# Example adapted from:
# https://pythontic.com/modules/socket/udp-client-server-example

import socket
import time

localIP     = "0.0.0.0" # Server
localPort   = 22200
bufferSize  = 1024

# Create datagram socket
UDPServerSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)

# Bind
UDPServerSocket.bind((localIP, localPort))

print("UDP Server started on port " + str(localPort))

# Application constants and variables
EOF = chr(26)
PATH = 'drive\\path_where_received_files_should_be_stored\\'
DEBUG = False;

# Files loop
while(True):
    file = open(PATH + "temp-" + time.strftime("%Y%m%d.%H%M%S") + ".txt", "a")

    # Listen for incoming datagrams
    while(True):
        bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
        message = bytesAddressPair[0].decode('latin1')
        if DEBUG:
            print(message)
        if EOF in message:
            file.write(message[:len(message)-2])
            break
        else:
            file.write(message)
    print("EOF detected.")
    print("temp-" + time.strftime("%Y%m%d.%H%M%S") + ".txt" + " written.\n")
    file.close()
    if DEBUG:
        break
# End files loop
quit() # Unreachable!