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Merge pull request #100 from return42/webapp-pylint

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[pylint] webapp.py
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Alexandre Flament 3 years ago committed by GitHub
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docs/blog/python3.rst
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@ -25,19 +25,16 @@ How to run searx using Python 3
Please make sure that you run at least Python 3.5. Please make sure that you run at least Python 3.5.
To run searx, first a Python3 virtualenv should be created. After entering the To run searx, first a Python3 virtualenv should be created. After entering the
virtualenv, dependencies must be installed. Then run searx with python3 instead virtualenv, dependencies and searx must be installed. Then run searx from the
of the usual python command. command line.
.. code:: sh .. code:: sh
virtualenv -p python3 venv3 python3 -m venv venv3
source venv3/bin/activate source venv3/bin/activate
pip3 install -r requirements.txt pip install -U pip setuptools wheel pyyaml
python3 searx/webapp.py pip install -e .
searx-run
If you want to run searx using Python2.7, you don't have to do anything
differently as before.
Fun facts Fun facts
========= =========

329
searx/webapp.py
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@ -1,109 +1,147 @@
#!/usr/bin/env python #!/usr/bin/env python
# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
# pylint: disable=missing-function-docstring
"""WebbApp
''' """
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 hashlib
import hmac import hmac
import json import json
import os import os
import sys
import httpx
from searx import logger
logger = logger.getChild('webapp')
from datetime import datetime, timedelta from datetime import datetime, timedelta
from timeit import default_timer from timeit import default_timer
from html import escape from html import escape
from io import StringIO from io import StringIO
import urllib import urllib
from urllib.parse import urlencode, urlparse from urllib.parse import (
urlencode,
urlparse,
)
import httpx
from pygments import highlight from pygments import highlight
from pygments.lexers import get_lexer_by_name from pygments.lexers import get_lexer_by_name
from pygments.formatters import HtmlFormatter # pylint: disable=no-name-in-module from pygments.formatters import HtmlFormatter # pylint: disable=no-name-in-module
from werkzeug.middleware.proxy_fix import ProxyFix from werkzeug.middleware.proxy_fix import ProxyFix
from werkzeug.serving import WSGIRequestHandler
from flask import ( from flask import (
Flask, request, render_template, url_for, Response, make_response, Flask,
redirect, send_from_directory 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.ctx import has_request_context
from flask.json import jsonify from flask.json import jsonify
from babel.support import Translations
import flask_babel
from flask_babel import (
Babel,
gettext,
format_date,
format_decimal,
)
from searx import logger
from searx import brand, static_path from searx import brand, static_path
from searx import settings, searx_dir, searx_debug from searx import (
settings,
searx_dir,
searx_debug,
)
from searx.exceptions import SearxParameterException from searx.exceptions import SearxParameterException
from searx.engines import categories, engines, engine_shortcuts from searx.engines import (
categories,
engines,
engine_shortcuts,
)
from searx.webutils import ( from searx.webutils import (
UnicodeWriter, highlight_content, get_resources_directory, UnicodeWriter,
get_static_files, get_result_templates, get_themes, highlight_content,
prettify_url, new_hmac, is_flask_run_cmdline 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.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.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.query import RawTextQuery
from searx.autocomplete import search_autocomplete, backends as autocomplete_backends
from searx.plugins import plugins from searx.plugins import plugins
from searx.plugins.oa_doi_rewrite import get_doi_resolver from searx.plugins.oa_doi_rewrite import get_doi_resolver
from searx.preferences import Preferences, ValidationException, LANGUAGE_CODES from searx.preferences import (
Preferences,
ValidationException,
LANGUAGE_CODES,
)
from searx.answerers import answerers from searx.answerers import answerers
from searx.network import stream as http_stream
from searx.answerers import ask from searx.answerers import ask
from searx.metrics import get_engines_stats, get_engine_errors, get_reliabilities, histogram, counter from searx.metrics import (
get_engines_stats,
get_engine_errors,
get_reliabilities,
histogram,
counter,
)
