Class: Rack::EmailErrors

Inherits:
Object show all
Defined in:
lib/kiss/rack/email_errors.rb

Overview

Rack::EmailErrors sends error responses (code 5xx) to email addresses as specified in the Rack::Builder config.

Instance Method Summary collapse

Constructor Details

#initialize(app, *args) ⇒ EmailErrors

Returns a new instance of EmailErrors.



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# File 'lib/kiss/rack/email_errors.rb', line 8

def initialize(app, *args)
  @_app = app
  
  if (options = args.first).is_a?(Hash)
    @_agent = options[:agent]
    @_subject = options[:subject]
    @_from = options[:from]
    @_to = options[:to]
  else
    @_agent, @_subject, @_from, *@_to = *args
  end
  
  @_agent = '/usr/sbin/sendmail -t' if @_agent == :sendmail
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/kiss/rack/email_errors.rb', line 23

def call(env)
  code, headers, body = @_app.call(env)
  
  if code >= 500 && code < 600
    begin # rescue any errors in message composition and sending
      error_type = headers['X-Kiss-Error-Type'] || "#{code} Error"
      error_message = headers['X-Kiss-Error-Message']
      
      message = <<-EOT
Content-type: text/html
From: #{@_from}
To: #{@_to.join(', ')}
Subject: #{@_subject} - #{error_type}#{ error_message ? ": #{error_message}" : ''}

EOT
      
      body.each do |part|
        message += part
      end
      
      if @_agent.is_a?(String)
        IO.popen(@_agent, "w") do |pipe|
          pipe.puts(message)
        end
      else
        require 'net/smtp' unless defined?(Net::SMTP)
        smtp = @_agent.is_a?(Net::SMTP) ? @_agent : Net::SMTP.new('localhost')
        smtp.start do |smtp|
      		smtp.send_message(message, @_from, *@_to)
      	end
    	end
    rescue
    end
    
    body = <<-EOT
<html>
<head>
<title>Error</title>
</head>
<body>
<h1>Application Server Error</h1>
<p>Sorry, an error occurred.  Our technical staff has been notified and will investigate this issue.</p>
</body>
</html>
EOT
    headers['Content-Length'] = body.content_length.to_s
  end
  
  [ code, headers, body ]
end