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今日头条爬虫技术说明

整体思路

  1. 抓取今日头条app的数据包
  2. 分析数据包，找出请求的数据（如文章列表，文章url等）
  3. 根据文章url等信息，抓取文章内容
  4. 若文章中包含视频，则取视频url，然后下载

具体实现

一、抓包

  1. 工具：Fiddler、 android手机、google浏览器

  2. 步骤：
    （1）本示例采用Fiddler来抓包，安装到电脑，我的电脑是win10

    （2）具体配置及使用请见http://jingyan.baidu.com/article/03b2f78c7b6bb05ea237aed2.html

    （3）打开今日头条app，开始抓包，抓取到的包如下：

    （4）经分析得知左侧的json文件及为文章列表，如图

    如右侧第一个content所指的json文件，文件内容为此时手机上的信息为

    可得上面的结论正确

二、分析

  1. 分析所抓到的文章列表数据包：大致分为两类，一类是有视频的文章，一类则是没有视频的文章。 有视频的文章json内容里均有video_id这个key，如下图所示：

  2. 没有视频的文章：json文件内容均包含title、 abstract、 article_url等信息，具体内容如下.

     {
     "read_count":7089,
     "media_name":"数码日记",
     "ban_comment":0,
     "abstract":"一般情况下，购买手机后我们都会买SIM卡，这是无可厚非的事情。但也有些网友买手机仅仅是作为备用机，用于日常上网使用，而在没有SIM卡的情况下，手机要想联网，只能通过连接Wi-Fi的方式实现。",
     "image_list":[
         {
             "url":"http://p1.pstatp.com/list/ef6000f83af6113a252",
             "width":698,
             "url_list":[
                 {
                     "url":"http://p1.pstatp.com/list/ef6000f83af6113a252"
                 },
                 {
                     "url":"http://p4.pstatp.com/list/ef6000f83af6113a252"
                 },
                 {
                     "url":"http://p.pstatp.com/list/ef6000f83af6113a252"
                 }
             ],
             "uri":"list/ef6000f83af6113a252",
             "height":392
         },
         {
             "url":"http://p3.pstatp.com/list/ef6000f83f79a941883",
             "width":981,
             "url_list":[
                 {
                     "url":"http://p3.pstatp.com/list/ef6000f83f79a941883"
                 },
                 {
                     "url":"http://p6.pstatp.com/list/ef6000f83f79a941883"
                 },
                 {
                     "url":"http://p.pstatp.com/list/ef6000f83f79a941883"
                 }
             ],
             "uri":"list/ef6000f83f79a941883",
             "height":551
         },
         {
             "url":"http://p3.pstatp.com/list/ef6000f8405551c32f2",
             "width":943,
             "url_list":[
                 {
                     "url":"http://p3.pstatp.com/list/ef6000f8405551c32f2"
                 },
                 {
                     "url":"http://p6.pstatp.com/list/ef6000f8405551c32f2"
                 },
                 {
                     "url":"http://p.pstatp.com/list/ef6000f8405551c32f2"
                 }
             ],
             "uri":"list/ef6000f8405551c32f2",
             "height":530
         }
     ],
     "has_video":false,
     "article_type":0,
     "tag":"digital",
     "has_m3u8_video":0,
     "keywords":"MIUI,SIM卡,Wi-Fi",
     "user_verified":1,
     "aggr_type":1,
     "cell_type":0,
     "article_sub_type":0,
     "bury_count":0,
     "title":"​不插SIM卡，不用Wi-Fi，小米手机也能上网",
     "ignore_web_transform":1,
     "source_icon_style":1,
     "tip":0,
     "hot":0,
     "share_url":"http://toutiao.com/a6351618096909779201/?iid=6181230843&app=news_article",
     "has_mp4_video":0,
     "source":"数码日记",
     "comment_count":22,
     "article_url":"http://toutiao.com/group/6351618096909779201/",
     "filter_words":[
         {
             "id":"8:0",
             "name":"重复、旧闻",
             "is_selected":false
         },
         {
             "id":"9:1",
             "name":"内容质量差",
             "is_selected":false
         },
         {
             "id":"5:32370023",
             "name":"来源:数码日记",
             "is_selected":false
         },
         {
             "id":"2:306461588",
             "name":"路由器",
             "is_selected":false
         },
         {
             "id":"6:47522",
             "name":"小米手机",
             "is_selected":false
         }
     ],
     "publish_time":1478851309,
     "action_list":[
         {
             "action":1,
             "extra":{
 
             },
             "desc":""
         },
         {
             "action":3,
             "extra":{
 
             },
             "desc":""
         },
         {
             "action":7,
             "extra":{
 
             },
             "desc":""
         },
         {
             "action":9,
             "extra":{
 
             },
             "desc":""
         }
     ],
     "gallary_image_count":4,
     "cell_layout_style":1,
     "tag_id":6351618096909779000,
     "video_style":0,
     "verified_content":"头条问答数码专家，安卓领域老兵",
     "display_url":"http://toutiao.com/group/6351618096909779201/",
     "large_image_list":[
 
     ],
     "item_id":6351618007961175000,
     "repin_count":117,
     "cell_flag":11,
     "user_info":{
         "user_id":3378232303,
         "name":"数码日记",
         "verified_content":"头条问答数码专家，安卓领域老兵",
         "avatar_url":"http://p3.pstatp.com/thumb/1209/1834968385",
         "follow":false,
         "user_verified":true,
         "description":""
     },
     "source_open_url":"sslocal://media_account?media_id=3392972202",
     "level":0,
     "digg_count":0,
     "behot_time":1478855948,
     "cursor":1478855948999,
     "url":"http://toutiao.com/group/6351618096909779201/",
     "preload_web":1,
     "user_repin":0,
     "has_image":true,
     "item_version":0,
     "media_info":{
         "user_id":3378232303,
         "verified_content":"",
         "avatar_url":"http://p2.pstatp.com/large/1209/1834968385",
         "media_id":3392972202,
         "name":"数码日记",
         "follow":false,
         "recommend_reason":"",
         "is_star_user":false,
         "user_verified":true
     },
     "group_id":6351618096909779000,
     "middle_image":{
         "url":"http://p1.pstatp.com/list/ef6000f83af6113a252",
         "width":698,
         "url_list":[
             {
                 "url":"http://p1.pstatp.com/list/ef6000f83af6113a252"
             },
             {
                 "url":"http://p4.pstatp.com/list/ef6000f83af6113a252"
             },
             {
                 "url":"http://p.pstatp.com/list/ef6000f83af6113a252"
             }
         ],
         "uri":"list/ef6000f83af6113a252",
         "height":392
     }
 }

  3. 有视频的文章：json文件内容均包含title、 abstract、 article_url等信息，具体内容如下。我们可访问article_url,经过多次采样暂得出今日头条的视频均为内连接。

     {
     "read_count":146886,
     "video_id":"5419c21565a643c7b84ca101ec202087",
     "media_name":"快娱乐",
     "ban_comment":0,
     "abstract":"谢谢观看，欢迎订阅",
     "video_detail_info":{
         "show_pgc_subscribe":1,
         "video_preloading_flag":1,
         "group_flags":32832,
         "direct_play":1,
         "detail_video_large_image":{
             "url":"http://p1.pstatp.com/video1609/f8a0006db230575a16a",
             "width":580,
             "url_list":[
                 {
                     "url":"http://p1.pstatp.com/video1609/f8a0006db230575a16a"
                 },
                 {
                     "url":"http://p4.pstatp.com/video1609/f8a0006db230575a16a"
                 },
                 {
                     "url":"http://p.pstatp.com/video1609/f8a0006db230575a16a"
                 }
             ],
             "uri":"video1609/f8a0006db230575a16a",
             "height":326
         },
         "video_id":"5419c21565a643c7b84ca101ec202087",
         "video_watch_count":131308,
         "video_type":0,
         "video_watching_count":0
     },
     "image_list":[
 
