mirror of
https://github.com/searxng/searxng.git
synced 2024-11-14 00:30:15 +01:00
761 lines
25 KiB
Python
761 lines
25 KiB
Python
#!/usr/bin/env python
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'''
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searx is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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searx is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with searx. If not, see < http://www.gnu.org/licenses/ >.
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(C) 2013- by Adam Tauber, <asciimoo@gmail.com>
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'''
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if __name__ == '__main__':
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from sys import path
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from os.path import realpath, dirname
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path.append(realpath(dirname(realpath(__file__)) + '/../'))
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import json
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import cStringIO
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import os
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import hashlib
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import requests
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from searx import logger
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logger = logger.getChild('webapp')
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try:
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from pygments import highlight
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from pygments.lexers import get_lexer_by_name
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from pygments.formatters import HtmlFormatter
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except:
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logger.critical("cannot import dependency: pygments")
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from sys import exit
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exit(1)
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from datetime import datetime, timedelta
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from urllib import urlencode
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from urlparse import urlparse, urljoin
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from werkzeug.contrib.fixers import ProxyFix
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from flask import (
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Flask, request, render_template, url_for, Response, make_response,
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redirect, send_from_directory
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)
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from flask_babel import Babel, gettext, format_date, format_decimal
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from flask.json import jsonify
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from searx import settings, searx_dir
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from searx.engines import (
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categories, engines, get_engines_stats, engine_shortcuts
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)
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from searx.utils import (
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UnicodeWriter, highlight_content, html_to_text, get_themes,
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get_static_files, get_result_templates, gen_useragent, dict_subset,
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prettify_url
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)
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from searx.version import VERSION_STRING
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from searx.languages import language_codes
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from searx.search import Search
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from searx.query import Query
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from searx.autocomplete import searx_bang, backends as autocomplete_backends
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from searx.plugins import plugins
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from searx.preferences import Preferences, ValidationException
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# check if the pyopenssl, ndg-httpsclient, pyasn1 packages are installed.
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# They are needed for SSL connection without trouble, see #298
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try:
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import OpenSSL.SSL # NOQA
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import ndg.httpsclient # NOQA
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import pyasn1 # NOQA
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except ImportError:
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logger.critical("The pyopenssl, ndg-httpsclient, pyasn1 packages have to be installed.\n"
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"Some HTTPS connections will fail")
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static_path, templates_path, themes =\
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get_themes(settings['ui']['themes_path']
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if settings['ui']['themes_path']
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else searx_dir)
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default_theme = settings['ui']['default_theme']
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static_files = get_static_files(searx_dir)
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result_templates = get_result_templates(searx_dir)
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app = Flask(
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__name__,
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static_folder=static_path,
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template_folder=templates_path
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)
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app.jinja_env.trim_blocks = True
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app.jinja_env.lstrip_blocks = True
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app.secret_key = settings['server']['secret_key']
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babel = Babel(app)
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rtl_locales = ['ar', 'arc', 'bcc', 'bqi', 'ckb', 'dv', 'fa', 'glk', 'he',
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'ku', 'mzn', 'pnb'', ''ps', 'sd', 'ug', 'ur', 'yi']
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global_favicons = []
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for indice, theme in enumerate(themes):
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global_favicons.append([])
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theme_img_path = searx_dir + "/static/themes/" + theme + "/img/icons/"
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for (dirpath, dirnames, filenames) in os.walk(theme_img_path):
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global_favicons[indice].extend(filenames)
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# used when translating category names
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_category_names = (gettext('files'),
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gettext('general'),
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gettext('music'),
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gettext('social media'),
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gettext('images'),
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gettext('videos'),
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gettext('it'),
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gettext('news'),
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gettext('map'),
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gettext('science'))
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outgoing_proxies = settings['outgoing'].get('proxies', None)
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@babel.localeselector
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def get_locale():
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locale = request.accept_languages.best_match(settings['locales'].keys())
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if request.preferences.get_value('locale') != '':
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locale = request.preferences.get_value('locale')
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if 'locale' in request.args\
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and request.args['locale'] in settings['locales']:
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locale = request.args['locale']
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if 'locale' in request.form\
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and request.form['locale'] in settings['locales']:
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locale = request.form['locale']
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return locale
