.. _engines-dev: =============== Engine overview =============== .. _metasearch-engine: https://en.wikipedia.org/wiki/Metasearch_engine searx is a metasearch-engine_, so it uses different search engines to provide better results. Because there is no general search API which could be used for every search engine, an adapter has to be built between searx and the external search engines. Adapters are stored under the folder :origin:`searx/engines`. .. contents:: :depth: 3 :backlinks: entry general engine configuration ============================ It is required to tell searx the type of results the engine provides. The arguments can be set in the engine file or in the settings file (normally ``settings.yml``). The arguments in the settings file override the ones in the engine file. It does not matter if an option is stored in the engine file or in the settings. However, the standard way is the following: engine file ----------- ======================= =========== =========================================== argument type information ======================= =========== =========================================== categories list pages, in which the engine is working paging boolean support multible pages language_support boolean support language choosing time_range_support boolean support search time range offline boolean engine runs offline ======================= =========== =========================================== settings.yml ------------ ======================= =========== =========================================== argument type information ======================= =========== =========================================== name string name of search-engine engine string name of searx-engine (filename without ``.py``) shortcut string shortcut of search-engine timeout string specific timeout for search-engine ======================= =========== =========================================== overrides --------- A few of the options have default values in the engine, but are often overwritten by the settings. If ``None`` is assigned to an option in the engine file, it has to be redefined in the settings, otherwise searx will not start with that engine. The naming of overrides is arbitrary. But the recommended overrides are the following: ======================= =========== =========================================== argument type information ======================= =========== =========================================== base_url string base-url, can be overwritten to use same engine on other URL number_of_results int maximum number of results per request language string ISO code of language and country like en_US api_key string api-key if required by engine ======================= =========== =========================================== example code ------------ .. code:: python # engine dependent config categories = ['general'] paging = True language_support = True making a request ================ To perform a search an URL have to be specified. In addition to specifying an URL, arguments can be passed to the query. passed arguments ---------------- These arguments can be used to construct the search query. Furthermore, parameters with default value can be redefined for special purposes. ====================== ============ ======================================================================== argument type default-value, information ====================== ============ ======================================================================== url string ``''`` method string ``'GET'`` headers set ``{}`` data set ``{}`` cookies set ``{}`` verify boolean ``True`` headers.User-Agent string a random User-Agent category string current category, like ``'general'`` started datetime current date-time pageno int current pagenumber language string specific language code like ``'en_US'``, or ``'all'`` if unspecified ====================== ============ ======================================================================== parsed arguments ---------------- The function ``def request(query, params):`` always returns the ``params`` variable. Inside searx, the following paramters can be used to specify a search request: ============ =========== ========================================================= argument type information ============ =========== ========================================================= url string requested url method string HTTP request method headers set HTTP header information data set HTTP data information (parsed if ``method != 'GET'``) cookies set HTTP cookies verify boolean Performing SSL-Validity check ============ =========== ========================================================= example code ------------ .. code:: python # search-url base_url = 'https://example.com/' search_string = 'search?{query}&page={page}' # do search-request def request(query, params): search_path = search_string.format( query=urlencode({'q': query}), page=params['pageno']) params['url'] = base_url + search_path return params returned results ================ Searx is able to return results of different media-types. Currently the following media-types are supported: - default_ - images_ - videos_ - torrent_ - map_ To set another media-type as default, the parameter ``template`` must be set to the desired type. default ------- ========================= ===================================================== result-parameter information ========================= ===================================================== url string, url of the result title string, title of the result content string, general result-text publishedDate :py:class:`datetime.datetime`, time of publish ========================= ===================================================== images ------ To use this template, the parameter: ========================= ===================================================== result-parameter information ========================= ===================================================== template is set to ``images.html`` url string, url to the result site title string, title of the result *(partly implemented)* content *(partly implemented)* publishedDate :py:class:`datetime.datetime`, time of publish *(partly implemented)* img\_src string, url to the result image thumbnail\_src string, url to a small-preview image ========================= ===================================================== videos ------ ========================= ===================================================== result-parameter information ========================= ===================================================== template is set to ``videos.html`` url string, url of the result title string, title of the result content *(not implemented yet)* publishedDate :py:class:`datetime.datetime`, time of publish thumbnail string, url to a small-preview image ========================= ===================================================== torrent ------- .. _magnetlink: https://en.wikipedia.org/wiki/Magnet_URI_scheme ========================= ===================================================== result-parameter information ========================= ===================================================== template is set to ``torrent.html`` url string, url of the result title string, title of the result content string, general result-text publishedDate :py:class:`datetime.datetime`, time of publish *(not implemented yet)* seed int, number of seeder leech int, number of leecher filesize int, size of file in bytes files int, number of files magnetlink string, magnetlink_ of the result torrentfile string, torrentfile of the result ========================= ===================================================== map --- ========================= ===================================================== result-parameter information ========================= ===================================================== url string, url of the result title string, title of the result content string, general result-text publishedDate :py:class:`datetime.datetime`, time of publish latitude latitude of result (in decimal format) longitude longitude of result (in decimal format) boundingbox boundingbox of result (array of 4. values ``[lat-min, lat-max, lon-min, lon-max]``) geojson geojson of result (http://geojson.org) osm.type type of osm-object (if OSM-Result) osm.id id of osm-object (if OSM-Result) address.name name of object address.road street name of object address.house_number house number of object address.locality city, place of object address.postcode postcode of object address.country country of object ========================= =====================================================