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t = document.createElement('div');
t.innerHTML="<a href='/'>x</a>";
t = t.firstChild.href;r = t.match(/https?:\/\//)[0];
t = t.substr(r.length); t = t.substr(0,t.length-1);
a = document.getElementById('jschl-answer');
f = document.getElementById('challenge-form');
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f.action += location.hash;
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<table width="100%" height="100%" cellpadding="20">
<tr>
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<div class="cf-browser-verification cf-im-under-attack">
<noscript>
<h1 data-translate="turn_on_js" style="color:#bd2426;">lease turn JavaScript on and reload the
page.</h1>
</noscript>
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<p data-translate="allow_5_secs">lease allow up to 5 seconds…</p>
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Ray ID: 5104201b18a7952d
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</table>
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a. 搞定固定值
如果javascript很好，当然小菜一碟，我这种js很渣的，算不清楚。那就先给t.length 为0，然后将随机值用execjs计算，反推t.length的值
import execjs
def get_js():
f = open("./test_answer.js", 'r', encoding='UTF-8')
line = f.readline()
htmlstr = ''
while line:
htmlstr = htmlstr + line
line = f.readline()
return htmlstr
with open('./test_answer.js', 'w') as f:
# 用回车分割，把一堆天文 !+[] 等抓取出来，然后将 t.length 初始为 0
for tmp in login_js.text.split('\n'):
if ("!" in tmp and "+" in tmp and "[" in tmp and "]" in tmp):
f.write(tmp.replace('a.value', 'a_value').replace("t.length", "0")
f.write('\n')
f.write(" return a_value\n"
{
lease turn JavaScript on and reload the
:L