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Backport #27446 by @sryze
storageHandler() is written as a middleware but is used as an endpoint
handler, and thus `next` is actually `nil`, which causes a null pointer
dereference when a request URL does not match the pattern (where it
calls `next.ServerHTTP()`).
Example CURL command to trigger the panic:
```
curl -I "http://yourhost/gitea//avatars/a"
```
Fixes #27409
---
Note: the diff looks big but it's actually a small change - all I did
was to remove the outer closure (and one level of indentation) ~and
removed the HTTP method and pattern checks as they seem redundant
because go-chi already does those checks~. You might want to check "Hide
whitespace" when reviewing it.
Alternative solution (a bit simpler): append `, misc.DummyOK` to the
route declarations that utilize `storageHandler()` - this makes it
return an empty response when the URL is invalid. I've tested this one
and it works too. Or maybe it would be better to return a 400 error in
that case (?)
Co-authored-by: Sergey Zolotarev <sryze@outlook.com>
(cherry picked from commit
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| admin | ||
| auth | ||
| devtest | ||
| events | ||
| explore | ||
| feed | ||
| healthcheck | ||
| misc | ||
| org | ||
| repo | ||
| shared | ||
| user | ||
| auth.go | ||
| auth_windows.go | ||
| base.go | ||
| goget.go | ||
| home.go | ||
| metrics.go | ||
| nodeinfo.go | ||
| swagger_json.go | ||
| web.go | ||
| webfinger.go | ||