Class: Rack::ShowStatus
- Inherits:
-
Object
- Object
- Rack::ShowStatus
- Defined in:
- lib/rack/show_status.rb
Overview
Rack::ShowStatus catches all empty responses and replaces them with a site explaining the error.
Additional details can be put into rack.showstatus.detail
and will be shown as HTML. If such details exist, the error page is always rendered, even if the reply was not empty.
Constant Summary collapse
- TEMPLATE =
adapted from Django <www.djangoproject.com> Copyright © Django Software Foundation and individual contributors. Used under the modified BSD license: www.xfree86.org/3.3.6/COPYRIGHT2.html#5
<<'HTML' <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title><%=h message %> at <%=h req.script_name + req.path_info %></title> <meta name="robots" content="NONE,NOARCHIVE" /> <style type="text/css"> html * { padding:0; margin:0; } body * { padding:10px 20px; } body * * { padding:0; } body { font:small sans-serif; background:#eee; } body>div { border-bottom:1px solid #ddd; } h1 { font-weight:normal; margin-bottom:.4em; } h1 span { font-size:60%; color:#666; font-weight:normal; } table { border:none; border-collapse: collapse; width:100%; } td, th { vertical-align:top; padding:2px 3px; } th { width:12em; text-align:right; color:#666; padding-right:.5em; } #info { background:#f6f6f6; } #info ol { margin: 0.5em 4em; } #info ol li { font-family: monospace; } #summary { background: #ffc; } #explanation { background:#eee; border-bottom: 0px none; } </style> </head> <body> <div id="summary"> <h1><%=h message %> <span>(<%= status.to_i %>)</span></h1> <table class="meta"> <tr> <th>Request Method:</th> <td><%=h req.request_method %></td> </tr> <tr> <th>Request URL:</th> <td><%=h req.url %></td> </tr> </table> </div> <div id="info"> <p><%=h detail %></p> </div> <div id="explanation"> <p> You're seeing this error because you use <code>Rack::ShowStatus</code>. </p> </div> </body> </html> HTML
Instance Method Summary collapse
- #call(env) ⇒ Object
-
#h(obj) ⇒ Object
:nodoc:.
-
#initialize(app) ⇒ ShowStatus
constructor
A new instance of ShowStatus.
Constructor Details
#initialize(app) ⇒ ShowStatus
Returns a new instance of ShowStatus.
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# File 'lib/rack/show_status.rb', line 19 def initialize(app) @app = app @template = ERB.new(TEMPLATE) end |
Instance Method Details
#call(env) ⇒ Object
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# File 'lib/rack/show_status.rb', line 24 def call(env) status, headers, body = response = @app.call(env) empty = headers[CONTENT_LENGTH].to_i <= 0 # client or server error, or explicit message if (status.to_i >= 400 && empty) || env[RACK_SHOWSTATUS_DETAIL] # This double assignment is to prevent an "unused variable" warning. # Yes, it is dumb, but I don't like Ruby yelling at me. req = req = Rack::Request.new(env) = Rack::Utils::HTTP_STATUS_CODES[status.to_i] || status.to_s # This double assignment is to prevent an "unused variable" warning. # Yes, it is dumb, but I don't like Ruby yelling at me. detail = detail = env[RACK_SHOWSTATUS_DETAIL] || html = @template.result(binding) size = html.bytesize response[2] = Rack::BodyProxy.new([html]) do body.close if body.respond_to?(:close) end headers[CONTENT_TYPE] = "text/html" headers[CONTENT_LENGTH] = size.to_s end response end |