Subject: Re: bug#49033: 28.0.50; [PATCH] Feature suggestion, url-cache-expiry-alist to override expire time for cache pruning

From: Alex Bochannek <[email-masked]>
Date: Sat, 19 Jun 2021 12:32:13 -0700

Lars Ingebrigtsen <[email-masked]> writes:

> Alex Bochannek <[email-masked]> writes:
>
>> Support URL-specific cache expiration
>>
>> 	* test/lisp/url/url-cache-tests.el: Test URL-to-filename and
>> 	filename-to-URL mappings used by URL caching.
>>
>> 	* lisp/url/url-cache.el (url-cache-expiry-alist)
>> 	(url-cache-create-url-from-file, url-cache-expired)
>> 	(url-cache-prune-cache): Expire cache entries based on regular
>> 	expressions matching URLs defined in new customizable variable
>> 	url-cache-expire-alist.
>>
>> 	* doc/misc/url.texi (Disk Caching): Mention
>> 	url-cache-expiry-alist variable.
>
> Looks good to me.  What's the use case for this, though?

I originally had looked at this for Gravatar entries and I am now using
it to avoid fetching the same images in RSS feeds. I just noticed though
that `url-cache-create-url-from-file' won't work if
`url-cache-create-filename-human-readable' is used. Any suggestions for
how to address that?

-- 
Alex.