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bazarr/libs/cloudscraper/__init__.py

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# ------------------------------------------------------------------------------- #
import logging
import re
import requests
import sys
import ssl
from collections import OrderedDict
from copy import deepcopy
from requests.adapters import HTTPAdapter
from requests.sessions import Session
from requests_toolbelt.utils import dump
from time import sleep
# ------------------------------------------------------------------------------- #
try:
import brotli
except ImportError:
pass
try:
import copyreg
except ImportError:
import copy_reg as copyreg
try:
from HTMLParser import HTMLParser
except ImportError:
if sys.version_info >= (3, 4):
import html
else:
from html.parser import HTMLParser
try:
from urlparse import urlparse, urljoin
except ImportError:
from urllib.parse import urlparse, urljoin
# ------------------------------------------------------------------------------- #
from .exceptions import (
CloudflareLoopProtection,
CloudflareCode1020,
CloudflareIUAMError,
CloudflareSolveError,
CloudflareChallengeError,
CloudflareCaptchaError,
CloudflareCaptchaProvider
)
from .interpreters import JavaScriptInterpreter
from .captcha import Captcha
from .user_agent import User_Agent
# ------------------------------------------------------------------------------- #
__version__ = '1.2.58'
# ------------------------------------------------------------------------------- #
class CipherSuiteAdapter(HTTPAdapter):
__attrs__ = [
'ssl_context',
'max_retries',
'config',
'_pool_connections',
'_pool_maxsize',
'_pool_block',
'source_address'
]
def __init__(self, *args, **kwargs):
self.ssl_context = kwargs.pop('ssl_context', None)
self.cipherSuite = kwargs.pop('cipherSuite', None)
self.source_address = kwargs.pop('source_address', None)
if self.source_address:
if isinstance(self.source_address, str):
self.source_address = (self.source_address, 0)
if not isinstance(self.source_address, tuple):
raise TypeError(
"source_address must be IP address string or (ip, port) tuple"
)
if not self.ssl_context:
self.ssl_context = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
self.ssl_context.set_ciphers(self.cipherSuite)
self.ssl_context.set_ecdh_curve('prime256v1')
self.ssl_context.options |= (ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1)
super(CipherSuiteAdapter, self).__init__(**kwargs)
# ------------------------------------------------------------------------------- #
def init_poolmanager(self, *args, **kwargs):
kwargs['ssl_context'] = self.ssl_context
kwargs['source_address'] = self.source_address
return super(CipherSuiteAdapter, self).init_poolmanager(*args, **kwargs)
# ------------------------------------------------------------------------------- #
def proxy_manager_for(self, *args, **kwargs):
kwargs['ssl_context'] = self.ssl_context
kwargs['source_address'] = self.source_address
return super(CipherSuiteAdapter, self).proxy_manager_for(*args, **kwargs)
# ------------------------------------------------------------------------------- #
class CloudScraper(Session):
def __init__(self, *args, **kwargs):
self.debug = kwargs.pop('debug', False)
self.delay = kwargs.pop('delay', None)
self.cipherSuite = kwargs.pop('cipherSuite', None)
self.ssl_context = kwargs.pop('ssl_context', None)
self.interpreter = kwargs.pop('interpreter', 'native')
self.captcha = kwargs.pop('captcha', {})
self.requestPreHook = kwargs.pop('requestPreHook', None)
self.requestPostHook = kwargs.pop('requestPostHook', None)
self.source_address = kwargs.pop('source_address', None)
self.doubleDown = kwargs.pop('doubleDown', True)
self.allow_brotli = kwargs.pop(
'allow_brotli',
True if 'brotli' in sys.modules.keys() else False
)
self.user_agent = User_Agent(
allow_brotli=self.allow_brotli,
browser=kwargs.pop('browser', None)
)
self._solveDepthCnt = 0
self.solveDepth = kwargs.pop('solveDepth', 3)
super(CloudScraper, self).__init__(*args, **kwargs)
# pylint: disable=E0203
if 'requests' in self.headers['User-Agent']:
# ------------------------------------------------------------------------------- #
# Set a random User-Agent if no custom User-Agent has been set
# ------------------------------------------------------------------------------- #
self.headers = self.user_agent.headers
if not self.cipherSuite:
self.cipherSuite = self.user_agent.cipherSuite
if isinstance(self.cipherSuite, list):
self.cipherSuite = ':'.join(self.cipherSuite)
self.mount(
'https://',
CipherSuiteAdapter(
cipherSuite=self.cipherSuite,
ssl_context=self.ssl_context,
source_address=self.source_address
)
)
# purely to allow us to pickle dump
copyreg.pickle(ssl.SSLContext, lambda obj: (obj.__class__, (obj.protocol,)))
# ------------------------------------------------------------------------------- #
# Allow us to pickle our session back with all variables
# ------------------------------------------------------------------------------- #
def __getstate__(self):
return self.__dict__
# ------------------------------------------------------------------------------- #
# Allow replacing actual web request call via subclassing
# ------------------------------------------------------------------------------- #
def perform_request(self, method, url, *args, **kwargs):
return super(CloudScraper, self).request(method, url, *args, **kwargs)
