Python HTTP server

$ cat http-server.py
#!/usr/bin/env python3

from os import getenv
from json import dumps as json_dumps, loads as json_loads
from http.server import HTTPServer, BaseHTTPRequestHandler
from http import HTTPStatus

HTTP_PORT = 4444

class MyHTTPServer(HTTPServer):
    def server_bind(self):
        print("MyHTTPServer.server_bind()",self.server_address)
        return HTTPServer.server_bind(self)

class MyHTTPRequestHandler(BaseHTTPRequestHandler):
    def __init__(self,request,client_address,server):
        print("MyHTTPRequestHandler.__init__()",request,client_address,server)
        BaseHTTPRequestHandler.__init__(self,request,client_address,server)

    def __send_reply(self,http_code,js):
        js['headers'] = str(self.headers).replace("\n","|")
        js['path'] = self.path
        buf = json_dumps(js,sort_keys=True,indent=2) + "\n"
        self.send_response(http_code)
        self.send_header("Content-type","application/json")
        self.end_headers()
        self.wfile.write(buf.encode().decode('unicode-escape').encode('UTF-8'))

    def do_GET(self):
        self.__send_reply(HTTPStatus.METHOD_NOT_ALLOWED,dict(error="method not allowed"))

    def do_POST(self):
        length = int(self.headers.get('Content-Length', 0))
        body_buf = self.rfile.read(length)
        body_js = json_loads(body_buf)
        js = dict(res="ok",len=length,body=body_js)
        self.__send_reply(HTTPStatus.OK,js)

def http_server(server_class=HTTPServer, handler_class=BaseHTTPRequestHandler):
    server_address = ('', HTTP_PORT)
    httpd = server_class(server_address, handler_class)
    httpd.serve_forever()  # lo para el handler con 'shutdown()'

if __name__ == "__main__":
    if getenv("SIMPLE") == "1":
        http_server()
    else:
        http_server(MyHTTPServer,MyHTTPRequestHandler)

import http.server
import socketserver

PORT = 8000

Handler = http.server.SimpleHTTPRequestHandler

with socketserver.TCPServer(("", PORT), Handler) as httpd:
    print("serving at port", PORT)
    httpd.serve_forever()