gistfile1.js

var cachedAuth;

function getAuthQueryString() {
    if (cachedAuth) return cachedAuth;

    var qs = [
        'sentry_version=4',
        'sentry_client=raven-js/' + Raven.VERSION
    ];
    if (globalKey) {
        qs.push('sentry_key=' + globalKey);
    }

    cachedAuth = qs;
    return cachedAuth;
}

function makeRequest(data) {
    var imageRequest = function(data){
        var img = new Image(),
            qs = '?' + getAuthQueryString().join('&');
            src = globalServer + qs + '&sentry_data=' + encodeURIComponent(JSON.stringify(data));

        img.onload = function success() {
            triggerEvent('success', {
                data: data,
                src: src
            });
        };
        img.onerror = img.onabort = function failure() {
            triggerEvent('failure', {
                data: data,
                src: src
            });
        };
        img.src = src;
    };
    var xhrRequest = function(data){
        var xhr = new XMLHttpRequest(),
        src = globalServer,
        qs = getAuthQueryString();


        xhr.open('POST', src, true);
        xhr.setRequestHeader('X-Sentry-Auth', 'Sentry ' + qs.join(','));
        xhr.setRequestHeader('Content-type', 'application/json; charset=utf-8');
        xhr.onload = function success() {
            triggerEvent('success', {
                data: data,
                src: src
            });
        };
        xhr.onerror = xhr.onabort = function failure() {
            triggerEvent('failure', {
                data: data,
                src: src
            });
        };

        xhr.send(JSON.stringify(data));
    };
    if(globalOptions.useXHR){
        xhrRequest(data);
    } else {
        imageRequest(data);
    }
}