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()