#!/usr/bin/env python ''' searx is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. searx is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with searx. If not, see < http://www.gnu.org/licenses/ >. (C) 2013- by Adam Tauber, ''' import sys if sys.version_info[0] < 3: print('\033[1;31m Python2 is no longer supported\033[0m') exit(1) # set Unix thread name try: import setproctitle except ImportError: pass else: import threading old_thread_init = threading.Thread.__init__ def new_thread_init(self, *args, **kwargs): old_thread_init(self, *args, **kwargs) setproctitle.setthreadtitle(self._name) threading.Thread.__init__ = new_thread_init import hashlib import hmac import json import os import httpx from searx import logger logger = logger.getChild('webapp') from datetime import datetime, timedelta from timeit import default_timer from html import escape from io import StringIO import urllib from urllib.parse import urlencode, urlparse from pygments import highlight from pygments.lexers import get_lexer_by_name from pygments.formatters import HtmlFormatter # pylint: disable=no-name-in-module from werkzeug.middleware.proxy_fix import ProxyFix from flask import ( Flask, request, render_template, url_for, Response, make_response, redirect, send_from_directory ) from babel.support import Translations import flask_babel from flask_babel import Babel, gettext, format_date, format_decimal from flask.ctx import has_request_context from flask.json import jsonify from searx import brand, static_path from searx import settings, searx_dir, searx_debug from searx.exceptions import SearxParameterException from searx.engines import categories, engines, engine_shortcuts from searx.webutils import ( UnicodeWriter, highlight_content, get_resources_directory, get_static_files, get_result_templates, get_themes, prettify_url, new_hmac, is_flask_run_cmdline ) from searx.webadapter import get_search_query_from_webapp, get_selected_categories from searx.utils import html_to_text, gen_useragent, dict_subset, match_language from searx.version import VERSION_STRING from searx.languages import language_codes as languages from searx.search import SearchWithPlugins, initialize as search_initialize from searx.search.checker import get_result as checker_get_result from searx.query import RawTextQuery from searx.autocomplete import search_autocomplete, backends as autocomplete_backends from searx.plugins import plugins from searx.plugins.oa_doi_rewrite import get_doi_resolver from searx.preferences import Preferences, ValidationException, LANGUAGE_CODES from searx.answerers import answerers from searx.network import stream as http_stream from searx.answerers import ask from searx.metrics import get_engines_stats, get_engine_errors, get_reliabilities, histogram, counter # serve pages with HTTP/1.1 from werkzeug.serving import WSGIRequestHandler WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server'].get('http_protocol_version', '1.0')) # check secret_key if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey': logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.') exit(1) # about static static_path = get_resources_directory(searx_dir, 'static', settings['ui']['static_path']) logger.debug('static directory is %s', static_path) static_files = get_static_files(static_path) # about templates default_theme = settings['ui']['default_theme'] templates_path = get_resources_directory(searx_dir, 'templates', settings['ui']['templates_path']) logger.debug('templates directory is %s', templates_path) themes = get_themes(templates_path) result_templates = get_result_templates(templates_path) global_favicons = [] for indice, theme in enumerate(themes): global_favicons.append([]) theme_img_path = os.path.join(static_path, 'themes', theme, 'img', 'icons') for (dirpath, dirnames, filenames) in os.walk(theme_img_path): global_favicons[indice].extend(filenames) # Flask app app = Flask( __name__, static_folder=static_path, template_folder=templates_path ) app.jinja_env.trim_blocks = True app.jinja_env.lstrip_blocks = True app.jinja_env.add_extension('jinja2.ext.loopcontrols') # pylint: disable=no-member app.secret_key = settings['server']['secret_key'] # see https://flask.palletsprojects.com/en/1.1.x/cli/ # True if "FLASK_APP=searx/webapp.py FLASK_ENV=development flask run" flask_run_development = \ os.environ.get("FLASK_APP") is not None\ and os.environ.get("FLASK_ENV") == 'development'\ and is_flask_run_cmdline() # True if reload feature is activated of werkzeug, False otherwise (including uwsgi, etc..) # __name__ != "__main__" if searx.webapp is imported (make test, make docs, uwsgi...) # see run() at the end of this file : searx_debug activates the reload feature. werkzeug_reloader = flask_run_development or (searx_debug and __name__ == "__main__") # initialize the engines except on the first run of the werkzeug server. if not werkzeug_reloader\ or (werkzeug_reloader and os.environ.get("WERKZEUG_RUN_MAIN") == "true"): search_initialize(enable_checker=True) babel = Babel(app) rtl_locales = ['ar', 'arc', 'bcc', 'bqi', 'ckb', 'dv', 'fa', 'fa_IR', 'glk', 'he', 'ku', 'mzn', 'pnb', 'ps', 'sd', 'ug', 'ur', 'yi'] ui_locale_codes = [l.replace('_', '-') for l in settings['locales'].keys()] # used when translating category names _category_names = (gettext('files'), gettext('general'), gettext('music'), gettext('social media'), gettext('images'), gettext('videos'), gettext('it'), gettext('news'), gettext('map'), gettext('onions'), gettext('science')) # timeout_text = gettext('timeout') parsing_error_text = gettext('parsing error') http_protocol_error_text = gettext('HTTP protocol error') network_error_text = gettext('network error') exception_classname_to_text = { None: gettext('unexpected crash'), 'timeout': timeout_text, 'asyncio.TimeoutError': timeout_text, 'httpx.TimeoutException': timeout_text, 'httpx.ConnectTimeout': timeout_text, 'httpx.ReadTimeout': timeout_text, 'httpx.WriteTimeout': timeout_text, 'httpx.HTTPStatusError': gettext('HTTP error'), 'httpx.ConnectError': gettext("HTTP connection error"), 'httpx.RemoteProtocolError': http_protocol_error_text, 'httpx.LocalProtocolError': http_protocol_error_text, 'httpx.ProtocolError': http_protocol_error_text, 'httpx.ReadError': network_error_text, 'httpx.WriteError': network_error_text, 'httpx.ProxyError': gettext("proxy error"), 'searx.exceptions.SearxEngineCaptchaException': gettext("CAPTCHA"), 'searx.exceptions.SearxEngineTooManyRequestsException': gettext("too many requests"), 'searx.exceptions.SearxEngineAccessDeniedException': gettext("access denied"), 'searx.exceptions.SearxEngineAPIException': gettext("server API error"), 'searx.exceptions.SearxEngineXPathException': parsing_error_text, 'KeyError': parsing_error_text, 'json.decoder.JSONDecodeError': parsing_error_text, 'lxml.etree.ParserError': parsing_error_text, } _flask_babel_get_translations = flask_babel.get_translations # monkey patch for flask_babel.get_translations def _get_translations(): if has_request_context() and request.form.get('use-translation') == 'oc': babel_ext = flask_babel.current_app.extensions['babel'] return Translations.load(next(babel_ext.translation_directories), 'oc') return _flask_babel_get_translations() flask_babel.get_translations = _get_translations def _get_browser_or_settings_language(request, lang_list): for lang in request.headers.get("Accept-Language", "en").split(","): if ';' in lang: lang = lang.split(';')[0] if '-' in lang: lang_parts = lang.split('-') lang = "{}-{}".format(lang_parts[0], lang_parts[-1].upper()) locale = match_language(lang, lang_list, fallback=None) if locale is not None: return locale return settings['search']['default_lang'] or 'en' @babel.localeselector def get_locale(): if 'locale' in request.form\ and request.form['locale'] in settings['locales']: # use locale from the form locale = request.form['locale'] locale_source = 'form' elif request.preferences.get_value('locale') != '': # use locale from the preferences locale = request.preferences.get_value('locale') locale_source = 'preferences' else: # use local from the browser locale = _get_browser_or_settings_language(request, ui_locale_codes) locale = locale.replace('-', '_') locale_source = 'browser' # see _get_translations function # and https://github.com/searx/searx/pull/1863 if locale == 'oc': request.form['use-translation'] = 'oc' locale = 'fr_FR' logger.debug( "%s uses locale `%s` from %s", urllib.parse.quote(request.url), locale, locale_source ) return locale # code-highlighter @app.template_filter('code_highlighter') def code_highlighter(codelines, language=None): if not language: language = 'text' try: # find lexer by programing language lexer = get_lexer_by_name(language, stripall=True) except: # if lexer is not found, using default one logger.debug('highlighter cannot find lexer for {0}'.format(language)) lexer = get_lexer_by_name('text', stripall=True) html_code = '' tmp_code = '' last_line = None # parse lines for line, code in codelines: if not last_line: line_code_start = line # new codeblock is detected if last_line is not None and\ last_line + 1 != line: # highlight last codepart formatter = HtmlFormatter(linenos='inline', linenostart=line_code_start, cssclass="code-highlight") html_code = html_code + highlight(tmp_code, lexer, formatter) # reset conditions for next codepart tmp_code = '' line_code_start = line # add codepart tmp_code += code + '\n' # update line last_line = line # highlight last codepart formatter = HtmlFormatter(linenos='inline', linenostart=line_code_start, cssclass="code-highlight") html_code = html_code + highlight(tmp_code, lexer, formatter) return html_code # Extract domain from url @app.template_filter('extract_domain') def extract_domain(url): return urlparse(url)[1] def get_base_url(): return url_for('index', _external=True) def get_current_theme_name(override=None): """Returns theme name. Checks in this order: 1. override 2. cookies 3. settings""" if override and (override in themes or override == '__common__'): return override theme_name = request.args.get('theme', request.preferences.get_value('theme')) if theme_name not in themes: theme_name = default_theme return theme_name def get_result_template(theme, template_name): themed_path = theme + '/result_templates/' + template_name if themed_path in result_templates: return themed_path return 'result_templates/' + template_name def url_for_theme(endpoint, override_theme=None, **values): if endpoint == 'static' and values.get('filename'): theme_name = get_current_theme_name(override=override_theme) filename_with_theme = "themes/{}/{}".format(theme_name, values['filename']) if filename_with_theme in static_files: values['filename'] = filename_with_theme url = url_for(endpoint, **values) return url def proxify(url): if url.startswith('//'): url = 'https:' + url if not settings.get('result_proxy'): return url url_params = dict(mortyurl=url.encode()) if settings['result_proxy'].get('key'): url_params['mortyhash'] = hmac.new(settings['result_proxy']['key'], url.encode(), hashlib.sha256).hexdigest() return '{0}?