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你以为Python爬虫只能爬取网页数据吗?APP也是可以的呢!

你以为Python爬虫只能爬取网页数据吗?APP也是可以的呢!

作者: 919b0c54458f | 来源:发表于2018-12-06 14:09 被阅读23次

    摘要

    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:http://my.oschina.net/jhao104/blog/605963

    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:http://my.oschina.net/jhao104/blog/547311

    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:

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