diff options
Diffstat (limited to 'searx/plugins/__init__.py')
| -rw-r--r-- | searx/plugins/__init__.py | 97 |
1 files changed, 94 insertions, 3 deletions
diff --git a/searx/plugins/__init__.py b/searx/plugins/__init__.py index 4dbcbbd28..c701df640 100644 --- a/searx/plugins/__init__.py +++ b/searx/plugins/__init__.py @@ -14,8 +14,16 @@ along with searx. If not, see < http://www.gnu.org/licenses/ >. (C) 2015 by Adam Tauber, <asciimoo@gmail.com> ''' -from sys import exit, version_info -from searx import logger + +from hashlib import sha256 +from importlib import import_module +from os import listdir, makedirs, remove, stat, utime +from os.path import abspath, basename, dirname, exists, join +from shutil import copyfile +from sys import version_info +from traceback import print_exc + +from searx import logger, settings, static_path if version_info[0] == 3: unicode = str @@ -54,7 +62,9 @@ class PluginStore(): for plugin in self.plugins: yield plugin - def register(self, *plugins): + def register(self, *plugins, external=False): + if external: + plugins = load_external_plugins(plugins) for plugin in plugins: for plugin_attr, plugin_attr_type in required_attrs: if not hasattr(plugin, plugin_attr) or not isinstance(getattr(plugin, plugin_attr), plugin_attr_type): @@ -77,6 +87,84 @@ class PluginStore(): return ret +def load_external_plugins(plugin_names): + plugins = [] + for name in plugin_names: + logger.debug('loading plugin: {0}'.format(name)) + try: + pkg = import_module(name) + except Exception as e: + logger.critical('failed to load plugin module {0}: {1}'.format(name, e)) + exit(3) + + pkg.__base_path = dirname(abspath(pkg.__file__)) + + prepare_package_resources(pkg, name) + + plugins.append(pkg) + logger.debug('plugin "{0}" loaded'.format(name)) + return plugins + + +def sync_resource(base_path, resource_path, name, target_dir, plugin_dir): + dep_path = join(base_path, resource_path) + file_name = basename(dep_path) + resource_path = join(target_dir, file_name) + if not exists(resource_path) or sha_sum(dep_path) != sha_sum(resource_path): + try: + copyfile(dep_path, resource_path) + # copy atime_ns and mtime_ns, so the weak ETags (generated by + # the HTTP server) do not change + dep_stat = stat(dep_path) + utime(resource_path, ns=(dep_stat.st_atime_ns, dep_stat.st_mtime_ns)) + except: + logger.critical('failed to copy plugin resource {0} for plugin {1}'.format(file_name, name)) + exit(3) + + # returning with the web path of the resource + return join('plugins/external_plugins', plugin_dir, file_name) + + +def prepare_package_resources(pkg, name): + plugin_dir = 'plugin_' + name + target_dir = join(static_path, 'plugins/external_plugins', plugin_dir) + try: + makedirs(target_dir, exist_ok=True) + except: + logger.critical('failed to create resource directory {0} for plugin {1}'.format(target_dir, name)) + exit(3) + + resources = [] + + if hasattr(pkg, 'js_dependencies'): + resources.extend(map(basename, pkg.js_dependencies)) + pkg.js_dependencies = tuple([ + sync_resource(pkg.__base_path, x, name, target_dir, plugin_dir) + for x in pkg.js_dependencies + ]) + if hasattr(pkg, 'css_dependencies'): + resources.extend(map(basename, pkg.css_dependencies)) + pkg.css_dependencies = tuple([ + sync_resource(pkg.__base_path, x, name, target_dir, plugin_dir) + for x in pkg.css_dependencies + ]) + + for f in listdir(target_dir): + if basename(f) not in resources: + resource_path = join(target_dir, basename(f)) + try: + remove(resource_path) + except: + logger.critical('failed to remove unused resource file {0} for plugin {1}'.format(resource_path, name)) + exit(3) + + +def sha_sum(filename): + with open(filename, "rb") as f: + bytes = f.read() + return sha256(bytes).hexdigest() + + plugins = PluginStore() plugins.register(oa_doi_rewrite) plugins.register(https_rewrite) @@ -86,3 +174,6 @@ plugins.register(self_info) plugins.register(search_on_category_select) plugins.register(tracker_url_remover) plugins.register(vim_hotkeys) +# load external plugins +if 'plugins' in settings: + plugins.register(*settings['plugins'], external=True) |