization-without-a-valid-certificate"><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">It is possible to test an otherwise fully production configuration without obtaining a certificate with the <code>CanSignHttpExchanges</code> extension. <code>amppkg</code> still needs to perform OCSP verification, so the Issuer CA must be valid (i.e. no self-signed certificates). e.g. You can use a certificate from <a href="https://letsencrypt.org/" rel="nofollow">Let's Encrypt</a>.</p> <p dir="auto">Running <code>amppkg</code> with the <code>-invalidcert</code> flag will skip the check for <code>CanSignHttpExchanges</code>. This flag is not necessary when using the <code>-development</code> flag.</p> <p dir="auto">Chrome can be configured to allow these invalid certificates with the <code>--ignore-certificate-errors-spki-list</code> command line flag:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="google-chrome --ignore-certificate-errors-spki-list=<hashes> --user-data-dir=<dir>"><pre class="notranslate"><code>google-chrome --ignore-certificate-errors-spki-list=<hashes> --user-data-dir=<dir> </code></pre></div> <p dir="auto">where <code><hashes></code> is a comma separated list of Base64-encoded SHA-256 SPKI Fingerprints and it is necessary to specify <code>--user-data-dir</code> with a valid or creatable directory <code><dir></code> when <code>--ignore-certificate-errors-spki-list</code> is used.</p> <p dir="auto">As an example, the hash for a PEM certificate can be obtained with OpenSSL:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="openssl x509 -pubkey -noout -in mycert.crt | openssl pkey -pubin -outform der | openssl sha256 -binary | openssl base64"><pre class="notranslate"><code>openssl x509 -pubkey -noout -in mycert.crt | openssl pkey -pubin -outform der | openssl sha256 -binary | openssl base64 </code></pre></div> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Redundancy</h4><a id="user-content-redundancy" class="anchor" aria-label="Permalink: Redundancy" href="#redundancy"><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">If you need to load balance across multiple instances of <code>amppkg</code>, you'll want your <code>OCSPCache</code> to be backed by a shared storage device (e.g. NFS). It doesn't need to be shared among all instances globally, but perhaps among all instances per datacenter. The reason for this is to reduce the number of OCSP requests <code>amppkg</code> needs to make, per <a href="https://gist.github.com/sleevi/5efe9ef98961ecfb4da8">OCSP stapling recommendations</a>.</p> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">How will these web packages be discovered by Google?</h4><a id="user-content-how-will-these-web-packages-be-discovered-by-google" class="anchor" aria-label="Permalink: How will these web packages be discovered by Google?" href="#how-will-these-web-packages-be-discovered-by-google"><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">Googlebot makes requests with an <code>AMP-Cache-Transform</code> header. Responses that are <a href="/ampproject/amppackager/blob/releases/docs/cache_requirements.md">acceptable AMP SXGs</a> will be eligible for display to SXG-supporting browsers, and the HTML payload will be extracted and eligible for use in the AMP viewer in other browsers.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Limitations</h3><a id="user-content-limitations" class="anchor" aria-label="Permalink: Limitations" href="#limitations"><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">Currently, the packager will refuse to sign any AMP documents that hit the size limit of 4MB. You can <a href="/ampproject/amppackager/blob/releases/monitoring.md#available-metrics">monitor</a> the size of your documents that have been signed, to see how close you are to the limit.</p> <p dir="auto">The packager refuses to sign any URL that results in a redirect. This is by design, as neither the original URL nor the final URL makes sense as the signed URL.</p> <p dir="auto">To account for possible clock skew in user agents, the packager back-dates packages by 24h, which means they effectively last only 6 days for most users.