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# code-highlighter
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@app.template_filter('code_highlighter')
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def code_highlighter(codelines, language=None):
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if not language:
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language = 'text'
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try:
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# find lexer by programing language
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lexer = get_lexer_by_name(language, stripall=True)
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except:
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# if lexer is not found, using default one
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logger.debug('highlighter cannot find lexer for {0}'.format(language))
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lexer = get_lexer_by_name('text', stripall=True)
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html_code = ''
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tmp_code = ''
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last_line = None
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# parse lines
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for line, code in codelines:
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if not last_line:
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line_code_start = line
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# new codeblock is detected
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if last_line is not None and\
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last_line + 1 != line:
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# highlight last codepart
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formatter = HtmlFormatter(linenos='inline',
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linenostart=line_code_start)
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html_code = html_code + highlight(tmp_code, lexer, formatter)
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# reset conditions for next codepart
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tmp_code = ''
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line_code_start = line
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# add codepart
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tmp_code += code + '\n'
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# update line
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last_line = line
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# highlight last codepart
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formatter = HtmlFormatter(linenos='inline', linenostart=line_code_start)
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html_code = html_code + highlight(tmp_code, lexer, formatter)
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return html_code
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# Extract domain from url
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@app.template_filter('extract_domain')
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def extract_domain(url):
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return urlparse(url)[1]
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def get_base_url():
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if settings['server']['base_url']:
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hostname = settings['server']['base_url']
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else:
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scheme = 'http'
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if request.is_secure:
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scheme = 'https'
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hostname = url_for('index', _external=True, _scheme=scheme)
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return hostname
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def get_current_theme_name(override=None):
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"""Returns theme name.
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Checks in this order:
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1. override
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2. cookies
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3. settings"""
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if override and override in themes:
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return override
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theme_name = request.args.get('theme', request.preferences.get_value('theme'))
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if theme_name not in themes:
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theme_name = default_theme
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return theme_name
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def get_result_template(theme, template_name):
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themed_path = theme + '/result_templates/' + template_name
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if themed_path in result_templates:
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return themed_path
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return 'result_templates/' + template_name
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def url_for_theme(endpoint, override_theme=None, **values):
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if endpoint == 'static' and values.get('filename'):
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theme_name = get_current_theme_name(override=override_theme)
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filename_with_theme = "themes/{}/{}".format(theme_name, values['filename'])
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if filename_with_theme in static_files:
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values['filename'] = filename_with_theme
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return url_for(endpoint, **values)
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def image_proxify(url):
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if url.startswith('//'):
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url = 'https:' + url
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if not request.preferences.get_value('image_proxy'):
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return url
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hash_string = url + settings['server']['secret_key']
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h = hashlib.sha256(hash_string.encode('utf-8')).hexdigest()
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return '{0}?{1}'.format(url_for('image_proxy'),
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urlencode(dict(url=url.encode('utf-8'), h=h)))
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def render(template_name, override_theme=None, **kwargs):
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disabled_engines = request.preferences.engines.get_disabled()
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enabled_categories = set(category for engine_name in engines
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for category in engines[engine_name].categories
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if (engine_name, category) not in disabled_engines)
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if 'categories' not in kwargs:
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kwargs['categories'] = ['general']
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kwargs['categories'].extend(x for x in
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sorted(categories.keys())
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if x != 'general'
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and x in enabled_categories)
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if 'all_categories' not in kwargs:
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kwargs['all_categories'] = ['general']
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kwargs['all_categories'].extend(x for x in
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sorted(categories.keys())
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if x != 'general')
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if 'selected_categories' not in kwargs:
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kwargs['selected_categories'] = []
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for arg in request.args:
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if arg.startswith('category_'):
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c = arg.split('_', 1)[1]
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if c in categories:
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kwargs['selected_categories'].append(c)
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if not kwargs['selected_categories']:
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cookie_categories = request.preferences.get_value('categories')
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for ccateg in cookie_categories:
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kwargs['selected_categories'].append(ccateg)
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if not kwargs['selected_categories']:
