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Merge pull request #135 from searxng/refactor-webapp

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Refactor webapp
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Alexandre Flament 2021-06-10 08:11:15 +02:00 committed by GitHub
parent 314e09091b 2a109d0a5f
commit 68df982e21
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4 changed files with 147 additions and 166 deletions
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1
searx/__init__.py
View file

@ -5,6 +5,7 @@
from os.path import dirname, abspath
import logging
import searx.unixthreadname
import searx.settings_loader
from searx.settings_defaults import settings_set_defaults

77
searx/flaskfix.py Normal file
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@ -0,0 +1,77 @@
# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
# pylint: disable=missing-module-docstring,missing-function-docstring
from urllib.parse import urlparse
from werkzeug.middleware.proxy_fix import ProxyFix
from werkzeug.serving import WSGIRequestHandler
from searx import settings
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 wsgi_app: the WSGI application
'''
# pylint: disable=too-few-public-methods
def __init__(self, wsgi_app):
self.wsgi_app = wsgi_app
self.script_name = None
self.scheme = None
self.server = None
if settings['server']['base_url']:
# If base_url is specified, then these values from are given
# preference over any Flask's generics.
base_url = urlparse(settings['server']['base_url'])
self.script_name = base_url.path
if self.script_name.endswith('/'):
# remove trailing slash to avoid infinite redirect on the index
# see https://github.com/searx/searx/issues/2729
self.script_name = self.script_name[:-1]
self.scheme = base_url.scheme
self.server = base_url.netloc
def __call__(self, environ, start_response):
script_name = self.script_name or environ.get('HTTP_X_SCRIPT_NAME', '')
if script_name:
environ['SCRIPT_NAME'] = script_name
path_info = environ['PATH_INFO']
if path_info.startswith(script_name):
environ['PATH_INFO'] = path_info[len(script_name):]
scheme = self.scheme or environ.get('HTTP_X_SCHEME', '')
if scheme:
environ['wsgi.url_scheme'] = scheme
server = self.server or environ.get('HTTP_X_FORWARDED_HOST', '')
if server:
environ['HTTP_HOST'] = server
return self.wsgi_app(environ, start_response)
def patch_application(app):
# serve pages with HTTP/1.1
WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server']['http_protocol_version'])
# patch app to handle non root url-s behind proxy & wsgi
app.wsgi_app = ReverseProxyPathFix(ProxyFix(app.wsgi_app))

20
searx/unixthreadname.py Normal file
View file

@ -0,0 +1,20 @@
# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""
if setproctitle is installed.
set Unix thread name with the Python 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, disable=missing-function-docstring
old_thread_init(self, *args, **kwargs)
setproctitle.setthreadtitle(self._name)
threading.Thread.__init__ = new_thread_init

