如何在一个python代码中运行两个服务器

Question

我尝试在一个python代码中创建两个udp监听服务器，如下所示，

import threading
import time
import socket

class udpreceive:
      def __init__(self,port,ip):
           self.port = port
           self.ip = ip
           self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
           self.sock.bind((self.ip, self.port))

      def startserver(self):
           while True:
           time.sleep(1)
           data, addr = self.sock.recvfrom(1024)
           print (data)

server1 = udpreceive(514,"192.168.1.5")
s1 =  threading.Thread(target=server1.startserver())

server2 = udpreceive(515,"192.168.1.5")
s2 =  threading.Thread(target=server2.startserver())

s2.start()
s1.start()

这是udp sender 1的客户端代码

import socket
import time
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
counter =0
while True:
   send_data = "hellow world server1 :- "+ str(counter)
   sock.sendto(send_data.encode(), ("192.168.1.5", 514))
   print (send_data)
   counter +=1

这是发件人2的客户端代码

import socket
import time
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
counter =0
while True:
   send_data = "hellow world server2 :- "+ str(counter)
   sock.sendto(send_data.encode(), ("192.168.1.5", 514))
   print (send_data)
   counter +=1

当我运行接收代码时，它只显示发送者1数据。仅启动发件人2并开始接收代码，但它不显示任何发件人2发送数据但我启动发件人1接收代码显示发件人1数据。

我做错了什么？我需要在接收程序中显示发送方1和发送方2的数据

我很高兴oop和socket编程谢谢

Answer 1

在线程模块中，“target”关键字参数不应包含括号，请参阅How NOT to wait for a thread to finish in Python。应该是：

threading.Thread(target=server1.startserver)

然后，两个UDP服务器线程应该开始然后加入，因为公平共享CPU资源很重要（特别是在使用无限循环时）。

服务器的代码可以是：

import threading
import time
import socket

class udpreceive:
     def __init__(self,port,ip):
          self.port = port
          self.ip = ip
          self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
          self.sock.bind((self.ip, self.port))

     def startserver(self):
          while True:
               data, addr = self.sock.recvfrom(1024)
               print(f'port {self.port} receives {data}')

s1 = udpreceive(514, "192.168.1.5")
s2 = udpreceive(515, "192.168.1.5")
threads = [threading.Thread(target=s1.startserver), threading.Thread(target=s2.startserver)]

for th in threads:
     th.start()
     print(f'threads {th} started')
     th.join(0.1)

同时，您可能需要将发件人2中的代码更改为：

sock.sendto(send_data.encode(), ("192.168.1.5", 515)) # Send to port 515, not 514