     ],
     "has_video":true,
     "article_type":0,
     "tag":"news_military",
     "has_m3u8_video":0,
     "video_duration":149,
     "user_verified":0,
     "aggr_type":1,
     "cell_type":0,
     "article_sub_type":0,
     "group_flags":32832,
     "bury_count":70,
     "title":"教官训练女兵，反被女兵打",
     "ignore_web_transform":1,
     "source_icon_style":4,
     "tip":0,
     "hot":0,
     "share_url":"http://toutiao.com/a6349548387310305537/?iid=6181230843&app=news_article",
     "has_mp4_video":0,
     "source":"快娱乐",
     "comment_count":64,
     "article_url":"http://toutiao.com/group/6349548387310305537/",
     "filter_words":[
         {
             "id":"8:0",
             "name":"重复、旧闻",
             "is_selected":false
         },
         {
             "id":"9:1",
             "name":"内容质量差",
             "is_selected":false
         },
         {
             "id":"5:62489742",
             "name":"来源:快娱乐",
             "is_selected":false
         },
         {
             "id":"1:1648",
             "name":"军事",
             "is_selected":false
         },
         {
             "id":"6:17453",
             "name":"女兵",
             "is_selected":false
         }
     ],
     "video_play_info":"{"status":10,"message":"success","video_duration":149.6,"video_list":{"video_1":{"definition":"360p","vtype":"mp4","vwidth":640,"vheight":282,"bitrate":401498,"size":8828747,"main_url":"aHR0cDovL3Y2LnBzdGF0cC5jb20vdmlkZW8vYy9lY2JjZjhlNGVkMjc0ZTUwOWY1MWU3MjI2MzA0Y2NjMi8/RXhwaXJlcz0xNDc4ODU5NzY4JkFXU0FjY2Vzc0tleUlkPXFoMGg5VGRjRU1ybTFWbFIyYWQlMkYmU2lnbmF0dXJlPXZ2eWdnTDRkQTRrVGdJSHNHMEdENnN3NnUlMkJFJTNE","backup_url_1":"aHR0cDovL3Y0LnBzdGF0cC5jb20vMDZlZWY4NzU1NDVmMDUyMzk2YTk4NGQ1N2JiOTllODUvNTgyNThkZTgvdmlkZW8vYy9lY2JjZjhlNGVkMjc0ZTUwOWY1MWU3MjI2MzA0Y2NjMi8=","preload_size":327680,"play_load_min_step":2,"play_load_max_step":10},"video_2":{"definition":"480p","vtype":"mp4","vwidth":854,"vheight":376,"bitrate":609772,"size":12723821,"main_url":"aHR0cDovL3Y3LnBzdGF0cC5jb20vNzU5M2E4MzRkYmQ3YWRlYTFjZWZlYzNiMjczYTgzY2YvNTgyNThkZTgvdmlkZW8vYy8yOTdiYmZkMzlhZTU0NDk1YjFmOGJiODJmMmVjZDIyYi8=","backup_url_1":"aHR0cDovL3Y2LnBzdGF0cC5jb20vdmlkZW8vYy8yOTdiYmZkMzlhZTU0NDk1YjFmOGJiODJmMmVjZDIyYi8/RXhwaXJlcz0xNDc4ODU5NzY4JkFXU0FjY2Vzc0tleUlkPXFoMGg5VGRjRU1ybTFWbFIyYWQlMkYmU2lnbmF0dXJlPWx4TWZpYmZvSkIyUUladUxkMjJYQktKQ2dWRSUzRA==","preload_size":327680,"play_load_min_step":2,"play_load_max_step":10},"video_3":{"definition":"720p","vtype":"mp4","vwidth":952,"vheight":420,"bitrate":795675,"size":16199930,"main_url":"aHR0cDovL3Y3LnBzdGF0cC5jb20vOGU3MmU3Yzk5YjAwMjg5ZjM0ODkzMTNiM2RkNjlmNDYvNTgyNThkZTgvdmlkZW8vYy9kN2Y0MjQwNWZlY2E0ZDY2YmI0NjMyYzllYmY1NTYwNy8=","backup_url_1":"aHR0cDovL3Y2LnBzdGF0cC5jb20vdmlkZW8vYy9kN2Y0MjQwNWZlY2E0ZDY2YmI0NjMyYzllYmY1NTYwNy8/RXhwaXJlcz0xNDc4ODU5NzY4JkFXU0FjY2Vzc0tleUlkPXFoMGg5VGRjRU1ybTFWbFIyYWQlMkYmU2lnbmF0dXJlPUZDakVUc29vcThoZFF3T1ppRFplTHh4S1QlMkZnJTNE","preload_size":327680,"play_load_min_step":2,"play_load_max_step":10}}}",
     "publish_time":1478370922,
     "action_list":[
         {
             "action":1,
             "extra":{
 
