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if Rails.version == '2.3.8' && Gem.available?('mongrel','~>1.1.5')) && self.class.const_defined?(:Mongrel)
# Pulled right from latest rack. Old looked like this in 1.1.0 version.
# def [](k)
# super(@names[k] ||= @names[k.downcase])
# end
module Rack
module Utils
class HeaderHash < Hash
def [](k)
super(@names[k]) if @names[k]
# Code pulled from the ticket above.
class Mongrel::CGIWrapper
def header_with_rails_fix(options = 'text/html')
@head['cookie'] = options.delete('cookie') { |v| v.sub(/^\n/,'') } if options.class != String and options['cookie']
alias_method_chain :header, :rails_fix
# Pulled right from 2.3.8 ActionPack. Simple diff was
# if headers.include?('Set-Cookie')
# headers['cookie'] = headers.delete('Set-Cookie').split("\n")
# end
# to
# if headers['Set-Cookie']
# headers['cookie'] = headers.delete('Set-Cookie').split("\n")
# end
module ActionController
class CGIHandler
def self.dispatch_cgi(app, cgi, out = $stdout)
env = cgi.__send__(:env_table)
cgi.stdinput.extend ProperStream
env["SCRIPT_NAME"] = "" if env["SCRIPT_NAME"] == "/"
"rack.version" => [0,1],
"rack.input" => cgi.stdinput,
"rack.errors" => $stderr,
"rack.multithread" => false,
"rack.multiprocess" => true,
"rack.run_once" => false,
"rack.url_scheme" => ["yes", "on", "1"].include?(env["HTTPS"]) ? "https" : "http"
env["QUERY_STRING"] ||= ""
env["REQUEST_PATH"] ||= "/"
env.delete "PATH_INFO" if env["PATH_INFO"] == ""
status, headers, body =
out.binmode if out.respond_to?(:binmode)
out.sync = false if out.respond_to?(:sync=)
headers['Status'] = status.to_s
if headers['Set-Cookie']
headers['cookie'] = headers.delete('Set-Cookie').split("\n")
body.each { |part|
out.write part
out.flush if out.respond_to?(:flush)
body.close if body.respond_to?(:close)

buntine commented Jul 20, 2010

Hey, thanks for the patch. Rubygems (1.3.5) was complaining about an "illformed requirement", which I fixed by replacing the first line with:

if Rails.version == '2.3.8' && Gem.available?('mongrel', '~>1.1.5') && self.class.const_defined?(:Mongrel)

EDIT: Thanks for the correct fix, bshand.

bshand commented Jul 27, 2010

I "fixed" it for Rubygems 1.3.5 with the following first line:

if Rails.version == '2.3.8' && Gem.available?('mongrel', '~>1.1.5') && self.class.const_defined?(:Mongrel)

stangel commented Oct 28, 2010

This seems to also be a problem in Rails 2.3.9 so I changed the first line to:
if ['2.3.8','2.3.9'].include?( Rails.version ) && Gem.available?('mongrel','~>1.1.5')) && self.class.const_defined?(:Mongrel)

the same with Rails 2.3.10

When I use this above code I am getting undefined method 'alias_method_chain' for #Class:Mongrel::CGIWrapper. I am newbie to rails please help me. Thanks in advance.

stangel commented Dec 2, 2010

Vivek a couple suggestions:

  1. If you're using Rails 3 then alias_method_chain is deprecated, but you shouldn't need this patch on Rails 3.
  2. If you're on a Mac you might try this:

I am using rails 2.3.8 only. But still I am facing this problem.


metaskills commented Dec 3, 2010

@vivek-dhayalan Perhaps you are not loading this file at the right time. I have it in my 2.3.8 app in lib/initializers/mongrel.rb

I have moved my file to location as said and I have added the following two lines in environment.rb

require File.join(File.dirname(File.expand_path(FILE)), '../lib/initializers/mongrel')
config.gem "mongrel"

but, I am getting the same error again.


metaskills commented Dec 3, 2010

Crap, a mistake on my part, I meant config/initializers/mongrel.rb.

Also, do not require the file, rails requires init file automatically.

thanks, it worked.

rca commented Feb 14, 2011

Thanks for the fix. I've put together a patched gist that fixes the issues in the comments below that works for Rails versions ['2.3.8', '2.3.9', '2.3.10', '2.3.11']:


bauerpl commented Mar 12, 2011

Thanks a lot!

tf commented Jun 27, 2011

Solved the problem for me on 2.3.12

Thanks a lot!

im using rails 2.3.10 placed file in config/initializers/mongrel.rb and include version 2.3.10, but still having error:
undefined method `[]' for nil:NilClass

Application trace:

E:/webSAS/webSAS/vendor/plugins/recode_legacy_database/lib/recode_legacy_database.rb:36:in after_initialize' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/callbacks.rb:347:insend'
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/callbacks.rb:347:in callback' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1691:insend'
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1691:in instantiate' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:665:infind_by_sql'
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:665:in collect!' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:665:infind_by_sql'
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1582:in find_every' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1539:infind_initial'
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:617:in find' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1914:infind_by_login'
C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1919:in send' C:/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.10/lib/active_record/base.rb:1919:inmethod_missing_without_paginate'
E:/webSAS/webSAS/vendor/plugins/will_paginate/lib/will_paginate/finder.rb:164:in method_missing' E:/webSAS/webSAS/app/models/user.rb:76:inauthenticate'
E:/webSAS/webSAS/app/controllers/sessions_controller.rb:9:in `create'

Can anyone help?

Thanks in advance

stangel commented Aug 26, 2011

Eduardo, what does E:/webSAS/webSAS/vendor/plugins/recode_legacy_database/lib/recode_legacy_database.rb line 36 look like?

is a plugin that work with encoding utf-8 to iso, its useful for use rails with sqlserver old versions. it converts caracters encoding when saving and loading data from database to ensure that special caracters will be displayed correctly.

fixed problem removing recode_legacy_database, but now trying to solve utf-8 x sqlserver encoding problem

thnks for the tip

Jampire commented Dec 6, 2011

thanks a lot. Working for rails 2.3.14 too.

Worked for me in 2.3.14 as well. Thanks so much!

Thanks a lot! Worked for me in 2.3.15.

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