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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__)) + '/../'))
import hashlib
import hmac
import json
import os
import requests
from searx import logger
logger = logger.getChild('webapp')
from datetime import datetime, timedelta
from time import time
from html import escape
from io import StringIO
from urllib.parse import urlencode, urlparse, urljoin
from pygments import highlight
from pygments.lexers import get_lexer_by_name
from pygments.formatters import HtmlFormatter
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, get_engines_stats, initialize_engines
)
from searx.utils import (
UnicodeWriter, highlight_content, html_to_text, get_resources_directory,
get_static_files, get_result_templates, get_themes, gen_useragent,
dict_subset, prettify_url, match_language
)
from searx.version import VERSION_STRING
from searx.languages import language_codes as languages
from searx.search import SearchWithPlugins, get_search_query_from_webapp
from searx.query import RawTextQuery
from searx.autocomplete import searx_bang, 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.utils import new_hmac
# check if the pyopenssl package is installed.
# It is needed for SSL connection without trouble, see #298
try:
import OpenSSL.SSL # NOQA
except ImportError:
logger.critical("The pyopenssl package has to be installed.\n"
"Some HTTPS connections will fail")
# serve pages with HTTP/1.1
from werkzeug.serving import WSGIRequestHandler
WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server'].get('http_protocol_version', '1.0'))
# 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')
app.secret_key = settings['server']['secret_key']
if not searx_debug \
or os.environ.get("WERKZEUG_RUN_MAIN") == "true" \
or os.environ.get('UWSGI_ORIGINAL_PROC_NAME') is not None:
initialize_engines(settings['engines'])
babel = Babel(app)
rtl_locales = ['ar', 'arc', 'bcc', 'bqi', 'ckb', 'dv', 'fa', 'fa_IR', 'glk', 'he',
'ku', 'mzn', 'pnb', 'ps', 'sd', 'ug', 'ur', 'yi']
# 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('science'))
outgoing_proxies = settings['outgoing'].get('proxies') or None
_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_language(request, lang_list):
for lang in request.headers.get("Accept-Language", "en").split(","):
if ';' in lang:
lang = lang.split(';')[0]
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():
locale = _get_browser_language(request, settings['locales'].keys())
logger.debug("default locale from browser info is `%s`", locale)
if request.preferences.get_value('locale') != '':
locale = request.preferences.get_value('locale')
if 'locale' in request.form\
and request.form['locale'] in settings['locales']:
locale = request.form['locale']
if locale == 'zh_TW':
locale = 'zh_Hant_TW'
if locale == 'oc':
request.form['use-translation'] = 'oc'
locale = 'fr_FR'
logger.debug("selected locale is `%s`", locale)
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)
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)
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():
if settings['server']['base_url']:
hostname = settings['server']['base_url']
else:
scheme = 'http'
if request.is_secure:
scheme = 'https'
hostname = url_for('index', _external=True, _scheme=scheme)
return hostname
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
return url_for(endpoint, **values)
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 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 'all_categories' not in kwargs:
kwargs['all_categories'] = _get_ordered_categories()
if 'selected_categories' not in kwargs:
kwargs['selected_categories'] = []
for arg in request.args:
if arg.startswith('category_'):
c = arg.split('_', 1)[1]
if c in categories:
kwargs['selected_categories'].append(c)
if not kwargs['selected_categories']:
cookie_categories = request.preferences.get_value('categories')
for ccateg in cookie_categories:
kwargs['selected_categories'].append(ccateg)
if not kwargs['selected_categories']:
kwargs['selected_categories'] = ['general']
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['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['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 = time()
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 as e:
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_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 post_request(response):
total_time = time() - 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',
)
@app.route('/search', methods=['GET', 'POST'])
@app.route('/', methods=['GET', 'POST'])
def index():
"""Render index page.
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
if request.form.get('q') is None:
if output_format == 'html':
return render(
'index.html',
)
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 Exception as e:
# log exception
logger.exception('search error')
