I am facing the famous CORS issue when making post calls from my java script to the Thingworx Server. To be specific, this is the error message: "...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 tried to add the CORS filter to the tomcat web.xml as described in this thread and I am still facing this problem. I am using the Trial-Version for Thingworx by the way.
Any ideas what could be the reason?
Any help is appreciated very much.
Is it possible you can share the fragment you added to the web.xml?
You can message it to me privately if you wish.
Regards, -Chris Kaminski
Sorry for the delay. I assume you are not running Both CORS filter sections in the web.xml?
Are you able to confirm the CORS header is not being sent with a tool like Postman or CURL?