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<!DOCTYPE html> <html data-auth="" data-permalink="1" itemscope itemtype="http://schema.org/BlogPosting" lang=ja> <head> <meta charset=utf-8> <title>nginx の rewrite ルールっぽく h2o の mruby でリクエストの rewrite を行う | tech - 氾濫原</title> <meta content="width=device-width,initial-scale=1,maximum-scale=2,user-scalable=yes" name=viewport> <meta content=#000000 name=theme-color> <link href=/feed rel=alternate title=Feed type=application/atom+xml> <link href="https://lowreal.net/2016/04/05/2" rel=canonical> <meta content=unsafe-url name=referrer> <meta content="nginx の rewrite ルールっぽく h2o の mruby でリクエストの rewrite を行う | tech - 氾濫原" property=og:title> <meta content="article" property=og:type> <meta content="https://lowreal.net/2016/04/05/2" property=og:url> <meta content=cho45@lowreal.net property=og:email> <meta content=cho45 property=fb:admins> <link href="/css/style.css" rel=stylesheet> <link href="/css/github.css" rel=stylesheet> <link 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class=entries> <div class=date><a href="/2016/04/05/">2016年 04月 05日</a></div> <article class="tech status-public" data-id="20648" id="post-1459866122" > <header> <h2 itemprop=name><a href="/2016/04/05/2" class=bookmark rel=bookmark itemprop=url>nginx の rewrite ルールっぽく h2o の mruby でリクエストの rewrite を行う</a></h2> <div class=metadata> <a href="/tech/">tech</a> | <time datetime="2016-04-05T14:22:02Z" data-epoch="1459866122" itemprop=datePublished> 23:22 </time> | <div style=display:none> <meta content="/2016/04/05/2" itemprop=mainEntityOfPage itemscope itemtype=https://schema.org/WebPage> このサイトのHTTPS化にあたって nginx で書いていた rewrite のルールを h2o の mruby で処理するように変… <a href=http://www.lowreal.net/ itemprop=url> cho45 </a> <div itemprop=publisher itemscope itemtype=https://schema.org/Organization> <div itemprop=logo itemscope itemtype=https://schema.org/ImageObject> <meta content=https://www.lowreal.net/images/logo.png itemprop=url> <meta content=189 itemprop=width> <meta content=105 itemprop=height> </div> <meta content=cho45 itemprop=name> </div> <meta content="2016-04-05T14:22:02Z" itemprop=datePublished> <meta content="2016-04-13T16:47:03Z" itemprop=dateModified> <div itemprop=image itemscope itemtype=https://schema.org/ImageObject> <meta content=https://www.lowreal.net/images/logo.png itemprop=url> <meta content=189 itemprop=width> <meta content=105 itemprop=height> </div> </div> </div> </header> <div class=content itemprop=articleBody> <a href=https://lowreal.net/2016/04/05/1>このサイトのHTTPS化にあたって</a> nginx で書いていた rewrite のルールを h2o の mruby で処理するように変える必要がありました。しかしベタで書くのも面倒なので、そこそこ機械的な置換ですむような書きかたができるようなライブラリを書いてしのぎました。 <section class=level-1> <h3>mruby.handler</h3> <pre class="code lang-ruby hljs"> paths: "/": proxy.reverse.url: http://localhost:5001 proxy.preserve-host: ON mruby.handler: | require "/srv/www/rewrite_rules.rb" lambda do |env| RewriteRules.rewrite(env) do rewrite '/favicon.ico', '/images/favicon.ico', :break rewrite '/apple-touch-icon.png', '/images/apple-touch-icon.png', :break rewrite %r{^/2005/colors-canvas\.xhtml$}, '/2005/colors-canvas.html', :permanent rewrite %r{^/2005/colors-canvas$}, '/2005/colors-canvas.html', :permanent rewrite %r{^/logs/latest$}, '/', :permanent rewrite %r{^/logs/latest.rdf$}, '/feed', :permanent rewrite %r{^/logs/latest.atom$}, '/feed', :permanent rewrite %r{^/latest\.rdf$}, '/feed', :permanent rewrite %r{^/blog/index\.(rdf|atom)$}, '/feed', :permanent rewrite %r{^/logs(/.+?)(\.(rdf|atom))$}, '/feed', :permanent rewrite %r{^/logs(/.+?)(\.(x?html|xml|txt))?$}, '\1', :permanent rewrite %r{^/blog(/.+?)(\.(x?html|xml|txt))?$}, '\1', :permanent rewrite %r{^/photo$}, '/photo/', :permanent rewrite %r{^/(\d\d\d\d/\d\d(/\d\d)?)$}, '/\1/', :permanent rewrite %r{^/\d\d\d\d/$}, '/', :redirect rewrite %r{^/view-img(/.+?)$}, '\1', :permanent end end</pre> h2o の path はディレクトリの指定しかできないみたいなので (自動的に末尾スラッシュがついたりする)、rewrite で同時にパス決め打ちのディスパッチも行っています。