54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
#!/usr/bin/env python3
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#receiver.py
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import os, sys, getopt, time
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from netinterface import network_interface
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NET_PATH = './'
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OWN_ADDR = 'B'
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# ------------
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# main program
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# ------------
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try:
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opts, args = getopt.getopt(sys.argv[1:], shortopts='hp:a:', longopts=['help', 'path=', 'addr='])
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except getopt.GetoptError:
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print('Usage: python receiver.py -p <network path> -a <own addr>')
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sys.exit(1)
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for opt, arg in opts:
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if opt == '-h' or opt == '--help':
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print('Usage: python receiver.py -p <network path> -a <own addr>')
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sys.exit(0)
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elif opt == '-p' or opt == '--path':
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NET_PATH = arg
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elif opt == '-a' or opt == '--addr':
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OWN_ADDR = arg
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if (NET_PATH[-1] != '/') and (NET_PATH[-1] != '\\'): NET_PATH += '/'
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if not os.access(NET_PATH, os.F_OK):
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print('Error: Cannot access path ' + NET_PATH)
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sys.exit(1)
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if len(OWN_ADDR) > 1: OWN_ADDR = OWN_ADDR[0]
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if OWN_ADDR not in network_interface.addr_space:
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print('Error: Invalid address ' + OWN_ADDR)
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sys.exit(1)
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# main loop
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netif = network_interface(NET_PATH, OWN_ADDR)
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print('Main loop started...')
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while True:
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# Calling receive_msg() in non-blocking mode ...
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# status, msg = netif.receive_msg(blocking=False)
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# if status: print(msg) # if status is True, then a message was returned in msg
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# else: time.sleep(2) # otherwise msg is empty
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# Calling receive_msg() in blocking mode ...
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status, msg = netif.receive_msg(blocking=True) # when returns, status is True and msg contains a message
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print(msg.decode('utf-8'))
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