forked from zaclys/searxng
155 lines
5.2 KiB
Python
155 lines
5.2 KiB
Python
'''
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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) 2015 by Adam Tauber, <asciimoo@gmail.com>
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'''
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from hashlib import sha256
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from importlib import import_module
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from os.path import abspath, basename, dirname, exists, join
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from shutil import copyfile
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from sys import exit, version_info
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from traceback import print_exc
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from searx import logger, settings, static_path
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if version_info[0] == 3:
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unicode = str
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logger = logger.getChild('plugins')
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from searx.plugins import (oa_doi_rewrite,
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https_rewrite,
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infinite_scroll,
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open_results_on_new_tab,
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self_info,
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search_on_category_select,
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tracker_url_remover,
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vim_hotkeys)
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required_attrs = (('name', (str, unicode)),
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('description', (str, unicode)),
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('default_on', bool))
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optional_attrs = (('js_dependencies', tuple),
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('css_dependencies', tuple))
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class Plugin():
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default_on = False
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name = 'Default plugin'
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description = 'Default plugin description'
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class PluginStore():
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def __init__(self):
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self.plugins = []
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def __iter__(self):
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for plugin in self.plugins:
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yield plugin
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def register(self, *plugins, external=False):
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if external:
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plugins = load_external_plugins(plugins)
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for plugin in plugins:
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for plugin_attr, plugin_attr_type in required_attrs:
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if not hasattr(plugin, plugin_attr) or not isinstance(getattr(plugin, plugin_attr), plugin_attr_type):
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logger.critical('missing attribute "{0}", cannot load plugin: {1}'.format(plugin_attr, plugin))
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exit(3)
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for plugin_attr, plugin_attr_type in optional_attrs:
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if not hasattr(plugin, plugin_attr) or not isinstance(getattr(plugin, plugin_attr), plugin_attr_type):
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setattr(plugin, plugin_attr, plugin_attr_type())
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plugin.id = plugin.name.replace(' ', '_')
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self.plugins.append(plugin)
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def call(self, ordered_plugin_list, plugin_type, request, *args, **kwargs):
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ret = True
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for plugin in ordered_plugin_list:
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if hasattr(plugin, plugin_type):
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ret = getattr(plugin, plugin_type)(request, *args, **kwargs)
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if not ret:
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break
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return ret
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def load_external_plugins(plugin_names):
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plugins = []
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for name in plugin_names:
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logger.debug('loading plugin: {0}'.format(name))
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try:
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pkg = import_module(name)
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except Exception as e:
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logger.critical('failed to load plugin module {0}: {1}'.format(name, e))
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exit(3)
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pkg.__base_path = dirname(abspath(pkg.__file__))
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fix_package_resources(pkg, name)
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plugins.append(pkg)
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logger.debug('plugin "{0}" loaded'.format(name))
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return plugins
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def check_resource(base_path, resource_path, name, dir_prefix):
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dep_path = join(base_path, resource_path)
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file_name = basename(dep_path)
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resource_name = '{0}_{1}'.format('_'.join(name.split()), file_name)
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resource_path = join(static_path, 'plugins', dir_prefix, resource_name)
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if not exists(resource_path) or sha_sum(dep_path) != sha_sum(resource_path):
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try:
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copyfile(dep_path, resource_path)
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except:
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logger.critical('failed to copy plugin resource {0} for plugin {1}'.format(resource_name, name))
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exit(3)
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# returning with the web path of the resource
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return join('plugins', dir_prefix, resource_name)
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def fix_package_resources(pkg, name):
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if hasattr(pkg, 'js_dependencies'):
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pkg.js_dependencies = tuple([
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check_resource(pkg.__base_path, x, name, 'js')
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for x in pkg.js_dependencies
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])
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if hasattr(pkg, 'css_dependencies'):
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pkg.css_dependencies = tuple([
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check_resource(pkg.__base_path, x, name, 'css')
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for x in pkg.css_dependencies
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])
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def sha_sum(filename):
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with open(filename, "rb") as f:
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bytes = f.read()
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return sha256(bytes).hexdigest()
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plugins = PluginStore()
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plugins.register(oa_doi_rewrite)
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plugins.register(https_rewrite)
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plugins.register(infinite_scroll)
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plugins.register(open_results_on_new_tab)
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plugins.register(self_info)
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plugins.register(search_on_category_select)
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plugins.register(tracker_url_remover)
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plugins.register(vim_hotkeys)
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# load external plugins
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if 'plugins' in settings:
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plugins.register(*settings['plugins'], external=True)
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