Application exit (ReferenceError: SharedArrayBuffer is not defined)

[CKurdu]

Hello everybody,

My webassembly based Qt app works expected from Qt Creator but When I deployed the to my http server, it gave me the below error.

Settings are

Qt 6.5.2(multi-threadd)
emscripten version : 3.1.25
Development Machine OS: Windows 11

Application exit (ReferenceError: SharedArrayBuffer is not defined)

I think the problem is related to web worker or threads. Some security problems. Not sure.

from the developer console, it gave this output.

ReferenceError: SharedArrayBuffer is not defined
    at eval (eval at completeLoadEmscriptenModule (qtloader.js:461:9), <anonymous>:9:8417)
    at completeLoadEmscriptenModule (qtloader.js:462:9)
    at qtloader.js:345:13

When I compile the same project with a single thread, it works as expected from an HTTP server.
Kind Regards

[JasonWong]

You need to modify the http header. If you are using nginx deployment, you need to modify the conf file.

This header needs to be modified：

add_header 'Cross-Origin-Embedder-Policy' 'require-corp';
add_header 'Cross-Origin-Opener-Policy' 'same-origin';