CORS issue with Thingworx and REST calls

[drieder]

Hello everyone,

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.

best Regards,
Dominik

[ckaminski]

Hello, Dominik:

   Is it possible you can share the fragment you added to the web.xml?

Regards,

-Chris Kaminski

[drieder]

Hello @ckaminski ,

please excuse my late reply. Attached you can find the web.xml file.

Best Regards,

Dominik

[ckaminski]

Hello,

  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? 

Regards,

-Chris

[ckaminski]

Hello, Dominik:

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