Ionic upload from base64 encoded image

image.service.js

angular.module('myapp.image', [ ])
.factory('Image', function ($http) {
    
    function blobFromDataURI(dataURI) {
        var raw = window.atob(dataURI.replace(/[^,]+,/, '')),
        imgBuffer = [];

        for (var i = 0, len = raw.length; i < len; i++) {
            imgBuffer.push(raw.charCodeAt(i));
        }

        return new window.Blob([ new Uint8Array(imgBuffer) ],
                               { type: 'image/jpeg' });
    }

    function formData(name, dataURI) {
        var fd = new window.FormData();
        fd.append(name, blobFromDataURI(dataURI));
        return fd;
    }
    
    return {
        upload: function (url, dataURI) {
            return $http.post(url, formData(dataURI), {
                // This will define the Content-Type to 'multipart/form-data'
                // with an appropriate boundary
                transformRequest: angular.identity,
                 headers: {
                    'Content-Type': undefined
                }
            });
        }
    };
});

Example:

Image.upload('http://somewhere.tld/image', 'data:image/jpg;base64,/9j/4AAQSkZJRg...');