A terrible security camera 2 - the server software

A few notes on the server software:

• I'm using the argparse module to allow me to change key information (IP address, port, debug information) from the command line.  The default is to use port 12345 on localhost.
• The server simply takes a photo and sends it to the client.
• The server runs forever until the process is stopped (ideally with CTRL-C).

An example of running the server: picam's IP address is 192.168.1.106 (I have set it up to have a static address on my home wifi). To run the server:

pi@picam:~/Python/camserver $ ./image-server.py -i 192.168.1.106 --debug
Server started on 192.168.1.106:12345

Because I've used the --debug flag, the server tells me it has started and the address and port number it's using.

 

The code

#!/usr/bin/env python3

import socketserver
import argparse
import sys
import time
from io import BytesIO
from picamera import PiCamera

class ImageHandler(socketserver.BaseRequestHandler):
    def handle(self):
        global camera
        global args
        try:
            if args.debug:
                print("Connection from {}".format(self.client_address[0]))
            stream = BytesIO()
            camera.capture(stream, format='jpeg')
            stream.seek(0)
            self.request.sendall(stream.getvalue())
            if args.debug:
                print("Image sent.")
        except Exception as e:
            print("Server exception")
            print(e)
        return 

class ImageServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
    def __init__ (self, server_address, handler_class=ImageHandler):
        socketserver.TCPServer.__init__(self, server_address, handler_class)
        return

if __name__ == '__main__':

    parser = argparse.ArgumentParser(description='Image server.')
    parser.add_argument('--hostip', '-i', action='store', dest='address', 
        default='127.0.0.1', help='IP address of server host.')
    parser.add_argument('--port', '-p', action='store', type=int, dest='port',
        default=12345, help='Port number.')
    parser.add_argument('--debug', '-d', action='store_true', default=False,
        dest='debug', help='Print debugging information.')
    args = parser.parse_args()

    try:
        camera = PiCamera()
        time.sleep(2)
        server = ImageServer((args.address, args.port), ImageHandler)
        if args.debug: 
            print("Server started on {}:{}".format(args.address, args.port))
        server.serve_forever()
    except Exception as e:
        print(e)
    except KeyboardInterrupt:
        if args.debug: 
            print("Server stopped.\n\n")