redis.Redis.from_url(url) doesn't check if the url is valid
Before this commit: actual error are detected later when the client is actually used.
With this commit, client() makes sure to return a valid Redis client or None.
Also, the code makes sure not to log the password of the Redis URL
settings.yml:
* The default URL was unix:///usr/local/searxng-redis/run/redis.sock?db=0
* The default URL is now "false"
The default URL makes the log difficult to deal with:
if the admin didn't install a Redis instance, the logs record a false error.
It worked before because SearXNG initialized the Redis connection when the limiter started.
In this commit, SearXNG initializes Redis in searx/webapp.py
so various components can use Redis without taking care of the initialization step.
There is an issue with redis v4.1.0 [1] / for the interim lets remove this
python dependency.
[1] https://github.com/searxng/searxng/issues/741
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
Add a redis connector, the default DB connector is a socket at::
unix:///usr/local/searxng-redis/run/redis.sock?db=0
To set up a redis instance simply use::
$ ./manage redis.build
$ sudo -H ./manage redis.install
A hint for developers:
To get access rights to this instance, your developer account needs to be added
to the *searxng-redis* group::
$ sudo -H ./manage redis.addgrp "${USER}"
# don't forget to logout & login to get member of group
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
