365 lines
12 KiB
Ruby
365 lines
12 KiB
Ruby
# frozen_string_literal: true
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require 'rack/show_exceptions'
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module Sinatra
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# Sinatra::ShowExceptions catches all exceptions raised from the app it
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# wraps. It shows a useful backtrace with the sourcefile and clickable
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# context, the whole Rack environment and the request data.
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#
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# Be careful when you use this on public-facing sites as it could reveal
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# information helpful to attackers.
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class ShowExceptions < Rack::ShowExceptions
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@@eats_errors = Object.new
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def @@eats_errors.flush(*) end
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def @@eats_errors.puts(*) end
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def initialize(app)
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@app = app
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end
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def call(env)
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@app.call(env)
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rescue Exception => e
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errors = env['rack.errors']
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env['rack.errors'] = @@eats_errors
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if prefers_plain_text?(env)
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content_type = 'text/plain'
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body = dump_exception(e)
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else
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content_type = 'text/html'
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body = pretty(env, e)
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end
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env['rack.errors'] = errors
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[
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500,
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{
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'Content-Type' => content_type,
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'Content-Length' => body.bytesize.to_s
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},
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[body]
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]
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end
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def template
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TEMPLATE
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end
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private
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def bad_request?(exception)
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Sinatra::BadRequest === exception
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end
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def prefers_plain_text?(env)
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Request.new(env).preferred_type('text/plain', 'text/html') != 'text/html' &&
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[/curl/].index { |item| item =~ env['HTTP_USER_AGENT'] }
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end
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def frame_class(frame)
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if frame.filename =~ %r{lib/sinatra.*\.rb}
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'framework'
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elsif (defined?(Gem) && frame.filename.include?(Gem.dir)) ||
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frame.filename =~ %r{/bin/(\w+)\z}
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'system'
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else
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'app'
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end
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end
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TEMPLATE = ERB.new <<-HTML # :nodoc:
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
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<title><%=h exception.class %> at <%=h path %></title>
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<script type="text/javascript">
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//<!--
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function toggle(id) {
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var pre = document.getElementById("pre-" + id);
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var post = document.getElementById("post-" + id);
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var context = document.getElementById("context-" + id);
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if (pre.style.display == 'block') {
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pre.style.display = 'none';
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post.style.display = 'none';
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context.style.background = "none";
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} else {
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pre.style.display = 'block';
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post.style.display = 'block';
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context.style.background = "#fffed9";
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}
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}
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function toggleBacktrace(){
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var bt = document.getElementById("backtrace");
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var toggler = document.getElementById("expando");
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if (bt.className == 'condensed') {
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bt.className = 'expanded';
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toggler.innerHTML = "(condense)";
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} else {
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bt.className = 'condensed';
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toggler.innerHTML = "(expand)";
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}
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}
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//-->
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</script>
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<style type="text/css" media="screen">
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* {margin: 0; padding: 0; border: 0; outline: 0;}
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div.clear {clear: both;}
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body {background: #EEEEEE; margin: 0; padding: 0;
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font-family: 'Lucida Grande', 'Lucida Sans Unicode',
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'Garuda';}
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code {font-family: 'Lucida Console', monospace;
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font-size: 12px;}
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li {height: 18px;}
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ul {list-style: none; margin: 0; padding: 0;}
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ol:hover {cursor: pointer;}
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ol li {white-space: pre;}
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#explanation {font-size: 12px; color: #666666;
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margin: 20px 0 0 100px;}
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/* WRAP */
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#wrap {width: 1000px; background: #FFFFFF; margin: 0 auto;
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padding: 30px 50px 20px 50px;
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border-left: 1px solid #DDDDDD;
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border-right: 1px solid #DDDDDD;}
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/* HEADER */
