Question

简单的客户端 - 服务器应用程序。

#Server use decode
import socket


s = socket.socket()
host = socket.gethostname()
port = 12345
s.bind((host,port))

s.listen(5)

while True:

    c,addr = s.accept()
    print("Got connection from " + str(addr))
    ret_val = s.send("Thank you".encode('utf-8'))
    print ("ret_val={}".format(ret_val))
    c.close()

客户端：

#client use decode
from socket import gethostname, socket

serSocket = socket()
server = gethostname()
port = 12345
serSocket.connect((server, port))

data = serSocket.recv(1024)
msg = data.decode('utf-8')
print("Returned Msg from server:  <{}>".format(msg))

serSocket.close()

当服务器尝试发送以下异常时

Traceback (most recent call last):
Got connection from ('192.168.177.1', 49755)
  File "C:/Users/Oren/PycharmProjects/CientServer/ServerSide/Server2.py", line 16, in <module>
    ret_val = s.send("Thank you".encode('utf-8'))
OSError: [WinError 10057] A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied

Process finished with exit code 1

可以看出，客户端成功连接了服务器。但发送失败。

有什么问题？

Answer 1

问题是您正在发送监听套接字，而不是连接的套接字上。 connect返回一个新套接字，这是您必须用于数据传输的套接字。监听套接字永远不能用于发送或接收数据。

将发送更改为此，您的程序将正常运行：

ret_val = c.send("Thank you".encode('utf-8'))

（注意c.send，而不是s.send）

Python socket.send无法正常工作

1 个答案: