6 examples of 'jquery ajax set header access control allow origin' in JavaScript

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function setHeader(xhr, headers) {
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    //"Content-Type":"application/x-www-form-urlencoded"
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    for(var iter in headers) {
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        xhr.setRequestHeader(iter, headers[iter]);
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    }
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}

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function isCORSRequest(sUrl) {
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	var sHost = new URI(sUrl).host();
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	// url is relative or with same host
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	return sHost && sHost !== HOST;
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}

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configureXHR(xhr: XHR): void {
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  for (let name in this.headers) {
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    if (this.headers.hasOwnProperty(name)) {
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      xhr.setRequestHeader(this.headers[name].key, this.headers[name].value);
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    }
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  }
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}

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function test_response_header(allow) {
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    var resp_test = async_test('Access-Control-Allow-Credentials: ' + allow + ' should be disallowed (async)')
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    resp_test.step(function() {
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        var client = new XMLHttpRequest()
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        client.open('GET',
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            CROSSDOMAIN + 'resources/cors-makeheader.py?credentials=' + allow,
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            true)
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        client.withCredentials = true;
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        client.onload = resp_test.step_func(function() {
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            assert_unreached("onload")
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        })
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        client.onerror = resp_test.step_func(function () {
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            assert_equals(client.readyState, client.DONE, 'readyState')
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            resp_test.done()
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        })
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        client.send()
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    })
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}

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function xhrSetRequestHeader(xhr, options) {
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  xhr.setRequestHeader("Accepts", acceptsHeader(options));
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}

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function makeCorsRequest() {
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  // This is a sample server that supports CORS.
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  var url = 'http://localhost:8080/api/v1/user/auth_session';
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  var xhr = createCORSRequest('GET', url);
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  if (!xhr) {
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    alert('CORS not supported');
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    return;
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  }
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  // Response handlers.
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  xhr.onload = function() {
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    var text = xhr.responseText;
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    var title = getTitle(text);
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    alert('Response from CORS request to ' + url + ': ' + title);
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  };
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  xhr.onerror = function() {
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    alert('Woops, there was an error making the request.');
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  };
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  xhr.send();
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}