学习 sock 的问题 2

一直搞不懂这个 sock.recv()有什么用，在实践中该怎么规定大小。于是我自作聪明的把 1024 改为了 4 。然后我就贴代码了。

client.py

# -*- coding: utf-8 -*-

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 9999))
print(s.recv(1024).decode('utf-8'))
for data in [b'12345', b'67890']:
	s.send(data)
	print(s.recv(1024).decode('utf-8'))
s.send(b'exit')
s.close()

Output

Welcome!
Hello, 1234!
Hello, 5!

server.py

# -*- coding: utf-8 -*-

import socket, threading, time

def tcplink(sock, addr):
	print('Accept new connection from %s:%s' % addr)
	sock.send(b'Welcome!')
	while True:
		data = sock.recv(4)
		time.sleep(1)
		if not data or data.decode('utf-8') == 'exit':
			break
		sock.send(('Hello, %s!' % data.decode('utf-8')).encode('utf-8'))
	sock.close()
	print('Connection from %s:%s closed' % addr)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('127.0.0.1', 9999))
s.listen(5)
print('Waiting for connection')
while True:
	sock, addr = s.accept()
	t = threading.Thread(target=tcplink, args=(sock, addr))
	t.start()

Output

Waiting for connection
Accept new connection from 127.0.0.1:59877
Exception in thread Thread-1:
Traceback (most recent call last):
  File "D:\Program Files\Python35\lib\threading.py", line 914, in _bootstrap_inner
    self.run()
  File "D:\Program Files\Python35\lib\threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\xxxx\Desktop\server.py", line 9, in tcplink
    data = sock.recv(4)
ConnectionAbortedError: [WinError 10053] 你的主机中的软件中止了一个已建立的连接。