I have the following code (just as a test) and I want to create an HTTP proxy using EventMachine. The code below is an example on the es-proxy GitHub page. However, when I run this and open up a website that has a moderate amount of images, the images start loading incorrectly. What I mean by this is that some images are loaded twice or if I request my icon for the navigation bar, I instead get the profile picture. This is especially evident if I refresh the page a few times.
It seems that the responses do not correspond to the matching request; causing everything to be jumbled. However, I'm not sure why this is. The code below seems simple enough for this to not be a problem.
require 'rubygems'
require 'em-proxy'
require 'http/parser' # gem install http_parser.rb
require 'uuid' # gem install uuid
# > ruby em-proxy-http.rb
# > curl --proxy localhost:9889 www.google.com
host = "0.0.0.0"
port = 9889
puts "listening on #{host}:#{port}..."
Proxy.start(:host => host, :port => port) do |conn|
@p = Http::Parser.new
@p.on_headers_complete = proc do |h|
session = UUID.generate
puts "New session: #{session} (#{h.inspect})"
host, port = h['Host'].split(':')
conn.server session, :host => host, :port => (port || 80)
conn.relay_to_servers @buffer
@buffer = ''
end
@buffer = ''
conn.on_connect do |data,b|
puts [:on_connect, data, b].inspect
end
conn.on_data do |data|
@buffer << data
@p << data
data
end
conn.on_response do |backend, resp|
#puts [:on_response, backend, resp].inspect
resp
end
conn.on_finish do |backend, name|
puts [:on_finish, name].inspect
end
end
Update
I believe I have insight as to what is happening but, still no way of solving my problem. I am creating a server for each request and when I relay my requests I have multiple servers. Then in the on response I should only be returning the response if it is from the correct server. However, I don't have a way to correlate this as of yet.
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