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<?xml version="1.0" encoding="US-ASCII"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta content="text/html; charset=US-ASCII" http-equiv="Content-Type" /> <title>Class: Rack::ShowExceptions</title> <link rel="stylesheet" href="../rdoc.css" type="text/css" media="screen" /> <script src="../js/jquery.js" type="text/javascript" charset="utf-8"></script> <script src="../js/thickbox-compressed.js" type="text/javascript" charset="utf-8"></script> <script src="../js/quicksearch.js" type="text/javascript" charset="utf-8"></script> <script src="../js/darkfish.js" type="text/javascript" charset="utf-8"></script> </head> <body id="top" class="class"> <div id="metadata"> <div id="home-metadata"> <div id="home-section" class="section"> <h3 class="section-header"> <a href="../index.html">Home</a> <a href="../index.html#classes">Classes</a> <a href="../index.html#methods">Methods</a> </h3> </div> </div> <div id="file-metadata"> <div id="file-list-section" class="section"> <h3 class="section-header">In Files</h3> <div class="section-body"> <ul> <li><a href="../lib/rack/showexceptions_rb.html?TB_iframe=true&height=550&width=785" class="thickbox" title="lib/rack/showexceptions.rb">lib/rack/showexceptions.rb</a></li> </ul> </div> </div> </div> <div id="class-metadata"> <!-- Parent Class --> <div id="parent-class-section" class="section"> <h3 class="section-header">Parent</h3> <p class="link"><a href="../Object.html">Object</a></p> </div> <!-- Method Quickref --> <div id="method-list-section" class="section"> <h3 class="section-header">Methods</h3> <ul class="link-list"> <li><a href="#method-c-new">::new</a></li> <li><a href="#method-i-call">#call</a></li> <li><a href="#method-i-dump_exception">#dump_exception</a></li> <li><a href="#method-i-prefers_plaintext-3F">#prefers_plaintext?</a></li> <li><a href="#method-i-pretty">#pretty</a></li> </ul> </div> </div> <div id="project-metadata"> <div id="fileindex-section" class="section project-section"> <h3 class="section-header">Files</h3> <ul> <li class="file"><a href="../KNOWN-ISSUES.html">KNOWN-ISSUES</a></li> </ul> </div> <div id="classindex-section" class="section project-section"> <h3 class="section-header">Class/Module Index <span class="search-toggle"><img src="../images/find.png" height="16" width="16" alt="[+]" title="show/hide quicksearch" /></span></h3> <form action="#" method="get" accept-charset="utf-8" class="initially-hidden"> <fieldset> <legend>Quicksearch</legend> <input type="text" name="quicksearch" value="" class="quicksearch-field" /> </fieldset> </form> <ul class="link-list"> <li><a href="../Rack.html">Rack</a></li> <li><a href="../Rack/Auth.html">Rack::Auth</a></li> <li><a href="../Rack/Auth/AbstractHandler.html">Rack::Auth::AbstractHandler</a></li> <li><a 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href="../Rack/ConditionalGet.html">Rack::ConditionalGet</a></li> <li><a href="../Rack/Config.html">Rack::Config</a></li> <li><a href="../Rack/ContentLength.html">Rack::ContentLength</a></li> <li><a href="../Rack/ContentType.html">Rack::ContentType</a></li> <li><a href="../Rack/Deflater.html">Rack::Deflater</a></li> <li><a href="../Rack/Deflater/DeflateStream.html">Rack::Deflater::DeflateStream</a></li> <li><a href="../Rack/Deflater/GzipStream.html">Rack::Deflater::GzipStream</a></li> <li><a href="../Rack/Directory.html">Rack::Directory</a></li> <li><a href="../Rack/ETag.html">Rack::ETag</a></li> <li><a href="../Rack/File.html">Rack::File</a></li> <li><a href="../Rack/ForwardRequest.html">Rack::ForwardRequest</a></li> <li><a href="../Rack/Handler.html">Rack::Handler</a></li> <li><a href="../Rack/Handler/CGI.html">Rack::Handler::CGI</a></li> <li><a href="../Rack/Handler/EventedMongrel.html">Rack::Handler::EventedMongrel</a></li> <li><a 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href="../Rack/Response.html">Rack::Response</a></li> <li><a href="../Rack/Response/Helpers.html">Rack::Response::Helpers</a></li> <li><a href="../Rack/RewindableInput.html">Rack::RewindableInput</a></li> <li><a href="../Rack/RewindableInput/Tempfile.html">Rack::RewindableInput::Tempfile</a></li> <li><a href="../Rack/Runtime.html">Rack::Runtime</a></li> <li><a href="../Rack/Sendfile.html">Rack::Sendfile</a></li> <li><a href="../Rack/Server.html">Rack::Server</a></li> <li><a href="../Rack/Server/Options.html">Rack::Server::Options</a></li> <li><a href="../Rack/Session.html">Rack::Session</a></li> <li><a href="../Rack/Session/Abstract.html">Rack::Session::Abstract</a></li> <li><a href="../Rack/Session/Abstract/ID.html">Rack::Session::Abstract::ID</a></li> <li><a