</p> <p dir="auto">This tool only packages AMP documents. To sign non-AMP documents, look at the commandline tools on which this was based, at <a href="https://github.com/WICG/webpackage/tree/master/go/signedexchange">https://github.com/WICG/webpackage/tree/master/go/signedexchange</a>.</p> <p dir="auto"><code><amp-install-serviceworker></code> will fail inside of a signed exchange, due to a <a href="https://bugs.chromium.org/p/chromium/issues/detail?id=939237" rel="nofollow">Chrome limitation</a>. The recommendation is to ignore the console error, for now. This is because amp-install-serviceworker will still succeed in the unsigned AMP viewer case, and crawlers may reuse the contents of the signed exchange when displaying an AMP viewer to browser versions that don't support SXG.</p> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto"><code><amp-script></code></h4><a id="user-content-amp-script" class="anchor" aria-label="Permalink: <amp-script>" href="#amp-script"><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">If you have any inline <code><amp-script></code>s (those with a <code>script</code> attribute), then the expiration of the SXG will be set based on the minimum <code>max-age</code> of those <code><amp-script></code>s, minus one day (due to <a href="https://github.com/ampproject/amppackager/issues/397" data-hovercard-type="issue" data-hovercard-url="/ampproject/amppackager/issues/397/hovercard">backdating</a>). If possible, prefer external <code><amp-script></code>s (those with a <code>src</code> attribute), which do not have this limitation.</p> <p dir="auto">If inline is necessary, you will need to weigh the <a href="https://wicg.github.io/webpackage/draft-yasskin-http-origin-signed-responses.html#seccons-downgrades" rel="nofollow">security risks</a> against the <a href="/ampproject/amppackager/blob/releases/docs/cache_requirements.md">AMP Cache requirement</a> for a minimum <code>max-age</code> of <code>345600</code> (4 days). For SXGs shorter than that, the Google AMP Cache will treat them as if unsigned (by showing an AMP Viewer).</p> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">How does <code>amppackager</code> process a document it cannot sign?</h4><a id="user-content-how-does-amppackager-process-a-document-it-cannot-sign" class="anchor" aria-label="Permalink: How does amppackager process a document it cannot sign?" href="#how-does-amppackager-process-a-document-it-cannot-sign"><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">Packager will respond to every request with either a signed document, an unsigned document, or an error.</p> <p dir="auto">It will sign every document it can. It may, however, decide not to, for a number of reasons: the certificate may be invalid, the page may not be a valid AMP page, the page may not be an AMP page at all, the page may be 4MB or larger, etc.</p> <p dir="auto">If packager cannot sign the document but can fetch it, it will proxy the document unsigned.</p> <p dir="auto">If there was a problem with the gateway fetch request, or with the original request, packager will respond with an HTTP error, and log the problem to stdout.</p> <p dir="auto">You can monitor the packager's error rates, as well as the rates of signed vs unsigned documents, via the tools discussed in the next section.</p> <p dir="auto">Specifically, you can monitor the requests that resulted in a signed or an unsigned document via <code>amppackager_signer_documents_total</code> metric, and the ones that resulted in an error - via <code>amppackager_http_duration_seconds_count</code> metric.