local cache files need meta information

[Reimar Bauer]

Currently local cache files could only be identified by having the url which where used to create them.

If you alter your window size, the images cached are not used, new cache files become produced.

If you want to use the stored cache files, we could may be provide a feature to have the window size based on cache files. This also enables the option to store all created image cache files of all users on one place. This is interesting on regions with a slow internet bandwith.

We just could use same file name of cache files and add a new file with extension .meta and a json description.

e.g.

{
"url": complete url
"width": width
"height": height
"creation": datetime 
}

[Reimar Bauer]

At current state of caching, we don't have everything in the cached file, so this information is pointless