             },
             "desc":""
         },
         {
             "action":3,
             "extra":{
 
             },
             "desc":""
         },
         {
             "action":7,
             "extra":{
 
             },
             "desc":""
         },
         {
             "action":9,
             "extra":{
 
             },
             "desc":""
         }
     ],
     "cell_layout_style":1,
     "tag_id":6349548387310305000,
     "video_style":0,
     "verified_content":"",
     "display_url":"http://toutiao.com/group/6349548387310305537/",
     "large_image_list":[
 
     ],
     "item_id":6349554764748948000,
     "repin_count":644,
     "cell_flag":11,
     "user_info":{
         "user_id":6380739542,
         "name":"快娱乐",
         "verified_content":"",
         "avatar_url":"http://p1.pstatp.com/thumb/6cb001cda8a0c6718e0",
         "follow":false,
         "user_verified":false,
         "description":""
     },
     "source_open_url":"sslocal://media_account?media_id=6382924961",
     "level":0,
     "like_count":167,
     "digg_count":167,
     "behot_time":1478855563,
     "cursor":1478855563999,
     "url":"http://toutiao.com/group/6349548387310305537/",
     "preload_web":0,
     "user_repin":0,
     "has_image":false,
     "item_version":0,
     "media_info":{
         "user_id":6380739542,
         "verified_content":"",
         "avatar_url":"http://p2.pstatp.com/large/6cb001cda8a0c6718e0",
         "media_id":6382924961,
         "name":"快娱乐",
         "follow":false,
         "recommend_reason":"",
         "is_star_user":false,
         "user_verified":false
     },
     "group_id":6349548387310305000,
     "middle_image":{
         "url":"http://p1.pstatp.com/list/f8a0006db230575a16a",
         "width":640,
         "url_list":[
             {
                 "url":"http://p1.pstatp.com/list/f8a0006db230575a16a"
             },
             {
                 "url":"http://p4.pstatp.com/list/f8a0006db230575a16a"
             },
             {
                 "url":"http://p.pstatp.com/list/f8a0006db230575a16a"
             }
         ],
         "uri":"list/f8a0006db230575a16a",
         "height":282
     }
 }

  4. 下载视频：访问article_url 到文章页面，分析并求得视频url，然后下载。 具体如下：

    （1）拿http://www.toutiao.com/a6345277767186268418/为例，用谷歌浏览器打开该网页，内容如图：按F12可检查视频url，如图：经次刷新，检查视频地址，如下：

     http://v4.pstatp.com/f8da252eabe1c04285e88d59d5456f77/58202d03/video/c/d77569e2c637407180e5410d89a8a1b6/

 http://v4.pstatp.com/a78185c3924c7a43a197a64ecbfc0325/58203cf5/video/c/d77569e2c637407180e5410d89a8a1b6/
 
 http://v6.pstatp.com/video/c/d77569e2c637407180e5410d89a8a1b6/?Signature=%2BO79a1MPRqjDF6mX3k%2BMfI4glQM%3D&Expires=1478511382&KSSAccessKeyId=qh0h9TdcEMrm1VlR2ad/
 
 http://v6.pstatp.com/video/c/d77569e2c637407180e5410d89a8a1b6/?Signature=WegICc2e0Xcb%2FxuriBVw7SxtZfY%3D&Expires=1478511397&KSSAccessKeyId=qh0h9TdcEMrm1VlR2a
 
