Get file from server and convert it to byte array in javascript?

Question

In javascript I want to download(get) binary files from server and use its bytes. I use this code:

$.get('/file.mp4', function(data) {
    var bytes = new Uint8Array(data.length);
    for (var i=0; i<data.length; i++) {
            bytes[i] = data.charCodeAt(i);
        }
    });

But there is a problem: some characters of data variable have ASCII code grater than 255 (like "ą" --> ASCII:261)!! and charCodeAt(i) return 65533 for them also when i use console.log(data[i]) output is "�".

I tested "ą".charCodeAt(0) and output was 261 so I guess that problem is in data that received by get method not in charCodeAt method. Is there an alternative method to download binary files??

@MatteoRubini Yes I have tried them but problem has not been solved yet. — Amin Fazlali
– Amin Fazlali, Commented Jul 29, 2015 at 9:49

Ghasem Pahlavan · Accepted Answer · 2015-07-29 10:09:57Z

3

fetch data like this:

var xhr = new XMLHttpRequest();
xhr.open('GET', '/my/image/name.png', true);
xhr.responseType = 'blob';

xhr.onload = function(e) {
  if (this.status == 200) {
    // get binary data as a response
    var blob = this.response;
  }
};

xhr.send();

answered Jul 29, 2015 at 10:09

Ghasem Pahlavan

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