Question

所以，我试图学习在python 3.2.5中正确使用套接字，我在互联网上找到了一个基本客户端和服务器的例子，并编辑了一下使用python 3.x（显示这里）：服务器：

print("Server")
from socket import *
myHost = ''
myPort = 2000
s = socket(AF_INET, SOCK_STREAM)    # create a TCP socket
s.bind((myHost, myPort))            # bind it to the server port
s.listen(5)                         # allow 5 connections
while 1:
    # wait for next client to connect
    connection, address = s.accept() # connection is a new socket
    while 1:
        data = connection.recv(1024) # receive up to 1K bytes
        if data:
            connection.send('echo -> ' + data.decode("UTF-8"))
        else:
            break
    connection.close()              # close socket

客户端：

print("Client")
import sys
from socket import *
serverHost = 'localhost'            # servername is localhost
serverPort = 2000                   # use arbitrary port > 1024

s = socket(AF_INET, SOCK_STREAM)    # create a TCP socket


s.connect((serverHost, serverPort)) # connect to server on the port
s.send(bytes("Hi", "UTF-8"))        # send the data
while 1:
    data = s.recv(1024)             # receive up to 1KB
    print(data)

但是，即使服务器没有运行，我的客户也会无限接收并打印＆＃34;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39;＆＃39; （无限循环可能是不必要的，只是有一个例子。）我想知道为什么会这样。

我遇到的另一个问题是，一旦客户端启动并向其发送消息，服务器就会崩溃，它会发出以下消息：

Traceback (most recent call last):
  File "C:\...\server.py", line 14, in <module>
    connection.send('echo -> ' + data.decode("UTF-8"))
TypeError: 'str' does not support the buffer interface

Answer 1

服务器失败的原因是;

connection.send('echo -> ' + data.decode("UTF-8"))

...尝试发送字符串，但send想要一个字节数组。换句话说，你需要做类似的事情;

connection.send(bytes('echo -> ' + data.decode("UTF-8"), "UTF-8"))

在客户端，您没有考虑可以从服务器端关闭套接字，recv将返回0字节。你的while循环最好不要打破一个空数组;

while 1:
    data = s.recv(1024)             # receive up to 1KB
    if len(data) == 0:              # but stop if socket is closed
        break
    print(data)

为什么我的客户会继续接收b＆＃39;＆＃39;我的服务器崩溃了

1 个答案: