JavaScript Client to Test CORS
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Internal
Example
<!DOCTYPE html>
<html>
<head>
<script>
var stageUrl = 'https://0o2dx0vi59.execute-api.us-west-2.amazonaws.com/test';
function invokeOptions() {
invoke('OPTIONS');
}
function invokeGet() {
invoke('GET');
}
function invoke(method) {
var url = stageUrl + '/a';
var xhr = createCORSRequest(method, url);
xhr.withCredentials = false;
xhr.onload = function() {
document.getElementById("result").innerHTML = "SUCCESS";
};
xhr.onerror = function() {
document.getElementById("result").innerHTML = "ERROR";
};
xhr.send();
}
var createCORSRequest = function(method, url) {
var xhr = new XMLHttpRequest();
if ("withCredentials" in xhr) {
xhr.open(method, url, true);
}
else {
// CORS not supported.
xhr = null;
}
return xhr;
};
</script>
</head>
<body>
<h1>CORS TEST</h1>
<button type="button" onclick="invokeOptions()">Invoke OPTIONS</button>
<br>
<br>
<button type="button" onclick="invokeGet()">Invoke GET</button>
<p id="result"></p>
</body>
</html>