<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Class: ActionController::Failsafe</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <link rel="stylesheet" href="../.././rdoc-style.css" type="text/css" media="screen" /> <script type="text/javascript"> // <![CDATA[ function popupCode( url ) { window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400") } function toggleCode( id ) { if ( document.getElementById ) elem = document.getElementById( id ); else if ( document.all ) elem = eval( "document.all." + id ); else return false; elemStyle = elem.style; if ( elemStyle.display != "block" ) { elemStyle.display = "block" } else { elemStyle.display = "none" } return true; } // Make codeblocks hidden by default document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }</style>" ) // ]]> </script> </head> <body> <div id="classHeader"> <table class="header-table"> <tr class="top-aligned-row"> <td><strong>Class</strong></td> <td class="class-name-in-header">ActionController::Failsafe</td> </tr> <tr class="top-aligned-row"> <td><strong>In:</strong></td> <td> <a href="../../files/lib/action_controller/failsafe_rb.html"> lib/action_controller/failsafe.rb </a> <br /> </td> </tr> <tr class="top-aligned-row"> <td><strong>Parent:</strong></td> <td> <a href="../Object.html"> Object </a> </td> </tr> </table> </div> <!-- banner header --> <div id="bodyContent"> <div id="contextContent"> <div id="description"> <p> The <a href="Failsafe.html">Failsafe</a> middleware is usually the top-most middleware in the Rack middleware chain. It returns the underlying middleware‘s response, but if the underlying middle raises an exception then <a href="Failsafe.html">Failsafe</a> will log the exception into the Rails log file, and will attempt to return an error message response. </p> <p> <a href="Failsafe.html">Failsafe</a> is a last resort for logging errors and for telling the HTTP client that something went wrong. Do not confuse this with the <a href="Rescue.html">ActionController::Rescue</a> module, which is responsible for catching exceptions at deeper levels. Unlike <a href="Failsafe.html">Failsafe</a>, which is as simple as possible, <a href="Rescue.html">Rescue</a> provides features that allow developers to hook into the error handling logic, and can customize the error message response based on the HTTP client‘s IP. </p> </div> </div> <div id="method-list"> <h3 class="section-bar">Methods</h3> <div class="name-list"> <a href="#M000233">call</a> <a href="#M000232">new</a> </div> </div> </div> <!-- if includes --> <div id="section"> <!-- if method_list --> <div id="methods"> <h3 class="section-bar">Public Class methods</h3> <div id="method-M000232" class="method-detail"> <a name="M000232"></a> <div class="method-heading"> <a href="Failsafe.src/M000232.html" target="Code" class="method-signature" onclick="popupCode('Failsafe.src/M000232.html');return false;"> <span class="method-name">new</span><span class="method-args">(app)</span> </a> </div> <div class="method-description"> </div> </div> <h3 class="section-bar">Public Instance methods</h3> <div id="method-M000233" class="method-detail"> <a name="M000233"></a> <div class="method-heading"> <a href="Failsafe.src/M000233.html" target="Code" class="method-signature" onclick="popupCode('Failsafe.src/M000233.html');return false;"> <span class="method-name">call</span><span class="method-args">(env)</span> </a> </div> <div class="method-description"> </div> </div> </div> </div> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> </div> </body> </html>