mirror of https://github.com/searx/searx
266 lines
10 KiB
ReStructuredText
266 lines
10 KiB
ReStructuredText
|
|
.. _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
|
|
========================= =====================================================
|