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kwargs['selected_categories'] = ['general']
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if 'autocomplete' not in kwargs:
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kwargs['autocomplete'] = request.preferences.get_value('autocomplete')
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if get_locale() in rtl_locales and 'rtl' not in kwargs:
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kwargs['rtl'] = True
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kwargs['searx_version'] = VERSION_STRING
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kwargs['method'] = request.preferences.get_value('method')
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kwargs['safesearch'] = str(request.preferences.get_value('safesearch'))
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# override url_for function in templates
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kwargs['url_for'] = url_for_theme
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kwargs['image_proxify'] = image_proxify
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kwargs['get_result_template'] = get_result_template
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kwargs['theme'] = get_current_theme_name(override=override_theme)
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kwargs['template_name'] = template_name
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kwargs['cookies'] = request.cookies
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kwargs['instance_name'] = settings['general']['instance_name']
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kwargs['scripts'] = set()
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for plugin in request.user_plugins:
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for script in plugin.js_dependencies:
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kwargs['scripts'].add(script)
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kwargs['styles'] = set()
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for plugin in request.user_plugins:
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for css in plugin.css_dependencies:
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kwargs['styles'].add(css)
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return render_template(
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'{}/{}'.format(kwargs['theme'], template_name), **kwargs)
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@app.before_request
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def pre_request():
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# merge GET, POST vars
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preferences = Preferences(themes, categories.keys(), engines, plugins)
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preferences.parse_cookies(request.cookies)
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request.preferences = preferences
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request.form = dict(request.form.items())
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for k, v in request.args.items():
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if k not in request.form:
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request.form[k] = v
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request.user_plugins = []
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allowed_plugins = preferences.plugins.get_enabled()
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disabled_plugins = preferences.plugins.get_disabled()
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for plugin in plugins:
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if ((plugin.default_on and plugin.id not in disabled_plugins)
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or plugin.id in allowed_plugins):
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request.user_plugins.append(plugin)
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@app.route('/search', methods=['GET', 'POST'])
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@app.route('/', methods=['GET', 'POST'])
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def index():
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"""Render index page.
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Supported outputs: html, json, csv, rss.
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"""
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if not request.args and not request.form:
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return render(
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'index.html',
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)
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try:
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search = Search(request)
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except:
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return render(
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'index.html',
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)
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if plugins.call('pre_search', request, locals()):
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search.search(request)
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plugins.call('post_search', request, locals())
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for result in search.result_container.get_ordered_results():
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plugins.call('on_result', request, locals())
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if not search.paging and engines[result['engine']].paging:
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search.paging = True
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if search.request_data.get('format', 'html') == 'html':
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if 'content' in result:
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result['content'] = highlight_content(result['content'],
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search.query.encode('utf-8')) # noqa
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result['title'] = highlight_content(result['title'],
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search.query.encode('utf-8'))
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else:
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if result.get('content'):
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result['content'] = html_to_text(result['content']).strip()
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# removing html content and whitespace duplications
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result['title'] = ' '.join(html_to_text(result['title']).strip().split())
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result['pretty_url'] = prettify_url(result['url'])
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# TODO, check if timezone is calculated right
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if 'publishedDate' in result:
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try: # test if publishedDate >= 1900 (datetime module bug)
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result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z')
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except ValueError:
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result['publishedDate'] = None
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else:
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if result['publishedDate'].replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
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timedifference = datetime.now() - result['publishedDate'].replace(tzinfo=None)
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minutes = int((timedifference.seconds / 60) % 60)
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hours = int(timedifference.seconds / 60 / 60)
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if hours == 0:
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result['publishedDate'] = gettext(u'{minutes} minute(s) ago').format(minutes=minutes)
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else:
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result['publishedDate'] = gettext(u'{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes) # noqa
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else:
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result['publishedDate'] = format_date(result['publishedDate'])
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if search.request_data.get('format') == 'json':
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return Response(json.dumps({'query': search.query,
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'number_of_results': search.result_container.number_of_results,
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'results': search.result_container.get_ordered_results()}),
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mimetype='application/json')
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elif search.request_data.get('format') == 'csv':
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csv = UnicodeWriter(cStringIO.StringIO())
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keys = ('title', 'url', 'content', 'host', 'engine', 'score')