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#header {margin: 0 auto 25px auto;}
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#header img {float: left;}
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#header #summary {float: left; margin: 12px 0 0 20px; width:660px;
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font-family: 'Lucida Grande', 'Lucida Sans Unicode';}
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h1 {margin: 0; font-size: 36px; color: #981919;}
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h2 {margin: 0; font-size: 22px; color: #333333;}
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#header ul {margin: 0; font-size: 12px; color: #666666;}
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#header ul li strong{color: #444444;}
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#header ul li {display: inline; padding: 0 10px;}
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#header ul li.first {padding-left: 0;}
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#header ul li.last {border: 0; padding-right: 0;}
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/* BODY */
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#backtrace,
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#get,
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#post,
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#cookies,
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#rack {width: 980px; margin: 0 auto 10px auto;}
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p#nav {float: right; font-size: 14px;}
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/* BACKTRACE */
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a#expando {float: left; padding-left: 5px; color: #666666;
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font-size: 14px; text-decoration: none; cursor: pointer;}
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a#expando:hover {text-decoration: underline;}
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h3 {float: left; width: 100px; margin-bottom: 10px;
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color: #981919; font-size: 14px; font-weight: bold;}
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#nav a {color: #666666; text-decoration: none; padding: 0 5px;}
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#backtrace li.frame-info {background: #f7f7f7; padding-left: 10px;
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font-size: 12px; color: #333333;}
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#backtrace ul {list-style-position: outside; border: 1px solid #E9E9E9;
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border-bottom: 0;}
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#backtrace ol {width: 920px; margin-left: 50px;
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font: 10px 'Lucida Console', monospace; color: #666666;}
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#backtrace ol li {border: 0; border-left: 1px solid #E9E9E9;
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padding: 2px 0;}
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#backtrace ol code {font-size: 10px; color: #555555; padding-left: 5px;}
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#backtrace-ul li {border-bottom: 1px solid #E9E9E9; height: auto;
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padding: 3px 0;}
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#backtrace-ul .code {padding: 6px 0 4px 0;}
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#backtrace.condensed .system,
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#backtrace.condensed .framework {display:none;}
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/* REQUEST DATA */
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p.no-data {padding-top: 2px; font-size: 12px; color: #666666;}
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table.req {width: 980px; text-align: left; font-size: 12px;
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color: #666666; padding: 0; border-spacing: 0;
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border: 1px solid #EEEEEE; border-bottom: 0;
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border-left: 0;
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clear:both}
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table.req tr th {padding: 2px 10px; font-weight: bold;
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background: #F7F7F7; border-bottom: 1px solid #EEEEEE;
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border-left: 1px solid #EEEEEE;}
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table.req tr td {padding: 2px 20px 2px 10px;
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border-bottom: 1px solid #EEEEEE;
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border-left: 1px solid #EEEEEE;}
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/* HIDE PRE/POST CODE AT START */
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.pre-context,
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.post-context {display: none;}
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table td.code {width:750px}
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table td.code div {width:750px;overflow:hidden}
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</style>
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</head>
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<body>
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<div id="wrap">
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<div id="header">
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<img src="<%= env['SCRIPT_NAME'] %>/__sinatra__/500.png" alt="application error" height="161" width="313" />
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<div id="summary">
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<h1><strong><%=h exception.class %></strong> at <strong><%=h path %>
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</strong></h1>
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<h2><%=h exception.message %></h2>
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<ul>
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<li class="first"><strong>file:</strong> <code>
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<%=h frames.first.filename.split("/").last %></code></li>
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<li><strong>location:</strong> <code><%=h frames.first.function %>
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</code></li>
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<li class="last"><strong>line:
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</strong> <%=h frames.first.lineno %></li>
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</ul>
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</div>
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<div class="clear"></div>
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</div>
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<div id="backtrace" class='condensed'>
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<h3>BACKTRACE</h3>
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<p><a href="#" id="expando"
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onclick="toggleBacktrace(); return false">(expand)</a></p>
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<p id="nav"><strong>JUMP TO:</strong>
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<% unless bad_request?(exception) %>
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<a href="#get-info">GET</a>
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<a href="#post-info">POST</a>
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<% end %>
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<a href="#cookie-info">COOKIES</a>
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<a href="#env-info">ENV</a>
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</p>
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<div class="clear"></div>
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<ul id="backtrace-ul">
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<% id = 1 %>
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<% frames.each do |frame| %>
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<% if frame.context_line && frame.context_line != "#" %>
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<li class="frame-info <%= frame_class(frame) %>">
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<code><%=h frame.filename %></code> in
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<code><strong><%=h frame.function %></strong></code>
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</li>
