how to send an array over a socket in python

Question

I have an array kind of ([1,2,3,4,5,6],[1,2,3,4,5,6]) this. I have to send it over a STREAM/TCP socket in python. Then I have to receive the same array at the receiving end.

Answer 1

Sockets are byte streams, so ideal is to write your protocol (read this)

This is a basic example without protocol and you should care about buffer -> recv(). If it is too small, your data will be chopped off. That's why you should implement a protocol, if you send unknown size of data.

Client:

import socket, pickle

HOST = 'localhost'
PORT = 50007
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
arr = ([1,2,3,4,5,6],[1,2,3,4,5,6])
data_string = pickle.dumps(arr)
s.send(data_string)

data = s.recv(4096)
data_arr = pickle.loads(data)
s.close()
print 'Received', repr(data_arr)

Server:

import socket

HOST = 'localhost'
PORT = 50007
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
while 1:
    data = conn.recv(4096)
    if not data: break
    conn.send(data)
conn.close()