File: completion_logger_server.py

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#!/usr/bin/env python3
from __future__ import absolute_import, division, print_function
import sys
from socket import *
from time import strftime
import datetime


def main():
    if len(sys.argv) < 4:
        print("completion_logger_server.py <listen address> <listen port> <log file>")
        exit(1)

    host = sys.argv[1]
    port = int(sys.argv[2])
    buf = 1024 * 8
    addr = (host, port)

    # Create socket and bind to address
    UDPSock = socket(AF_INET, SOCK_DGRAM)
    UDPSock.bind(addr)

    print("Listing on {0}:{1} and logging to '{2}'".format(host, port, sys.argv[3]))

    # Open the logging file.
    f = open(sys.argv[3], "a")

    # Receive messages
    while 1:
        data, addr = UDPSock.recvfrom(buf)
        if not data:
            break
        else:
            f.write("{ ")
            f.write(
                '"time": "{0}"'.format(
                    datetime.datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
                )
            )
            f.write(', "sender": "{0}" '.format(addr[0]))
            f.write(', "data": ')
            f.write(data)
            f.write(" }\n")
            f.flush()

    # Close socket
    UDPSock.close()


if __name__ == "__main__":
    main()