open and read binary file (javascript)

Question

I have a binary file on a server and I want to read it.

I did something like that to get the file :

var request = new XMLHttpRequest();
request.open("GET", file);
request.onreadystatechange = function() {
    if (request.readyState == 4) {
        doSomething(request.responseText);
    }
}
request.send();

but after that I'm not really sure what to do... What is the proper way to do this ?

is there a way to use fileReader.readAsArrayBuffer() to do what I want to do ?

Mark Vayngrib · Accepted Answer · 2013-09-22 17:17:47Z

4

Set the responseType to arrayBuffer like so:

var request = new XMLHttpRequest();
request.open("GET", file);
request.responseType = 'arrayBuffer'; // the important part
request.onreadystatechange = function() {
  if (request.readyState == 4) {
      doSomething(request.mozResponseArrayBuffer || request.response); // your arrayBuffer
  }
}

request.send();

answered Sep 22, 2013 at 17:17

Mark Vayngrib

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2 Comments

Simon-Okp Over a year ago

nice and simple, perfect !

Tom Sirgedas Over a year ago

'arraybuffer' needs to be all lowercase apparently

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