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| import base64 | |
| import subprocess | |
| import sys | |
| from . import JavaScriptInterpreter | |
| from .encapsulated import template | |
| # ------------------------------------------------------------------------------- # | |
| class ChallengeInterpreter(JavaScriptInterpreter): | |
| # ------------------------------------------------------------------------------- # | |
| def __init__(self): | |
| super(ChallengeInterpreter, self).__init__('nodejs') | |
| # ------------------------------------------------------------------------------- # | |
| def eval(self, body, domain): | |
| 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(template(body, domain).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`).\n\n' | |
| '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.\n\n' | |
| '(Please read the cloudscraper README\'s Dependencies section: ' | |
| 'https://github.com/VeNoMouS/cloudscraper#dependencies.)' | |
| ) | |
| raise | |
| except Exception: | |
| sys.tracebacklimit = 0 | |
| raise RuntimeError('Error executing Cloudflare IUAM Javascript in nodejs') | |
| # ------------------------------------------------------------------------------- # | |
| ChallengeInterpreter() | |