# SPDX-License-Identifier: AGPL-3.0-or-later import gc import typing import types import functools import itertools from time import time from timeit import default_timer from urllib.parse import urlparse import re from langdetect import detect_langs from langdetect.lang_detect_exception import LangDetectException import httpx from searx import network, logger from searx.utils import gen_useragent from searx.results import ResultContainer from searx.search.models import SearchQuery, EngineRef from searx.search.processors import EngineProcessor from searx.metrics import counter_inc logger = logger.getChild('searx.search.checker') HTML_TAGS = [ # fmt: off 'embed', 'iframe', 'object', 'param', 'picture', 'source', 'svg', 'math', 'canvas', 'noscript', 'script', 'del', 'ins', 'area', 'audio', 'img', 'map', 'track', 'video', 'a', 'abbr', 'b', 'bdi', 'bdo', 'br', 'cite', 'code', 'data', 'dfn', 'em', 'i', 'kdb', 'mark', 'q', 'rb', 'rp', 'rt', 'rtc', 'ruby', 's', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'time', 'u', 'var', 'wbr', 'style', 'blockquote', 'dd', 'div', 'dl', 'dt', 'figcaption', 'figure', 'hr', 'li', 'ol', 'p', 'pre', 'ul', 'button', 'datalist', 'fieldset', 'form', 'input', 'label', 'legend', 'meter', 'optgroup', 'option', 'output', 'progress', 'select', 'textarea', 'applet', 'frame', 'frameset' # fmt: on ] def get_check_no_html(): rep = ['<' + tag + '[^\>]*>' for tag in HTML_TAGS] rep += ['' for tag in HTML_TAGS] pattern = re.compile('|'.join(rep)) def f(text): return pattern.search(text.lower()) is None return f _check_no_html = get_check_no_html() def _is_url(url): try: result = urlparse(url) except ValueError: return False if result.scheme not in ('http', 'https'): return False return True @functools.lru_cache(maxsize=8192) def _download_and_check_if_image(image_url: str) -> bool: """Download an URL and check if the Content-Type starts with "image/" This function should not be called directly: use _is_url_image otherwise the cache of functools.lru_cache contains data: URL which might be huge. """ retry = 2 while retry > 0: a = time() try: # use "image_proxy" (avoid HTTP/2) network.set_context_network_name('image_proxy') r, stream = network.stream( 'GET', image_url, timeout=10.0, allow_redirects=True, headers={ 'User-Agent': gen_useragent(), 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8', 'Accept-Language': 'en-US;q=0.5,en;q=0.3', 'Accept-Encoding': 'gzip, deflate, br', 'DNT': '1', 'Connection': 'keep-alive', 'Upgrade-Insecure-Requests': '1', 'Sec-GPC': '1', 'Cache-Control': 'max-age=0', }, ) r.close() if r.status_code == 200: is_image = r.headers.get('content-type', '').startswith('image/') else: is_image = False del r del stream return is_image except httpx.TimeoutException: logger.error('Timeout for %s: %i', image_url, int(time() - a)) retry -= 1 except httpx.HTTPError: logger.exception('Exception for %s', image_url) return False return False def _is_url_image(image_url) -> bool: """Normalize image_url""" if not isinstance(image_url, str): return False if image_url.startswith('//'): image_url = 'https:' + image_url if image_url.startswith('data:'): return image_url.startswith('data:image/') if not _is_url(image_url): return False return _download_and_check_if_image(image_url) def _search_query_to_dict(search_query: SearchQuery) -> typing.Dict[str, typing.Any]: return { 'query': search_query.query, 'lang': search_query.lang, 'pageno': search_query.pageno, 'safesearch': search_query.safesearch, 'time_range': search_query.time_range, } def _search_query_diff( sq1: SearchQuery, sq2: SearchQuery ) -> typing.Tuple[typing.Dict[str, typing.Any], typing.Dict[str, typing.Any]]: param1 = _search_query_to_dict(sq1) param2 = _search_query_to_dict(sq2) common = {} diff = {} for k, value1 in param1.items(): value2 = param2[k] if value1 == value2: common[k] = value1 else: diff[k] = (value1, value2) return (common, diff) class TestResults: __slots__ = 'errors', 'logs', 'languages' def __init__(self): self.errors: typing.Dict[str, typing.List[str]] = {} self.logs: typing.Dict[str, typing.List[typing.Any]] = {} self.languages: typing.Set[str] = set() def add_error(self, test, message, *args): # message to self.errors errors_for_test = self.errors.setdefault(test, []) if message not in errors_for_test: errors_for_test.append(message) # (message, *args) to self.logs logs_for_test = self.logs.setdefault(test, []) if (message, *args) not in logs_for_test: logs_for_test.append((message, *args)) def add_language(self, language): self.languages.add(language) @property