From: Jimmy Thrasher <jjthrash@...>
Date: 2001-09-22T05:10:13+09:00
Subject: [ruby-talk:21500] Re: Speed

If you're not totally adverse to writing in Java, take a look at the
WBI framework (http://www.almaden.ibm.com/cs/wbi), which is free.  It's
designed for that sort of thing.  In fact, if you're willing to spend
a lot of money, look at WebSphere Transcoding Publisher
(http://www.ibm.com/software/webservers/transcoding).  It is based on
WBI, and provides a lot of functionality for modifying the content of
pages (largely for HTML->WML changes and things like that).

You might even be able to write plugins for WBI in Ruby, using this
Java Ruby interpreter.  ;)

Jimmy

David Tillman wrote:
> 
>   Hello all,
> 
>     I would like to speed up the following bit of code if possible.
>     This is sort of a toy proxy server.
> 
>     I initially knocked it together earlier this week when the latest
>     MS IIS exploit was announced.  One thing the offending virus does
>     is attach a javascript command to fetch a "readme.eml" from the
>     infected server.
> 
>     We use squid as a caching proxy server.  This bit of code goes
>     between the client and the proxy server and rewrites pages on the
>     fly.
> 
>     One could have great fun with an unsuspecting victim as you
>     insert their name in place of George Bush, whatever.  My actual
>     intentions were to replace "readme.eml" with something benign.
>     It also works quite well as a banner-ad killer.
> 
>     With a little effort it could also be made to cache pages and
>     retrieve pages directly.  As I already have squid for that I
>     didn't want to reinvent the wheel.
> 
>     As it stands now the speed is acceptable, but a bit on the slow
>     side.  Is there anything I can do to optimize? (besides turning
>     off the debug info)
> 
>     -Dave
> 
> #!/usr/local/bin/ruby
> 
> require 'tempfile'
> require 'socket'
> 
> Rproxy_port = 3031
> Squid_port = 3128
> Host = '172.16.16.13'
> 
> server = TCPServer.new(Host, Rproxy_port)
> 
> while TRUE
> 
>   Thread.new(session = server.accept) { |my_session|
>     puts "***Thread count: #{Thread.list.length}"
>     puts "***#{Thread.current}: Accepted connection from client."
> 
>     squid = TCPSocket.new(Host, Squid_port)
>     puts "***#{Thread.current}: Opened socket to squid."
> 
>     request = my_session.recvfrom(2048)
>     print "***#{Thread.current}: Request: #{request[0]}\n"
> 
>     squid.print(request[0])
>     puts "***#{Thread.current}: Gave request to squid."
> 
> 
>     tf = Tempfile.new("rproxy")
> 
>     answer = squid.recvfrom(1024)
>     while (answer[0].length > 0)
>       tf.print(answer[0])
>       answer = squid.recvfrom(1024)
>     end
> 
>     squid.close
>     puts "***#{Thread.current}: Closed socket to squid."
> 
>     tf.pos = 0
> 
>     headers = {}
>     line = tf.gets("\r\n")
>     while (line != "\r\n")
>       line.chomp!("\r\n")
>       title, data = line.split(/: /)
>       headers[title] = data
>       line = tf.gets
>     end
> 
>     tf.pos = 0
> 
> 
>     if (headers["Content-Type"] == "text/html")
>       while (answer = tf.gets("\r\n"))
>         answer.gsub!(/readme\.eml/, "foo.html")
>         my_session.print answer
>       end
>     else
>       answer = tf.read(1024)
>       while (answer)
>         my_session.print answer
>         answer = tf.read(1024)
>       end
> 
>     end
> 
>     my_session.close
>     puts "***#{Thread.current}: Closed socket to client."
> 
> 
>     tf.close
> 
>     puts "***#{Thread.current}: Content-Type = #{headers['Content-Type']}"
>   }
> 
> 
> end