The EngineCache class replaces all previously individual solutions for caches in
the context of the engines.
- demo_offline.py
- duckduckgo.py
- radio_browser.py
- soundcloud.py
- startpage.py
- wolframalpha_api.py
- wolframalpha_noapi.py
Search term to test most of the modified engines::
!ddg !rb !sc !sp !wa test
!ddg !rb !sc !sp !wa foo
For introspection of the DB, jump into developer environment and run command to
show cache state::
$ ./manage pyenv.cmd bash --norc --noprofile
(py3) python -m searx.enginelib cache state
cache tables and key/values
===========================
[demo_offline ] 2025-04-22 11:32:50 count --> (int) 4
[startpage ] 2025-04-22 12:32:30 SC_CODE --> (str) fSOBnhEMlDfE20
[duckduckgo ] 2025-04-22 12:32:31 4dff493e.... --> (str) 4-128634958369380006627592672385352473325
[duckduckgo ] 2025-04-22 12:40:06 3e2583e2.... --> (str) 4-263126175288871260472289814259666848451
[radio_browser ] 2025-04-23 11:33:08 servers --> (list) ['https://de2.api.radio-browser.info', ...]
[soundcloud ] 2025-04-29 11:40:06 guest_client_id --> (str) EjkRJG0BLNEZquRiPZYdNtJdyGtTuHdp
[wolframalpha ] 2025-04-22 12:40:06 code --> (str) 5aa79f86205ad26188e0e26e28fb7ae7
number of tables: 6
number of key/value pairs: 7
In the "cache tables and key/values" section, the table name (engine name) is at
first position on the second there is the calculated expire date and on the
third and fourth position the key/value is shown.
About duckduckgo: The *vqd coode* of ddg depends on the query term and therefore
the key is a hash value of the query term (to not to store the raw query term).
In the "properties of ENGINES_CACHE" section all properties of the SQLiteAppl /
ExpireCache and their last modification date are shown::
properties of ENGINES_CACHE
===========================
[last modified: 2025-04-22 11:32:27] DB_SCHEMA : 1
[last modified: 2025-04-22 11:32:27] LAST_MAINTENANCE :
[last modified: 2025-04-22 11:32:27] crypt_hash : ca612e3566fdfd7cf7efe2b1c9349f461158d07cb78a3750e5c5be686aa8ebdc
[last modified: 2025-04-22 11:32:30] CACHE-TABLE--demo_offline: demo_offline
[last modified: 2025-04-22 11:32:30] CACHE-TABLE--startpage: startpage
[last modified: 2025-04-22 11:32:31] CACHE-TABLE--duckduckgo: duckduckgo
[last modified: 2025-04-22 11:33:08] CACHE-TABLE--radio_browser: radio_browser
[last modified: 2025-04-22 11:40:06] CACHE-TABLE--soundcloud: soundcloud
[last modified: 2025-04-22 11:40:06] CACHE-TABLE--wolframalpha: wolframalpha
These properties provide information about the state of the ExpireCache and
control the behavior. For example, the maintenance intervals are controlled by
the last modification date of the LAST_MAINTENANCE property and the hash value
of the password can be used to detect whether the password has been changed (in
this case the DB entries can no longer be decrypted and the entire cache must be
discarded).
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
A local development server can be launched by one of these command lines::
$ flask --app searx.webapp run
$ python -m searx.webapp
The different ways of starting the server should lead to the same result, which
is generally the case. However, if the modules are reloaded after code
changes (reload option), it must be avoided that the application is initialized
twice at startup. We have already discussed this in 2022 [1][2].
Further information on this topic can be found in [3][4][5].
To test a bash in the ./local environment was started and the follwing commands
had been executed::
$ ./manage pyenv.cmd bash --norc --noprofile
(py3) SEARXNG_DEBUG=1 flask --app searx.webapp run --reload
(py3) SEARXNG_DEBUG=1 python -m searx.webapp
Since the generic parts of the docs also initialize the app to generate doc from
it, the build of the docs was also tested::
$ make docs.clean docs.live
[1] https://github.com/searxng/searxng/pull/1656#issuecomment-1214198941
[2] https://github.com/searxng/searxng/pull/1616#issuecomment-1206137468
[3] https://flask.palletsprojects.com/en/stable/api/#flask.Flask.run
[4] https://github.com/pallets/flask/issues/5307#issuecomment-1774646119
[5] https://stackoverflow.com/a/25504196
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
BTW: fix a bug with sys.path: repo-root (not util) needs to added to generate
autodoc from scripts in ./searxng_extra
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
Do a DNS-lookup of 'all.api.radio-browser.info', add reverse lookup and select
randomly a URL from available servers
Closes: https://github.com/searxng/searxng/issues/4576
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
On a long-running server, the tracebacks below can be found (albeit rarely),
which indicate problems with NoneType where a string or another data type is
expected.