href="../Rack/Session/Abstract/SessionHash.html">Rack::Session::Abstract::SessionHash</a></li> <li><a href="../Rack/Session/Cookie.html">Rack::Session::Cookie</a></li> <li><a href="../Rack/Session/Cookie/Base64.html">Rack::Session::Cookie::Base64</a></li> <li><a href="../Rack/Session/Cookie/Base64/JSON.html">Rack::Session::Cookie::Base64::JSON</a></li> <li><a href="../Rack/Session/Cookie/Base64/Marshal.html">Rack::Session::Cookie::Base64::Marshal</a></li> <li><a href="../Rack/Session/Cookie/Base64/ZipJSON.html">Rack::Session::Cookie::Base64::ZipJSON</a></li> <li><a href="../Rack/Session/Cookie/Identity.html">Rack::Session::Cookie::Identity</a></li> <li><a href="../Rack/Session/Memcache.html">Rack::Session::Memcache</a></li> <li><a href="../Rack/Session/Pool.html">Rack::Session::Pool</a></li> <li><a href="../Rack/ShowExceptions.html">Rack::ShowExceptions</a></li> <li><a href="../Rack/ShowStatus.html">Rack::ShowStatus</a></li> <li><a href="../Rack/Static.html">Rack::Static</a></li> <li><a href="../Rack/TempfileReaper.html">Rack::TempfileReaper</a></li> <li><a href="../Rack/URLMap.html">Rack::URLMap</a></li> <li><a href="../Rack/Utils.html">Rack::Utils</a></li> <li><a href="../Rack/Utils/Context.html">Rack::Utils::Context</a></li> <li><a href="../Rack/Utils/HeaderHash.html">Rack::Utils::HeaderHash</a></li> <li><a href="../Rack/Utils/InvalidParameterError.html">Rack::Utils::InvalidParameterError</a></li> <li><a href="../Rack/Utils/KeySpaceConstrainedParams.html">Rack::Utils::KeySpaceConstrainedParams</a></li> <li><a href="../Rack/Multipart.html">Rack::Utils::Multipart</a></li> <li><a href="../Rack/Utils/OkJson.html">Rack::Utils::OkJson</a></li> <li><a href="../Rack/Utils/OkJson/Error.html">Rack::Utils::OkJson::Error</a></li> <li><a href="../Rack/Utils/OkJson/Utf8Error.html">Rack::Utils::OkJson::Utf8Error</a></li> <li><a href="../Rack/Utils/ParameterTypeError.html">Rack::Utils::ParameterTypeError</a></li> <li><a href="../FCGI.html">FCGI</a></li> <li><a href="../FCGI/Stream.html">FCGI::Stream</a></li> <li><a href="../WEBrick.html">WEBrick</a></li> <li><a href="../WEBrick/HTTPResponse.html">WEBrick::HTTPResponse</a></li> <li><a href="../Object.html">Object</a></li> </ul> <div id="no-class-search-results" style="display: none;">No matching classes.</div> </div> </div> </div> <div id="documentation"> <h1 class="class">Rack::ShowExceptions</h1> <div id="description" class="description"> <p><a href="ShowExceptions.html">Rack::ShowExceptions</a> catches all exceptions raised from the app it wraps. It shows a useful backtrace with the sourcefile and clickable context, the whole <a href="../Rack.html">Rack</a> environment and the request data.</p> <p>Be careful when you use this on public-facing sites as it could reveal information helpful to attackers.</p> </div><!-- description --> <div id="5Buntitled-5D" class="documentation-section"> <!-- Constants --> <div id="constants-list" class="section"> <h3 class="section-header">Constants</h3> <dl> <dt><a name="CONTEXT">CONTEXT</a></dt> <dd class="description"></dd> </dl> </div> <!-- Methods --> <div id="public-class-method-details" class="method-section section"> <h3 class="section-header">Public Class Methods</h3> <div id="new-method" class="method-detail "> <a name="method-c-new"></a> <div class="method-heading"> <span class="method-name">new</span><span class="method-args">(app)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <div class="method-source-code" id="new-source"> <pre> <span class="ruby-comment"># File lib/rack/showexceptions.rb, line 18</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">app</span>) <span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span> <span class="ruby-ivar">@template</span> = <span class="ruby-constant">ERB</span>.<span class="ruby-identifier">new</span>(<span class="ruby-constant">TEMPLATE</span>) <span class="ruby-keyword">end</span></pre> </div><!-- new-source --> </div> </div><!-- new-method --> </div><!-- public-class-method-details --> <div id="public-instance-method-details" class="method-section section"> <h3 class="section-header">Public Instance Methods</h3> <div id="call-method" class="method-detail "> <a name="method-i-call"></a> <div class="method-heading"> <span class="method-name">call</span><span class="method-args">(env)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <div class="method-source-code" id="call-source"> <pre> <span class="ruby-comment"># File lib/rack/showexceptions.rb, line 23</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>) <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>) <span class="ruby-keyword">rescue</span> <span class="ruby-constant">StandardError</span>, <span class="ruby-constant">LoadError</span>, <span class="ruby-constant">SyntaxError</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">e</span> <span class="ruby-identifier">exception_string</span> = <span class="ruby-identifier">dump_exception</span>(<span class="ruby-identifier">e</span>) <span class="ruby-identifier">env</span>[<span class="ruby-string">"rack.errors"</span>].