python ConnectionRefusedError: [Errno 111] Connection refuse,,Python3实现了一个


Python3实现了一个简单的udp server和udp client。host指定为'localhost'时,在同一台机器上是运行正常的。

udpserver.py:

from socket import *HOST = 'localhost'PORT = 9999s = socket(AF_INET,SOCK_DGRAM)s.bind((HOST,PORT))print('...waiting for message..')while True:        data,address = s.recvfrom(1024)        print(data,address)        s.sendto('this is the UDP server'.encode('utf-8'), address)s.close()

udpclient.py:

from socket import *HOST='localhost'#HOST='deque.me'PORT=9999s = socket(AF_INET,SOCK_DGRAM)s.connect((HOST,PORT))while True:        message = input('send message: ')        s.sendall(message.encode('utf-8'))        data = s.recv(1024)        print(data)s.close()

如果将udpclient.py里的host改为"deque.me",程序会出现错误。

如果udpclient.py和udpserver.py运行在同一台机器上,也就是'deque.me'这台服务器上,错误如下:

ubuntu@VM-117-216-ubuntu:~/Shield/Py3$ python3 udpclient.py
send message: test
Traceback (most recent call last):
File "udpclient.py", line 12, in <module>
data = s.recv(1024)
ConnectionRefusedError: [Errno 111] Connection refused

如果把udpclietn.py放在另一台windows机器上执行,错误提示图下:

D:ShieldPy3>python udpclient.py
send message: test
Traceback (most recent call last):
File "udpclient.py", line 11, in <module>
data = s.recv(1024)
ConnectionResetError: [WinError 10054] 远程主机强迫关闭了一个现有的连接。

试了试将udpserver.py中的host改为'deque.me'和'115.159.29.211'(公网IP地址),均出现如下错误:

root@VM-117-216-ubuntu:~/Shield/Py3# python3 udpserver.py
Traceback (most recent call last):
File "udpserver.py", line 7, in <module>
s.bind((HOST,PORT))
OSError: [Errno 99] Cannot assign requested address

肯定的是'deque.me'是能正确解析到这Linux服务器的。请问,错在哪里?应该该怎么改?

找到答案了,bing('0.0.0.0',port)即可。

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