Python - 连接不断被拒绝

Question

我使用python创建了一个小型局域网聊天，并且出于某种原因，我一直拒绝我的连接。以下是错误：

File "client.py", line 35, in data, addr = s.recvfrom(1024) ConnectionRefusedError: [Errno 111] Connection refused

这里是server.py代码：

import socket 
from time import sleep 

host = '127.0.0.1' 
port = 5000 
ips = [] 

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
s.bind((host, port)) 

print('server started') 

quitS = False 
while not quitS: 
    data, addr = s.recvfrom(1024) 
    if 'quitS' in str(data): 
     print('server will close in...') 
     for i in reversed(range(4)): 
      sleep(1) 
      print (i) 
     quitS = True 
     break 
    print (str(addr) + ': '+str(data)) 
    if addr not in ips: 
     ips.append(addr) 
    for ip in ips: 
     s.sendto(data, ip) 

s.close() 

而且我client.py：

import socket 
from time import sleep 
from getpass import getpass 

host = '192.168.1.126' 
port = 5000 

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
s.connect((host, port)) 

loop = True 
while loop: 
    try: 
     s.settimeout(4) 
     text = input('Type: ') 
     data = text.encode('UTF-8') 
     if text == 'quitS': 
      passwd = False 
      pcount = 0 
      while not passwd: 
       pcount += 1 
       pwd = getpass() 
       if pwd == '1234': 
        s.send(data) 
        passwd = True 
       elif pcount == 3: 
        print ('HHell no, go away') 
        break 
     elif text == 'q': 
      s.close() 
      break 
     elif text == '': 
      print('Inavalid, entry not allowed.') 
     else: 
      s.send(data) 
      data, addr = s.recvfrom(1024) 
      print (str(addr) + ': ' + str(data)) 
    except (socket.timeout, ConnectionResetError): 
     loop = False 
     sleep(2) 
     print('Server is dead, will close in...') 
     for i in reversed(range(4)): 
      sleep(1) 
      print (i) 

的server.py是我的RPI运行，他是我的ufw status verbose输出：

5000      ALLOW IN Anywhere 
6001      ALLOW IN Anywhere 
5001      ALLOW IN Anywhere 
22       ALLOW IN Anywhere 
5900      ALLOW IN Anywhere 
5800      ALLOW IN Anywhere 
5000      ALLOW IN Anywhere (v6) 
6001      ALLOW IN Anywhere (v6) 
5001      ALLOW IN Anywhere (v6) 
22       ALLOW IN Anywhere (v6) 
5900      ALLOW IN Anywhere (v6) 
5800      ALLOW IN Anywhere (v6) 

5000      ALLOW OUT Anywhere 
5000      ALLOW OUT Anywhere (v6) 

client.py ufw设置几乎相同，我允许在端口5000上进出。

我在做什么错？并且，如果您对代码有任何建议，请告诉我！

Answer 1

在server.py中，将host = '127.0.0.1'更改为host = '0.0.0.0'。在127.0.0.1上收听将只允许来自本地主机的连接。有关更详细的解释，请参阅What is the difference between 0.0.0.0, 127.0.0.1 and localhost?。