<span class="ruby-identifier">puts</span>(<span class="ruby-identifier">exception_string</span>) <span class="ruby-identifier">env</span>[<span class="ruby-string">"rack.errors"</span>].<span class="ruby-identifier">flush</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">accepts_html?</span>(<span class="ruby-identifier">env</span>) <span class="ruby-identifier">content_type</span> = <span class="ruby-string">"text/html"</span> <span class="ruby-identifier">body</span> = <span class="ruby-identifier">pretty</span>(<span class="ruby-identifier">env</span>, <span class="ruby-identifier">e</span>) <span class="ruby-keyword">else</span> <span class="ruby-identifier">content_type</span> = <span class="ruby-string">"text/plain"</span> <span class="ruby-identifier">body</span> = <span class="ruby-identifier">exception_string</span> <span class="ruby-keyword">end</span> [ <span class="ruby-value">500</span>, { <span class="ruby-constant">CONTENT_TYPE</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">content_type</span>, <span class="ruby-constant">CONTENT_LENGTH</span> =<span class="ruby-operator">></span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Utils</span>.<span class="ruby-identifier">bytesize</span>(<span class="ruby-identifier">body</span>).<span class="ruby-identifier">to_s</span>, }, [<span class="ruby-identifier">body</span>], ] <span class="ruby-keyword">end</span></pre> </div><!-- call-source --> </div> </div><!-- call-method --> <div id="dump_exception-method" class="method-detail "> <a name="method-i-dump_exception"></a> <div class="method-heading"> <span class="method-name">dump_exception</span><span class="method-args">(exception)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <div class="method-source-code" id="dump_exception-source"> <pre> <span class="ruby-comment"># File lib/rack/showexceptions.rb, line 58</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">dump_exception</span>(<span class="ruby-identifier">exception</span>) <span class="ruby-identifier">string</span> = <span class="ruby-node">"#{exception.class}: #{exception.message}\n"</span> <span class="ruby-identifier">string</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">exception</span>.<span class="ruby-identifier">backtrace</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">l</span><span class="ruby-operator">|</span> <span class="ruby-node">"\t#{l}"</span> }.<span class="ruby-identifier">join</span>(<span class="ruby-string">"\n"</span>) <span class="ruby-identifier">string</span> <span class="ruby-keyword">end</span></pre> </div><!-- dump_exception-source --> </div> </div><!-- dump_exception-method --> <div id="prefers_plaintext-3F-method" class="method-detail "> <a name="method-i-prefers_plaintext-3F"></a> <div class="method-heading"> <span class="method-name">prefers_plaintext?</span><span class="method-args">(env)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <div class="method-source-code" id="prefers_plaintext-3F-source"> <pre> <span class="ruby-comment"># File lib/rack/showexceptions.rb, line 49</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">prefers_plaintext?</span>(<span class="ruby-identifier">env</span>) <span class="ruby-operator">!</span><span class="ruby-identifier">accepts_html</span>(<span class="ruby-identifier">env</span>) <span class="ruby-keyword">end</span></pre> </div><!-- prefers_plaintext-3F-source --> </div> </div><!-- prefers_plaintext-3F-method --> <div id="pretty-method" class="method-detail "> <a name="method-i-pretty"></a> <div class="method-heading"> <span class="method-name">pretty</span><span class="method-args">(env, exception)</span> <span class="method-click-advice">click to toggle source</span> </div> <div class="method-description"> <div class="method-source-code" id="pretty-source"> <pre> <span class="ruby-comment"># File lib/rack/showexceptions.rb, line 64</span> <span class="ruby-keyword">def</span> <span class="ruby-identifier">pretty</span>(<span class="ruby-identifier">env</span>, <span class="ruby-identifier">exception</span>) <span class="ruby-identifier">req</span> = <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Request</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">env</span>) <span class="ruby-comment"># This double assignment is to prevent an "unused variable" warning on</span> <span class="ruby-comment"># Ruby 1.9.3. Yes, it is dumb, but I don't like Ruby yelling at me.