why this server can not run in python30

Wed Oct 22 01:45:31 EDT 2008

import asyncore, asynchat
import os, socket, string

PORT = 8000

class HTTPChannel(asynchat.async_chat):

    def __init__(self, server, sock, addr):
        asynchat.async_chat.__init__(self, sock)
        self.set_terminator("\r\n")
        self.request = None
        self.data = ""
        self.shutdown = 0

    def collect_incoming_data(self, data):
        self.data = self.data + data

    def found_terminator(self):
        if not self.request:
            # got the request line
            self.request = string.split(self.data, None, 2)
            if len(self.request) != 3:
                self.shutdown = 1
            else:
                self.push("HTTP/1.0 200 OK\r\n")
                self.push("Content-type: text/html\r\n")
                self.push("\r\n")
            self.data = self.data + "\r\n"
            self.set_terminator("\r\n\r\n") # look for end of headers
        else:
            # return payload.
            self.push("<html><body><pre>\r\n")
            self.push(self.data)
            self.push("</pre></body></html>\r\n")
            self.close_when_done()

class HTTPServer(asyncore.dispatcher):

    def __init__(self, port):
        asyncore.dispatcher.__init__(self)
        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
        self.bind(("", port))
        self.listen(5)

    def handle_accept(self):
        conn, addr = self.accept()
        HTTPChannel(self, conn, addr)

#
# try it out

s = HTTPServer(PORT)
print ("serving at port", PORT, "...")
asyncore.loop()