Proxy 1.0

import os,socket, sys
import thread

_port = 0 #The port the script should listen on.
_bufferSize = 4096 #max buffer size.
_maxCon = 5 #max incoming connections
try:
    _port = int(raw_input("Insert the port number :> "))
except KeyboardInterrupt:
    print "\n Exiting Script"
    sys.exit(0)

print "You've selected this config: \n\t port: %s \n\t buffer: %s" %(str(_port), str(_bufferSize))
print "END CONFIGURATION"

def start():
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #initiate a new socket
        sock.bind(('', _port))
        sock.listen(_maxCon)
        print "Socket initialized correctly \n Binding successful \n Server started successfully"
    except Exception, e:
        print "unable to initiate socket"
        print("exiting ...")
        sys.exit(2)

    while 1:
        try:
            conn, addr = sock.accept() #accept connection from client browser
            print "serving: %s" %(str(addr))
            data = conn.recv(_bufferSize) #receive client data
            thread.start_new_thread(conn_string, (conn, data, addr)) #starting a new thread
        except KeyboardInterrupt:
            sock.close()
            sys.exit(1)
    sock.close()

def conn_string(conn, data, addr):
    #client browser request processing...
    try:
        print "Connecting.."
        first_line = data.split('\n')[0]
        url = first_line.split(' ')[1]
        print url
        http_pos = url.find("://")

        temp = ''
        if http_pos == -1 :
            temp = url
        else:
            temp = url[(http_pos+3):] #get the whole url

        print temp

        print "calcs.."
        port_pos = temp.find(":") #getting the post position
        webserver_pos = temp.find("/") #getting the web server position
        if webserver_pos == -1:
            webserver_pos = len(temp)

        webserver = ""
        port = -1
        if (port_pos == -1 or webserver_pos < port_pos): #default port
            print ("default port")
            port = 80
            webserver = temp[:webserver_pos]
        else:
            print ("new port")
            port = int((temp[(port_pos+1):])[:webserver_pos - port_pos - 1])
            webserver = temp[:port_pos]

        print "calling proxy"
        proxy_server(webserver, port, conn, addr, data)
    except Exception, e:
        print "fuck"
        pass

def proxy_server(webserver, port, conn, addr, data):
    print "in proxy_server"
    try:
        print "starting socket"
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        print "connecting socket"
        sock.connect((webserver, port))
        print "sending data"
        sock.send(data)

        while 1:
            print "receiving data"
            reply = sock.recv(_bufferSize)

            if(len(reply) > 0):
                print "tada"
                conn.send(reply)
                dar = float(len(reply))
                dar = float(dar / 1024)
                dar = "%.3s" %(str(dar))
                dar = "%s KB" %(dar)
                print "[*] Request Done: %s => %s <= " %(str(addr[0]), str(dar))
            else:
                #connection break
                print "fail... :("
                break
        sock.close()
        conn.close()
    except socket.error, (value, message):
        sock.close()
        conn.close()
        sys.exit(1)


start()