simple_server.py

#!/usr/bin/env python3
'''
This is intended to be a simple example of listening on two sockets simultaneously
using Python's http.server and socketserver modules.
'''
import http.server
import select
import socketserver


latest_nmea = []


class GPSMessageHandler(socketserver.DatagramRequestHandler):
    def handle(self):
        msg = self.rfile.readline().rstrip()
        latest_nmea.append(msg)
        if len(latest_nmea) > 5:
            del latest_nmea[0]


class HTTPRequestHandler(http.server.BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-Type', 'text/html')
        self.end_headers()
        self.wfile.write(b'<ul>' + b''.join(b'<li>' + m for m in latest_nmea) + b'</ul>')


if __name__ == '__main__':
    gpsd = socketserver.UDPServer(('', 22335), GPSMessageHandler)
    httpd = http.server.HTTPServer(('', 8080), HTTPRequestHandler)

    while True:
        readable, _, _ = select.select([httpd, gpsd], [], [])
        for server in readable:
            server.handle_request()