No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘…’ is therefore not allowed access

by

Use addHeader Instead of using setHeader method,

response.addHeader("Access-Control-Allow-Origin", "*");

* in above line will allow access to all domains.

For allowing access to specific domain only:

response.addHeader("Access-Control-Allow-Origin", "http://www.example.com");

Check this blog post.

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