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
得到超級課程表登錄的地址：http://120.55.151.61/V2/StudentSkip/loginCheckV4.action
表單：
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。
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
和抓包時返回數據一樣，證明登錄成功
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：http://my.oschina.net/jhao104/blog/547311
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)結果：
