extract exif orientation data from image [duplicate]

Answer 1

Possible duplicate of this question.

thanks. here's the final code example to get orientation :

var b64 = "data:image/jpeg;base64,/9j/4AAQSkZJRgABA......";
var bin = atob(b64.split(',')[1]);
var exif = EXIF.readFromBinaryFile(new BinaryFile(bin));
alert(exif.Orientation);