simple python http server to dump request headers

log_http_headers.py

#!/usr/bin/env python3

import http
import http.server
import socketserver
import sys


def _log(s):
    print(s)


class LoggingHandler(http.server.BaseHTTPRequestHandler):
    def _consume_request_body(self):
        try:
            nbytes = int(self.headers.get("content-length"))
        except (TypeError, ValueError):
            return

        if nbytes > 0:
            self.rfile.read(nbytes)

    def _handle_request(self):
        _log(f"Handling {self.command} request")
        _log("Headers:")
        _log(self.headers)

        self._consume_request_body()

        self.send_response(http.HTTPStatus.OK)
        self.send_header("X-Foo", "Bar")
        self.end_headers()
        self.wfile.write(b"Hi there")

    for verb in "GET HEAD POST PUT DELETE CONNECT OPTIONS TRACE PATCH".split():
        exec(f"def do_{verb}(self): return self._handle_request()")


class Server(socketserver.TCPServer):
    allow_reuse_address = True


if __name__ == "__main__":
    import argparse

    parser = argparse.ArgumentParser()
    parser.add_argument(
        "port",
        default=8000,
        type=int,
        nargs="?",
        help="bind to this port " "(default: %(default)s)",
    )
    args = parser.parse_args()

    with Server(("", args.port), LoggingHandler) as httpd:
        print(f"Serving HTTP on port {args.port}")
        try:
            httpd.serve_forever()
        except KeyboardInterrupt:
            print("\nKeyboard interrupt received, exiting.")
            sys.exit(0)