Question

我正在尝试使用本教程学习如何使用套接字：
https://www.tutorialspoint.com/python/python_networking.htm
我已经将代码从站点复制到我的目录中，并且完全像在教程中那样运行，但是出现了错误。这是教程中的代码。

#!/usr/bin/python           # This is server.py file

import socket               # Import socket module

s = socket.socket()         # Create a socket object
host = 'localhost' # Get local machine name
port = 12345                # Reserve a port for your service.
s.bind((host, port))        # Bind to the port

s.listen(5)                 # Now wait for client connection.
while True:
    c, addr = s.accept()     # Establish connection with client.
    print("asdf")
    c.send('Thank you for connecting')
    c.close()                # Close the connection

和client.py

#!/usr/bin/python           # This is client.py file

import socket               # Import socket module

s = socket.socket()         # Create a socket object
host = socket.gethostname() # Get local machine name
port = 12345                # Reserve a port for your service.

s.connect((host, port))
print s.recv(1024)
s.close                     # Close the socket when done

这些是我运行的控制台命令：

python server.py &
python client.py

运行命令后出现此错误：

Traceback (most recent call last):
  File "client.py", line 9, in <module>
    s.connect((host, port))
  File     "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/soc    ket.py", line 228, in meth
return getattr(self._sock,name)(*args)
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

如果这有用，我使用的python版本是Python 2.7.10，我使用的是10.12.6版本的mac

提前致谢

Answer 1

来自socket.gethostname的文档：

返回一个字符串，其中包含机器的主机名   Python解释器目前正在执行。

注意：gethostname()并不总是返回完全限定的域   名称;请使用getfqdn()。

主机IP与主机名不同。你有几个选择：

您可以手动将host分配给0.0.0.0或localhost

您还可以查询socket.gethostbyname：

host = socket.gethostbyname(socket.gethostname()) # or socket.getfqdn() if the former doesn't work

Answer 2

我对您的代码进行了一些更改。这是 server.py

#!/usr/bin/python           # This is server.py file 
import socket               # Import socket module

s = socket.socket()         # Create a socket object 
host = socket.gethostname() # Get local machine name
port = 12345                # Reserve a port for your service.
s.bind((host, port))        # Bind to the port

s.listen(5) 
c,addr= s.accept()


print "Got connection from the ", addr
c.send('Thank you for connecting')

c.close()                # Close the connection

这是 client.py

#!/usr/bin/python           # This is client.py file

import socket               # Import socket module

s = socket.socket()         # Create a socket object
host = socket.gethostname() # Get local machine name
port = 12345                # Reserve a port for your service.

s.connect((host, port))

msg = (s.recv(1024))
print msg
s.close                     # Close the socket when done

我希望它会有所帮助

错误：提供了nodename或servname，或者未知（python套接字）

2 个答案: