Failed Cross-Origin Request Sharing in AngularJS 1.4

I'm currently working with AngularJS version 1.4.3 and here is the code snippet I am using:

angular
    .module('app', [])
    .run(run);

function run($http) {

      a = $http({
          method: "GET",
          url: 'http://127.0.0.1:8080/test',
          data: {}
      });

      console.log(a);
}

When accessing the URL through a browser or Postman, it works fine. However, I encounter the following error message when executing the provided code:

XMLHttpRequest cannot load . No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8000' is therefore not allowed access.

Interestingly, I am able to retrieve the desired result when using applications, but the code fails to do so. What could be causing this discrepancy?

Answer №1

The main idea here is that I am able to retrieve the result using applications through the GET method.

In this scenario, there are only two entities at play - the application and the server. No other parties are involved.

However, attempting to use code for this purpose will not yield the desired outcome.

When dealing with two different websites (localhost:8000 and localhost:8080), the browser faces a dilemma as it cannot determine whether the JavaScript from 8000 can be trusted with the data that 8080 intends to provide to the user.

What mistake have I made?

Your error lies in failing to include an Access-Control-Allow-Origin header in the HTTP response sent from 8080. This omission prevents the browser from recognizing that 8000 is authorized to access the data.

For further information, refer to:

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