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大多數APP里面返回的是json格式數據，或者一堆加密過的數據。這里以超級課程表APP為例，抓取超級課程表里用戶發的話題。

1、抓取APP數據包

方法詳細可以參考這篇博文：Fiddler如何抓取手機APP數據包

得到超級課程表登錄的地址：http://120.55.151.61/V2/StudentSkip/loginCheckV4.action

表單：

Python爬蟲抓取手機APP的傳輸數據

表單中包括了用戶名和密碼，當然都是加密過了的，還有一個設備信息，直接post過去就是。

另外必須加header,一開始我沒有加header得到的是登錄錯誤，所以要帶上header信息。

Python爬蟲抓取手機APP的傳輸數據

2、登錄

登錄代碼：

				?

									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

登錄成功會返回一串賬號信息的json數據

Python爬蟲抓取手機APP的傳輸數據

和抓包時返回數據一樣，證明登錄成功

Python爬蟲抓取手機APP的傳輸數據

3、抓取數據

用同樣方法得到話題的url和post參數

做法就和模擬登錄網站一樣。詳見：Python爬蟲模擬登錄帶驗證碼網站

下見最終代碼，有主頁獲取和下拉加載更新。可以無限加載話題內容。

				?

									#!/usr/local/bin/python2.7

									# -*- coding: utf8 -*-

									"""

									超級課程表話題抓取

									"""

									import urllib2

									from cookielib import CookieJar

									import json

									''' 讀Json數據 '''

									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

									''' 加載更多 '''

									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',

									}

									''' ---登錄部分--- '''

									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

									''' ---獲取話題--- '''

									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)