eBay API CORS request using JavaScript returns undefined

Question

I want to fetch JSON data from eBay Sandbox using JavaScript

I tried getting it through CORS request (as it is a cross domain request) but it returns undefined. I tried lots of different code but I haven't found any solutions. What I want to do is that fetch the products from eBay and display them in my Chrome extension.

Any help is appreciated.

Answer 1

I found a solution by making a CORS request and using the CORS Anywhere API from https://github.com/Rob--W/cors-anywhere/

var cors_api_url = 'https://cors-anywhere.herokuapp.com/';
function doCORSRequest(options, printResult) {
    var x = new XMLHttpRequest();
    x.open(options.method, cors_api_url + options.url);
    x.onload = x.onerror = function() {
        printResult(
            options.method + ' ' + options.url + '\n' +
            x.status + ' ' + x.statusText + '\n\n' +
            (x.responseText || '')
        );
    };
    x.send(options.data);
}
(function() {
    var outputField = document.getElementById('output');
    new1();
    function new1() {
        // e.preventDefault();
        doCORSRequest({
            method: 'GET',
            url: url,
        }, function printResult(result) {
            //result contains the response
            //write your code here
        });
    };
})();

Source: https://github.com/Rob--W/cors-anywhere/blob/master/demo.html

(Live example: https://robwu.nl/cors-anywhere.html)