215
searx/webapp.py
View file

@ -17,10 +17,7 @@ from html import escape
from io import StringIO
import urllib
from urllib.parse import (
urlencode,
urlparse,
)
from urllib.parse import urlencode
import httpx
@ -28,9 +25,6 @@ from pygments import highlight
from pygments.lexers import get_lexer_by_name
from pygments.formatters import HtmlFormatter # pylint: disable=no-name-in-module
from werkzeug.middleware.proxy_fix import ProxyFix
from werkzeug.serving import WSGIRequestHandler
import flask
from flask import (
@ -106,6 +100,7 @@ from searx.metrics import (
histogram,
counter,
)
from searx.flaskfix import patch_application
# renaming names from searx imports ...
@ -116,30 +111,8 @@ from searx.network import stream as http_stream
from searx.search.checker import get_result as checker_get_result
from searx.settings_loader import get_default_settings_path
# 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
WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server']['http_protocol_version'])
# check secret_key
if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey':
logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')
@ -358,16 +331,6 @@ def code_highlighter(codelines, language=None):
return html_code
# Extract domain from url
@app.template_filter('extract_domain')
def extract_domain(url):
return urlparse(url)[1]
def get_base_url():
return url_for('index', _external=True)
def get_current_theme_name(override=None):
"""Returns theme name.
@ -452,78 +415,76 @@ def get_translations():
}
def render(template_name, override_theme=None, **kwargs):
def _get_ordered_categories():
ordered_categories = list(settings['ui']['categories_order'])
ordered_categories.extend(x for x in sorted(categories.keys()) if x not in ordered_categories)
return ordered_categories
def _get_enable_categories(all_categories):
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)
for category in engines[engine_name].categories
if (engine_name, category) not in disabled_engines)
return [x for x in
all_categories
if x in enabled_categories]
if 'categories' not in kwargs:
kwargs['categories'] = [x for x in
_get_ordered_categories()
if x in enabled_categories]
if 'autocomplete' not in kwargs:
kwargs['autocomplete'] = request.preferences.get_value('autocomplete')
def render(template_name, override_theme=None, **kwargs):
# values from the HTTP requests
kwargs['endpoint'] = 'results' if 'q' in kwargs else request.endpoint
kwargs['cookies'] = request.cookies
kwargs['errors'] = request.errors
# values from the preferences
kwargs['preferences'] = request.preferences
kwargs['method'] = request.preferences.get_value('method')
kwargs['autocomplete'] = request.preferences.get_value('autocomplete')
kwargs['results_on_new_tab'] = request.preferences.get_value('results_on_new_tab')
kwargs['advanced_search'] = request.preferences.get_value('advanced_search')
kwargs['safesearch'] = str(request.preferences.get_value('safesearch'))
kwargs['theme'] = get_current_theme_name(override=override_theme)
kwargs['all_categories'] = _get_ordered_categories()
kwargs['categories'] = _get_enable_categories(kwargs['all_categories'])
# i18n
kwargs['language_codes'] = languages # from searx.languages
kwargs['translations'] = json.dumps(get_translations(), separators=(',', ':'))
locale = request.preferences.get_value('locale')
if locale in rtl_locales and 'rtl' not in kwargs:
kwargs['rtl'] = True
kwargs['searx_version'] = VERSION_STRING
kwargs['method'] = request.preferences.get_value('method')
kwargs['safesearch'] = str(request.preferences.get_value('safesearch'))
kwargs['language_codes'] = languages
if 'current_language' not in kwargs:
kwargs['current_language'] = match_language(request.preferences.get_value('language'),
LANGUAGE_CODES)
# override url_for function in templates
kwargs['url_for'] = url_for_theme
kwargs['image_proxify'] = image_proxify
kwargs['proxify'] = proxify if settings.get('result_proxy', {}).get('url') else None
kwargs['proxify_results'] = settings.get('result_proxy', {}).get('proxify_results', True)
kwargs['opensearch_url'] = url_for('opensearch') + '?' \
+ urlencode({'method': kwargs['method'], 'autocomplete': kwargs['autocomplete']})
kwargs['get_result_template'] = get_result_template
kwargs['theme'] = get_current_theme_name(override=override_theme)
kwargs['template_name'] = template_name
kwargs['cookies'] = request.cookies
kwargs['errors'] = request.errors
kwargs['instance_name'] = settings['general']['instance_name']
kwargs['results_on_new_tab'] = request.preferences.get_value('results_on_new_tab')