rewrite_rules.rb <pre class="code lang-ruby hljs">class RewriteRules class RewriteRulesException < Exception attr_reader :response def initialize(response) @response = response end end attr_reader :env attr_reader :path def self.rewrite(env, &block) self.new(env).run(&block) end def initialize(env, &block) @env = env @path_orig = "#{env['SCRIPT_NAME']}#{env['PATH_INFO']}" @path = @path_orig.dup end def run(&block) begin instance_eval(&block) if @path != @path_orig return [ 307, { 'x-reproxy-url' => path }, [ ] ] else return [ 399, {}, [ ] ] end rescue RewriteRulesException => e return e.response end end def rewrite(regexp, replace, flag=:continue) if @path.gsub!(regexp, replace) case flag when :redirect raise RewriteRulesException.new([ 302, { 'Location' => @path }, [ ] ]) when :permanent raise RewriteRulesException.new([ 301, { 'Location' => @path }, [ ] ]) when :break raise RewriteRulesException.new([ 307, { 'x-reproxy-url' => @path }, [ ] ]) when :continue # nothing else raise "unsupported flag: #{flag}" end end end end </pre> <pre class="code lang-ruby hljs">require 'rspec' describe RewriteRules do it "should treat :permanent as 302 redirect" do env = { 'PATH_INFO' => '/logs/latest' } expect(RewriteRules.rewrite(env) { rewrite %r{^/logs/latest$}, '/', :permanent rewrite %r{^/logs(/.+?)(\.(x?html|xml|txt))?$}, '\1', :permanent rewrite %r{^/foobar/}, '/bazbaz/' }).to eq( [301, {"Location"=>"/"}, []]) end it "should treat :redirect as 301 redirect" do env = { 'PATH_INFO' => '/logs/piyo.html' } expect(RewriteRules.rewrite(env) { rewrite %r{^/logs/latest$}, '/', :permanent rewrite %r{^/logs(/.+?)(\.(x?html|xml|txt))?$}, '\1', :redirect rewrite %r{^/foobar/}, '/bazbaz/' }).to eq([302, {"Location"=>"/piyo"}, []]) end it "should treat as internal proxy by default" do env = { 'PATH_INFO' => '/foobar/baz' } expect(RewriteRules.rewrite(env) { rewrite %r{^/logs/latest$}, '/', :permanent rewrite %r{^/logs(/.+?)(\.(x?html|xml|txt))?$}, '\1', :permanent rewrite %r{^/foobar/}, '/bazbaz/' }).to eq([307, {"x-reproxy-url"=>"/bazbaz/baz"}, []]) end it "can write logic in dsl" do env = { 'PATH_INFO' => '/foobar/baz', 'XXX' => true, } expect(RewriteRules.rewrite(env) { if env['XXX'] rewrite %r{^/foobar/}, '/bazbaz/' end }).to eq([307, {"x-reproxy-url"=>"/bazbaz/baz"}, []]) env = { 'PATH_INFO' => '/foobar/baz', 'XXX' => false } expect(RewriteRules.rewrite(env) { if env['XXX'] rewrite %r{^/foobar/}, '/bazbaz/' end }).to eq([399, {}, []]) end end</pre> </section> <section class=level-1> <h3>ところで</h3> rewrite ルールが ruby で書けるということは、すなわち自由にテスト可能であることを意味します。Apache の RewriteRule や nginx の rewrite をテストするのはかなり面倒なので、かなり強力で嬉しい感じがします。 </section> <ol itemscope itemtype=http://schema.org/BreadcrumbList><li itemprop=itemListElement itemscope itemtype=http://schema.org/ListItem><a href=/ itemprop=item>トップ</a> <meta content=1 itemprop=position> </li> <li itemprop=itemListElement itemscope itemtype=http://schema.org/ListItem> <a href="/tech/" itemprop=item>tech</a> <meta content=2 itemprop=position> </li> <li itemprop=itemListElement itemscope itemtype=http://schema.org/ListItem> <a href="https://lowreal.net/2016/04/05/2" itemprop=item>nginx の rewrite ルールっぽく h2o の mruby でリクエストの rewrite を行う</a> <meta content=3 itemprop=position> </li> </ol> </div> <div class="content trackbacks"> <h3>このエントリを参照するエントリ</h3> <ul> <li data-id="20651"> <a href="/2016/04/06/3"> 現在の h2o.conf.yaml 今のこのサイトの h2o.conf.yaml です。HTTPS (443) のみを処理しています。HTTP (80) は nginx で受けていて、HTTPS 対応ホストに関しては nginx か… <time datetime="2016-04-06T14:00:08Z" data-epoch="1459951208" itemprop=datePublished> 23:00 </time> </a> </li> </ul> <ul> <li data-id="20988"> <a href="/2016/12/31/1"> 今年やったことを自分で承認する 日記を読みかえしてみたら今年もいろいろやっていた。年末にせめて自分で自分を承認してあげたい。おおまかには高周波関係アンテナアナライザ製作… <time datetime="2016-12-30T15:04:32Z" data-epoch="1483110272" itemprop=datePublished> 00:04 </time> </a> </li> </ul> </div> <div class="content similar-entries"> </div> <div class=social> <a 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