bazarr/libs/cloudscraper/interpreters/nodejs.py

47 lines
2.0 KiB
Python

import base64
import logging
import subprocess
from . import JavaScriptInterpreter
##########################################################################################################################################################
BUG_REPORT = 'Cloudflare may have changed their technique, or there may be a bug in the script.'
##########################################################################################################################################################
class ChallengeInterpreter(JavaScriptInterpreter):
def __init__(self):
super(ChallengeInterpreter, self).__init__('nodejs')
def eval(self, jsEnv, js):
try:
js = 'var atob = function(str) {return Buffer.from(str, "base64").toString("binary");};' \
'var challenge = atob("%s");' \
'var context = {atob: atob};' \
'var options = {filename: "iuam-challenge.js", timeout: 4000};' \
'var answer = require("vm").runInNewContext(challenge, context, options);' \
'process.stdout.write(String(answer));' \
% base64.b64encode('{}{}'.format(jsEnv, js).encode('UTF-8')).decode('ascii')
return subprocess.check_output(['node', '-e', js])
except OSError as e:
if e.errno == 2:
raise EnvironmentError(
'Missing Node.js runtime. Node is required and must be in the PATH (check with `node -v`). Your Node binary may be called `nodejs` rather than `node`, '
'in which case you may need to run `apt-get install nodejs-legacy` on some Debian-based systems. (Please read the cloudscraper'
' README\'s Dependencies section: https://github.com/VeNoMouS/cloudscraper#dependencies.'
)
raise
except Exception:
logging.error('Error executing Cloudflare IUAM Javascript. %s' % BUG_REPORT)
raise
pass
ChallengeInterpreter()