[已解决]python网络编程遇到问题

htyj0

想写一个简单的TCP通信程序，客户端输入字符串，服务器加上时间戳后将字符串原样返回。

客户端程序：
# 客户端程序TCP_Client.py

import socket as s
from time import ctime

HOST = '127.0.0.1'
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST, PORT)

tcpCliSock = s.socket(s.AF_INET, s.SOCK_STREAM)
tcpCliSock.connect(ADDR)

while(True):
    data = input('> ')
    #data = b'\x01\x02\x03'
    if not data:
        print('ivalid data')
        break

    tcpCliSock.send(data.encode())
    data = tcpCliSock.recv(BUFSIZE)
    if not data:
        break
    print(data.decode('utf-8'))

tcpCliSock.close()

服务器端程序：

# 服务器程序 TCP_Server.py

import socket as s
from time import ctime

HOST = ''
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST, PORT)

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

tcpServerSock.bind(ADDR)

tcpServerSock.listen(5)

while True:
    print('waiting for connection...')
    tcpCliSock, addr = tcpServerSock.accept()

    print('...Connected from: ', addr)

    while True:
        data = tcpCliSock.recv(BUFSIZE)
        str_data = data.decode()
        if not data:
            break
        print('data received: ', str_data)
        tcpCliSock.send('[%s] : %s' % (ctime(), str_data))

    tcpCliSock.close()

tcpServerSock.close()

在客户端任意输入一个字符串时，服务器可以显示，但会提示错误。


服务器端显示：
================== RESTART: F:\00_AppData\python\TCP_Server.py =================
waiting for connection...
...Connected from:  ('127.0.0.1', 50416)
data received:  hello
Traceback (most recent call last):
  File "F:\00_AppData\python\TCP_Server.py", line 29, in <module>
    tcpCliSock.send('[%s] : %s' % (ctime(), str_data))
TypeError: a bytes-like object is required, not 'str'
>>>

请大神帮忙看一下，感激不尽。。

最佳答案

月排行榜 / 总排行榜

hrp

2021-3-25 16:35:19

报错提示send接受字节对象，不是字符串，试试先将字符串编码再发送(未测试)

# 服务器程序 TCP_Server.py

import socket as s
from time import ctime

HOST = ''
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST, PORT)

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

tcpServerSock.bind(ADDR)

tcpServerSock.listen(5)

while True:
    print('waiting for connection...')
    tcpCliSock, addr = tcpServerSock.accept()

    print('...Connected from: ', addr)

    while True:
        data = tcpCliSock.recv(BUFSIZE)
        str_data = data.decode()
        if not data:
            break
        print('data received: ', str_data)
        tcpCliSock.send(('[%s] : %s' % (ctime(), str_data)).encode('utf-8'))

    tcpCliSock.close()

tcpServerSock.close()

跳转到最佳答案楼层

z5560636

tcpCliSock.send('[%s] : %s' % (ctime(), str_data))

只能传字节参数，  你需要在外面转换成字节， 然后send

hrp

报错提示send接受字节对象，不是字符串，试试先将字符串编码再发送(未测试)

# 服务器程序 TCP_Server.py

import socket as s
from time import ctime

HOST = ''
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST, PORT)

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

tcpServerSock.bind(ADDR)

tcpServerSock.listen(5)

while True:
    print('waiting for connection...')
    tcpCliSock, addr = tcpServerSock.accept()

    print('...Connected from: ', addr)

    while True:
        data = tcpCliSock.recv(BUFSIZE)
        str_data = data.decode()
        if not data:
            break
        print('data received: ', str_data)
        tcpCliSock.send(('[%s] : %s' % (ctime(), str_data)).encode('utf-8'))

    tcpCliSock.close()

tcpServerSock.close()

htyj0

hrp 发表于 2021-3-25 16:35
报错提示send接受字节对象，不是字符串，试试先将字符串编码再发送(未测试)

是这样的，用改过的代码测试已通过。万分感谢！