Returns back exactly what you sent. Requires eventlet.

http_echo.py

import eventlet
import traceback
from eventlet.greenio import socket

CRLF = "\r\n"
CRLF_2 = CRLF * 2

def _handler(sock, addr):
    print "Got client on %s" % (addr,)
    sock.settimeout(10)

    full_data = ""
    headers_done = None
    headers = {}

    while not headers_done:
        data = sock.recv(8192)
        full_data += data
        headers_done = CRLF_2 in full_data

    header_data, body = full_data.split(CRLF_2, 1)
    for line in header_data.split(CRLF, 1)[1:]:
        k, v = line.split(":", 1)
        headers[k] = v

    if 'Content-Length' in headers:
        full_body_length = int(headers['Content-Length'])
        leftover = full_body_length - len(body)
        if leftover > 0:
            full_data += sock.recv(leftover, socket.MSG_WAITALL)

    response = """HTTP/1.1 200 OK\r
Content-Type: text/plain\r
Content-Length: %d\r
\r
%s""" % (len(full_data), full_data)

    sock.sendall(response)
    sock.close()

def handler(sock, addr):
    try:
        _handler(sock, addr)
    except Exception as e:
        traceback.print_exc()
        sock.close()

def main():
    listener = eventlet.listen(('0.0.0.0', 8080))
    eventlet.serve(listener, handler)

if __name__ == '__main__':
    print "Starting up"
    try:
        main()
    except KeyboardInterrupt:
        pass