 http://v4.pstatp.com/68bff4aaceee235cbda85420869ee25a/58203d2b/video/c/d77569e2c637407180e5410d89a8a1b6/d/
 
 http://v6.pstatp.com/video/c/d77569e2c637407180e5410d89a8a1b6/?Signature=H6jlwWrc6MZAFQ8eqn5h8C0qJXw%3D&Expires=1478511498&KSSAccessKeyId=qh0h9TdcEMrm1VlR2ad/

    可知同一个视频，地址是即时的，每次都在变化，再访问以前的地址就被拒绝了，因此在求得url后需要立即下载。

    （2）程序取视频url：由第3点有视频的文章下面陈列出的json文件可知，我们可以取到加密后的视频url，如：

     "main_url":"aHR0cDovL3Y3LnBzdGF0cC5jb20vOGU3MmU3Yzk5YjAwMjg5ZjM0ODkzMTNiM2RkNjlmNDYvNTgyNThkZTgvdmlkZW8vYy9kN2Y0MjQwNWZlY2E0ZDY2YmI0NjMyYzllYmY1NTYwNy8="

    那么是否可以将这个加密后的url解密？既然谷歌浏览器检查到的视频url是解密后的，那么我想前台可能会有解密的方法，继续用谷歌浏览器检查该网页，点击Network，观察网页在加载时所请求的文件，如图：据分析得出tt-video.js文件与视频有关，查看该文件的源代码，找到如下解密url的函数

     //参数为main_url
 //返回解密后的url
 function base64decode (e) {
     var t, r, n, o, i, a, u, l = [ - 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1];
     for (a = e.length, i = 0, u = ""; i < a;) {
         do t = l[255 & e.charCodeAt(i++)];
         while (i < a && t == -1);
         if (t == -1) break;
         do r = l[255 & e.charCodeAt(i++)];
         while (i < a && r == -1);
         if (r == -1) break;
         u += String.fromCharCode(t << 2 | (48 & r) >> 4);
         do {
             if (n = 255 & e.charCodeAt(i++), 61 == n) return u;
             n = l[n]
         } while ( i < a && n == - 1 );
         if (n == -1) break;
         u += String.fromCharCode((15 & r) << 4 | (60 & n) >> 2);
         do {
             if (o = 255 & e.charCodeAt(i++), 61 == o) return u;
             o = l[o]
         } while ( i < a && o == - 1 );
         if (o == -1) break;
         u += String.fromCharCode((3 & n) << 6 | o)
     }
     return u
 }

    取到视频url后，我们就可以下载该视频了，下载视频代码如下：

     import os
 import urllib

 def downloadFile(url, filename):
     directory = os.path.dirname(filename)
     mkdir_p(directory)
     urllib.urlretrieve(url, filename)

  5. 加载等多文章：当上拉查看更多文章时，经过抓包我们可以发现app请求的是同一个url只是参数有些变化，如图：

    我们拿两个请求来举例

    请求一

     http://is.snssdk.com/api/news/feed/v47/?category=video&refer=1&count=20&min_behot_time=1478077174&last_refresh_sub_entrance_interval=1478077371&loc_mode=6&loc_time=1478076298&latitude=39.90511&longitude=116.355647&city=%E5%8C%97%E4%BA%AC%E5%B8%82&tt_from=pull&lac=4124&cid=43070&cp=53841b92aebbbq1&iid=6060889792&device_id=33418245041&ac=wifi&channel=xiaomi&aid=13&app_name=news_article&version_code=584&version_name=5.8.4&device_platform=android&ab_version=87590%2C86575%2C83095%2C86231%2C86001%2C79287%2C87752%2C87331%2C85046%2C86854%2C88106%2C87982%2C88088%2C87881%2C82679%2C87838%2C88067%2C87804%2C87828%2C87030%2C87498%2C87035%2C86724%2C87988&ab_client=a1%2Cc4%2Ce1%2Cf2%2Cg2%2Cf7&ab_feature=z1&abflag=3&ssmix=a&device_type=MI+2A&device_brand=Xiaomi&language=zh&os_api=16&os_version=4.1.1&uuid=860954025518090&openudid=60fcf5fe7e721c17&manifest_version_code=584&resolution=720*1280&dpi=320&update_version_code=5844&_rticket=1478077371937

