Python: UDP 回显服务器异步；发送后套接字关闭

Question

我正在尝试编写一个使用 asyncore.dispatcher_with_send

回显数据的 UDP 服务器

我遇到的问题是，当我设置缓冲区并调用 self.send(self.buffer) 时，它似乎调用了 handle_close 并关闭了套接字。

import asyncore, socket,

class Server(asyncore.dispatcher_with_send): 

def __init__(self):
    asyncore.dispatcher.__init__(self)
    self.create_socket(socket.AF_INET, socket.SOCK_DGRAM)
    self.bind(('192.168.0.10', 1452))
    self.buffer = ''
    self.recvData = ''


def handle_close(self):
    self.close()

def handle_read(self):
    print self.recv(8192)
    self.buffer ='a'

def handle_write(self):
    if self.buffer != '':
        sent = self.send(self.buffer)
        self.buffer = self.buffer[sent:]


if __name__ == '__main__':

The_Server = Server()
asyncore.loop()

有什么想法吗？

谢谢

Answer 1

解决方案是使用 sendto 并确保 sendto 地址是明确的。

import asyncore, socket,

class Server(asyncore.dispatcher_with_send): 

def __init__(self):
    asyncore.dispatcher.__init__(self)
    self.create_socket(socket.AF_INET, socket.SOCK_DGRAM)
    self.bind(('192.168.0.10', 1452))
    self.buffer = ''
    self.recvData = ''


def handle_close(self):
    self.close()

def handle_read(self):
    print self.recv(8192)
    self.buffer ='a'

def handle_write(self):
    if self.buffer != '':
        sent = self.sendto(self.buffer,('192.168.0.9',1452))
        self.buffer = self.buffer[sent:]


if __name__ == '__main__':

The_Server = Server()
asyncore.loop()

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