python网络编程 — HTTP客户端

A simple http client.

It gets the contents of special webserver page and print it.(Default path is "/")

#!/usr/share/env python

#coding:utf-8

import argparse

import httplib

#设置默认访问url和端口

REMOTE_SERVER_HOST='www.python.org'

REMOTE_SERVER_PATH='/'

class HTTPClient(object):

    """

        docstring for HTTPClient

        Eg: python HTTPClient.py --host=www.iana.org

　　　　　　  python HTTPClient.py --host=www.iana.org --path='/domains/reserved'

    """

    def __init__(self, host):

        self.host = host

    def fetch(self,path):

        http = httplib.HTTP(self.host)

        #设置请求头信息

        http.putrequest("GET",path)

        http.putheader("User-Agent",__file__)

        http.putheader("Host",self.host)

        http.putheader("Accept","*/*")

        http.endheaders()

        try:

            #getreply方法返回service code ,service reseason,RFC82 headers

            errcode,errmsg,headers = http.getreply()

        except Exception,e:

            print "Client failed code: %s message: %s headers: %s" %(errcode,errmsg,headers)

        else:

            print "Got homepage from %s" %self.host

            #打印获取的内容

            file = http.getfile()

            return file.read()

if __name__ == '__main__':

    parse = argparse.ArgumentParser(description='HTTP Client Example')

    parse.add_argument('--host',action="store",dest="host",default=REMOTE_SERVER_HOST)

    parse.add_argument('--path',action="store",dest="path",default=REMOTE_SERVER_PATH)

    given_args = parse.parse_args()

    host,path = given_args.host,given_args.path

    client = HTTPClient(host)

    print client.fetch(path)