{1}'.format(settings['result_proxy']['url'], urlencode(url_params)) def image_proxify(url): if url.startswith('//'): url = 'https:' + url if not request.preferences.get_value('image_proxy'): return url if url.startswith('data:image/'): # 50 is an arbitrary number to get only the beginning of the image. partial_base64 = url[len('data:image/'):50].split(';') if len(partial_base64) == 2 \ and partial_base64[0] in ['gif', 'png', 'jpeg', 'pjpeg', 'webp', 'tiff', 'bmp']\ and partial_base64[1].startswith('base64,'): return url else: return None if settings.get('result_proxy'): return proxify(url) h = new_hmac(settings['server']['secret_key'], url.encode()) return '{0}?{1}'.format(url_for('image_proxy'), urlencode(dict(url=url.encode(), h=h))) def get_translations(): return { # when overpass AJAX request fails (on a map result) 'could_not_load': gettext('could not load data'), # when there is autocompletion 'no_item_found': gettext('No item found') } def render(template_name, override_theme=None, **kwargs): disabled_engines = request.preferences.engines.get_disabled() enabled_categories = set(category for engine_name in engines for category in engines[engine_name].categories if (engine_name, category) not in disabled_engines) if 'categories' not in kwargs: kwargs['categories'] = [x for x in _get_ordered_categories() if x in enabled_categories] if 'autocomplete' not in kwargs: kwargs['autocomplete'] = request.preferences.get_value('autocomplete') locale = request.preferences.get_value('locale') if locale in rtl_locales and 'rtl' not in kwargs: kwargs['rtl'] = True kwargs['searx_version'] = VERSION_STRING kwargs['method'] = request.preferences.get_value('method') kwargs['safesearch'] = str(request.preferences.get_value('safesearch')) kwargs['language_codes'] = languages if 'current_language' not in kwargs: kwargs['current_language'] = match_language(request.preferences.get_value('language'), LANGUAGE_CODES) # override url_for function in templates kwargs['url_for'] = url_for_theme kwargs['image_proxify'] = image_proxify kwargs['proxify'] = proxify if settings.get('result_proxy', {}).get('url') else None kwargs['proxify_results'] = settings.get('result_proxy', {}).get('proxify_results', True) kwargs['opensearch_url'] = url_for('opensearch') + '?' \ + urlencode({'method': kwargs['method'], 'autocomplete': kwargs['autocomplete']}) kwargs['get_result_template'] = get_result_template kwargs['theme'] = get_current_theme_name(override=override_theme) kwargs['template_name'] = template_name kwargs['cookies'] = request.cookies kwargs['errors'] = request.errors kwargs['instance_name'] = settings['general']['instance_name'] kwargs['results_on_new_tab'] = request.preferences.get_value('results_on_new_tab') kwargs['preferences'] = request.preferences kwargs['brand'] = brand kwargs['translations'] = json.dumps(get_translations(), separators=(',', ':')) kwargs['scripts'] = set() kwargs['endpoint'] = 'results' if 'q' in kwargs else request.endpoint for plugin in request.user_plugins: for script in plugin.js_dependencies: kwargs['scripts'].add(script) kwargs['styles'] = set() for plugin in request.user_plugins: for css in plugin.css_dependencies: kwargs['styles'].add(css) start_time = default_timer() result = render_template( '{}/{}'.format(kwargs['theme'], template_name), **kwargs) request.render_time += default_timer() - start_time # pylint: disable=assigning-non-slot return result def _get_ordered_categories(): ordered_categories = [] if 'categories_order' not in settings['ui']: ordered_categories = ['general'] ordered_categories.extend(x for x in sorted(categories.keys()) if x != 'general') return ordered_categories ordered_categories = settings['ui']['categories_order'] ordered_categories.extend(x for x in sorted(categories.keys()) if x not in ordered_categories) return ordered_categories @app.before_request def pre_request(): request.start_time = default_timer() # pylint: disable=assigning-non-slot request.render_time = 0 # pylint: disable=assigning-non-slot request.timings = [] # pylint: disable=assigning-non-slot request.errors = [] # pylint: disable=assigning-non-slot preferences = Preferences(themes, list(categories.keys()), engines, plugins) user_agent = request.headers.get('User-Agent', '').lower() if 'webkit' in user_agent and 'android' in user_agent: preferences.key_value_settings['method'].value = 'GET' request.preferences = preferences # pylint: disable=assigning-non-slot try: preferences.parse_dict(request.cookies) except: request.errors.append(gettext('Invalid settings, please edit your preferences')) # merge