def successful(self): return len(self.errors) == 0 def __iter__(self): for test_name, errors in self.errors.items(): for error in sorted(errors): yield (test_name, error) class ResultContainerTests: __slots__ = 'test_name', 'search_query', 'result_container', 'languages', 'stop_test', 'test_results' def __init__( self, test_results: TestResults, test_name: str, search_query: SearchQuery, result_container: ResultContainer ): self.test_name = test_name self.search_query = search_query self.result_container = result_container self.languages: typing.Set[str] = set() self.test_results = test_results self.stop_test = False @property def result_urls(self): results = self.result_container.get_ordered_results() return [result['url'] for result in results if 'url' in result] def _record_error(self, message: str, *args) -> None: sq = _search_query_to_dict(self.search_query) sqstr = ' '.join(['{}={!r}'.format(k, v) for k, v in sq.items()]) self.test_results.add_error(self.test_name, message, *args, '(' + sqstr + ')') def _add_language(self, text: str) -> typing.Optional[str]: try: r = detect_langs(str(text)) # pylint: disable=E1101 except LangDetectException: return None if len(r) > 0 and r[0].prob > 0.95: self.languages.add(r[0].lang) self.test_results.add_language(r[0].lang) return None def _check_result(self, result): if not _check_no_html(result.get('title', '')): self._record_error('HTML in title', repr(result.get('title', ''))) if not _check_no_html(result.get('content', '')): self._record_error('HTML in content', repr(result.get('content', ''))) if result.get('url') is None: self._record_error('url is None') self._add_language(result.get('title', '')) self._add_language(result.get('content', '')) template = result.get('template', 'default.html') if template == 'default.html': return if template == 'code.html': return if template == 'torrent.html': return if template == 'map.html': return if template == 'images.html': thumbnail_src = result.get('thumbnail_src') if thumbnail_src is not None: if not _is_url_image(thumbnail_src): self._record_error('thumbnail_src URL is invalid', thumbnail_src) elif not _is_url_image(result.get('img_src')): self._record_error('img_src URL is invalid', result.get('img_src')) if template == 'videos.html' and not _is_url_image(result.get('thumbnail')): self._record_error('thumbnail URL is invalid', result.get('img_src')) def _check_results(self, results: list): for result in results: self._check_result(result) def _check_answers(self, answers): for answer in answers: if not _check_no_html(answer): self._record_error('HTML in answer', answer) def _check_infoboxes(self, infoboxes): for infobox in infoboxes: if not _check_no_html(infobox.get('content', '')): self._record_error('HTML in infobox content', infobox.get('content', '')) self._add_language(infobox.get('content', '')) for attribute in infobox.get('attributes', {}): if not _check_no_html(attribute.get('value', '')): self._record_error('HTML in infobox attribute value', attribute.get('value', '')) def check_basic(self): if len(self.result_container.unresponsive_engines) > 0: for message in self.result_container.unresponsive_engines: self._record_error(message[1] + ' ' + (message[2] or '')) self.stop_test = True return results = self.result_container.get_ordered_results() if len(results) > 0: self._check_results(results) if len(self.result_container.answers) > 0: self._check_answers(self.result_container.answers) if len(self.result_container.infoboxes) > 0: self._check_infoboxes(self.result_container.infoboxes) def has_infobox(self): """Check the ResultContainer has at least one infobox""" if len(self.result_container.infoboxes) == 0: self._record_error('No infobox') def has_answer(self): """Check the ResultContainer has at least one answer""" if len(self.result_container.answers) == 0: self._record_error('No answer') def has_language(self, lang): """Check at least one title or content of the results is written in the `lang`. Detected using pycld3, may be not accurate""" if lang not in self.languages: self._record_error(lang + ' not found') def not_empty(self): """Check the ResultContainer has at least one answer or infobox or result""" result_types = set() results = self.result_container.get_ordered_results() if len(results) > 0: result_types.add('results') if len(self.result_container.answers) > 0: result_types.add('answers') if len(self.result_container.infoboxes) > 0: result_types.add('infoboxes') if len(result_types) == 0: self._record_error('No