Python mock server

python_mock_server.py

#!/usr/bin/env python3

"""
Very simple HTTP server in Python

1. Create `mock-server` dir
2. Put this script and .json files (representing responses) into the folder
3. In CLI run: cd ~/mock-server && python3 server.py [<any_available_and_preferrable_port>] - server will be running on localhost (127.0.0.1:<port>)
4. To request resources locally: `localhost:<port>/<name_of_resource>.json`
5. To request resources remotely: 
5.1 Find your IP: `ifconfig | grep "inet " | grep -Fv 127.0.0.1 | awk '{print $2}'`
5.2 Request resource: http://<you.IP>:<host>/<name_of_resource>.json`

!!! If a client closes before the response completely recieved or for any other reasons (restrictions), the server may error with `BrokenPipeError: [Errno 32] Broken pipe` 
"""

from http.server import BaseHTTPRequestHandler, HTTPServer
import logging
import json
import time

class S(BaseHTTPRequestHandler):
    def sleep(self, seconds):
        logging.warning("Sleeping for %s seconds.", seconds)
        time.sleep(seconds)

    def _set_response(self):
        self.send_response(200) # <---- scpecify status to return
        self.send_header('Content-type', 'application/json') # <---- scpecify headers to return
        self.send_header('Test-header', 'test_header_1')
        self.end_headers()
        
        stripped_path_to_file = str(self.path)[1:] # <---- removes a slash from the path
        logging.info("Requested PATH (file): '%s'", stripped_path_to_file)
        # secondsToSleep = 5
        # self.sleep(secondsToSleep) # <----- use this to test timeouts
        with open(stripped_path_to_file, "r") as data_file:
            data = json.load(data_file)
            payload = json.dumps(data)
            logging.info("Content of '%s': %s", stripped_path_to_file, payload)
            self.wfile.write(payload.encode('utf-8'))

    def do_GET(self):
        logging.info("GET request,\nPath: %s\nHeaders:\n%s\n", str(self.path), str(self.headers))
        self._set_response()

    def do_POST(self):
        content_length = int(self.headers['Content-Length']) # <--- Gets the size of data
        post_data = self.rfile.read(content_length) # <--- Gets the data itself
        logging.info("POST request,\nPath: %s\nHeaders:\n%s\n\nBody:\n%s\n",
                str(self.path), str(self.headers), post_data.decode('utf-8'))
        self._set_response()

def run(server_class=HTTPServer, handler_class=S, port=8080):
    logging.basicConfig(level=logging.INFO)
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    logging.info('Starting Python Server\n')
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass
    httpd.server_close()
    logging.info('Stopping Python Server\n')

if __name__ == '__main__':
    from sys import argv

    if len(argv) == 2:
        run(port=int(argv[1]))
    else:
        run()