</p> <div class="markdown-heading" dir="auto"><h4 tabindex="-1" class="heading-element" dir="auto">Monitoring <code>amppackager</code> in production via its Prometheus endpoints</h4><a id="user-content-monitoring-amppackager-in-production-via-its-prometheus-endpoints" class="anchor" aria-label="Permalink: Monitoring amppackager in production via its Prometheus endpoints" href="#monitoring-amppackager-in-production-via-its-prometheus-endpoints"><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">Once you've run the <code>amppackager</code> server in production, you may want to <a href="/ampproject/amppackager/blob/releases/monitoring.md">monitor</a> its health and performance. You may also monitor the performance of the underlying requests to the AMP document server. You can monitor both servers via the <a href="https://prometheus.io/" rel="nofollow">Prometheus</a> endpoints provided by <code>amppackager</code>. A few examples of questions you can answer:</p> <ul dir="auto"> <li>Is <code>amppackager</code> up and running?</li> <li>How many requests has it processed since it's been up?</li> <li>What was the 0.9 percentile latency of handling those request?</li> <li>How many of those requests have triggered a gateway request to the AMP document server?</li> <li>For those gateway requests, what was the 0.9 percentile latency of the AMP document server?</li> </ul> <p dir="auto">You can perform one-off manual health inspections, visualize the real-time stats, set up alerts, and more. To learn what are all the things you can monitor, and how to do it, check the <a href="/ampproject/amppackager/blob/releases/monitoring.md">monitoring manual</a>.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Local Transformer</h2><a id="user-content-local-transformer" class="anchor" aria-label="Permalink: Local Transformer" href="#local-transformer"><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 local transformer is a library within the AMP Packager that transforms AMP HTML for security and performance improvements. Ports of or alternatives to the AMP Packager will need to include these transforms.</p> <p dir="auto">More info <a href="/ampproject/amppackager/blob/releases/transformer/README.md">here</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" value="O+z7hrDeVL70oW1e8+2Iq2k8jQ+XdCVIq13JDRdRmGkanX9M1ClFMy/Z1dw0LDaR2p7q1XSE3w+0dnlJvVUnsQ==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> Tool to improve AMP URLs via Signed Exchanges </p> <div class="my-3 d-flex flex-items-center"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link flex-shrink-0 mr-2"> <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> <span class="flex-auto min-width-0 css-truncate css-truncate-target width-fit"> <a title="https://amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/" role="link" target="_blank" rel="noopener noreferrer nofollow" class="text-bold" href="https://amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/">amp.dev/documentation/guides-and-tutorials/optimize-and-measure/signed-exchange/</a> </span> </div> <h3 class="sr-only">Resources</h3> <div class="mt-2"> <a class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:readme"}" href="#readme-ov-file"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-book mr-2"> <path d="M0 1.75A.75.75 0 0 1 .75 1h4.253c1.227 0 2.317.59 3 1.501A3.743 3.743 0 0 1 11.006 1h4.245a.75.75 0 0 1 .75.75v10.5a.75.75 0 0 1-.75.75h-4.507a2.25 2.25 0 0 0-1.591.659l-.622.621a.75.75 0 0 1-1.06 0l-.622-.621A2.25 2.25 0 0 0 5.258 13H.75a.75.75 0 0 1-.75-.75Zm7.251 10.324.004-5.073-.002-2.253A2.25 2.25 0 0 0 5.003 2.5H1.5v9h3.757a3.75 3.75 0 0 1 1.994.574ZM8.755 4.75l-.004 7.322a3.752 3.752 0 0 1 1.992-.572H14.5v-9h-3.495a2.25 2.25 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0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"></path> </svg> Apache-2.0 license </a> </div> <h3 class="sr-only">Code of conduct</h3> <div class="mt-2"> <a href="#coc-ov-file" class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:code of conduct"}" > <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code-of-conduct mr-2"> <path d="M8.048 2.241c.964-.709 2.079-1.238 3.325-1.241a4.616 4.616 0 0 1 3.282 1.355c.41.408.757.86.996 1.428.238.568.348 1.206.347 1.968 0 2.193-1.505 4.254-3.081 5.862-1.496 1.526-3.213 2.796-4.249 3.563l-.22.163a.749.749 0 0 1-.895 0l-.221-.163c-1.036-.767-2.753-2.037-4.249-3.563C1.51 10.008.007 7.952.002 5.762a4.614 4.614 0 0 1 1.353-3.407C3.123.585 6.223.537 8.048 2.24Zm-1.153.983c-1.25-1.033-3.321-.967-4.48.191a3.115 3.115 