# ------------------------------------------------------------------------------- #
# Raise an Exception with no stacktrace and reset depth counter.
# ------------------------------------------------------------------------------- #
def simpleException(self, exception, msg):
self._solveDepthCnt = 0
sys.tracebacklimit = 0
raise exception(msg)
# ------------------------------------------------------------------------------- #
# debug the request via the response
# ------------------------------------------------------------------------------- #
@staticmethod
def debugRequest(req):
try:
print(dump.dump_all(req).decode('utf-8', errors='backslashreplace'))
except ValueError as e:
print(f"Debug Error: {getattr(e, 'message', e)}")
# ------------------------------------------------------------------------------- #
# Unescape / decode html entities
# ------------------------------------------------------------------------------- #
@staticmethod
def unescape(html_text):
if sys.version_info >= (3, 0):
if sys.version_info >= (3, 4):
return html.unescape(html_text)
return HTMLParser().unescape(html_text)
return HTMLParser().unescape(html_text)
# ------------------------------------------------------------------------------- #
# Decode Brotli on older versions of urllib3 manually
# ------------------------------------------------------------------------------- #
def decodeBrotli(self, resp):
if requests.packages.urllib3.__version__ < '1.25.1' and resp.headers.get('Content-Encoding') == 'br':
if self.allow_brotli and resp._content:
resp._content = brotli.decompress(resp.content)
else:
logging.warning(
f'You\'re running urllib3 {requests.packages.urllib3.__version__}, Brotli content detected, '
'Which requires manual decompression, '
'But option allow_brotli is set to False, '
'We will not continue to decompress.'
)
return resp
# ------------------------------------------------------------------------------- #
# Our hijacker request function
# ------------------------------------------------------------------------------- #
def request(self, method, url, *args, **kwargs):
# pylint: disable=E0203
if kwargs.get('proxies') and kwargs.get('proxies') != self.proxies:
self.proxies = kwargs.get('proxies')
# ------------------------------------------------------------------------------- #
# Pre-Hook the request via user defined function.
# ------------------------------------------------------------------------------- #
if self.requestPreHook:
(method, url, args, kwargs) = self.requestPreHook(
self,
method,
url,
*args,
**kwargs
)
# ------------------------------------------------------------------------------- #
# Make the request via requests.
# ------------------------------------------------------------------------------- #
response = self.decodeBrotli(
self.perform_request(method, url, *args, **kwargs)
)
# ------------------------------------------------------------------------------- #
# Debug the request via the Response object.
# ------------------------------------------------------------------------------- #
if self.debug:
self.debugRequest(response)
# ------------------------------------------------------------------------------- #
# Post-Hook the request aka Post-Hook the response via user defined function.
# ------------------------------------------------------------------------------- #
if self.requestPostHook:
response = self.requestPostHook(self, response)
if self.debug:
self.debugRequest(response)
# Check if Cloudflare anti-bot is on
if self.is_Challenge_Request(response):
# ------------------------------------------------------------------------------- #
# Try to solve the challenge and send it back
# ------------------------------------------------------------------------------- #
if self._solveDepthCnt >= self.solveDepth:
_ = self._solveDepthCnt
self.simpleException(
CloudflareLoopProtection,
f"!!Loop Protection!! We have tried to solve {_} time(s) in a row."
