Anecdotally, using SearX over unreliable proxies,
like tor, seems to be quite error prone.
SearX puts quite an effort to measure the
performance and reliability of engines, most
likely owning to those aspects being of
significant concern.
The patch here proposes to mitigate related
problems, by issuing concurrent redundant requests
through the specified proxies at once, returning
the first response that is not an error.
The functionality is enabled using the:
`proxy_request_redundancy` parameter within the
outgoing network settings or the engine settings.
Example:
```yaml
outgoing:
request_timeout: 8.0
proxies:
"all://":
- socks5h://tor:9050
- socks5h://tor1:9050
- socks5h://tor2:9050
- socks5h://tor3:9050
proxy_request_redundancy: 4
```
In this example, each network request will be
send 4 times, once through every proxy. The
first (non-error) response wins.
In my testing environment using several tor proxy
end-points, this approach almost entirely
removes engine errors related to timeouts
and denied requests. The latency of the
network system is also improved.
The implementation, uses a
`AsyncParallelTransport(httpx.AsyncBaseTransport)`
wrapper to wrap multiple sub-trasports,
and `asyncio.wait` to wait on the first completed
request.
The existing implementation of the network
proxy cycling has also been moved into the
`AsyncParallelTransport` class, which should
improve network client memoization and
performance.
TESTED:
- unit tests for the new functions and classes.
- tested on desktop PC with 10+ upstream proxies
and comparable request redundancy.
- torznab engine using types and clearer code
- torznab option to hide torrent and magnet links.
- document the torznab engine
- add myself to authors
Closes: https://github.com/searxng/searxng/issues/1124
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
Adds to the navigation widget, preserving forward/backward nav, and
inserting a list of clickable page numbers between them.
Phone sized devices continue without this widget as deterministic
display under small screen sizes has not been solved.
The widget is agnostic to the actual amount of pages there are that one
can navigate to and as such shows all plausible, albeit not necessarilly
valid, possibilities.
This widget does not interfere with infinite scroll in any fashion.
Some administrators may want to hide the link to public_instances: If you run a
private instance for a company that wants there employees to use the private
instance instead of any of the public instances.
* Made first attempt at the bangs redirects plugin.
* It redirects. But in a messy way via javascript.
* First version with custom plugin
* Added a help page and a operator to see all the bangs available.
* Changed to .format because of support
* Changed to .format because of support
* Removed : in params
* Fixed path to json file and changed bang operator
* Changed bang operator back to &
* Made first attempt at the bangs redirects plugin.
* It redirects. But in a messy way via javascript.
* First version with custom plugin
* Added a help page and a operator to see all the bangs available.
* Changed to .format because of support
* Changed to .format because of support
* Removed : in params
* Fixed path to json file and changed bang operator
* Changed bang operator back to &
* Refactored getting search query. Also changed bang operator to ! and is now working.
* Removed prints
* Removed temporary bangs_redirect.js file. Updated plugin documentation
* Added unit test for the bangs plugin
* Fixed a unit test and added 2 more for bangs plugin
* Changed back to default settings.yml
* Added myself to AUTHORS.rst
* Refacored working of custom plugin.
* Refactored _get_bangs_data from list to dict to improve search speed.
* Decoupled bangs plugin from webserver with redirect_url
* Refactored bangs unit tests
* Fixed unit test bangs. Removed dubbel parsing in bangs.py
* Removed a dumb print statement
* Refactored bangs plugin to core engine.
* Removed bangs plugin.
* Refactored external bangs unit tests from plugin to core.
* Removed custom_results/bangs documentation from plugins.rst
* Added newline in settings.yml so the PR stays clean.
* Changed searx/plugins/__init__.py back to the old file
* Removed newline search.py
* Refactored get_external_bang_operator from utils to external_bang.py
* Removed unnecessary import form test_plugins.py
* Removed _parseExternalBang and _isExternalBang from query.py
* Removed get_external_bang_operator since it was not necessary
* Simplified external_bang.py
* Simplified external_bang.py
* Moved external_bangs unit tests to test_webapp.py. Fixed return in search with external_bang
* Refactored query parsing to unicode to support python2
* Refactored query parsing to unicode to support python2
* Refactored bangs plugin to core engine.
* Refactored search parameter to search_query in external_bang.py