# renaming names from searx imports ...
from searx.autocomplete import search_autocomplete, backends as autocomplete_backends
from searx.languages import language_codes as languages
from searx.search import SearchWithPlugins, initialize as search_initialize
from searx.network import stream as http_stream
from searx.search.checker import get_result as checker_get_result
# 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):
# pylint: disable=protected-access, disable=c-extension-no-member
old_thread_init(self, *args, **kwargs)
setproctitle.setthreadtitle(self._name)
threading.Thread.__init__ = new_thread_init
if sys.version_info[0] < 3:
print('\033[1;31m Python2 is no longer supported\033[0m')
sys.exit(1)
logger = logger.getChild('webapp')
# serve pages with HTTP/1.1 # serve pages with HTTP/1.1
from werkzeug.serving import WSGIRequestHandler
WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server'].get('http_protocol_version', '1.0')) WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server'].get('http_protocol_version', '1.0'))
# check secret_key # check secret_key
if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey': 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.') logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')
exit(1) sys.exit(1)
# about static # about static
static_path = get_resources_directory(searx_dir, 'static', settings['ui']['static_path']) static_path = get_resources_directory(searx_dir, 'static', settings['ui']['static_path'])
@ -123,6 +161,14 @@ for indice, theme in enumerate(themes):
for (dirpath, dirnames, filenames) in os.walk(theme_img_path): for (dirpath, dirnames, filenames) in os.walk(theme_img_path):
global_favicons[indice].extend(filenames) global_favicons[indice].extend(filenames)
STATS_SORT_PARAMETERS = {
'name': (False, 'name', ''),
'score': (True, 'score', 0),
'result_count': (True, 'result_count', 0),
'time': (False, 'total', 0),
'reliability': (False, 'reliability', 100),
}
# Flask app # Flask app
app = Flask( app = Flask(
__name__, __name__,
@ -217,8 +263,8 @@ def _get_translations():
flask_babel.get_translations = _get_translations flask_babel.get_translations = _get_translations
def _get_browser_or_settings_language(request, lang_list): def _get_browser_or_settings_language(req, lang_list):
for lang in request.headers.get("Accept-Language", "en").split(","): for lang in req.headers.get("Accept-Language", "en").split(","):
if ';' in lang: if ';' in lang:
lang = lang.split(';')[0] lang = lang.split(';')[0]
if '-' in lang: if '-' in lang:
@ -269,9 +315,10 @@ def code_highlighter(codelines, language=None):
try: try:
# find lexer by programing language # find lexer by programing language
lexer = get_lexer_by_name(language, stripall=True) lexer = get_lexer_by_name(language, stripall=True)
except:
except Exception as e: # pylint: disable=broad-except
logger.exception(e, exc_info=True)
# if lexer is not found, using default one # 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) lexer = get_lexer_by_name('text', stripall=True)
html_code = '' html_code = ''
@ -336,8 +383,8 @@ def get_current_theme_name(override=None):
return theme_name return theme_name
def get_result_template(theme, template_name): def get_result_template(theme_name, template_name):
themed_path = theme + '/result_templates/' + template_name themed_path = theme_name + '/result_templates/' + template_name
if themed_path in result_templates: if themed_path in result_templates:
return themed_path return themed_path
return 'result_templates/' + template_name return 'result_templates/' + template_name
@ -386,8 +433,7 @@ def image_proxify(url):
and partial_base64[0] in ['gif', 'png', 'jpeg', 'pjpeg', 'webp', 'tiff', 'bmp']\ and partial_base64[0] in ['gif', 'png', 'jpeg', 'pjpeg', 'webp', 'tiff', 'bmp']\
and partial_base64[1].startswith('base64,'): and partial_base64[1].startswith('base64,'):
return url return url
else: return None
return None
if settings.get('result_proxy'): if settings.get('result_proxy'):
return proxify(url) return proxify(url)
@ -506,14 +552,17 @@ def pre_request():
request.timings = [] # pylint: disable=assigning-non-slot request.timings = [] # pylint: disable=assigning-non-slot
request.errors = [] # pylint: disable=assigning-non-slot request.errors = [] # pylint: disable=assigning-non-slot