)
self._solveDepthCnt += 1
response = self.Challenge_Response(response, **kwargs)
else:
if not response.is_redirect and response.status_code not in [429, 503]:
self._solveDepthCnt = 0
return response
# ------------------------------------------------------------------------------- #
# check if the response contains a valid Cloudflare Bot Fight Mode challenge
# ------------------------------------------------------------------------------- #
@staticmethod
def is_BFM_Challenge(resp):
try:
return (
resp.headers.get('Server', '').startswith('cloudflare')
and re.search(
r"\/cdn-cgi\/bm\/cv\/\d+\/api\.js.*?"
r"window\['__CF\$cv\$params'\]\s*=\s*{",
resp.text,
re.M | re.S
)
)
except AttributeError:
pass
return False
# ------------------------------------------------------------------------------- #
# check if the response contains a valid Cloudflare challenge
# ------------------------------------------------------------------------------- #
@staticmethod
def is_IUAM_Challenge(resp):
try:
return (
resp.headers.get('Server', '').startswith('cloudflare')
and resp.status_code in [429, 503]
and re.search(
r'<form .*?="challenge-form" action="/.*?__cf_chl_jschl_tk__=\S+"',
resp.text,
re.M | re.S
)
)
except AttributeError:
pass
return False
# ------------------------------------------------------------------------------- #
# check if the response contains new Cloudflare challenge
# ------------------------------------------------------------------------------- #
@staticmethod
def is_New_IUAM_Challenge(resp):
try:
return (
resp.headers.get('Server', '').startswith('cloudflare')
and resp.status_code in [429, 503]
and re.search(
r'cpo.src\s*=\s*"/cdn-cgi/challenge-platform/\S+orchestrate/jsch/v1',
resp.text,
re.M | re.S
)
and re.search(r'window._cf_chl_enter\s*[\(=]', resp.text, re.M | re.S)
)
except AttributeError:
pass
return False
# ------------------------------------------------------------------------------- #
# check if the response contains a v2 hCaptcha Cloudflare challenge
# ------------------------------------------------------------------------------- #
@staticmethod
def is_New_Captcha_Challenge(resp):
try:
return (
CloudScraper.is_Captcha_Challenge(resp)
and re.search(
r'cpo.src\s*=\s*"/cdn-cgi/challenge-platform/\S+orchestrate/captcha/v1',
resp.text,
re.M | re.S
)
and re.search(r'\s*id="trk_captcha_js"', resp.text, re.M | re.S)
)
except AttributeError:
pass
return False
# ------------------------------------------------------------------------------- #
# check if the response contains a Cloudflare hCaptcha challenge
# ------------------------------------------------------------------------------- #
@staticmethod
def is_Captcha_Challenge(resp):
try:
return (
resp.headers.get('Server', '').startswith('cloudflare')
and resp.status_code == 403
and re.search(
r'action="/\S+__cf_chl_captcha_tk__=\S+',
resp.text,
re.M | re.DOTALL
)
)
except AttributeError:
pass
return False
# ------------------------------------------------------------------------------- #
# check if the response contains Firewall 1020 Error
# ------------------------------------------------------------------------------- #
@staticmethod
def is_Firewall_Blocked(resp):
try:
return (
resp.headers.get('Server', '').startswith('cloudflare')
and resp.status_code == 403
and re.search(
r'<span class="cf-error-code">1020</span>',
resp.text,
re.M | re.DOTALL
)
)
except AttributeError:
pass
return False
# ------------------------------------------------------------------------------- #
# Wrapper for is_Captcha_Challenge, is_IUAM_Challenge, is_Firewall_Blocked
# ------------------------------------------------------------------------------- #
def is_Challenge_Request(self, resp):
if self.is_Firewall_Blocked(resp):
self.simpleException(
CloudflareCode1020,
'Cloudflare has blocked this request (Code 1020 Detected).'
