使用python模拟登陆百度

#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Function:   Used to demostrate how to use Python code to emulate login baidu main page: http://www.baidu.com/
Note:       Before try to understand following code, firstly, please read the related articles:
            (1)【整理】关于抓取网页，分析网页内容，模拟登陆网站的逻辑/流程和注意事项

http://www.crifan.com/summary_about_flow_process_of_fetch_webpage_simulate_login_website_and_some_notice/

            (2) 【教程】手把手教你如何利用工具(IE9的F12)去分析模拟登陆网站(百度首页)的内部逻辑过程

http://www.crifan.com/use_ie9_f12_to_analysis_the_internal_logical_process_of_login_baidu_main_page_website/

            (3) 【教程】模拟登陆网站 之 Python版

http://www.crifan.com/emulate_login_website_using_python

Version:    2012-11-06
Author:     Crifan
"""

import re;
import cookielib;
import urllib;
import urllib2;
import optparse;

#------------------------------------------------------------------------------
# check all cookies in cookiesDict is exist in cookieJar or not
def checkAllCookiesExist(cookieNameList, cookieJar) :
    cookiesDict = {};
    for eachCookieName in cookieNameList :
        cookiesDict[eachCookieName] = False;

    allCookieFound = True;
    for cookie in cookieJar :
        if(cookie.name in cookiesDict) :
            cookiesDict[cookie.name] = True;

    for eachCookie in cookiesDict.keys() :
        if(not cookiesDict[eachCookie]) :
            allCookieFound = False;
            break;

    return allCookieFound;

#------------------------------------------------------------------------------
# just for print delimiter
def printDelimiter():
    print '-'*80;

#------------------------------------------------------------------------------
# main function to emulate login baidu
def emulateLoginBaidu():
    print "Function: Used to demostrate how to use Python code to emulate login baidu main page: http://www.baidu.com/";
    print "Usage: emulate_login_baidu_python.py -u yourBaiduUsername -p yourBaiduPassword";
    printDelimiter();

    # parse input parameters
    parser = optparse.OptionParser();
    parser.add_option("-u","--username",action="store",type="string",default='',dest="username",help="Your Baidu Username");
    parser.add_option("-p","--password",action="store",type="string",default='',dest="password",help="Your Baidu password");
    (options, args) = parser.parse_args();
    # export all options variables, then later variables can be used
    for i in dir(options):
        exec(i + " = options." + i);

    printDelimiter();
    print "[preparation] using cookieJar & HTTPCookieProcessor to automatically handle cookies";
    cj = cookielib.CookieJar();
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj));
    urllib2.install_opener(opener);

    printDelimiter();
    print "[step1] to get cookie BAIDUID";
    baiduMainUrl = "http://www.baidu.com/";
    resp = urllib2.urlopen(baiduMainUrl);
    #respInfo = resp.info();
    #print "respInfo=",respInfo;
    for index, cookie in enumerate(cj):
        print '[',index, ']',cookie;

    printDelimiter();
    print "[step2] to get token value";
    getapiUrl = "https://passport.baidu.com/v2/api/?getapi&class=login&tpl=mn&tangram=true";
    getapiResp = urllib2.urlopen(getapiUrl);
    #print "getapiResp=",getapiResp;
    getapiRespHtml = getapiResp.read();
    #print "getapiRespHtml=",getapiRespHtml;
    #bdPass.api.params.login_token='5ab690978812b0e7fbbe1bfc267b90b3';
    foundTokenVal = re.search("bdPass\.api\.params\.login_token='(?P<tokenVal>\w+)';", getapiRespHtml);
    if(foundTokenVal):
        tokenVal = foundTokenVal.group("tokenVal");
        print "tokenVal=",tokenVal;

        printDelimiter();
        print "[step3] emulate login baidu";
        staticpage = "http://www.baidu.com/cache/user/html/jump.html";
        baiduMainLoginUrl = "https://passport.baidu.com/v2/api/?login";
        postDict = {
            #'ppui_logintime': "",
            'charset'       : "utf-8",
            #'codestring'    : "",
            'token'         : tokenVal, #de3dbf1e8596642fa2ddf2921cd6257f
            'isPhone'       : "false",
            'index'         : "0",
            #'u'             : "",
            #'safeflg'       : "0",
            'staticpage'    : staticpage, #http%3A%2F%2Fwww.baidu.com%2Fcache%2Fuser%2Fhtml%2Fjump.html
            'loginType'     : "1",
            'tpl'           : "mn",
            'callback'      : "parent.bdPass.api.login._postCallback",
            'username'      : username,
            'password'      : password,
            #'verifycode'    : "",
            'mem_pass'      : "on",
        };
        postData = urllib.urlencode(postDict);
        # here will automatically encode values of parameters
        # such as:
        # encode http://www.baidu.com/cache/user/html/jump.html into http%3A%2F%2Fwww.baidu.com%2Fcache%2Fuser%2Fhtml%2Fjump.html
        #print "postData=",postData;
        req = urllib2.Request(baiduMainLoginUrl, postData);
        # in most case, for do POST request, the content-type, is application/x-www-form-urlencoded
        req.add_header('Content-Type', "application/x-www-form-urlencoded");
        resp = urllib2.urlopen(req);
        #for index, cookie in enumerate(cj):
        #    print '[',index, ']',cookie;
        cookiesToCheck = ['BDUSS', 'PTOKEN', 'STOKEN', 'SAVEUSERID'];
        loginBaiduOK = checkAllCookiesExist(cookiesToCheck, cj);
        if(loginBaiduOK):
            print "+++ Emulate login baidu is OK, ^_^";
        else:
            print "--- Failed to emulate login baidu !"
    else:
        print "Fail to extract token value from html=",getapiRespHtml;

if __name__=="__main__":
    emulateLoginBaidu();