Help with HTTP Intercepting Proxy in Ruby?
- by Philip
I have the beginnings of an HTTP Intercepting Proxy written in Ruby:
require 'socket' # Get sockets from stdlib
server = TCPServer.open(8080) # Socket to listen on port 8080
loop { # Servers run forever
Thread.start(server.accept) do |client|
puts "** Got connection!"
@output = ""
@host = ""
@port = 80
while line = client.gets
line.chomp!
if (line =~ /^(GET|CONNECT) .*(\.com|\.net):(.*) (HTTP\/1.1|HTTP\/1.0)$/)
@port = $3
elsif (line =~ /^Host: (.*)$/ && @host == "")
@host = $1
end
print line + "\n"
@output += line + "\n"
# This *may* cause problems with not getting full requests,
# but without this, the loop never returns.
break if line == ""
end
if (@host != "")
puts "** Got host! (#{@host}:#{@port})"
out = TCPSocket.open(@host, @port)
puts "** Got destination!"
out.print(@output)
while line = out.gets
line.chomp!
if (line =~ /^<proxyinfo>.*<\/proxyinfo>$/)
# Logic is done here.
end
print line + "\n"
client.print(line + "\n")
end
out.close
end
client.close
end
}
This simple proxy that I made parses the destination out of the HTTP request, then reads the HTTP response and performs logic based on special HTML tags. The proxy works for the most part, but seems to have trouble dealing with binary data and HTTPS connections.
How can I fix these problems?
