Tile cache doesn't work if the URLs vary

[Danstahr]

Currently, the Tile Cache is based on the URL of the image inside. This doesn't work well for cases where the URL can vary, for example if there are multiple instances of the server and the URLs are distributed randomly between them (like s1.maps.example.com and s2.maps.example.com).

This can be handled in the Factory Info (so that it always returns something like (x + y) % number_of_servers), but I think the cache shouldn't rely on uniqueness of the URLs and instead should be based on the X, Y, zoom and mapId fields.

[msteiger]

Yeah, the whole solution in general is not ideal for this scenario. I'll have to think a bit more on that, but it'll probably be a regex to match the server URL.

A proper solution would be to activate the caching only for those few connections that load tiles. If you're up for implementing that, let me know (PR).

[msteiger]

Yay! Took me only 3,5 years to fix this issue.