GET, POST vars # request.form request.form = dict(request.form.items()) # pylint: disable=assigning-non-slot for k, v in request.args.items(): if k not in request.form: request.form[k] = v if request.form.get('preferences'): preferences.parse_encoded_data(request.form['preferences']) else: try: preferences.parse_dict(request.form) except Exception: logger.exception('invalid settings') request.errors.append(gettext('Invalid settings')) # init search language and locale if not preferences.get_value("language"): preferences.parse_dict({"language": _get_browser_or_settings_language(request, LANGUAGE_CODES)}) if not preferences.get_value("locale"): preferences.parse_dict({"locale": get_locale()}) # request.user_plugins request.user_plugins = [] # pylint: disable=assigning-non-slot allowed_plugins = preferences.plugins.get_enabled() disabled_plugins = preferences.plugins.get_disabled() for plugin in plugins: if ((plugin.default_on and plugin.id not in disabled_plugins) or plugin.id in allowed_plugins): request.user_plugins.append(plugin) @app.after_request def add_default_headers(response): # set default http headers for header, value in settings['server'].get('default_http_headers', {}).items(): if header in response.headers: continue response.headers[header] = value return response @app.after_request def post_request(response): total_time = default_timer() - request.start_time timings_all = ['total;dur=' + str(round(total_time * 1000, 3)), 'render;dur=' + str(round(request.render_time * 1000, 3))] if len(request.timings) > 0: timings = sorted(request.timings, key=lambda v: v['total']) timings_total = ['total_' + str(i) + '_' + v['engine'] + ';dur=' + str(round(v['total'] * 1000, 3)) for i, v in enumerate(timings)] timings_load = ['load_' + str(i) + '_' + v['engine'] + ';dur=' + str(round(v['load'] * 1000, 3)) for i, v in enumerate(timings) if v.get('load')] timings_all = timings_all + timings_total + timings_load response.headers.add('Server-Timing', ', '.join(timings_all)) return response def index_error(output_format, error_message): if output_format == 'json': return Response(json.dumps({'error': error_message}), mimetype='application/json') elif output_format == 'csv': response = Response('', mimetype='application/csv') cont_disp = 'attachment;Filename=searx.csv' response.headers.add('Content-Disposition', cont_disp) return response elif output_format == 'rss': response_rss = render( 'opensearch_response_rss.xml', results=[], q=request.form['q'] if 'q' in request.form else '', number_of_results=0, base_url=get_base_url(), error_message=error_message, override_theme='__common__', ) return Response(response_rss, mimetype='text/xml') else: # html request.errors.append(gettext('search error')) return render( 'index.html', selected_categories=get_selected_categories(request.preferences, request.form), ) @app.route('/', methods=['GET', 'POST']) def index(): """Render index page.""" # UI advanced_search = request.preferences.get_value('advanced_search') # redirect to search if there's a query in the request if request.form.get('q'): query = ('?' + request.query_string.decode()) if request.query_string else '' return redirect(url_for('search') + query, 308) return render( 'index.html', selected_categories=get_selected_categories(request.preferences, request.form), advanced_search=advanced_search, ) @app.route('/search', methods=['GET', 'POST']) def search(): """Search query in q and return results. Supported outputs: html, json, csv, rss. """ # output_format output_format = request.form.get('format', 'html') if output_format not in ['html', 'csv', 'json', 'rss']: output_format = 'html' # check if there is query (not None and not an empty string) if not request.form.get('q'): if output_format == 'html': return render( 'index.html', advanced_search=request.preferences.get_value('advanced_search'), selected_categories=get_selected_categories(request.preferences, request.form), ) else: return index_error(output_format, 'No query'), 400 # search search_query = None raw_text_query = None result_container = None try: search_query, raw_text_query, _, _ = get_search_query_from_webapp(request.preferences, request.form) # search = Search(search_query) # without plugins search = SearchWithPlugins(search_query, request.user_plugins, request) result_container = search.search() except SearxParameterException as e: logger.exception('search error: SearxParameterException') return index_error(output_format, e.message), 400 except Exception as e: logger.exception('search error') return index_error(output_format, gettext('search error')), 500 # results results = result_container.get_ordered_results() number_of_results = result_container.results_number() if number_of_results < result_container.results_length(): number_of_results = 0 # checkin for a external bang if result_container.redirect_url: return redirect(result_container.redirect_url) # Server-Timing header request.timings = result_container.get_timings() # pylint: disable=assigning-non-slot # output for result in results: if output_format == 'html': if 'content' in result and result['content']: result['content'] = highlight_content(escape(result['content'][:1024]), search_query.query) if 