Python3 HTTP server with PUT support

test_server.py

#!/usr/bin/env python

import argparse
import http.server
import sys
import socketserver
import os

class HTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
    def __init__(self,req, client_addr, server):
        http.server.SimpleHTTPRequestHandler.__init__(self, req, client_addr, server)   

    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-type','text/html')
        self.end_headers()
        # Send the html message
        self.wfile.write(bytes("Hello World !", encoding="utf-8"))
        self.wfile.flush()
        return

    def do_PUT(self):
        path = self.translate_path(self.path)
        if path.endswith('/'):
            self.send_response(405, "Method Not Allowed")
            self.wfile.write("PUT not allowed on a directory\n".encode())
            return
        else:
            print(self.headers)
            if 'Content-Length' in self.headers:
                length = int(self.headers['Content-Length'])
                print(f"length = {length}")
                content = self.rfile.read(length)
                print(f"content = {content}")
                response = bytes(str(content), "utf-8")
                self.send_response(201)
                self.send_header("Access-Control-Allow-Origin", "*")
                self.send_header("Content-Length", str(len(response)))
                self.send_header("Content-type", "application/json")
                self.end_headers()

                self.wfile.write(response) #send response
                self.wfile.flush()
                print(f"Response = {response}")
            else:
                content = "No Content-Length header!"
                response = bytes(content, "utf-8")
                self.send_response(201)
                self.send_header("Access-Control-Allow-Origin","*")
                self.send_header("Content-Length", str(len(response)))
                self.send_header("Content-type", "application/json; encoding=utf-8")
                self.end_headers()

                self.wfile.write(response) #send response
                self.wfile.flush()

if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('--bind', '-b', default='', metavar='ADDRESS',
                        help='Specify alternate bind address '
                             '[default: all interfaces]')
    parser.add_argument('port', action='store',
                        default=8000, type=int,
                        nargs='?',
                        help='Specify alternate port [default: 8000]')
    args = parser.parse_args()

    try:
        with socketserver.TCPServer(("", args.port), HTTPRequestHandler) as httpd:
            print("serving at port", args.port)
            httpd.serve_forever()
    except KeyboardInterrupt:
        sys.exit(0)