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require 'rack/utils' require 'nokogiri' module Rack class Codehighlighter include Rack::Utils # for logging use FORMAT = %{%s - [%s] [%s] "%s %s%s %s" (%s) %d %d %0.4f\n} def initialize(app, highlighter = :censor, opts = {}) @app = app @highlighter = highlighter @opts = { :element => "pre", :pattern => /\A:::(\w+)\s*(\n|&#x000A;)/i, # &#x000A; == line feed :reason => "[[-- ugly code removed --]]", #8-) :markdown => false } @opts.merge! opts end def call(env) began_at = Time.now status, headers, response = @app.call(env) headers = HeaderHash.new(headers) if !STATUS_WITH_NO_ENTITY_BODY.include?(status) && !headers['transfer-encoding'] && headers['content-type'] && headers['content-type'].include?("text/html") content = "" response.each { |part| content += part } doc = Nokogiri::HTML(content) nodes = doc.search(@opts[:element]) nodes.each do |node| s = node.inner_html || "[++where is the code?++]" if @opts[:markdown] node.parent.swap(send(@highlighter, s)) else node.swap(send(@highlighter, s)) end end body = doc.to_html headers['content-length'] = bytesize(body).to_s log(env, status, headers, began_at) if @opts[:logging] [status, headers, [body]] else [status, headers, response] end end private def log(env, status, headers, began_at) # 127.0.0.1 - [ultraviolet] [10/Oct/2009 12:12:12] "GET /pastie HTTP/1.1" (text/html) 200 512 1.23 now = Time.now logger = env['rack.errors'] logger.write FORMAT % [ env['HTTP_X_FORWARDED_FOR'] || env["REMOTE_ADDR"] || "-", @highlighter, now.strftime("%d/%b/%Y %H:%M:%S"), env["REQUEST_METHOD"], env["PATH_INFO"], env["QUERY_STRING"].empty? ? "" : "?"+env["QUERY_STRING"], env["HTTP_VERSION"], headers["content-type"] || "unknown", status.to_s[0..3], headers['content-length'], now - began_at ] end # simplifies testing def censor(string) "<pre class='censor'>#{@opts[:reason]}</pre>" end def syntax(string) # allow use html instead of xml translate = { 'html' => 'xml', 'c' => 'ansic', 'css' => 'css21', 'sql' => 'sqlite' } lang = 'unknown' refs = @opts[:pattern].match(string) # extract language name if refs lang = refs[1] convertor = ::Syntax::Convertors::HTML.for_syntax translate[lang] convertor.convert(unescape_html(string.sub(@opts[:pattern], "")) || "[=this can'n happen=]") else "<pre>#{string}</pre>" end end def <b style="color:black;background-color:#ffff66">coderay</b>(string) lang = 'unknown' refs = @opts[:pattern].match(string) # extract language name if refs lang = refs[1] str = unescape_html(string.sub(@opts[:pattern], "")) "<pre class='<b style="color:black;background-color:#ffff66">CodeRay</b>'>#{::<b style="color:black;background-color:#ffff66">CodeRay</b>.encoder(:html).encode str, lang}</pre>" else "<pre class='<b style="color:black;background-color:#ffff66">CodeRay</b>'>#{string}</pre>" end end # experimental Javascript highlighter def prettify(string) # prettify uses short names; I want to use full names translate = { 'ruby' => 'rb', 'bash' => 'bsh', 'javascript' => 'js', 'python' => 'py' } lang = 'unknown' refs = @opts[:pattern].match(string) # extract language name if refs lang = refs[1] str = string.sub(@opts[:pattern], "") "<pre class='prettyprint lang-#{translate[lang] || lang}'>#{str}</pre>" else "<pre>#{string}</pre>" end end def pygments_api(string) require 'net/http' require 'uri' lang = 'unknown' refs = @opts[:pattern].match(string) # extract language name if refs lang = refs[1] str = unescape_html(string.sub(@opts[:pattern], "")) req = Net::HTTP.post_form(URI.parse('http://pygments.appspot.com/'), {'lang' => lang, 'code' => str}) "#{req.body}" else "<pre>#{string}</pre>" end end def ultraviolet(string) opts = { :theme => 'dawn', :lines => false, :themes => {} } opts.merge! @opts lang = 'text' refs = @opts[:pattern].match(string) # extract language name if refs lang = refs[1] theme = opts[:themes].collect do |k,v| k if v.include? lang end.compact.first || opts[:theme] str = unescape_html(string.sub(@opts[:pattern], "")) "#{::Uv.parse(str, 'xhtml', lang, opts[:lines], theme)}" else "<pre class='#{opts[:theme]}'>#{string}</pre>" end end def unescape_html(string) string.to_s.gsub(/&#x000A;/i, "\n").gsub("&lt;", '<').gsub("&gt;", '>').gsub("&amp;", '&') end end end

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Highlight as C C++ CSS Clojure Delphi ERb Groovy (beta) HAML HTML JSON Java JavaScript PHP Plain text Python Ruby SQL XML YAML diff code