如何在动态生成的Web请求中伪造Cookie？

Question

I need to get some public data from a link, but this is a second time I encounter a Cookie that I cannot replicate as some values in it are dynamic. How can I get this cookie before doing an actual request to get my data?

Example link:

https://www.blackrock.com/ca/individual/en/products/239832/ishares-sptsx-60-index-etf/1464253357804.ajax?tab=chart

Example headers:

Host: www.blackrock.com
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Accept: */*
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Referer: https://www.blackrock.com/ca/individual/en/products/239832/ishares-sptsx-60-index-etf
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.8
Cookie: JSESSION_amer-retail01=EA5A098E120F4E3FAD2C994A64F292E4.03; ts-ca-one-locale=en_CA; FIRSTPAGE_ca_ca-one=page-class-home; blkUserType-ca-one=individual; ipe_s=0d9c807a-04cc-ae5b-e459-d89bddd2faab; ca-one-recent-funds=239832; __utmt=1; __utma=17023466.874636303.1499433731.1499433731.1499433731.1; __utmb=17023466.5.10.1499433731; __utmc=17023466; __utmz=17023466.1499433731.1.1.utmcsr=google|utmgclid=CJjax_ah99QCFZxMDQodKQ4NxQ|utmgclsrc=aw.ds|utmccn=(not%20set)|utmcmd=(not%20set)|utmctr=(not%20provided); _bizo_bzid=0688d0c2-d203-488b-b128-94c0406b5568; _bizo_cksm=B16C1965883E71EB; _bizo_np_stats=14%3D243%2C; ipe.20668.pageViewedCount=3; utag_main=v_id:015d1d3702f6001b054da00951140407300ad06b00bd0$_sn:1$_ss:0$_pn:6%3Bexp-session$_st:1499436924463$ses_id:1499433730806%3Bexp-session; s_pers=%20s_fid%3D5295C92DBD9DC781-0177F2F787EC9066%7C1562507124793%3B%20gpv%3Dca-one%257Cca%257Cfund%257Cishares%2520s%2526p%252Ftsx%252060%2520index%2520etf%257Cxiu%7C1499436924795%3B%20s_nr%3D1499435124796-New%7C1530971124796%3B%20s_pers_eVar17%3Dprospect%7C1502027124797%3B%20s_pers_prop19%3Danonymous%7C1502027124799%3B; s_sess=%20s_campaign%3Dppc%253Ablackrock_ca%253Agoogle%253Ablackrock%3B%20s_cc%3Dtrue%3B%20s_sq%3D%3B; s_vi=[CS]v1|2CAFC5818507C33B-6000011540002202[CE]

Answer 1

You can instantiate a CookieContainer and set it to the CookieContainer property of your HttpWebRequest . Then make an initial request and after you GetResponse the cookie container will be populated with any cookies returned.

Then reuse the CookieContainer in subsequent requests and all the previous returned cookies will be sent.