)
if self.is_New_Captcha_Challenge(resp):
self.simpleException(
CloudflareChallengeError,
'Detected a Cloudflare version 2 Captcha challenge, This feature is not available in the opensource (free) version.'
)
if self.is_New_IUAM_Challenge(resp):
self.simpleException(
CloudflareChallengeError,
'Detected a Cloudflare version 2 challenge, This feature is not available in the opensource (free) version.'
)
if self.is_Captcha_Challenge(resp) or self.is_IUAM_Challenge(resp):
if self.debug:
print('Detected a Cloudflare version 1 challenge.')
return True
return False
# ------------------------------------------------------------------------------- #
# Try to solve cloudflare javascript challenge.
# ------------------------------------------------------------------------------- #
def IUAM_Challenge_Response(self, body, url, interpreter):
try:
formPayload = re.search(
r'<form (?P<form>.*?="challenge-form" '
r'action="(?P<challengeUUID>.*?'
r'__cf_chl_jschl_tk__=\S+)"(.*?)</form>)',
body,
re.M | re.DOTALL
).groupdict()
if not all(key in formPayload for key in ['form', 'challengeUUID']):
self.simpleException(
CloudflareIUAMError,
"Cloudflare IUAM detected, unfortunately we can't extract the parameters correctly."
)
payload = OrderedDict()
for challengeParam in re.findall(r'^\s*<input\s(.*?)/>', formPayload['form'], re.M | re.S):
inputPayload = dict(re.findall(r'(\S+)="(\S+)"', challengeParam))
if inputPayload.get('name') in ['r', 'jschl_vc', 'pass']:
payload.update({inputPayload['name']: inputPayload['value']})
except AttributeError:
self.simpleException(
CloudflareIUAMError,
"Cloudflare IUAM detected, unfortunately we can't extract the parameters correctly."
)
hostParsed = urlparse(url)
try:
payload['jschl_answer'] = JavaScriptInterpreter.dynamicImport(
interpreter
).solveChallenge(body, hostParsed.netloc)
except Exception as e:
self.simpleException(
CloudflareIUAMError,
f"Unable to parse Cloudflare anti-bots page: {getattr(e, 'message', e)}"
)
return {
'url': f"{hostParsed.scheme}://{hostParsed.netloc}{self.unescape(formPayload['challengeUUID'])}",
'data': payload
}
# ------------------------------------------------------------------------------- #
# Try to solve the Captcha challenge via 3rd party.
# ------------------------------------------------------------------------------- #
def captcha_Challenge_Response(self, provider, provider_params, body, url):
try:
formPayload = re.search(
r'<form (?P<form>.*?="challenge-form" '
r'action="(?P<challengeUUID>.*?__cf_chl_captcha_tk__=\S+)"(.*?)</form>)',
body,
re.M | re.DOTALL
).groupdict()
if not all(key in formPayload for key in ['form', 'challengeUUID']):
self.simpleException(
CloudflareCaptchaError,
"Cloudflare Captcha detected, unfortunately we can't extract the parameters correctly."
)
payload = OrderedDict(
re.findall(
r'(name="r"\svalue|data-ray|data-sitekey|name="cf_captcha_kind"\svalue)="(.*?)"',
formPayload['form']
)
)
captchaType = 'reCaptcha' if payload['name="cf_captcha_kind" value'] == 're' else 'hCaptcha'
except (AttributeError, KeyError):
self.simpleException(
CloudflareCaptchaError,
"Cloudflare Captcha detected, unfortunately we can't extract the parameters correctly."
