服务器和客户端之间的通信失败

Question

以下两个代码的任务是从客户端接收字符串，然后添加时间戳，最后将其发送回客户端。我已经按正确的顺序运行了它们(首先是服务器，然后是客户端(，但在键入字符串后似乎什么都没发生。这是我的代码：

1. tsTserv3.py：

#!/usr/bin/env python
from socket import *
from time import ctime
HOST = ''
PORT = 21565
BUFSIZ = 1024
ADDR = (HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)
while True:
print('waiting for connection...')
tcpCliSock, addr = tcpSerSock.accept()
print('...connected from:', addr)
while True:
data = tcpCliSock.recv(BUFSIZ)
if not data:
break
tcpCliSock.send('[%s] %s' % (
bytes(ctime(), 'utf-8'), data))
tcpCliSock.close()
tcpSerSock.close()

2. tsTcint3.py

#!/usr/bin/env python
from socket import *
HOST = '127.0.0.1'
PORT = 21565
BUFSIZ = 1024
ADDR = (HOST, PORT)
tcpCliSock = socket(AF_INET, SOCK_STREAM)
tcpCliSock.connect(ADDR)
while True:
data = input('> ').encode()
if not data:
break
tcpCliSock.send(data)
data = tcpCliSock.recv(BUFSIZ)
if not data:
break
print(data.decode('utf-8'))
tcpCliSock.close()

Answer 1

当我将服务器中的代码更改为时，效果很好

tcpCliSock.send(f'{ctime()} {data}'.encode())

删除最后两行中的选项卡空间一次。

所以服务器的最终代码是这样的：

#!/usr/bin/env python
from socket import *
from time import ctime
HOST = ''
PORT = 21565
BUFSIZ = 1024
ADDR = (HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)
while True:
print('waiting for connection...')
tcpCliSock, addr = tcpSerSock.accept()
print('...connected from:', addr)
while True:
data = tcpCliSock.recv(BUFSIZ)
if not data:
break
tcpCliSock.send(f'{ctime()} {data}'.encode())
tcpCliSock.close()
tcpSerSock.close()