Python HTTP to HTTPS redirector

Description:

This is a small python script that runs forever, listening for HTTP connections and redirecting them to a specified URL. This was written for the express purpose of redirecting an HTTP connection to an HTTPS server, but will happily redirect to any URL. If the client application does not accept the redirection error code a basic HTML page is delivered which includes directions on how to reach the intended target.

Platform:

no platform specific code, should work anywhere that has Python

Language:

Python

HTML

Demonstrates:

basic python socket handling

http redirection codes

License:

I am placing this code (explicitly the file redirect.py.txt on this website) into the public domain. If you find it useful, I'd like to hear from you. If you build it into a larger application I would appreciate compensation and attribution, but am not requiring either.

Code:

#!/usr/bin/python

from socket import *
from select import *

HOST = ''
PORT = 80
TARGET = "https://www.yourserver.here"

class Connection:
    """
    An accepted connection.
    """
    def __init__(self, socket, address):
        self.socket = socket
        self.ip = address[0]

    def sendline(self, data):
        self.socket.send(data + "\r\n")

    def fileno(self):
        return self.socket.fileno()

class ConnectionHandler:
    """
    Maintains all connections.
    """
    def __init__(self):
        self.listener = socket(AF_INET, SOCK_STREAM)
        self.listener.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
        self.listener.bind((HOST, PORT))
        self.listener.listen(32)
        print "HTTP 302 Redirector is active and listening on port " + `PORT` + "."

    def run(self):
        """
        Listen for incoming connections on PORT.  When a connection is recieved, send a 302
        redirect and then close the socket.
        """
        # Accept an incoming connection.
        conn = select( [self.listener], [], [], 0.1)[0]

        if conn:
            socket, address = self.listener.accept()
            conn = Connection(socket, address)

            # burn some time so that the client and server don't have a timing error
            trash = conn.socket.recv(1024)

            # send our https redirect
            conn.sendline("HTTP/1.1 302 Encryption Required")
            conn.sendline("Location: " + TARGET)
            conn.sendline("Connection: close")
            conn.sendline("Cache-control: private")
            conn.sendline("")
            conn.sendline("<html><body>Encryption Required.  Please go to <a href='" + TARGET + "'>" + TARGET + "</a> for this service.</body></html>")
            conn.sendline("")

            # kick em out
            conn.socket.close

connections = ConnectionHandler()
while 1:
    connections.run()

Source code without formatting