)
# ------------------------------------------------------------------------------- #
# Pass proxy parameter to provider to solve captcha.
# ------------------------------------------------------------------------------- #
if self.proxies and self.proxies != self.captcha.get('proxy'):
self.captcha['proxy'] = self.proxies
# ------------------------------------------------------------------------------- #
# Pass User-Agent if provider supports it to solve captcha.
# ------------------------------------------------------------------------------- #
self.captcha['User-Agent'] = self.headers['User-Agent']
# ------------------------------------------------------------------------------- #
# Submit job to provider to request captcha solve.
# ------------------------------------------------------------------------------- #
captchaResponse = Captcha.dynamicImport(
provider.lower()
).solveCaptcha(
captchaType,
url,
payload['data-sitekey'],
provider_params
)
# ------------------------------------------------------------------------------- #
# Parse and handle the response of solved captcha.
# ------------------------------------------------------------------------------- #
dataPayload = OrderedDict([
('r', payload.get('name="r" value', '')),
('cf_captcha_kind', payload['name="cf_captcha_kind" value']),
('id', payload.get('data-ray')),
('g-recaptcha-response', captchaResponse)
])
if captchaType == 'hCaptcha':
dataPayload.update({'h-captcha-response': captchaResponse})
hostParsed = urlparse(url)
return {
'url': f"{hostParsed.scheme}://{hostParsed.netloc}{self.unescape(formPayload['challengeUUID'])}",
'data': dataPayload
}
# ------------------------------------------------------------------------------- #
# Attempt to handle and send the challenge response back to cloudflare
# ------------------------------------------------------------------------------- #
def Challenge_Response(self, resp, **kwargs):
if self.is_Captcha_Challenge(resp):
# ------------------------------------------------------------------------------- #
# double down on the request as some websites are only checking
# if cfuid is populated before issuing Captcha.
# ------------------------------------------------------------------------------- #
if self.doubleDown:
resp = self.decodeBrotli(
self.perform_request(resp.request.method, resp.url, **kwargs)
)
if not self.is_Captcha_Challenge(resp):
return resp
# ------------------------------------------------------------------------------- #
# if no captcha provider raise a runtime error.
# ------------------------------------------------------------------------------- #
if not self.captcha or not isinstance(self.captcha, dict) or not self.captcha.get('provider'):
self.simpleException(
CloudflareCaptchaProvider,
"Cloudflare Captcha detected, unfortunately you haven't loaded an anti Captcha provider "
"correctly via the 'captcha' parameter."
)
# ------------------------------------------------------------------------------- #
# if provider is return_response, return the response without doing anything.
# ------------------------------------------------------------------------------- #
if self.captcha.get('provider') == 'return_response':
return resp
# ------------------------------------------------------------------------------- #
# Submit request to parser wrapper to solve captcha
# ------------------------------------------------------------------------------- #
submit_url = self.captcha_Challenge_Response(
self.captcha.get('provider'),
self.captcha,
resp.text,
resp.url
)
else:
# ------------------------------------------------------------------------------- #
# Cloudflare requires a delay before solving the challenge
# ------------------------------------------------------------------------------- #
if not self.delay:
try:
delay = float(
re.search(
r'submit\(\);\r?\n\s*},\s*([0-9]+)',
resp.text
).group(1)
) / float(1000)
if isinstance(delay, (int, float)):
self.delay = delay
except (AttributeError, ValueError):
self.simpleException(
CloudflareIUAMError,
"Cloudflare IUAM possibility malformed, issue extracing delay value."
)
sleep(self.delay)
# ------------------------------------------------------------------------------- #
submit_url = self.IUAM_Challenge_Response(
resp.text,
resp.url,
self.interpreter
)
# ------------------------------------------------------------------------------- #
# Send the Challenge Response back to Cloudflare
# ------------------------------------------------------------------------------- #
if submit_url:
def updateAttr(obj, name, newValue):
try:
obj[name].update(newValue)
return obj[name]
except (AttributeError, KeyError):
obj[name] = {}
obj[name].update(newValue)
return obj[name]
cloudflare_kwargs = deepcopy(kwargs)
cloudflare_kwargs['allow_redirects'] = False
cloudflare_kwargs['data'] = updateAttr(
cloudflare_kwargs,
'data',
submit_url['data']
)
urlParsed = urlparse(resp.url)
cloudflare_kwargs['headers'] = updateAttr(
cloudflare_kwargs,
'headers',
{
'Origin': f'{urlParsed.scheme}://{urlParsed.netloc}',
'Referer': resp.url
}
)
challengeSubmitResponse = self.request(
'POST',
submit_url['url'],
**cloudflare_kwargs
)
if challengeSubmitResponse.status_code == 400:
self.simpleException(
CloudflareSolveError,
'Invalid challenge answer detected, Cloudflare broken?'
