ashttpcli.py

python web programming 部分

import asyncore
import socket

class http_client (asyncore.dispatcher):

    def __init__ (self, host, path, cnum):
        asyncore.dispatcher.__init__ (self)
        self.path = path
        self.cnum = cnum
        self.host = host
        self.wflag = 1
        self.create_socket (socket.AF_INET, socket.SOCK_STREAM)
        self.connect ((self.host, 80))

    def handle_connect (self):
        self.send ('GET %s HTTP/1.0\r\n\r\n' % self.path)
        print "Channel:", self.cnum, \
                "Sent request for", self.path, "to", self.host
        self.wflag = 0

    def handle_read (self):
        data = self.recv (8192)
        print "Channel:", self.cnum, "Received", len(data), "bytes"

    def handle_write (self):
        print "Channel:", self.cnum, "was writable"

    def writable(self):
        return self.wflag

import sys
import urlparse
cnum = 0
for url in sys.argv[1:]:
    parts = urlparse.urlparse (url)
    if parts[0] != 'http':
        raise ValueError, "HTTP URL's only, please"
    else:
        cnum += 1
        host = parts[1]
        path = parts[2]
        http_client (host, path, cnum)
asyncore.loop()