CORS header 'Access-Control-Allow-Origin' missing error

Question

I have tried to get json response from public salesforce API 'https://na1.salesforce.com/services/data/'. When I use HTTP/REST tool its working fine and return string as json. But when I am tring to call public API through jQuery AJAX request and giving following error:

"Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://na1.salesforce.com/services/data/. (Reason: CORS header 'Access-Control-Allow-Origin' missing)."

Please provide the solution how can I call API from simple HTML page using AJAX request.

Scott Covert · Answer

Hi Riyaz,

In Spring '15 Salesforce began offering CORS whitelisting. You can specify the domain that is serving your script as a trusted resource through the UI by following the instructions here: https://developer.salesforce.com/docs/atlas.en-us.chatterapi.meta/chatterapi/extend_code_cors.htm

Best,

Scott

CORS header 'Access-Control-Allow-Origin' missing error

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