CODEWITHSUNDEEP
javascriptajaxcors
JF0001
JF0001

Reputation: 839

CORS AJAX Call not Successful

I have an AJAX call trying to execute the following CORS request to a Web Server (I am currently testing using only the latest version of Chrome):

var xhr = new XMLHttpRequest();
xhr.open("get", "http://www.web_server_url.com/query", true);
xhr.onload = function(){
};
xhr.send(null);

Meanwhile, I am still getting the following message:

XMLHttpRequest cannot load http://www.web_server_url.com/query. Origin http://localhost is not allowed by Access-Control-Allow-Origin.

Would someone know what I am missing?

Upvotes: 0

Views: 420

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1074295

The reason is exactly what it says in the error: The server at www.web_server_url.com is not allowing the localhost origin. It's up to the server to decide whether to allow the origin of the call. In this case, apparently it's not allowing it.

The way CORS works, the server replies to the request (or a "preflight" request) with headers either allowing or disallowing the origin on the basis of the information the browser sends it.

Upvotes: 1

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