gistfile1.txt

import sys, itertools


# Supported HTTP methods.

GET = "GET"
POST = "POST"


# A parsed HTTP request.

class Request(object):

    def __init__(self, method, path, protocol, headers):
        self.method = method
        self.path = path
        self.protocol = protocol
        self.headers = headers


# A parser for a HTTP request.

def parse_header(line):
    return (item.strip() for item in line.split(":", 1))

def parse(input):
    lines = iter(input)
    method, path, protocol = next(lines).split()
    headers = dict(parse_header(line) for line in itertools.takewhile(lambda line: line != "", lines))
    return Request(method, path, protocol, headers)  


# Known HTTP status messages.

status_messages = {200: "OK",
                   404: "Not Found",
                   500: "Server Error"}


# A HTTP response.

class HttpResponse(object):

    def __init__(self, code, body):
        self.code = code
        self.body = body
        
    def __str__(self):
        return "%i %s\n\n%s" % (self.code, status_messages.get(self.code, ""), self.body)


# Request handler.

def request_handler(request):
    body = "<h1>Result for a %s request to http://%s%s</h1>\n%s" % (request.method, request.headers["Host"], request.path, request.headers)
    return HttpResponse(200, body)


# Main server method used to process a single request.

def processRequest(input):
    return str(request_handler(parse(input)))


if __name__ == "__main__":
    print processRequest(sys.stdin)