)
# ------------------------------------------------------------------------------- #
# Return response if Cloudflare is doing content pass through instead of 3xx
# else request with redirect URL also handle protocol scheme change http -> https
# ------------------------------------------------------------------------------- #
if not challengeSubmitResponse.is_redirect:
return challengeSubmitResponse
else:
cloudflare_kwargs = deepcopy(kwargs)
cloudflare_kwargs['headers'] = updateAttr(
cloudflare_kwargs,
'headers',
{'Referer': challengeSubmitResponse.url}
)
if not urlparse(challengeSubmitResponse.headers['Location']).netloc:
redirect_location = urljoin(
challengeSubmitResponse.url,
challengeSubmitResponse.headers['Location']
)
else:
redirect_location = challengeSubmitResponse.headers['Location']
return self.request(
resp.request.method,
redirect_location,
**cloudflare_kwargs
)
# ------------------------------------------------------------------------------- #
# We shouldn't be here...
# Re-request the original query and/or process again....
# ------------------------------------------------------------------------------- #
return self.request(resp.request.method, resp.url, **kwargs)
# ------------------------------------------------------------------------------- #
@classmethod
def create_scraper(cls, sess=None, **kwargs):
"""
Convenience function for creating a ready-to-go CloudScraper object.
"""
scraper = cls(**kwargs)
if sess:
for attr in ['auth', 'cert', 'cookies', 'headers', 'hooks', 'params', 'proxies', 'data']:
val = getattr(sess, attr, None)
if val:
setattr(scraper, attr, val)
return scraper
# ------------------------------------------------------------------------------- #
# Functions for integrating cloudscraper with other applications and scripts
# ------------------------------------------------------------------------------- #
@classmethod
def get_tokens(cls, url, **kwargs):
scraper = cls.create_scraper(
**{
field: kwargs.pop(field, None) for field in [
'allow_brotli',
'browser',
'debug',
'delay',
'doubleDown',
'captcha',
'interpreter',
'source_address'
'requestPreHook',
'requestPostHook'
] if field in kwargs
}
)
try:
resp = scraper.get(url, **kwargs)
resp.raise_for_status()
except Exception:
logging.error(f'"{url}" returned an error. Could not collect tokens.')
raise
domain = urlparse(resp.url).netloc
# noinspection PyUnusedLocal
cookie_domain = None
for d in scraper.cookies.list_domains():
if d.startswith('.') and d in (f'.{domain}'):
cookie_domain = d
break
else:
cls.simpleException(
CloudflareIUAMError,
"Unable to find Cloudflare cookies. Does the site actually "
"have Cloudflare IUAM (I'm Under Attack Mode) enabled?"
)
return (
{
'__cfduid': scraper.cookies.get('__cfduid', '', domain=cookie_domain),
'cf_clearance': scraper.cookies.get('cf_clearance', '', domain=cookie_domain)
},
scraper.headers['User-Agent']
)
# ------------------------------------------------------------------------------- #
@classmethod
def get_cookie_string(cls, url, **kwargs):
"""
Convenience function for building a Cookie HTTP header value.
"""
tokens, user_agent = cls.get_tokens(url, **kwargs)
return '; '.join('='.join(pair) for pair in tokens.items()), user_agent
# ------------------------------------------------------------------------------- #
if ssl.OPENSSL_VERSION_INFO < (1, 1, 1):
print(
f"DEPRECATION: The OpenSSL being used by this python install ({ssl.OPENSSL_VERSION}) does not meet the minimum supported "
"version (>= OpenSSL 1.1.1) in order to support TLS 1.3 required by Cloudflare, "
"You may encounter an unexpected Captcha or cloudflare 1020 blocks."
)
# ------------------------------------------------------------------------------- #
create_scraper = CloudScraper.create_scraper
get_tokens = CloudScraper.get_tokens
get_cookie_string = CloudScraper.get_cookie_string
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