0 0 0-.913 2.335c0 1.556 1.109 3.24 2.652 4.813C5.463 11.898 6.96 13.032 8 13.805c.353-.262.758-.565 1.191-.905l-1.326-1.223a.75.75 0 0 1 1.018-1.102l1.48 1.366c.328-.281.659-.577.984-.887L9.99 9.802a.75.75 0 1 1 1.019-1.103l1.384 1.28c.295-.329.566-.661.81-.995L12.92 8.7l-1.167-1.168c-.674-.671-1.78-.664-2.474.03-.268.269-.538.537-.802.797-.893.882-2.319.843-3.185-.032-.346-.35-.693-.697-1.043-1.047a.75.75 0 0 1-.04-1.016c.162-.191.336-.401.52-.623.62-.748 1.356-1.637 2.166-2.417Zm7.112 4.442c.313-.65.491-1.293.491-1.916v-.001c0-.614-.088-1.045-.23-1.385-.143-.339-.357-.633-.673-.949a3.111 3.111 0 0 0-2.218-.915c-1.092.003-2.165.627-3.226 1.602-.823.755-1.554 1.637-2.228 2.45l-.127.154.562.566a.755.755 0 0 0 1.066.02l.794-.79c1.258-1.258 3.312-1.31 4.594-.032.396.394.792.791 1.173 1.173Z"></path> </svg> Code of conduct </a> </div> <include-fragment src="/ampproject/amppackager/hovercards/citation/sidebar_partial?tree_name=releases"> </include-fragment> <div class="mt-2"> <a href="/ampproject/amppackager/activity" data-view-component="true" class="Link Link--muted"> <svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-pulse mr-2"> <path d="M6 2c.306 0 .582.187.696.471L10 10.731l1.304-3.26A.751.751 0 0 1 12 7h3.25a.75.75 0 0 1 0 1.5h-2.742l-1.812 4.528a.751.751 0 0 1-1.392 0L6 4.77 4.696 8.03A.75.75 0 0 1 4 8.5H.75a.75.75 0 0 1 0-1.5h2.742l1.812-4.529A.751.751 0 0 1 6 2Z"></path> </svg> <span class="color-fg-muted">Activity</span> </a> </div> <div class="mt-2"> <a href="/ampproject/amppackager/custom-properties" data-view-component="true" class="Link Link--muted"> <svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-note mr-2"> <path d="M0 3.75C0 2.784.784 2 1.75 2h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 14H1.75A1.75 1.75 0 0 1 0 12.25Zm1.75-.25a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-8.5a.25.25 0 0 0-.25-.25ZM3.5 6.25a.75.75 0 0 1 .75-.75h7a.75.75 0 0 1 0 1.5h-7a.75.75 0 0 1-.75-.75Zm.75 2.25h4a.75.75 0 0 1 0 1.5h-4a.75.75 0 0 1 0-1.5Z"></path> </svg> <span class="color-fg-muted">Custom properties</span> </a> </div> <h3 class="sr-only">Stars</h3> <div class="mt-2"> <a href="/ampproject/amppackager/stargazers" data-view-component="true" class="Link Link--muted"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star mr-2"> <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg> <strong>140</strong> stars </a> </div> <h3 class="sr-only">Watchers</h3> <div class="mt-2"> <a href="/ampproject/amppackager/watchers" data-view-component="true" class="Link Link--muted"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-eye mr-2"> <path d="M8 2c1.981 0 3.671.992 4.933 2.078 1.27 1.091 2.187 2.345 2.637 3.023a1.62 1.62 0 0 1 0 1.798c-.45.678-1.367 1.932-2.637 3.023C11.67 13.008 9.981 14 8 14c-1.981 0-3.671-.992-4.933-2.078C1.797 10.83.88 9.576.43 8.898a1.62 1.62 0 0 1 0-1.798c.45-.677 1.367-1.931 2.637-3.022C4.33 2.992 6.019 2 8 2ZM1.679 7.932a.12.12 0 0 0 0 .136c.411.622 1.241 1.75 2.366 2.717C5.176 11.758 6.527 12.5 8 12.5c1.473 0 2.825-.742 3.955-1.715 1.124-.967 1.954-2.096 2.366-2.717a.12.12 0 0 0 0-.136c-.412-.621-1.242-1.75-2.366-2.717C10.824 4.242 9.473 3.5 8 3.5c-1.473 0-2.825.742-3.955 1.715-1.124.967-1.954 2.096-2.366 2.717ZM8 10a2 2 0 1 1-.001-3.999A2 2 0 0 1 8 10Z"></path> </svg> <strong>17</strong> watching </a> </div> <h3 class="sr-only">Forks</h3> <div class="mt-2"> <a href="/ampproject/amppackager/forks" data-view-component="true" class="Link Link--muted"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg> <strong>55</strong> forks </a> </div> <div class="mt-2"> <a class="Link--muted" href="/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fampproject%2Famppackager&report=ampproject+%28user%29"> Report repository </a> </div> </div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame"> <a href="/ampproject/amppackager/releases" data-view-component="true" class="Link--primary no-underline Link"> Releases <span title="7" data-view-component="true" class="Counter">7</span> </a></h2> <a class="Link--primary d-flex