'title' in result and result['title']: result['title'] = highlight_content(escape(result['title'] or ''), search_query.query) else: if result.get('content'): result['content'] = html_to_text(result['content']).strip() # removing html content and whitespace duplications result['title'] = ' '.join(html_to_text(result['title']).strip().split()) if 'url' in result: result['pretty_url'] = prettify_url(result['url']) # TODO, check if timezone is calculated right if result.get('publishedDate'): # do not try to get a date from an empty string or a None type try: # test if publishedDate >= 1900 (datetime module bug) result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z') except ValueError: result['publishedDate'] = None else: if result['publishedDate'].replace(tzinfo=None) >= datetime.now() - timedelta(days=1): timedifference = datetime.now() - result['publishedDate'].replace(tzinfo=None) minutes = int((timedifference.seconds / 60) % 60) hours = int(timedifference.seconds / 60 / 60) if hours == 0: result['publishedDate'] = gettext('{minutes} minute(s) ago').format(minutes=minutes) else: result['publishedDate'] = gettext('{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes) # noqa else: result['publishedDate'] = format_date(result['publishedDate']) if output_format == 'json': return Response(json.dumps({'query': search_query.query, 'number_of_results': number_of_results, 'results': results, 'answers': list(result_container.answers), 'corrections': list(result_container.corrections), 'infoboxes': result_container.infoboxes, 'suggestions': list(result_container.suggestions), 'unresponsive_engines': __get_translated_errors(result_container.unresponsive_engines)}, # noqa default=lambda item: list(item) if isinstance(item, set) else item), mimetype='application/json') elif output_format == 'csv': csv = UnicodeWriter(StringIO()) keys = ('title', 'url', 'content', 'host', 'engine', 'score', 'type') csv.writerow(keys) for row in results: row['host'] = row['parsed_url'].netloc row['type'] = 'result' csv.writerow([row.get(key, '') for key in keys]) for a in result_container.answers: row = {'title': a, 'type': 'answer'} csv.writerow([row.get(key, '') for key in keys]) for a in result_container.suggestions: row = {'title': a, 'type': 'suggestion'} csv.writerow([row.get(key, '') for key in keys]) for a in result_container.corrections: row = {'title': a, 'type': 'correction'} csv.writerow([row.get(key, '') for key in keys]) csv.stream.seek(0) response = Response(csv.stream.read(), mimetype='application/csv') cont_disp = 'attachment;Filename=searx_-_{0}.csv'.format(search_query.query) response.headers.add('Content-Disposition', cont_disp) return response elif output_format == 'rss': response_rss = render( 'opensearch_response_rss.xml', results=results, answers=result_container.answers, corrections=result_container.corrections, suggestions=result_container.suggestions, q=request.form['q'], number_of_results=number_of_results, base_url=get_base_url(), override_theme='__common__', ) return Response(response_rss, mimetype='text/xml') # HTML output format # suggestions: use RawTextQuery to get the suggestion URLs with the same bang suggestion_urls = list(map(lambda suggestion: { 'url': raw_text_query.changeQuery(suggestion).getFullQuery(), 'title': suggestion }, result_container.suggestions)) correction_urls = list(map(lambda correction: { 'url': raw_text_query.changeQuery(correction).getFullQuery(), 'title': correction }, result_container.corrections)) # return render( 'results.html', results=results, q=request.form['q'], selected_categories=search_query.categories, pageno=search_query.pageno, time_range=search_query.time_range, number_of_results=format_decimal(number_of_results), suggestions=suggestion_urls, answers=result_container.answers, corrections=correction_urls, infoboxes=result_container.infoboxes, engine_data=result_container.engine_data, paging=result_container.paging, unresponsive_engines=__get_translated_errors(result_container.unresponsive_engines), current_language=match_language(search_query.lang, LANGUAGE_CODES, fallback=request.preferences.get_value("language")), base_url=get_base_url(), theme=get_current_theme_name(), favicons=global_favicons[themes.index(get_current_theme_name())], timeout_limit=request.form.get('timeout_limit', None) ) def __get_translated_errors(unresponsive_engines): translated_errors = [] # make a copy unresponsive_engines to avoid "RuntimeError: Set changed size during iteration" # it happens when an engine modifies the ResultContainer after the search_multiple_requests method # has stopped waiting for unresponsive_engine in list(unresponsive_engines): error_user_text = exception_classname_to_text.get(unresponsive_engine[1]) if not error_user_text: error_user_text = exception_classname_to_text[None] error_msg = gettext(error_user_text) if unresponsive_engine[2]: error_msg = "{} {}".format(error_msg, unresponsive_engine[2]) if unresponsive_engine[3]: error_msg = gettext('Suspended') + ': ' + error_msg translated_errors.append((unresponsive_engine[0], error_msg)) return sorted(translated_errors, key=lambda e: e[0]) @app.route('/about', methods=['GET']) def about(): """Render about page""" return render( 