    请求二

     http://is.snssdk.com/api/news/feed/v47/?category=video&refer=1&count=20&max_behot_time=1478074962&last_refresh_sub_entrance_interval=1478077377&loc_mode=6&loc_time=1478076298&latitude=39.90511&longitude=116.355647&city=%E5%8C%97%E4%BA%AC%E5%B8%82&tt_from=pre_load_more&lac=4124&cid=43070&cp=55841d9ba3bc1q1&iid=6060889792&device_id=33418245041&ac=wifi&channel=xiaomi&aid=13&app_name=news_article&version_code=584&version_name=5.8.4&device_platform=android&ab_version=87590%2C86575%2C83095%2C86231%2C86001%2C79287%2C87752%2C87331%2C85046%2C86854%2C88106%2C87982%2C88088%2C87881%2C82679%2C87838%2C88067%2C87804%2C87828%2C87030%2C87498%2C87035%2C86724%2C87988&ab_client=a1%2Cc4%2Ce1%2Cf2%2Cg2%2Cf7&ab_feature=z1&abflag=3&ssmix=a&device_type=MI+2A&device_brand=Xiaomi&language=zh&os_api=16&os_version=4.1.1&uuid=860954025518090&openudid=60fcf5fe7e721c17&manifest_version_code=584&resolution=720*1280&dpi=320&update_version_code=5844&_rticket=1478077377769

    为了看清楚一些，把参数单独列出如下

     concern_id  6286225228934679042
 refer   1
 count   20
 max_behot_time  1478067863
 last_refresh_sub_entrance_interval  1478075051
 loc_mode    6
 loc_time    1478072878
 latitude    39.90511
 longitude   116.355647
 city    北京市
 tt_from pre_load_more
 lac 4124
 cid 43070
 cp  59831b9fa22abq1
 iid 6060889792
 device_id   33418245041
 ac  wifi
 channel xiaomi
 aid 13
 app_name    news_article
 version_code    584
 version_name    5.8.4
 device_platform android
 ab_version  87590,86575,83095,86231,86001,79287,87752,87331,85046,86854,88106,87982,88088,87881,82679,87838,88067,87804,87828,87030,87498,87035,86724,87988
 ab_client   a1,c4,e1,f2,g2,f7
 ab_feature  z1
 abflag  3
 ssmix   a
 device_type MI 2A
 device_brand    Xiaomi
 language    zh
 os_api  16
 os_version  4.1.1
 uuid    860954025518090
 openudid    60fcf5fe7e721c17
 manifest_version_code   584
 resolution  720*1280
 dpi 320
 update_version_code 5844
 _rticket    1478075051350

    经过相互对比，我们可知变化的参数为

     max_behot_time  1478073762 #截止这个时间段的头条
 cp  548a1492afbc3q1  #虽然改变但不影响显示结果 不用管
 last_refresh_sub_entrance_interval  1478077379 #当前时间  精确到秒
 _rticket    1478077379699 #当前时间  精确到毫秒

    因此我们只需要拼出这个地址，就可以加载更多文章了。

数据库 MongoDB

数据库名：headlines_today

urls表

字段名 数据类型 长度 说明 描述
title 标题
url url
status 状态
origin 来源

子标签表app_column_info:

字段名 数据类型 长度 说明 描述
COLUMN_ID
COLUMN_NAME

子标签表app_content_info:

字段名 数据类型 长度 说明 描述
column_id APP子栏目ID
title
original_url 文章（视听节目）原始地址
release_time
content
abstract_image_url
image_local_path
video_url
video_local_path
is_audio
is_download
create_time

headlines_today's People

Contributors

boris0621 avatar

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