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。
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。
登录
登录代码：
importurllib2fromcookielibimportCookieJar 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()printloginResult
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
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
"""importurllib2fromcookielibimportCookieJarimportjson''' 读Json数据 '''deffetch_data(json_data):data = json_data['data'] timestampLong = data['timestampLong'] messageBO = data['messageBOs'] topicList = []foreachinmessageBO: topicDict = {}ifeach.get('content',False): topicDict['content'] = each['content'] topicDict['schoolName'] = each['schoolName'] topicDict['messageId'] = each['messageId'] topicDict['gender'] = each['studentBO']['gender'] topicDict['time'] = each['issueTime']printeach['schoolName'],each['content'] topicList.append(topicDict)returntimestampLong, topicList''' 加载更多 '''defload(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)ifloginStatus ==1:print'load successful!'timestamp, topicList = fetch_data(json.loads(loadResult)) load(timestamp, headers, url)else:print'load fail'printloadResultreturnFalseloginUrl ='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)ifloginResult:print'login successful!'else:print'login fail'printloginResult''' ---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)printtopicJsoniftopicStatus ==1:print'fetch topic success!'timestamp, topicList = fetch_data(topicJson) load(timestamp, headers, topicUrl)
结果：
