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# SPDX-License-Identifier: AGPL-3.0-or-later
"""
Raise exception for an HTTP response is an error.
"""
from searx.exceptions import (SearxEngineCaptchaException, SearxEngineTooManyRequestsException,
SearxEngineAccessDeniedException)
def is_cloudflare_challenge(resp):
if resp.status_code in [429, 503]:
if ('__cf_chl_jschl_tk__=' in resp.text)\
or ('/cdn-cgi/challenge-platform/' in resp.text
and 'orchestrate/jsch/v1' in resp.text
and 'window._cf_chl_enter(' in resp.text):
return True
if resp.status_code == 403 and '__cf_chl_captcha_tk__=' in resp.text:
return True
return False
def is_cloudflare_firewall(resp):
return resp.status_code == 403 and '<span class="cf-error-code">1020</span>' in resp.text
def raise_for_cloudflare_captcha(resp):
if resp.headers.get('Server', '').startswith('cloudflare'):
if is_cloudflare_challenge(resp):
# https://support.cloudflare.com/hc/en-us/articles/200170136-Understanding-Cloudflare-Challenge-Passage-Captcha-
# suspend for 2 weeks
raise SearxEngineCaptchaException(message='Cloudflare CAPTCHA', suspended_time=3600 * 24 * 15)
if is_cloudflare_firewall(resp):
raise SearxEngineAccessDeniedException(message='Cloudflare Firewall', suspended_time=3600 * 24)
def raise_for_recaptcha(resp):
if resp.status_code == 503 \
and '"https://www.google.com/recaptcha/' in resp.text:
raise SearxEngineCaptchaException(message='ReCAPTCHA', suspended_time=3600 * 24 * 7)
def raise_for_captcha(resp):
raise_for_cloudflare_captcha(resp)
raise_for_recaptcha(resp)
def raise_for_httperror(resp):
"""Raise exception for an HTTP response is an error.
Args:
resp (requests.Response): Response to check
Raises:
requests.HTTPError: raise by resp.raise_for_status()
searx.exceptions.SearxEngineAccessDeniedException: raise when the HTTP status code is 402 or 403.
searx.exceptions.SearxEngineTooManyRequestsException: raise when the HTTP status code is 429.
searx.exceptions.SearxEngineCaptchaException: raise when if CATPCHA challenge is detected.
"""
if resp.status_code and resp.status_code >= 400:
raise_for_captcha(resp)
if resp.status_code in (402, 403):
raise SearxEngineAccessDeniedException(message='HTTP error ' + str(resp.status_code),
suspended_time=3600 * 24)
if resp.status_code == 429:
raise SearxEngineTooManyRequestsException()
resp.raise_for_status()
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