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searxng/searx/webapp.py

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#!/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, <asciimoo@gmail.com>
'''
import sys
if sys.version_info[0] < 3:
print('\033[1;31m Python2 is no longer supported\033[0m')
exit(1)
if __name__ == '__main__':
from os.path import realpath, dirname
sys.path.append(realpath(dirname(realpath(__file__)) + '/../'))
# 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)
return render_template(
'{}/{}'.format(kwargs['theme'], template_name), **kwargs)
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()
request.timings = []
request.errors = []
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
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())
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 = []
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))]
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)]
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()
# 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 if median else None,
'rate80': rate80 if rate80 else None,
'rate95': rate95 if rate95 else None,
'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()
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