Class: Waw::ErrorHandler::Backtrace

Inherits:
Object
  • Object
show all
Defined in:
lib/waw/controllers/error/backtrace.rb

Instance Method Summary collapse

Instance Method Details

#call(kernel, ex) ⇒ Object

Shows a page with a friendly presented backtrace for the error that occured



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# File 'lib/waw/controllers/error/backtrace.rb', line 40

def call(kernel, ex)
  backtrace = case ex
    when ::WLang::Error
      ex.wlang_backtrace
    when ::Exception
      ex.backtrace
    else 
      []
  end
  [500, {'Content-Type' => 'text/html'}, ex_to_html(ex, backtrace)]
end

#ex_backtrace_to_html(backtrace) ⇒ Object

Converts a back-trace to a friendly HTML chunck



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# File 'lib/waw/controllers/error/backtrace.rb', line 7

def ex_backtrace_to_html(backtrace)
  "<div>" + backtrace.collect{|s| CGI.escapeHTML(s)}.join('</div><div>') + "</div>"
end

#ex_to_html(ex, backtrace) ⇒ Object

Converts an exception to a friendly HTML chunck



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# File 'lib/waw/controllers/error/backtrace.rb', line 12

def ex_to_html(ex, backtrace)
  <<-EOF
    <html>
      <head>
        <style type="text/css">
          body {
            font-size: 14px;
          	font-family: "Courier", "Arial", sans-serif;
          }
          p.message {
            font-size: 16px;
            font-weight: bold;
          }
        </style>
      </head>
      <body>
        <h1>Internal server error (ruby exception)</h1>
        <p class="message"><code>#{CGI.escapeHTML(ex.message)}</code></p>
        <div style="margin-left:50px;">
          #{ex_backtrace_to_html(backtrace)}
        </div>
      </body>
    </html>
  EOF
end