Python爬虫抓取手机APP的传输数据

大多数APP里面返回的是json格式数据，或者一堆加密过的数据 。这里以超级课程表APP为例，抓取超级课程表里用户发的话题。

1、抓取APP数据包

方法详细可以参考这篇博文：Fiddler如何抓取手机APP数据包

得到超级课程表登录的地址：http://120.55.151.61/V2/StudentSkip/loginCheckV4.action

表单：

表单中包括了用户名和密码，当然都是加密过了的，还有一个设备信息，直接post过去就是。

另外必须加header,一开始我没有加header得到的是登录错误，所以要带上header信息。

2、登录

登录代码：

    import urllib2
    from cookielib import CookieJar
    loginUrl = 'http://120.55.151.61/V2/StudentSkip/loginCheckV4.action'
    headers = {
    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    'User-Agent': 'Dalvik/1.6.0 (Linux; U; Android 4.1.1; M040 Build/JRO03H)',
    'Host': '120.55.151.61',
    'Connection': 'Keep-Alive',
    'Accept-Encoding': 'gzip',
    'Content-Length': '207',
    }
    loginData = 'phoneBrand=Meizu&platform;=1&deviceCode;=868033014919494&account;=FCF030E1F2F6341C1C93BE5BBC422A3D&phoneVersion;=16&password;=A55B48BB75C79200379D82A18C5F47D6&channel;=MXMarket&phoneModel;=M040&versionNumber;=7.2.1&'
    cookieJar = CookieJar()
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookieJar))
    req = urllib2.Request(loginUrl, loginData, headers)
    loginResult = opener.open(req).read()
    print loginResult

登录成功 会返回一串账号信息的json数据

和抓包时返回数据一样，证明登录成功

3、抓取数据

用同样方法得到话题的url和post参数

做法就和模拟登录网站一样。详见：Python爬虫模拟登录带验证码网站

下见最终代码，有主页获取和下拉加载更新。可以无限加载话题内容。

    #!/usr/local/bin/python2.7
    # -*- coding: utf8 -*-
    """
    超级课程表话题抓取
    """
    import urllib2
    from cookielib import CookieJar
    import json
    ''' 读Json数据 '''
    def fetch_data(json_data):
    data = json_data['data']
    timestampLong = data['timestampLong']
    messageBO = data['messageBOs']
    topicList = []
    for each in messageBO:
    topicDict = {}
    if each.get('content', False):
    topicDict['content'] = each['content']
    topicDict['schoolName'] = each['schoolName']
    topicDict['messageId'] = each['messageId']
    topicDict['gender'] = each['studentBO']['gender']
    topicDict['time'] = each['issueTime']
    print each['schoolName'],each['content']
    topicList.append(topicDict)
    return timestampLong, topicList
    ''' 加载更多 '''
    def load(timestamp, headers, url):
    headers['Content-Length'] = '159'
    loadData = 'timestamp=%s&phoneBrand;=Meizu&platform;=1&genderType;=-1&topicId;=19&phoneVersion;=16&selectType;=3&channel;=MXMarket&phoneModel;=M040&versionNumber;=7.2.1&' % timestamp
    req = urllib2.Request(url, loadData, headers)
    loadResult = opener.open(req).read()
    loginStatus = json.loads(loadResult).get('status', False)
    if loginStatus == 1:
    print 'load successful!'
    timestamp, topicList = fetch_data(json.loads(loadResult))
    load(timestamp, headers, url)
    else:
    print 'load fail'
    print loadResult
    return False
    loginUrl = 'http://120.55.151.61/V2/StudentSkip/loginCheckV4.action'
    topicUrl = 'http://120.55.151.61/V2/Treehole/Message/getMessageByTopicIdV3.action'
    headers = {
    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    'User-Agent': 'Dalvik/1.6.0 (Linux; U; Android 4.1.1; M040 Build/JRO03H)',
    'Host': '120.55.151.61',
    'Connection': 'Keep-Alive',
    'Accept-Encoding': 'gzip',
    'Content-Length': '207',
    }
    ''' ---登录部分--- '''
    loginData = 'phoneBrand=Meizu&platform;=1&deviceCode;=868033014919494&account;=FCF030E1F2F6341C1C93BE5BBC422A3D&phoneVersion;=16&password;=A55B48BB75C79200379D82A18C5F47D6&channel;=MXMarket&phoneModel;=M040&versionNumber;=7.2.1&'
    cookieJar = CookieJar()
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookieJar))
    req = urllib2.Request(loginUrl, loginData, headers)
    loginResult = opener.open(req).read()
    loginStatus = json.loads(loginResult).get('data', False)
    if loginResult:
    print 'login successful!'
    else:
    print 'login fail'
    print loginResult
    ''' ---获取话题--- '''
    topicData = 'timestamp=0&phoneBrand;=Meizu&platform;=1&genderType;=-1&topicId;=19&phoneVersion;=16&selectType;=3&channel;=MXMarket&phoneModel;=M040&versionNumber;=7.2.1&'
    headers['Content-Length'] = '147'
    topicRequest = urllib2.Request(topicUrl, topicData, headers)
    topicHtml = opener.open(topicRequest).read()
    topicJson = json.loads(topicHtml)
    topicStatus = topicJson.get('status', False)
    print topicJson
    if topicStatus == 1:
    print 'fetch topic success!'
    timestamp, topicList = fetch_data(topicJson)
    load(timestamp, headers, topicUrl)

结果：