No Access-Control-Allow-Origin header is present on the requested resource

Question

I want to access information from same domain but with different port number, To allow this I am adding Access-Control-Allow-Origin with the response header.

Answer 1

Solution:
Instead of using setHeader method I have used addHeader.

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");

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