kwargs['preferences'] = request.preferences
# values from settings
kwargs['search_formats'] = [
x for x in settings['search']['formats']
if x != 'html']
# brand
kwargs['instance_name'] = settings['general']['instance_name']
kwargs['searx_version'] = VERSION_STRING
kwargs['brand'] = brand
kwargs['translations'] = json.dumps(get_translations(), separators=(',', ':'))
# helpers to create links to other pages
kwargs['url_for'] = url_for_theme # override url_for function in templates
kwargs['image_proxify'] = image_proxify
kwargs['proxify'] = proxify if settings.get('result_proxy', {}).get('url') else None
kwargs['proxify_results'] = settings.get('result_proxy', {}).get('proxify_results', True)
kwargs['get_result_template'] = get_result_template
kwargs['opensearch_url'] = url_for('opensearch') + '?' \
+ urlencode({'method': kwargs['method'], 'autocomplete': kwargs['autocomplete']})
# scripts from plugins
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)
# styles from plugins
kwargs['styles'] = set()
for plugin in request.user_plugins:
for css in plugin.css_dependencies:
@ -537,12 +498,6 @@ def render(template_name, override_theme=None, **kwargs):
return result
def _get_ordered_categories():
ordered_categories = list(settings['ui']['categories_order'])
ordered_categories.extend(x for x in sorted(categories.keys()) if x not in ordered_categories)
return ordered_categories
@app.before_request
def pre_request():
request.start_time = default_timer() # pylint: disable=assigning-non-slot
@ -637,7 +592,6 @@ def index_error(output_format, error_message):
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__',
)
@ -655,9 +609,6 @@ def index_error(output_format, error_message):
def index():
"""Render index page."""
# UI
advanced_search = request.preferences.get_value('advanced_search')
# redirect to search if there's a query in the request
if request.form.get('q'):
query = ('?' + request.query_string.decode()) if request.query_string else ''
@ -666,7 +617,6 @@ def index():
return render(
'index.html',
selected_categories=get_selected_categories(request.preferences, request.form),
advanced_search=advanced_search,
)
@ -692,7 +642,6 @@ def search():
if output_format == 'html':
return render(
'index.html',
advanced_search=request.preferences.get_value('advanced_search'),
selected_categories=get_selected_categories(request.preferences, request.form),
)
return index_error(output_format, 'No query'), 400
@ -815,7 +764,6 @@ def search():
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')
@ -853,7 +801,6 @@ def search():
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)
@ -1060,7 +1007,6 @@ def preferences():
#
return render('preferences.html',
selected_categories=get_selected_categories(request.preferences, request.form),
all_categories=_get_ordered_categories(),
locales=settings['locales'],
current_locale=request.preferences.get_value("locale"),
image_proxy=image_proxy,
@ -1080,7 +1026,6 @@ def preferences():
allowed_plugins=allowed_plugins,
theme=get_current_theme_name(),
preferences_url_params=request.preferences.get_as_url_params(),
base_url=get_base_url(),
locked_preferences=settings['preferences']['lock'],
preferences=True)
@ -1338,70 +1283,8 @@ def run():
],
)
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 wsgi_app: the WSGI application
'''
# pylint: disable=too-few-public-methods
def __init__(self, wsgi_app):
self.wsgi_app = wsgi_app
self.script_name = None
self.scheme = None
self.server = None
if settings['server']['base_url']:
# If base_url is specified, then these values from are given
# preference over any Flask's generics.
base_url = urlparse(settings['server']['base_url'])
self.script_name = base_url.path
if self.script_name.endswith('/'):
# remove trailing slash to avoid infinite redirect on the index
# see https://github.com/searx/searx/issues/2729
self.script_name = self.script_name[:-1]
self.scheme = base_url.scheme
self.server = base_url.netloc
def __call__(self, environ, start_response):
script_name = self.script_name or environ.get('HTTP_X_SCRIPT_NAME', '')
if script_name:
environ['SCRIPT_NAME'] = script_name
path_info = environ['PATH_INFO']
if path_info.startswith(script_name):
environ['PATH_INFO'] = path_info[len(script_name):]
scheme = self.scheme or environ.get('HTTP_X_SCHEME', '')
if scheme:
environ['wsgi.url_scheme'] = scheme
server = self.server or environ.get('HTTP_X_FORWARDED_HOST', '')
if server:
environ['HTTP_HOST'] = server
return self.wsgi_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))
patch_application(app)
if __name__ == "__main__":
run()