Make tiles URL handle double slashes /tiles//12/2146/1390.mvt

[felixguendling]

No description provided.

[Lucas-C]

Tested with a fresh build based on commit 860da4d
and it seems to work fine when I query http://localhost:1280/tiles//15/16597/11273.mvt locally:
the file can be downloaded correctly.

[felixguendling]

@jbruechert can you check? I just took your comment on Matrix and made an issue out of it. The problem a few days ago was that the Nginx proxy added a slash somewhere and somehow the tiles didn't reach the frontend.

If there's no problem - even better. Thank you @Lucas-C for checking!

[jbruechert]

I think the problem is that it does still returns a syntactically correct tile, just often without anything useful in it.

I then occasionally see things like this in the log:

Jan 17 22:41:13 crunchy motis[520788]: 2025-01-17T21:41:13Z [VERIFY FAIL] invalid zoom level 900625640

The broken nginx config is

    location /tiles {
        proxy_pass http://localhost:8080/tiles/;
    }

A slash after /tiles fixes it, preventing the double slash from being passed on:

    location /tiles/ {
        proxy_pass http://crunchy:8080/tiles/;
    }