'about.html', ) @app.route('/autocompleter', methods=['GET', 'POST']) def autocompleter(): """Return autocompleter results""" # run autocompleter results = [] # set blocked engines disabled_engines = request.preferences.engines.get_disabled() # parse query raw_text_query = RawTextQuery(request.form.get('q', ''), disabled_engines) sug_prefix = raw_text_query.getQuery() # normal autocompletion results only appear if no inner results returned # and there is a query part if len(raw_text_query.autocomplete_list) == 0 and len(sug_prefix) > 0: # get language from cookie language = request.preferences.get_value('language') if not language or language == 'all': language = 'en' else: language = language.split('-')[0] # run autocompletion raw_results = search_autocomplete( request.preferences.get_value('autocomplete'), sug_prefix, language ) for result in raw_results: # attention: this loop will change raw_text_query object and this is # the reason why the sug_prefix was stored before (see above) results.append(raw_text_query.changeQuery(result).getFullQuery()) if len(raw_text_query.autocomplete_list) > 0: for autocomplete_text in raw_text_query.autocomplete_list: results.append(raw_text_query.get_autocomplete_full_query(autocomplete_text)) for answers in ask(raw_text_query): for answer in answers: results.append(str(answer['answer'])) if request.headers.get('X-Requested-With') == 'XMLHttpRequest': # the suggestion request comes from the searx search form suggestions = json.dumps(results) mimetype = 'application/json' else: # the suggestion request comes from browser's URL bar suggestions = json.dumps([sug_prefix, results]) mimetype = 'application/x-suggestions+json' return Response(suggestions, mimetype=mimetype) @app.route('/preferences', methods=['GET', 'POST']) def preferences(): """Render preferences page && save user preferences""" # save preferences if request.method == 'POST': resp = make_response(redirect(url_for('index', _external=True))) try: request.preferences.parse_form(request.form) except ValidationException: request.errors.append(gettext('Invalid settings, please edit your preferences')) return resp return request.preferences.save(resp) # render preferences image_proxy = request.preferences.get_value('image_proxy') disabled_engines = request.preferences.engines.get_disabled() allowed_plugins = request.preferences.plugins.get_enabled() # stats for preferences page filtered_engines = dict(filter(lambda kv: (kv[0], request.preferences.validate_token(kv[1])), engines.items())) engines_by_category = {} for c in categories: engines_by_category[c] = [e for e in categories[c] if e.name in filtered_engines] # sort the engines alphabetically since the order in settings.yml is meaningless. list.sort(engines_by_category[c], key=lambda e: e.name) # get first element [0], the engine time, # and then the second element [1] : the time (the first one is the label) stats = {} max_rate95 = 0 for _, e in filtered_engines.items(): h = histogram('engine', e.name, 'time', 'total') median = round(h.percentage(50), 1) if h.count > 0 else None rate80 = round(h.percentage(80), 1) if h.count > 0 else None rate95 = round(h.percentage(95), 1) if h.count > 0 else None max_rate95 = max(max_rate95, rate95 or 0) result_count_sum = histogram('engine', e.name, 'result', 'count').sum successful_count = counter('engine', e.name, 'search', 'count', 'successful') result_count = int(result_count_sum / float(successful_count)) if successful_count else 0 stats[e.name] = { 'time': median, 'rate80': rate80, 'rate95': rate95, 'warn_timeout': e.timeout > settings['outgoing']['request_timeout'], 'supports_selected_language': _is_selected_language_supported(e, request.preferences), 'result_count': result_count, } # end of stats # reliabilities reliabilities = {} engine_errors = get_engine_errors(filtered_engines) checker_results = checker_get_result() checker_results = checker_results['engines'] \ if checker_results['status'] == 'ok' and 'engines' in checker_results else {} for _, e in filtered_engines.items(): checker_result = checker_results.get(e.name, {}) checker_success = checker_result.get('success', True) errors = engine_errors.get(e.name) or [] if counter('engine', e.name, 'search', 'count', 'sent') == 0: # no request reliablity = None elif checker_success and not errors: reliablity = 100 elif 'simple' in checker_result.get('errors', {}): # the basic (simple) test doesn't work: the engine is broken accoding to the checker # even if there is no exception reliablity = 0 else: reliablity = 100 - sum([error['percentage'] for error in errors if not error.get('secondary')]) reliabilities[e.name] = { 'reliablity': reliablity, 'errors': [], 'checker': checker_results.get(e.name, {}).get('errors', {}).keys(), } # keep the order of the list checker_results[e.name]['errors'] and deduplicate. # the first element has the highest percentage rate. reliabilities_errors = [] for error in errors: error_user_text = None if error.get('secondary') or 'exception_classname' not in error: continue error_user_text = exception_classname_to_text.get(error.get('exception_classname')) if not error: error_user_text = exception_classname_to_text[None] if error_user_text not in