First commit

rubyMinProxy.rb

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+#!/usr/bin/env ruby
+# minimal http 1.0 reverse proxy
+# tested on ruby 1.9 & 2.3
+
+require 'socket'
+# host/ip & port for proxy server
+proxy_addr = 'localhost'
+proxy_port = 8080
+# list of backend servers
+@backend_host = ["97.184.69.111","86.189.8.12,"97.184.66.131" ]
+@remote_port = "80"
+
+puts "HTTP 1.0 PROXY\n\nRunning on #{proxy_addr}:#{proxy_port}\n"
+
+proxy = TCPServer.new(proxy_addr, proxy_port)
+
+def make_request(backend, ip, met,req)
+	socket = TCPSocket.new(backend, @remote_port)
+	socket << "#{met} http://#{backend}#{req} HTTP/1.0\r\n"
+	socket << "Host: #{backend}\r\n"
+	socket << "Add X-Forwarded-For: #{ip}\r\n"
+	socket << "Connection: close\r\n"
+	socket << "\r\n"
+	response = socket.read()
+        socket.close()
+        response
+end
+
+#on TCPSERVER.accept enter loop, start a new thread
+loop do
+	Thread.start(proxy.accept) do |client|
+		# randomly pick a backend server
+		backend = @backend_host[rand(@backend_host.size)]
+		# capture HTTP request
+		data = client.gets.split()
+		method = data[0]
+		uri =  data[1]
+		client_ip = client.peeraddr[2]
+		puts "REQUEST: #{client_ip} -> #{backend}\n"
+                # send request to backend server using the make_request method
+		response = make_request(backend, client_ip, method, uri)
+		header= response.lines.first
+		puts "RESPONSE: #{header}\n\n"
+		# send response and close client connection
+		client.write(response)
+		client.close
+	end
+end