result') def one_title_contains(self, title: str): """Check one of the title contains `title` (case insensitive comparison)""" title = title.lower() for result in self.result_container.get_ordered_results(): if title in result['title'].lower(): return self._record_error(('{!r} not found in the title'.format(title))) class CheckerTests: __slots__ = 'test_results', 'test_name', 'result_container_tests_list' def __init__( self, test_results: TestResults, test_name: str, result_container_tests_list: typing.List[ResultContainerTests] ): self.test_results = test_results self.test_name = test_name self.result_container_tests_list = result_container_tests_list def unique_results(self): """Check the results of each ResultContainer is unique""" urls_list = [rct.result_urls for rct in self.result_container_tests_list] if len(urls_list[0]) > 0: # results on the first page for i, urls_i in enumerate(urls_list): for j, urls_j in enumerate(urls_list): if i < j and urls_i == urls_j: common, diff = _search_query_diff( self.result_container_tests_list[i].search_query, self.result_container_tests_list[j].search_query, ) common_str = ' '.join(['{}={!r}'.format(k, v) for k, v in common.items()]) diff1_str = ', '.join(['{}={!r}'.format(k, v1) for (k, (v1, v2)) in diff.items()]) diff2_str = ', '.join(['{}={!r}'.format(k, v2) for (k, (v1, v2)) in diff.items()]) self.test_results.add_error( self.test_name, 'results are identitical for {} and {} ({})'.format(diff1_str, diff2_str, common_str), ) class Checker: __slots__ = 'processor', 'tests', 'test_results' def __init__(self, processor: EngineProcessor): self.processor = processor self.tests = self.processor.get_tests() self.test_results = TestResults() @property def engineref_list(self): engine_name = self.processor.engine_name engine_category = self.processor.engine.categories[0] return [EngineRef(engine_name, engine_category)] @staticmethod def search_query_matrix_iterator(engineref_list, matrix): p = [] for name, values in matrix.items(): if isinstance(values, (tuple, list)): l = [(name, value) for value in values] else: l = [(name, values)] p.append(l) for kwargs in itertools.product(*p): kwargs = {k: v for k, v in kwargs} query = kwargs['query'] params = dict(kwargs) del params['query'] yield SearchQuery(query, engineref_list, **params) def call_test(self, obj, test_description): if isinstance(test_description, (tuple, list)): method, args = test_description[0], test_description[1:] else: method = test_description args = () if isinstance(method, str) and hasattr(obj, method): getattr(obj, method)(*args) elif isinstance(method, types.FunctionType): method(*args) else: self.test_results.add_error( obj.test_name, 'method {!r} ({}) not found for {}'.format(method, method.__class__.__name__, obj.__class__.__name__), ) def call_tests(self, obj, test_descriptions): for test_description in test_descriptions: self.call_test(obj, test_description) def search(self, search_query: SearchQuery) -> ResultContainer: result_container = ResultContainer() engineref_category = search_query.engineref_list[0].category params = self.processor.get_params(search_query, engineref_category) if params is not None: counter_inc('engine', search_query.engineref_list[0].name, 'search', 'count', 'sent') self.processor.search(search_query.query, params, result_container, default_timer(), 5) return result_container def get_result_container_tests(self, test_name: str, search_query: SearchQuery) -> ResultContainerTests: result_container = self.search(search_query) result_container_check = ResultContainerTests(self.test_results, test_name, search_query, result_container) result_container_check.check_basic() return result_container_check def run_test(self, test_name): test_parameters = self.tests[test_name] search_query_list = list(Checker.search_query_matrix_iterator(self.engineref_list, test_parameters['matrix'])) rct_list = [self.get_result_container_tests(test_name, search_query) for search_query in search_query_list] stop_test = False if 'result_container' in test_parameters: for rct in rct_list: stop_test = stop_test or rct.stop_test if not rct.stop_test: self.call_tests(rct, test_parameters['result_container']) if not stop_test: if 'test' in test_parameters: checker_tests = CheckerTests(self.test_results, test_name, rct_list) self.call_tests(checker_tests, test_parameters['test']) def run(self): for test_name in self.tests: self.run_test(test_name) # clear cache _download_and_check_if_image.cache_clear() # force a garbage collector gc.collect()