3to2 porting of the 2to3 porting of the 3to2 porting of https://gist.github.com/berdario/39313b94cd08ebe6b3fb portingception!

dummyhttp.py

#! /usr/bin/env python


from __future__ import with_statement
import sys
import os
import locale
from collections import defaultdict
from socket import socket, AF_INET, SOCK_STREAM
from urlparse import urlparse
from contextlib import closing
from functools import wraps

import magic
from io import open
from itertools import imap


args = dict(enumerate(sys.argv))

encoding_guesser = magic.Magic(mime_encoding=True)

curdir = os.path.abspath(u'.')

ENCODING = locale.getlocale()[1]

HTTP_METHODS = frozenset(set([u'OPTIONS', u'GET', u'HEAD', u'POST', u'PUT', u'DELETE', u'TRACE', u'CONNECT']))

HTTP_VERSION = u'HTTP/1.1'

def parse_path(f):
    @wraps(f)
    def handler(resource, headers):
        resource = resource.decode()
        if not resource.startswith(u'/'):
            resource = urlparse(resource).path or u'/'
        resource = os.path.abspath(resource[1:] or u'.')
        if not resource.startswith(curdir):
            resource = curdir
        return f(resource, headers)
    return handler

def guess_type(path):
    typ = magic.from_file(path, mime=True).decode()
    if typ.startswith(u'text'):
        return typ + u"; charset=" + encoding_guesser.from_file(path).decode()
    else:
        return typ

def file_browser(path):
    headers = {u'Connection': u'close'}
    if not os.path.exists(path):
        return (None, headers)
    elif os.path.isdir(path):
        content_reader = lambda: u"\n".join(p for p in os.listdir(path) if not p.startswith(u'.')).encode('utf-8')
        headers.update({u'Content-Type': u'text/plain; charset=UTF-8'})
        return (content_reader, headers)
    else:
        headers.update({u'Content-Type': guess_type(path)})
        def content_reader():
            with open(path, u'rb') as f:
                return f.read()
        return (content_reader, headers)


def build_response(resource, headers, handler):
    content, response_headers = file_browser(resource)
    if content is None:
        return (HTTP_VERSION + u" 404 File Not Found\r\n\r\n").encode()
    else:
        status_line = u" ".join([HTTP_VERSION, u'202', u'Accepted']).encode()
        headers_bytes = (u"\r\n".join(imap(u':'.join, list(response_headers.items()))) + u'\r\n').encode()
        return handler(status_line, headers_bytes, content)

@parse_path
def handle_GET(resource, headers):
    def handler(status_line, headers_bytes, content_reader):
        return "\r\n".join([status_line, headers_bytes, content_reader()])
    return build_response(resource, headers, handler)

@parse_path
def handle_HEAD(resource, headers):
    def handler(status_line, headers_bytes, content):
        return "\r\n".join([status_line, headers_bytes, u''])
    return build_response(resource, headers, handler)


def missing_method(resource, headers):
    return HTTP_VERSION + u" 405 Method Not Allowed\r\n\r\n"


methodmap = defaultdict(lambda : missing_method)
methodmap.update({u'GET': handle_GET, u'HEAD': handle_HEAD})

def handle_client(sock):
    data = sock.recv(1000)
    while not data.endswith("\r\n\r\n"):
        newdata = sock.recv(1000)
        if not newdata:
            return
        data += newdata
    headers = data.strip().splitlines()
    request, headers = headers[0], headers[1:]
    headers = dict(imap(lambda s: s.split(':', 1), headers))
    try:
        method, resource, http_version = request.split()
    except ValueError:
        response = HTTP_VERSION + u" 400 Bad Request\r\n\r\n"
    else:
        method = method.decode()
        if method not in HTTP_METHODS:
            response = HTTP_VERSION + u" 501 Not Implemented\r\n\r\n"
        else:
            response = methodmap[method](resource, headers)
    sock.sendall(response)

if __name__ == u'__main__':
    sock = socket(AF_INET, SOCK_STREAM)
    sock.bind((u'', int(args.get(1, 8080))))
    sock.listen(1000)
    while True:
        with closing(sock.accept()[0]) as newsock:
            handle_client(newsock)