CODEWITHSUNDEEP
pythonsocketsudp
Citra Dewi
Citra Dewi

Reputation: 343

Python keyboard input in terminal while UDP socket server is listening

How to send socket data based on keyboard input in terminal while receiving incoming UDP data? Data will be send through socket after enter key is pressed included LF (line feed character).

I only have this minimal UDP server:

import socket
SERV_IPV4, SERV_PORT = ("192.168.43.150", 7777)
udpSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udpSock.bind((SERV_IPV4,SERV_PORT))

while 1:
  dataRecv, CLNT_ADDR = udpSock.recvfrom(1024)
  print(dataRecv, CLNT_ADDR)

What I expect about program is moreless like how netcat command work: nc -ulp 7777

Upvotes: 0

Views: 334

Answers (2)

user18791650
user18791650

Reputation:

Use Threading

import socket, threading
SERV_IPV4, SERV_PORT = ("192.168.43.150", 7777)
udpSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udpSock.bind((SERV_IPV4,SERV_PORT))

dataRecv = ""
CLNT_ADDR = None

def receiveData():
  global CLNT_ADDR
  global dataRecv
  while (1):
    dataRecv, CLNT_ADDR = udpSock.recvfrom(1024)
    print(dataRecv, CLNT_ADDR)

recvThread = threading.Thread(target=receiveData)
recvThread.start()
recvThread.join(0)

while (1):
  dataSend = (input() + "\n").encode()
  print(dataSend)
  udpSock.sendto(dataSend,CLNT_ADDR)

Upvotes: 1

bugless-soup
bugless-soup

Reputation: 71

You can set your socket in non-blocking mode:

import socket

SERV_IPV4, SERV_PORT = ("192.168.43.150", 7777)
udpSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udpSock.bind((SERV_IPV4,SERV_PORT))

udpSock.setblocking(False)

while 1:
    try:
        dataRecv, CLNT_ADDR = udpSock.recvfrom(1024)
        print(dataRecv, CLNT_ADDR)
    except socket.error:
        # No input from the socket

Upvotes: 1

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