如何使用 Python 和 socket 发送和接收？

Question

I want to send to a server that his a raspberry pi and a client that works on Windows. The problem is that the client can connect, but after that, it only sends the message when I close the socket. Going further maybe the cause can be that I use portforwarding.

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My server code

import socket
import sys

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Bind the socket to the address given on the command line
server_address = ('', 1234)
sock.bind(server_address)
print >>sys.stderr, 'starting up on %s port %s' % sock.getsockname()
sock.listen(1)

while True:
    print >>sys.stderr, 'waiting for a connection'
    connection, client_address = sock.accept()
    try:
        print >>sys.stderr, 'client connected:', client_address
        while True:
            data = connection.recv(16)
            print >>sys.stderr, 'received "%s"' % data
            if data:
                connection.sendall(data)
            else:
                break
    finally:
        connection.close()

and the client

# coding: utf-8

import socket

socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

socket.connect(("", 1234))

user_tab=input("What do you want to send?")
data=(str(user_tab))
print(data)
data = data.encode("utf-8")
socket.sendall(data)

print("send all")

d=socket.recv(128)
socket.close()
host, port =('', 1234)

socket.close()

Answer 1

Sorry, but I don't see that problem what you talking about.

Client code:

user_tab = input("What do you want to send?")
data = (str(user_tab))
print(data)
data = data.encode("utf-8")
socket.sendall(data)
print("send all")

user_tab = input("something else?")

d=socket.recv(1024)
socket.close()

ScreenShot