# is it an invalid input parameter or something else ?
if (issubclass(e.__class__, SearxParameterException)):
return index_error(output_format, e.message), 400
else:
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)
# UI
advanced_search = request.form.get('advanced_search', None)
# 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 'publishedDate' in result:
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.decode(),
'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.decode())
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.changeSearchQuery(suggestion).getFullQuery(),
'title': suggestion
},
result_container.suggestions))
correction_urls = list(map(lambda correction: {
'url': raw_text_query.changeSearchQuery(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),
advanced_search=advanced_search,
suggestions=suggestion_urls,
answers=result_container.answers,
corrections=correction_urls,
infoboxes=result_container.infoboxes,
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 = []
for unresponsive_engine in unresponsive_engines:
error_msg = gettext(unresponsive_engine[1])
if unresponsive_engine[2]:
error_msg = "{} {}".format(error_msg, unresponsive_engine[2])
translated_errors.append((unresponsive_engine[0], error_msg))
return translated_errors
@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"""
# set blocked engines
disabled_engines = request.preferences.engines.get_disabled()
# parse query
raw_text_query = RawTextQuery(request.form.get('q', b''), disabled_engines)
raw_text_query.parse_query()
# check if search query is set
if not raw_text_query.getSearchQuery():
return '', 400
# run autocompleter
completer = autocomplete_backends.get(request.preferences.get_value('autocomplete'))
# parse searx specific autocompleter results like !bang
raw_results = searx_bang(raw_text_query)
# normal autocompletion results only appear if no inner results returned
# and there is a query part besides the engine and language bangs
if len(raw_results) == 0 and completer and (len(raw_text_query.query_parts) > 1 or
(len(raw_text_query.languages) == 0 and
not raw_text_query.specific)):
# 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.extend(completer(raw_text_query.getSearchQuery(), language))
# parse results (write :language and !engine back to result string)
results = []
for result in raw_results:
raw_text_query.changeSearchQuery(result)
# add parsed result
results.append(raw_text_query.getFullQuery())
# return autocompleter results
if request.headers.get('X-Requested-With') == 'XMLHttpRequest':
return Response(json.dumps(results),
mimetype='application/json')
return Response(json.dumps([raw_text_query.query, results]),
mimetype='application/x-suggestions+json')
@app.route('/preferences', methods=['GET', 'POST'])
def preferences():
"""Render preferences page && save user preferences"""
# save preferences
if request.method == 'POST':
resp = make_response(redirect(urljoin(settings['server']['base_url'], url_for('index'))))
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')
lang = request.preferences.get_value('language')
disabled_engines = request.preferences.engines.get_disabled()
allowed_plugins = request.preferences.plugins.get_enabled()
# stats for preferences page
stats = {}
engines_by_category = {}
for c in categories:
engines_by_category[c] = []
for e in categories[c]:
if not request.preferences.validate_token(e):
continue
stats[e.name] = {'time': None,
'warn_timeout': False,
'warn_time': False}
if e.timeout > settings['outgoing']['request_timeout']:
stats[e.name]['warn_timeout'] = True
stats[e.name]['supports_selected_language'] = _is_selected_language_supported(e, request.preferences)
engines_by_category[c].append(e)
# get first element [0], the engine time,
# and then the second element [1] : the time (the first one is the label)
for engine_stat in get_engines_stats(request.preferences)[0][1]:
stats[engine_stat.get('name')]['time'] = round(engine_stat.get('avg'), 3)
if engine_stat.get('avg') > settings['outgoing']['request_timeout']:
stats[engine_stat.get('name')]['warn_time'] = True
# end of stats
return render('preferences.html',
locales=settings['locales'],
current_locale=request.preferences.get_value("locale"),
image_proxy=image_proxy,
engines_by_category=engines_by_category,
stats=stats,
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(),
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').encode()
if not url:
return '', 400
h = new_hmac(settings['server']['secret_key'], url)
if h != request.args.get('h'):
return '', 400
headers = dict_subset(request.headers, {'If-Modified-Since', 'If-None-Match'})
headers['User-Agent'] = gen_useragent()
resp = requests.get(url,
stream=True,
timeout=settings['outgoing']['request_timeout'],
headers=headers,
proxies=outgoing_proxies)
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
img = b''
chunk_counter = 0
for chunk in resp.iter_content(1024 * 1024):
chunk_counter += 1
if chunk_counter > 5:
return '', 502 # Bad gateway - file is too big (>5M)
img += chunk
headers = dict_subset(resp.headers, {'Content-Length', 'Length', 'Date', 'Last-Modified', 'Expires', 'Etag'})
return Response(img, mimetype=resp.headers['content-type'], headers=headers)
@app.route('/stats', methods=['GET'])
def stats():
"""Render engine statistics page."""
stats = get_engines_stats(request.preferences)
return render(
'stats.html',
stats=stats,
)
@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,
host=get_base_url(),
urljoin=urljoin,
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(urljoin(settings['server']['base_url'], url_for('index'))))
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': {
'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.route('/translations.js')
def js_translations():
return render(
'translations.js.tpl',
override_theme='__common__',
), {'Content-Type': 'text/javascript; charset=UTF-8'}
@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
def __call__(self, environ, start_response):
script_name = 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 = environ.get('HTTP_X_SCHEME', '')
if scheme:
environ['wsgi.url_scheme'] = scheme
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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