A simple HTTP server that prints the request headers and JSON body to the console.

server.py

from http.server import HTTPServer, SimpleHTTPRequestHandler
from json import dumps, loads
from sys import argv
from typing import Literal


class Server(SimpleHTTPRequestHandler):
    """
    Summary
    -------
    a simple HTTP server that prints the request headers and body to the console

    Methods
    -------
    do_POST()
        prints the request headers and body to the console
    """
    def do_POST(self): # pylint: disable=invalid-name
        """
        Summary
        -------
        prints the request headers and body to the console
        """
        content_length = int(self.headers['Content-Length'])
        post_data = self.rfile.read(content_length).decode('utf-8')
        post_data_list = dumps(loads(post_data), indent=2).split('\n')
        formatted_data = '\n'.join(line.strip() for line in post_data_list)

        print(f"\nPOST\n{self.headers}Body:\n{formatted_data}")
        self.send_response(404)


def parse_args() -> int | Literal[5000]:
    """
    Summary
    -------
    parses the command line arguments

    Returns
    -------
    port (int | 5000) : a port number from 1025 to 65536
    """
    try:
        return 5000 if len(argv) < 2 else int(argv[1])

    except ValueError:
        print("\nPort must be an integer.\ne.g. python server.py 5000\n")
        raise


def init_server():
    """
    Summary
    -------
    initializes the server
    """
    port = parse_args()
    host = 'localhost'
    httpd = HTTPServer((host, port), Server)

    try:
        print(f"Serving HTTP on {host} port {port} (http://{host}:{port}/)..")
        httpd.serve_forever()

    except KeyboardInterrupt:
        print("Manual exit detected.")

    finally:
        httpd.server_close()
        print("\nServer closing..")


if __name__ == '__main__':
    init_server()