preferences = Preferences(themes, list(categories.keys()), engines, plugins) preferences = Preferences(themes, list(categories.keys()), engines, plugins) # pylint: disable=redefined-outer-name
user_agent = request.headers.get('User-Agent', '').lower() user_agent = request.headers.get('User-Agent', '').lower()
if 'webkit' in user_agent and 'android' in user_agent: if 'webkit' in user_agent and 'android' in user_agent:
preferences.key_value_settings['method'].value = 'GET' preferences.key_value_settings['method'].value = 'GET'
request.preferences = preferences # pylint: disable=assigning-non-slot request.preferences = preferences # pylint: disable=assigning-non-slot
try: try:
preferences.parse_dict(request.cookies) preferences.parse_dict(request.cookies)
except:
except Exception as e: # pylint: disable=broad-except
logger.exception(e, exc_info=True)
request.errors.append(gettext('Invalid settings, please edit your preferences')) request.errors.append(gettext('Invalid settings, please edit your preferences'))
# merge GET, POST vars # merge GET, POST vars
@ -528,8 +577,8 @@ def pre_request():
else: else:
try: try:
preferences.parse_dict(request.form) preferences.parse_dict(request.form)
except Exception: except Exception as e: # pylint: disable=broad-except
logger.exception('invalid settings') logger.exception(e, exc_info=True)
request.errors.append(gettext('Invalid settings')) request.errors.append(gettext('Invalid settings'))
# init search language and locale # init search language and locale
@ -578,12 +627,13 @@ def index_error(output_format, error_message):
if output_format == 'json': if output_format == 'json':
return Response(json.dumps({'error': error_message}), return Response(json.dumps({'error': error_message}),
mimetype='application/json') mimetype='application/json')
elif output_format == 'csv': if output_format == 'csv':
response = Response('', mimetype='application/csv') response = Response('', mimetype='application/csv')
cont_disp = 'attachment;Filename=searx.csv' cont_disp = 'attachment;Filename=searx.csv'
response.headers.add('Content-Disposition', cont_disp) response.headers.add('Content-Disposition', cont_disp)
return response return response
elif output_format == 'rss':
if output_format == 'rss':
response_rss = render( response_rss = render(
'opensearch_response_rss.xml', 'opensearch_response_rss.xml',
results=[], results=[],
@ -594,13 +644,13 @@ def index_error(output_format, error_message):
override_theme='__common__', override_theme='__common__',
) )
return Response(response_rss, mimetype='text/xml') return Response(response_rss, mimetype='text/xml')
else:
# html # html
request.errors.append(gettext('search error')) request.errors.append(gettext('search error'))
return render( return render(
'index.html', 'index.html',
selected_categories=get_selected_categories(request.preferences, request.form), selected_categories=get_selected_categories(request.preferences, request.form),
) )
@app.route('/', methods=['GET', 'POST']) @app.route('/', methods=['GET', 'POST'])
@ -628,6 +678,8 @@ def search():
Supported outputs: html, json, csv, rss. Supported outputs: html, json, csv, rss.
""" """
# pylint: disable=too-many-locals, too-many-return-statements, too-many-branches
# pylint: disable=too-many-statements
# output_format # output_format
output_format = request.form.get('format', 'html') output_format = request.form.get('format', 'html')
@ -642,8 +694,7 @@ def search():
advanced_search=request.preferences.get_value('advanced_search'), advanced_search=request.preferences.get_value('advanced_search'),
selected_categories=get_selected_categories(request.preferences, request.form), selected_categories=get_selected_categories(request.preferences, request.form),
) )
else: return index_error(output_format, 'No query'), 400
return index_error(output_format, 'No query'), 400
# search # search
search_query = None search_query = None
@ -652,15 +703,15 @@ def search():
try: try:
search_query, raw_text_query, _, _ = get_search_query_from_webapp(request.preferences, request.form) search_query, raw_text_query, _, _ = get_search_query_from_webapp(request.preferences, request.form)
# search = Search(search_query) # without plugins # search = Search(search_query) # without plugins
search = SearchWithPlugins(search_query, request.user_plugins, request) search = SearchWithPlugins(search_query, request.user_plugins, request) # pylint: disable=redefined-outer-name