</span> <span class="ruby-identifier">path</span> = <span class="ruby-identifier">path</span> = (<span class="ruby-identifier">req</span>.<span class="ruby-identifier">script_name</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">req</span>.<span class="ruby-identifier">path_info</span>).<span class="ruby-identifier">squeeze</span>(<span class="ruby-string">"/"</span>) <span class="ruby-comment"># This double assignment is to prevent an "unused variable" warning on</span> <span class="ruby-comment"># Ruby 1.9.3. Yes, it is dumb, but I don't like Ruby yelling at me.</span> <span class="ruby-identifier">frames</span> = <span class="ruby-identifier">frames</span> = <span class="ruby-identifier">exception</span>.<span class="ruby-identifier">backtrace</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">line</span><span class="ruby-operator">|</span> <span class="ruby-identifier">frame</span> = <span class="ruby-constant">OpenStruct</span>.<span class="ruby-identifier">new</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">line</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp">/(.*?):(\d+)(:in `(.*)')?/</span> <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">filename</span> = <span class="ruby-node">$1</span> <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">lineno</span> = <span class="ruby-node">$2</span>.<span class="ruby-identifier">to_i</span> <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">function</span> = <span class="ruby-node">$4</span> <span class="ruby-keyword">begin</span> <span class="ruby-identifier">lineno</span> = <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">lineno</span><span class="ruby-operator">-</span><span class="ruby-value">1</span> <span class="ruby-identifier">lines</span> = <span class="ruby-operator">::</span><span class="ruby-constant">File</span>.<span class="ruby-identifier">readlines</span>(<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">filename</span>) <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">pre_context_lineno</span> = [<span class="ruby-identifier">lineno</span><span class="ruby-operator">-</span><span class="ruby-constant">CONTEXT</span>, <span class="ruby-value">0</span>].<span class="ruby-identifier">max</span> <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">pre_context</span> = <span class="ruby-identifier">lines</span>[<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">pre_context_lineno</span><span class="ruby-operator">...</span><span class="ruby-identifier">lineno</span>] <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">context_line</span> = <span class="ruby-identifier">lines</span>[<span class="ruby-identifier">lineno</span>].<span class="ruby-identifier">chomp</span> <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">post_context_lineno</span> = [<span class="ruby-identifier">lineno</span><span class="ruby-operator">+</span><span class="ruby-constant">CONTEXT</span>, <span class="ruby-identifier">lines</span>.<span class="ruby-identifier">size</span>].<span class="ruby-identifier">min</span> <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">post_context</span> = <span class="ruby-identifier">lines</span>[<span class="ruby-identifier">lineno</span><span class="ruby-operator">+</span><span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-identifier">frame</span>.<span class="ruby-identifier">post_context_lineno</span>] <span class="ruby-keyword">rescue</span> <span class="ruby-keyword">end</span> <span class="ruby-identifier">frame</span> <span class="ruby-keyword">else</span> <span class="ruby-keyword">nil</span> <span class="ruby-keyword">end</span> }.<span class="ruby-identifier">compact</span> <span class="ruby-ivar">@template</span>.<span class="ruby-identifier">result</span>(<span class="ruby-identifier">binding</span>) <span class="ruby-keyword">end</span></pre> </div><!-- pretty-source --> </div> </div><!-- pretty-method --> </div><!-- public-instance-method-details --> </div><!-- 5Buntitled-5D --> </div><!-- documentation --> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> <p><small>Generated with the <a href="http://deveiate.org/projects/Darkfish-Rdoc/">Darkfish Rdoc Generator</a> 2</small>.</p> </div> </body> </html>