var xhr = new XMLHttpRequest();
xhr.open('GET', params.url);
xhr.mozResponseType = xhr.responseType = 'arraybuffer';
- xhr.expected = (params.url.indexOf('http:') === 0 ||
- params.url.indexOf('https:') === 0) ? 200 : 0;
+ var protocol = params.url.indexOf(':') < 0 ? window.location.protocol :
+ params.url.substring(0, params.url.indexOf(':') + 1);
+ xhr.expected = (protocol === 'http:' || protocol === 'https:') ? 200 : 0;
if ('progress' in params)
xhr.onprogress = params.progress || undefined;