result_container = search.search() result_container = search.search()
except SearxParameterException as e: except SearxParameterException as e:
logger.exception('search error: SearxParameterException') logger.exception('search error: SearxParameterException')
return index_error(output_format, e.message), 400 return index_error(output_format, e.message), 400
except Exception as e: except Exception as e: # pylint: disable=broad-except
logger.exception('search error') logger.exception(e, exc_info=True)
return index_error(output_format, gettext('search error')), 500 return index_error(output_format, gettext('search error')), 500
# results # results
@ -692,7 +743,7 @@ def search():
if 'url' in result: if 'url' in result:
result['pretty_url'] = prettify_url(result['url']) result['pretty_url'] = prettify_url(result['url'])
# TODO, check if timezone is calculated right # TODO, check if timezone is calculated right # pylint: disable=fixme
if result.get('publishedDate'): # do not try to get a date from an empty string or a None type 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) try: # test if publishedDate >= 1900 (datetime module bug)
result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z') result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z')
@ -706,22 +757,32 @@ def search():
if hours == 0: if hours == 0:
result['publishedDate'] = gettext('{minutes} minute(s) ago').format(minutes=minutes) result['publishedDate'] = gettext('{minutes} minute(s) ago').format(minutes=minutes)
else: else:
result['publishedDate'] = gettext('{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes) # noqa result['publishedDate'] = gettext(
'{hours} hour(s), {minutes} minute(s) ago').format(
hours=hours, minutes=minutes
)
else: else:
result['publishedDate'] = format_date(result['publishedDate']) result['publishedDate'] = format_date(result['publishedDate'])
if output_format == 'json': if output_format == 'json':
return Response(json.dumps({'query': search_query.query, return Response(
'number_of_results': number_of_results, json.dumps(
'results': results, {
'answers': list(result_container.answers), 'query': search_query.query,
'corrections': list(result_container.corrections), 'number_of_results': number_of_results,
'infoboxes': result_container.infoboxes, 'results': results,
'suggestions': list(result_container.suggestions), 'answers': list(result_container.answers),
'unresponsive_engines': __get_translated_errors(result_container.unresponsive_engines)}, # noqa 'corrections': list(result_container.corrections),
default=lambda item: list(item) if isinstance(item, set) else item), 'infoboxes': result_container.infoboxes,
mimetype='application/json') 'suggestions': list(result_container.suggestions),
elif output_format == 'csv': 'unresponsive_engines': __get_translated_errors(result_container.unresponsive_engines)
},
default = lambda item: list(item) if isinstance(item, set) else item
),
mimetype='application/json'
)
if output_format == 'csv':
csv = UnicodeWriter(StringIO()) csv = UnicodeWriter(StringIO())
keys = ('title', 'url', 'content', 'host', 'engine', 'score', 'type') keys = ('title', 'url', 'content', 'host', 'engine', 'score', 'type')
csv.writerow(keys) csv.writerow(keys)
@ -744,7 +805,7 @@ def search():
response.headers.add('Content-Disposition', cont_disp) response.headers.add('Content-Disposition', cont_disp)
return response return response
elif output_format == 'rss': if output_format == 'rss':
response_rss = render( response_rss = render(
'opensearch_response_rss.xml', 'opensearch_response_rss.xml',
results=results, results=results,
@ -882,6 +943,9 @@ def autocompleter():
def preferences(): def preferences():
"""Render preferences page && save user preferences""" """Render preferences page && save user preferences"""
# pylint: disable=too-many-locals, too-many-return-statements, too-many-branches
# pylint: disable=too-many-statements
# save preferences # save preferences
if request.method == 'POST': if request.method == 'POST':
resp = make_response(redirect(url_for('index', _external=True))) resp = make_response(redirect(url_for('index', _external=True)))
@ -893,7 +957,7 @@ def preferences():
return request.preferences.save(resp) return request.preferences.save(resp)
# render preferences # render preferences
image_proxy = request.preferences.get_value('image_proxy') image_proxy = request.preferences.get_value('image_proxy') # pylint: disable=redefined-outer-name