result.img_src::
File "/usr/local/searxng/searxng-src/searx/templates/simple/result_templates/images.html", line 13, in top-level template code
<img src="" data-src="{{ image_proxify(result.img_src) }}" alt="{{ result.title|striptags }}">{{- "" -}}
^
File "/usr/local/searxng/searxng-src/searx/webapp.py", line 284, in image_proxify
if url.startswith('//'):
^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'startswith'
result.content::
File "/usr/local/searxng/searxng-src/searx/result_types/_base.py", line 105, in _normalize_text_fields
result.content = WHITESPACE_REGEX.sub(" ", result.content).strip()
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
TypeError: expected string or bytes-like object, got 'NoneType'
html_to_text, when html_str is a NoneType::
File "/usr/local/searxng/searxng-src/searx/engines/wikipedia.py", line 190, in response
title = utils.html_to_text(api_result.get('titles', {}).get('display') or api_result.get('title'))
File "/usr/local/searxng/searxng-src/searx/utils.py", line 158, in html_to_text
html_str = html_str.replace('\n', ' ').replace('\r', ' ')
^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'replace'
presearch engine, when json_resp is a NoneType::
File "/usr/local/searxng/searxng-src/searx/engines/presearch.py", line 221, in response
results = parse_search_query(json_resp.get('results'))
File "/usr/local/searxng/searxng-src/searx/engines/presearch.py", line 161, in parse_search_query
for item in json_results.get('specialSections', {}).get('topStoriesCompact', {}).get('data', []):
^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'get'
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This patch brings two major changes:
- ``Result.filter_urls(..)`` to pass a filter function for URL fields
- The ``enabled_plugins:`` section in SearXNG's settings do no longer exists.
To understand plugin development compile documentation:
$ make docs.clean docs.live
and read http://0.0.0.0:8000/dev/plugins/development.html
There is no longer a distinction between built-in and external plugin, all
plugins are registered via the settings in the ``plugins:`` section.
In SearXNG, plugins can be registered via a fully qualified class name. A
configuration (`PluginCfg`) can be transferred to the plugin, e.g. to activate
it by default / *opt-in* or *opt-out* from user's point of view.
built-in plugins
================
The built-in plugins are all located in the namespace `searx.plugins`.
.. code:: yaml
plugins:
searx.plugins.calculator.SXNGPlugin:
active: true
searx.plugins.hash_plugin.SXNGPlugin:
active: true
searx.plugins.self_info.SXNGPlugin:
active: true
searx.plugins.tracker_url_remover.SXNGPlugin:
active: true
searx.plugins.unit_converter.SXNGPlugin:
active: true
searx.plugins.ahmia_filter.SXNGPlugin:
active: true
searx.plugins.hostnames.SXNGPlugin:
active: true
searx.plugins.oa_doi_rewrite.SXNGPlugin:
active: false
searx.plugins.tor_check.SXNGPlugin:
active: false
external plugins
================
SearXNG supports *external plugins* / there is no need to install one, SearXNG
runs out of the box.
- Only show green hosted results: https://github.com/return42/tgwf-searx-plugins/
To get a developer installation in a SearXNG developer environment:
.. code:: sh
$ git clone git@github.com:return42/tgwf-searx-plugins.git
$ ./manage pyenv.cmd python -m \
pip install -e tgwf-searx-plugins
To register the plugin in SearXNG add ``only_show_green_results.SXNGPlugin`` to
the ``plugins:``:
.. code:: yaml
plugins:
# ...
only_show_green_results.SXNGPlugin:
active: false
Result.filter_urls(..)
======================
The ``Result.filter_urls(..)`` can be used to filter and/or modify URL fields.
In the following example, the filter function ``my_url_filter``:
.. code:: python
def my_url_filter(result, field_name, url_src) -> bool | str:
if "google" in url_src:
return False # remove URL field from result
if "facebook" in url_src:
new_url = url_src.replace("facebook", "fb-dummy")
return new_url # return modified URL
return True # leave URL in field unchanged
is applied to all URL fields in the :py:obj:`Plugin.on_result` hook:
.. code:: python
class MyUrlFilter(Plugin):
...
def on_result(self, request, search, result) -> bool:
result.filter_urls(my_url_filter)
return True
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