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csv.writerow(keys)
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for row in search.result_container.get_ordered_results():
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row['host'] = row['parsed_url'].netloc
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csv.writerow([row.get(key, '') for key in keys])
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csv.stream.seek(0)
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response = Response(csv.stream.read(), mimetype='application/csv')
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cont_disp = 'attachment;Filename=searx_-_{0}.csv'.format(search.query.encode('utf-8'))
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response.headers.add('Content-Disposition', cont_disp)
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return response
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elif search.request_data.get('format') == 'rss':
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response_rss = render(
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'opensearch_response_rss.xml',
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results=search.result_container.get_ordered_results(),
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q=search.request_data['q'],
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number_of_results=search.result_container.number_of_results,
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base_url=get_base_url()
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)
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return Response(response_rss, mimetype='text/xml')
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return render(
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'results.html',
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results=search.result_container.get_ordered_results(),
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q=search.request_data['q'],
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selected_categories=search.categories,
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paging=search.paging,
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number_of_results=format_decimal(search.result_container.number_of_results),
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pageno=search.pageno,
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base_url=get_base_url(),
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suggestions=search.result_container.suggestions,
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answers=search.result_container.answers,
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infoboxes=search.result_container.infoboxes,
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theme=get_current_theme_name(),
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favicons=global_favicons[themes.index(get_current_theme_name())]
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)
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@app.route('/about', methods=['GET'])
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def about():
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"""Render about page"""
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return render(
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'about.html',
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)
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@app.route('/autocompleter', methods=['GET', 'POST'])
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def autocompleter():
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"""Return autocompleter results"""
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request_data = {}
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# select request method
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if request.method == 'POST':
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request_data = request.form
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else:
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request_data = request.args
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# set blocked engines
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disabled_engines = request.preferences.engines.get_disabled()
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# parse query
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query = Query(request_data.get('q', '').encode('utf-8'), disabled_engines)
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query.parse_query()
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# check if search query is set
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if not query.getSearchQuery():
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return '', 400
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# run autocompleter
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completer = autocomplete_backends.get(request.preferences.get_value('autocomplete'))
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# parse searx specific autocompleter results like !bang
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raw_results = searx_bang(query)
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# normal autocompletion results only appear if max 3 inner results returned
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if len(raw_results) <= 3 and completer:
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# get language from cookie
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language = request.preferences.get_value('language')
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if not language or language == 'all':
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language = 'en'
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else:
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language = language.split('_')[0]
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# run autocompletion
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raw_results.extend(completer(query.getSearchQuery(), language))
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# parse results (write :language and !engine back to result string)
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results = []
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for result in raw_results:
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query.changeSearchQuery(result)
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# add parsed result
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results.append(query.getFullQuery())
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# return autocompleter results
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if request_data.get('format') == 'x-suggestions':
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return Response(json.dumps([query.query, results]),
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mimetype='application/json')
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|
|
return Response(json.dumps(results),
|
|
mimetype='application/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:
|
|
# TODO use flash feature of flask
|
|
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 = {}
|
|
|
|
for c in categories:
|
|
for e in categories[c]:
|
|
stats[e.name] = {'time': None,
|
|
'warn_timeout': False,
|
|
'warn_time': False}
|
|
if e.timeout > settings['outgoing']['request_timeout']:
|
|
stats[e.name]['warn_timeout'] = True
|
|
|
|
for engine_stat in get_engines_stats()[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=get_locale(),
|
|
current_language=lang,
|
|
image_proxy=image_proxy,
|
|
language_codes=language_codes,
|
|
engines_by_category=categories,
|
|
stats=stats,
|
|
disabled_engines=disabled_engines,
|
|
autocomplete_backends=autocomplete_backends,
|
|
shortcuts={y: x for x, y in engine_shortcuts.items()},
|
|
themes=themes,
|
|
plugins=plugins,
|
|
allowed_plugins=allowed_plugins,
|
|
theme=get_current_theme_name())
|
|
|
|
|
|
@app.route('/image_proxy', methods=['GET'])
|
|
def image_proxy():
|
|
url = request.args.get('url').encode('utf-8')
|
|
|
|
if not url:
|
|
return '', 400
|
|
|
|
h = hashlib.sha256(url + settings['server']['secret_key'].encode('utf-8')).hexdigest()
|
|
|
|
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 = ''
|
|
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()
|
|
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
|
|
""", 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)
|
|
|
|
resp = Response(response=ret,
|
|
status=200,
|
|
mimetype="text/xml")
|
|
return resp
|
|
|
|
|
|
@app.route('/favicon.ico')
|
|
def favicon():
|
|
return send_from_directory(os.path.join(app.root_path,
|
|
'static/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 jsonify({'categories': categories.keys(),
|
|
'engines': [{'name': engine_name,
|
|
'categories': engine.categories,
|
|
'shortcut': engine.shortcut,
|
|
'enabled': not engine.disabled}
|
|
for engine_name, engine in engines.items()],
|
|
'plugins': [{'name': plugin.name,
|
|
'enabled': plugin.default_on}
|
|
for plugin in 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']})
|
|
|
|
|
|
def run():
|
|
app.run(
|
|
debug=settings['general']['debug'],
|
|
use_debugger=settings['general']['debug'],
|
|
port=settings['server']['port'],
|
|
host=settings['server']['bind_address']
|
|
)
|
|
|
|
|
|
class ReverseProxyPathFix(object):
|
|
'''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()
|