reliabilities_errors: reliabilities_errors.append(error_user_text) reliabilities[e.name]['errors'] = reliabilities_errors # supports supports = {} for _, e in filtered_engines.items(): supports_selected_language = _is_selected_language_supported(e, request.preferences) safesearch = e.safesearch time_range_support = e.time_range_support for checker_test_name in checker_results.get(e.name, {}).get('errors', {}): if supports_selected_language and checker_test_name.startswith('lang_'): supports_selected_language = '?' elif safesearch and checker_test_name == 'safesearch': safesearch = '?' elif time_range_support and checker_test_name == 'time_range': time_range_support = '?' supports[e.name] = { 'supports_selected_language': supports_selected_language, 'safesearch': safesearch, 'time_range_support': time_range_support, } # locked_preferences = list() if 'preferences' in settings and 'lock' in settings['preferences']: locked_preferences = settings['preferences']['lock'] # return render('preferences.html', selected_categories=get_selected_categories(request.preferences, request.form), all_categories=_get_ordered_categories(), locales=settings['locales'], current_locale=request.preferences.get_value("locale"), image_proxy=image_proxy, engines_by_category=engines_by_category, stats=stats, max_rate95=max_rate95, reliabilities=reliabilities, supports=supports, answerers=[{'info': a.self_info(), 'keywords': a.keywords} for a in answerers], disabled_engines=disabled_engines, autocomplete_backends=autocomplete_backends, shortcuts={y: x for x, y in engine_shortcuts.items()}, themes=themes, plugins=plugins, doi_resolvers=settings['doi_resolvers'], current_doi_resolver=get_doi_resolver(request.args, request.preferences.get_value('doi_resolver')), allowed_plugins=allowed_plugins, theme=get_current_theme_name(), preferences_url_params=request.preferences.get_as_url_params(), base_url=get_base_url(), locked_preferences=locked_preferences, preferences=True) def _is_selected_language_supported(engine, preferences): language = preferences.get_value('language') return (language == 'all' or match_language(language, getattr(engine, 'supported_languages', []), getattr(engine, 'language_aliases', {}), None)) @app.route('/image_proxy', methods=['GET']) def image_proxy(): url = request.args.get('url') if not url: return '', 400 h = new_hmac(settings['server']['secret_key'], url.encode()) if h != request.args.get('h'): return '', 400 maximum_size = 5 * 1024 * 1024 try: headers = dict_subset(request.headers, {'If-Modified-Since', 'If-None-Match'}) headers['User-Agent'] = gen_useragent() stream = http_stream( method='GET', url=url, headers=headers, timeout=settings['outgoing']['request_timeout'], allow_redirects=True, max_redirects=20) resp = next(stream) content_length = resp.headers.get('Content-Length') if content_length and content_length.isdigit() and int(content_length) > maximum_size: return 'Max size', 400 if resp.status_code == 304: return '', resp.status_code if resp.status_code != 200: logger.debug('image-proxy: wrong response code: {0}'.format(resp.status_code)) if resp.status_code >= 400: return '', resp.status_code return '', 400 if not resp.headers.get('content-type', '').startswith('image/'): logger.debug('image-proxy: wrong content-type: {0}'.format(resp.headers.get('content-type'))) return '', 400 headers = dict_subset(resp.headers, {'Content-Length', 'Length', 'Date', 'Last-Modified', 'Expires', 'Etag'}) total_length = 0 def forward_chunk(): nonlocal total_length for chunk in stream: total_length += len(chunk) if total_length > maximum_size: break yield chunk return Response(forward_chunk(), mimetype=resp.headers['Content-Type'], headers=headers) except httpx.HTTPError: return '', 400 @app.route('/stats', methods=['GET']) def stats(): """Render engine statistics page.""" sort_order = request.args.get('sort', default='name', type=str) selected_engine_name = request.args.get('engine', default=None, type=str) filtered_engines = dict(filter(lambda kv: (kv[0], request.preferences.validate_token(kv[1])), engines.items())) if selected_engine_name: if selected_engine_name not in filtered_engines: selected_engine_name = None else: filtered_engines = [selected_engine_name] checker_results = checker_get_result() checker_results = checker_results['engines'] \ if checker_results['status'] == 'ok' and 'engines' in checker_results else {} engine_stats = get_engines_stats(filtered_engines) engine_reliabilities = get_reliabilities(filtered_engines, checker_results) SORT_PARAMETERS = { 'name': (False, 'name', ''), 'score': (True, 'score', 0), 'result_count': (True, 'result_count', 0), 'time': (False, 'total', 0), 'reliability': (False, 'reliability', 100), } if sort_order not in SORT_PARAMETERS: sort_order = 'name' reverse, key_name, default_value = SORT_PARAMETERS[sort_order] def get_key(engine_stat): reliability = engine_reliabilities.get(engine_stat['name']).get('reliablity', 0) reliability_order = 0 if reliability else 1 if key_name == 'reliability': key = reliability reliability_order = 0 else: key = engine_stat.get(key_name) or default_value if reverse: reliability_order = 1 - reliability_order return (reliability_order, key, engine_stat['name']) engine_stats['time'] = sorted(engine_stats['time'], reverse=reverse, key=get_key) return render( 'stats.html', sort_order=sort_order, engine_stats=engine_stats, engine_reliabilities=engine_reliabilities, selected_engine_name=selected_engine_name, ) @app.route('/stats/errors', methods=['GET']) def stats_errors(): filtered_engines = dict(filter(lambda kv: (kv[0], request.preferences.validate_token(kv[1])), engines.items())) result = get_engine_errors(filtered_engines) return jsonify(result) @app.route('/stats/checker', methods=['GET']) def stats_checker(): result = checker_get_result() return jsonify(result) @app.route('/robots.txt', methods=['GET']) def robots(): return Response("""User-agent: * Allow: / Allow: /about Disallow: /stats Disallow: /preferences Disallow: /*?