【脚本编程系列】关于Python网络通讯asyncore,你需要知道的事

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如何使用asyncore

# -*- coding:utf-8 -*-import asyncore, socketclass HttpClient(asyncore.dispatcher):    def __init__(self, host, path):        asyncore.dispatcher.__init__(self)        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)        self.connect((host, 80))        self.buffer = "GET %s HTTP/1.0 \r\n\r\n" %path    def handle_connect(self):        pass    def handle_close(self):        self.close()    def handle_read(self):        print self.recv(1024)    def handle_write(self):        sent = self.send(self.buffer)        self.buffer = self.buffer[sent:]    def writable(self):        return (len(self.buffer)>0)if __name__ == "__main__":    c = HttpClient("www.python.org","/")    asyncore.loop()

HTTP/1.1 500 Domain Not FoundServer: VarnishRetry-After: 0content-type: text/htmlCache-Control: private, no-cacheconnection: keep-aliveContent-Length: 179Accept-Ranges: bytesDate: Tue, 13 Jun 2017 08:11:23 GMTVia: 1.1 varnishConnection: close<html><head><title>Fastly error: unknown domain </title></head><body>Fastly error: unknown domain: . Please check that this domain has been added to a service.</body></html>

什么是asyncore

asyncore模块实现异步通信方式，提供了用来构建异步通信方式的客户端和服务器端的基础架构。
尤其适合聊天类的服务器端和协议的实现。
其运行过程是创建一个或多个网络信道；当信道创建后，通过轮询方式来激活网络信道的服务，直到最后一个网络信道关闭。

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