"http://www.zhihu.com/api/v3/feed/topstory?before_id=59&limit=10&session_token=b0738524ecd187a27c3d7fb52a05377a&action=pull&action_feed=True&desktop=true"

我发现知乎的数据是用ajax，动态填充的，并不是静态的网页。 在抓取知乎提问的相关数据时，我发现前端的ajax是从上面这个地方取的数据。 然而我自己带着cookie取访问这个API时，还是遇到401。 

https://www.zhihu.com/api/v4/questions/28530832/answers?sort_by=default&include=data%5B%2A%5D.is_normal%2Cadmin_closed_comment%2Creward_info%2Cis_collapsed%2Cannotation_action%2Cannotation_detail%2Ccollapse_reason%2Cis_sticky%2Ccollapsed_by%2Csuggest_edit%2Ccomment_count%2Ccan_comment%2Ccontent%2Ceditable_content%2Cvoteup_count%2Creshipment_settings%2Ccomment_permission%2Ccreated_time%2Cupdated_time%2Creview_info%2Cquestion%2Cexcerpt%2Crelationship.is_authorized%2Cis_author%2Cvoting%2Cis_thanked%2Cis_nothelp%2Cupvoted_followees%3Bdata%5B%2A%5D.mark_infos%5B%2A%5D.url%3Bdata%5B%2A%5D.author.follower_count%2Cbadge%5B%3F%28type%3Dbest_answerer%29%5D.topics&limit=20&offset=23

但是这个API，带着cookie就可以直接拿到回答的数据。