*q=* """, mimetype='text/plain') @app.route('/opensearch.xml', methods=['GET']) def opensearch(): method = 'post' if request.preferences.get_value('method') == 'GET': method = 'get' # chrome/chromium only supports HTTP GET.... if request.headers.get('User-Agent', '').lower().find('webkit') >= 0: method = 'get' ret = render( 'opensearch.xml', opensearch_method=method, override_theme='__common__' ) resp = Response(response=ret, status=200, mimetype="application/opensearchdescription+xml") return resp @app.route('/favicon.ico') def favicon(): return send_from_directory(os.path.join(app.root_path, static_path, 'themes', get_current_theme_name(), 'img'), 'favicon.png', mimetype='image/vnd.microsoft.icon') @app.route('/clear_cookies') def clear_cookies(): resp = make_response(redirect(url_for('index', _external=True))) for cookie_name in request.cookies: resp.delete_cookie(cookie_name) return resp @app.route('/config') def config(): """Return configuration in JSON format.""" _engines = [] for name, engine in engines.items(): if not request.preferences.validate_token(engine): continue supported_languages = engine.supported_languages if isinstance(engine.supported_languages, dict): supported_languages = list(engine.supported_languages.keys()) _engines.append({ 'name': name, 'categories': engine.categories, 'shortcut': engine.shortcut, 'enabled': not engine.disabled, 'paging': engine.paging, 'language_support': engine.language_support, 'supported_languages': supported_languages, 'safesearch': engine.safesearch, 'time_range_support': engine.time_range_support, 'timeout': engine.timeout }) _plugins = [] for _ in plugins: _plugins.append({'name': _.name, 'enabled': _.default_on}) return jsonify({ 'categories': list(categories.keys()), 'engines': _engines, 'plugins': _plugins, 'instance_name': settings['general']['instance_name'], 'locales': settings['locales'], 'default_locale': settings['ui']['default_locale'], 'autocomplete': settings['search']['autocomplete'], 'safe_search': settings['search']['safe_search'], 'default_theme': settings['ui']['default_theme'], 'version': VERSION_STRING, 'brand': { 'CONTACT_URL': brand.CONTACT_URL, 'GIT_URL': brand.GIT_URL, 'DOCS_URL': brand.DOCS_URL }, 'doi_resolvers': [r for r in settings['doi_resolvers']], 'default_doi_resolver': settings['default_doi_resolver'], }) @app.errorhandler(404) def page_not_found(e): return render('404.html'), 404 def run(): logger.debug('starting webserver on %s:%s', settings['server']['bind_address'], settings['server']['port']) app.run( debug=searx_debug, use_debugger=searx_debug, port=settings['server']['port'], host=settings['server']['bind_address'], threaded=True ) class ReverseProxyPathFix: '''Wrap the application in this middleware and configure the front-end server to add these headers, to let you quietly bind this to a URL other than / and to an HTTP scheme that is different than what is used locally. http://flask.pocoo.org/snippets/35/ In nginx: location /myprefix { proxy_pass http://127.0.0.1:8000; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Scheme $scheme; proxy_set_header X-Script-Name /myprefix; } :param app: the WSGI application ''' def __init__(self, app): self.app = app self.script_name = None self.scheme = None self.server = None if settings['server']['base_url']: # If base_url is specified, then these values from are given # preference over any Flask's generics. base_url = urlparse(settings['server']['base_url']) self.script_name = base_url.path if self.script_name.endswith('/'): # remove trailing slash to avoid infinite redirect on the index # see https://github.com/searx/searx/issues/2729 self.script_name = self.script_name[:-1] self.scheme = base_url.scheme self.server = base_url.netloc def __call__(self, environ, start_response): script_name = self.script_name or environ.get('HTTP_X_SCRIPT_NAME', '') if script_name: environ['SCRIPT_NAME'] = script_name path_info = environ['PATH_INFO'] if path_info.startswith(script_name): environ['PATH_INFO'] = path_info[len(script_name):] scheme = self.scheme or environ.get('HTTP_X_SCHEME', '') if scheme: environ['wsgi.url_scheme'] = scheme server = self.server or environ.get('HTTP_X_FORWARDED_HOST', '') if server: environ['HTTP_HOST'] = server return self.app(environ, start_response) application = app # patch app to handle non root url-s behind proxy & wsgi app.wsgi_app = ReverseProxyPathFix(ProxyFix(application.wsgi_app)) if __name__ == "__main__": run()