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<li class="code <%= frame_class(frame) %>">
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<% if frame.pre_context %>
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<ol start="<%=h frame.pre_context_lineno + 1 %>"
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class="pre-context" id="pre-<%= id %>"
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onclick="toggle(<%= id %>);">
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<% frame.pre_context.each do |line| %>
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<li class="pre-context-line"><code><%=h line %></code></li>
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<% end %>
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</ol>
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<% end %>
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<ol start="<%= frame.lineno %>" class="context" id="<%= id %>"
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onclick="toggle(<%= id %>);">
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<li class="context-line" id="context-<%= id %>"><code><%=
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h frame.context_line %></code></li>
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</ol>
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<% if frame.post_context %>
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<ol start="<%=h frame.lineno + 1 %>" class="post-context"
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id="post-<%= id %>" onclick="toggle(<%= id %>);">
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<% frame.post_context.each do |line| %>
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<li class="post-context-line"><code><%=h line %></code></li>
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<% end %>
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</ol>
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<% end %>
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<div class="clear"></div>
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</li>
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<% end %>
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<% id += 1 %>
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<% end %>
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</ul>
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</div> <!-- /BACKTRACE -->
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<% unless bad_request?(exception) %>
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<div id="get">
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<h3 id="get-info">GET</h3>
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<% if req.GET and not req.GET.empty? %>
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<table class="req">
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<tr>
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<th>Variable</th>
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<th>Value</th>
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</tr>
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<% req.GET.sort_by { |k, v| k.to_s }.each { |key, val| %>
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<tr>
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<td><%=h key %></td>
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<td class="code"><div><%=h val.inspect %></div></td>
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</tr>
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<% } %>
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</table>
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<% else %>
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<p class="no-data">No GET data.</p>
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<% end %>
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<div class="clear"></div>
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</div> <!-- /GET -->
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<div id="post">
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<h3 id="post-info">POST</h3>
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<% if req.POST and not req.POST.empty? %>
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<table class="req">
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<tr>
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<th>Variable</th>
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<th>Value</th>
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</tr>
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<% req.POST.sort_by { |k, v| k.to_s }.each { |key, val| %>
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<tr>
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<td><%=h key %></td>
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<td class="code"><div><%=h val.inspect %></div></td>
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</tr>
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<% } %>
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</table>
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<% else %>
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<p class="no-data">No POST data.</p>
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<% end %>
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<div class="clear"></div>
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</div> <!-- /POST -->
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<% end %>
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<div id="cookies">
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<h3 id="cookie-info">COOKIES</h3>
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<% unless req.cookies.empty? %>
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<table class="req">
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<tr>
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<th>Variable</th>
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<th>Value</th>
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</tr>
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<% req.cookies.each { |key, val| %>
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<tr>
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<td><%=h key %></td>
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<td class="code"><div><%=h val.inspect %></div></td>
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</tr>
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<% } %>
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</table>
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<% else %>
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<p class="no-data">No cookie data.</p>
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<% end %>
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<div class="clear"></div>
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</div> <!-- /COOKIES -->
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<div id="rack">
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<h3 id="env-info">Rack ENV</h3>
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<table class="req">
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<tr>
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<th>Variable</th>
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<th>Value</th>
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</tr>
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<% env.sort_by { |k, v| k.to_s }.each { |key, val| %>
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<tr>
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<td><%=h key %></td>
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<td class="code"><div><%=h val %></div></td>
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</tr>
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<% } %>
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</table>
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<div class="clear"></div>
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</div> <!-- /RACK ENV -->
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<p id="explanation">You're seeing this error because you have
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enabled the <code>show_exceptions</code> setting.</p>
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</div> <!-- /WRAP -->
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</body>
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</html>
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HTML
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end
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end
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