Issue Plesk NodeJS Server: CORS error upon every request

[keithchasen]

Hi
I have node api and two next app connected to it. A couple of days ago customers claimed they can't login and turned out there's a cors error in the console.

Access to XMLHttpRequest at '{node api}' from origin '{next app}' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Access to XMLHttpRequest at ''{node api}'/auth/me' from origin '{next app}' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

I have express cors middleware set up on my api and it is working fine locally. Basically it worked ok for last two months since I deployed these apps.

I tried all the ways to add cors in plesk i managed to find including https://support.plesk.com/hc/en-us/articles/12377597400087

but still no luck

Can anyone help with that?

 

[keithchasen]

Did someone experience same issue?
I also created fresh instance of node api and cors error appeared immediately.
setting headers like it described here https://support.plesk.com/hc/en-us/articles/12377597400087 didn't help.

 

[Peter Debik]

Why is CORS needed in the first place? Where is your application getting input from that this is required?

 

[keithchasen]

Why is CORS needed in the first place? Where is your application getting input from that this is required?

Hello

There's a node api and two NEXT js apps which make requests to it
node api uses express cors middleware like so

app.use(cors());
All of a sudden we started seeing cors errors in the console on each request however no changes were neither in code nor in plesk settings recently.

 

[keithchasen]

Hello
Ok, so we had temporary domain for node api and tried adding domain name we own. we added that on august 7 and that helped but today we're again seeing CORS error. Can someone help figure out that weird behaviour?