no-underline" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/ampproject/amppackager/releases/tag/v8"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-tag flex-shrink-0 mt-1 color-fg-success"> <path d="M1 7.775V2.75C1 1.784 1.784 1 2.75 1h5.025c.464 0 .91.184 1.238.513l6.25 6.25a1.75 1.75 0 0 1 0 2.474l-5.026 5.026a1.75 1.75 0 0 1-2.474 0l-6.25-6.25A1.752 1.752 0 0 1 1 7.775Zm1.5 0c0 .066.026.13.073.177l6.25 6.25a.25.25 0 0 0 .354 0l5.025-5.025a.25.25 0 0 0 0-.354l-6.25-6.25a.25.25 0 0 0-.177-.073H2.75a.25.25 0 0 0-.25.25ZM6 5a1 1 0 1 1 0 2 1 1 0 0 1 0-2Z"></path> </svg> <div class="ml-2 min-width-0"> <div class="d-flex"> <span class="css-truncate css-truncate-target text-bold mr-2" style="max-width: none;">v8</span> <span title="Label: Latest" data-view-component="true" class="Label Label--success flex-shrink-0"> Latest </span> </div> <div class="text-small color-fg-muted"><relative-time datetime="2021-08-03T20:52:13Z" class="no-wrap">Aug 3, 2021</relative-time></div> </div> </a> <div data-view-component="true" class="mt-3"> <a text="small" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/ampproject/amppackager/releases" data-view-component="true" class="Link"> + 6 releases </a></div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3"> <a href="/orgs/ampproject/packages?repo_name=amppackager" data-view-component="true" class="Link--primary no-underline Link d-flex flex-items-center"> Packages <span title="0" hidden="hidden" data-view-component="true" class="Counter ml-1">0</span> </a></h2> <div class="text-small color-fg-muted" > No packages published <br> </div> </div> </div> <div class="BorderGrid-row" hidden> <div class="BorderGrid-cell"> <include-fragment src="/ampproject/amppackager/used_by_list" accept="text/fragment+html"> </include-fragment> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3"> <a href="/ampproject/amppackager/graphs/contributors" data-view-component="true" class="Link--primary no-underline Link d-flex flex-items-center"> Contributors <span title="25" data-view-component="true" class="Counter ml-1">25</span> </a></h2> <include-fragment src="/ampproject/amppackager/contributors_list?count=25&current_repository=amppackager&items_to_show=14" aria-busy="true" aria-label="Loading contributors"> <ul class="list-style-none d-flex flex-wrap mb-n2"> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> <li class="mb-2 "> <div class="Skeleton avatar avatar-user mr-2" style="width:32px;height:32px;"></div> </li> </ul> </include-fragment> <div data-view-component="true" class="mt-3"> <a text="small" href="/ampproject/amppackager/graphs/contributors" data-view-component="true" class="Link--inTextBlock Link"> + 11 contributors </a></div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3">Languages</h2> <div class="mb-2"> <span data-view-component="true" class="Progress"> <span style="background-color:#00ADD8 !important;;width: 96.4%;" itemprop="keywords" aria-label="Go 96.4" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#89e051 !important;;width: 2.3%;" itemprop="keywords" aria-label="Shell 2.3" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#ededed !important;;width: 1.3%;" itemprop="keywords" aria-label="Other 1.3" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> </span></div> <ul class="list-style-none"> <li class="d-inline"> <a class="d-inline-flex flex-items-center flex-nowrap Link--secondary no-underline text-small mr-3" href="/ampproject/amppackager/search?l=go" data-ga-click="Repository, language stats search click, location:repo overview"> <svg style="color:#00ADD8;" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill mr-2"> <path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path> </svg> <span class="color-fg-default text-bold mr-1">Go</span> <span>96.4%</span> </a> </li> <li class="d-inline"> <a class="d-inline-flex flex-items-center flex-nowrap Link--secondary no-underline text-small mr-3" href="/ampproject/amppackager/search?l=shell" data-ga-click="Repository, language stats search click, location:repo overview"> <svg style="color:#89e051;" aria-hidden="true" height="16" 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