The same question is asked on StackOverflow as well but not got any response yet.

https://stackoverflow.com/questions/47898135/can-play-framework-2-6-x-handle-square-brackets-in-url

Use Play Framework 2.6.9 with akka-http by default. When url contains '[' or ']', HTTP client will receive message:

Illegal request-target: Invalid input ']', expected pchar, '/', '?' or 'EOI' (line 1, column 32)

It seems akka-http intercepts the request and returns directly, while Play Framework has no chance to have custom error handler to return custom response.

Is there any way to have custom response for it?