Request for non-existent image results in OK 200 and bootstrap page in V22

[anssit]

Description of the bug

While testing #10965 in V23, discovered that in the default (JavaScript) bootstrap mode, requesting a non-existent image results in OK 200 response code and the bootstrap index.html returned as a result.

Expected behavior

Error code 404, behaviour as described in #10965.

Minimal reproducible example

To reproduce, add an image to some view in the application. Set image's resource name to something that will not be found from static resources.

    Image image = new Image("not_found.jpeg", "alt");
    add(image);

Versions

Vaadin: 22.0.4
Flow: 9.0.4
Java: Oracle Corporation 16.0.1
OS: x86_64 Mac OS X 11.5
Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

[Artur-]

With 23 beta 1, I get

GET http://localhost:8080/not_found.jpeg 404

[anssit]

You are absolutely right. By mistake I tested this with V22 and assumed it is the same for V23. It is fixed for V23 in #12571. Changed the title accordingly.

[Artur-]

So it is fine to close this?

[anssit]

We decided in the team to cherry-pick #12571 to V22. We'll keep this issue open until the CP has been merged.

[anssit]

#12571 cherry picked in #12969, closing this issue.