disabled_engines = request.preferences.engines.get_disabled() disabled_engines = request.preferences.engines.get_disabled()
allowed_plugins = request.preferences.plugins.get_enabled() allowed_plugins = request.preferences.plugins.get_enabled()
@ -908,7 +972,7 @@ def preferences():
# get first element [0], the engine time, # get first element [0], the engine time,
# and then the second element [1] : the time (the first one is the label) # and then the second element [1] : the time (the first one is the label)
stats = {} stats = {} # pylint: disable=redefined-outer-name
max_rate95 = 0 max_rate95 = 0
for _, e in filtered_engines.items(): for _, e in filtered_engines.items():
h = histogram('engine', e.name, 'time', 'total') h = histogram('engine', e.name, 'time', 'total')
@ -1025,7 +1089,7 @@ def preferences():
preferences=True) preferences=True)
def _is_selected_language_supported(engine, preferences): def _is_selected_language_supported(engine, preferences): # pylint: disable=redefined-outer-name
language = preferences.get_value('language') language = preferences.get_value('language')
return (language == 'all' return (language == 'all'
or match_language(language, or match_language(language,
@ -1035,6 +1099,8 @@ def _is_selected_language_supported(engine, preferences):
@app.route('/image_proxy', methods=['GET']) @app.route('/image_proxy', methods=['GET'])
def image_proxy(): def image_proxy():
# pylint: disable=too-many-return-statements
url = request.args.get('url') url = request.args.get('url')
if not url: if not url:
@ -1113,18 +1179,10 @@ def stats():
engine_stats = get_engines_stats(filtered_engines) engine_stats = get_engines_stats(filtered_engines)
engine_reliabilities = get_reliabilities(filtered_engines, checker_results) engine_reliabilities = get_reliabilities(filtered_engines, checker_results)
SORT_PARAMETERS = { if sort_order not in STATS_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' sort_order = 'name'
reverse, key_name, default_value = SORT_PARAMETERS[sort_order] reverse, key_name, default_value = STATS_SORT_PARAMETERS[sort_order]
def get_key(engine_stat): def get_key(engine_stat):
reliability = engine_reliabilities.get(engine_stat['name']).get('reliablity', 0) reliability = engine_reliabilities.get(engine_stat['name']).get('reliablity', 0)
@ -1197,14 +1255,16 @@ def opensearch():
@app.route('/favicon.ico') @app.route('/favicon.ico')
def favicon(): def favicon():
return send_from_directory(os.path.join(app.root_path, return send_from_directory(
static_path, os.path.join(
'themes', app.root_path,
get_current_theme_name(), static_path,
'img'), 'themes',
'favicon.png', get_current_theme_name(),
mimetype='image/vnd.microsoft.icon') 'img'),
'favicon.png',
mimetype = 'image/vnd.microsoft.icon'
)
@app.route('/clear_cookies') @app.route('/clear_cookies')
def clear_cookies(): def clear_cookies():
@ -1259,13 +1319,13 @@ def config():
'GIT_URL': brand.GIT_URL, 'GIT_URL': brand.GIT_URL,
'DOCS_URL': brand.DOCS_URL 'DOCS_URL': brand.DOCS_URL
}, },
'doi_resolvers': [r for r in settings['doi_resolvers']], 'doi_resolvers': list(settings['doi_resolvers'].keys()),
'default_doi_resolver': settings['default_doi_resolver'], 'default_doi_resolver': settings['default_doi_resolver'],
}) })
@app.errorhandler(404) @app.errorhandler(404)
def page_not_found(e): def page_not_found(_e):
return render('404.html'), 404 return render('404.html'), 404
@ -1297,12 +1357,13 @@ class ReverseProxyPathFix:
proxy_set_header X-Script-Name /myprefix; proxy_set_header X-Script-Name /myprefix;
} }
:param app: the WSGI application :param wsgi_app: the WSGI application
''' '''
# pylint: disable=too-few-public-methods
def __init__(self, app): def __init__(self, wsgi_app):
self.app = app self.wsgi_app = wsgi_app
self.script_name = None self.script_name = None
self.scheme = None self.scheme = None
self.server = None self.server = None
@ -1336,7 +1397,7 @@ class ReverseProxyPathFix:
server = self.server or environ.get('HTTP_X_FORWARDED_HOST', '') server = self.server or environ.get('HTTP_X_FORWARDED_HOST', '')
if server: if server:
environ['HTTP_HOST'] = server environ['HTTP_HOST'] = server
return self.app(environ, start_response) return self.wsgi_app(environ, start_response)
application = app application = app

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