python爬app_Python爬蟲：抓取手機APP的資料

分享一篇文章，原文來自：j_hao104的個人頁面。

摘要

大多數APP裡面傳回的是json格式資料，或者一堆加密過的資料 。這裡以超級課程表APP為例，抓取超級課程表裡使用者發的話題。

1.抓取APP資料包

方法詳細可以參考這篇博文：http://my.oschina.net/jhao104/blog/605963

得到超級課程表登入的位址：http://120.55.151.61/V2/StudentSkip/loginCheckV4.action

表單：

image.png

表單中包括了使用者名和密碼，當然都是加密過了的，還有一個裝置資訊，直接post過去就是。

另外必須加header,一開始我沒有加header得到的是登入錯誤，是以要帶上header資訊。

image.png

3.登入

登入代碼：

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

登入成功 會傳回一串賬号資訊的json資料

image

和抓包時傳回資料一樣，證明登入成功

image.png

3.抓取資料

用同樣方法得到話題的url和post參數

下見最終代碼，有首頁擷取和下拉加載更新。可以無限加載話題内容。

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

# -*- coding: utf8 -*-

# python學習交流群：103456743

""" 超級課程表話題抓取 """

import urllib2

from cookielib import CookieJar

import json

''' 讀Json資料 ''' 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',

}

''' ---登入部分--- '''

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

''' ---擷取話題--- '''

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：

image.png