convertImgToBase64

convertImgToBase64.js

// 출처 : http://stackoverflow.com/questions/6150289/how-to-convert-image-into-base64-string-using-javascript
/**
 * Convert an image 
 * to a base64 string
 * @param  {String}   url         
 * @param  {Function} callback    
 * @param  {String}   [outputFormat=image/png]           
 */
function convertImgToBase64(url, callback, outputFormat){
    var canvas = document.createElement('CANVAS'),
        ctx = canvas.getContext('2d'),
        img = new Image;
    img.crossOrigin = 'Anonymous';
    img.onload = function(){
        var dataURL;
        canvas.height = img.height;
        canvas.width = img.width;
        ctx.drawImage(img, 0, 0);
        dataURL = canvas.toDataURL(outputFormat);
        callback.call(this, dataURL);
        canvas = null; 
    };
    img.src = url;
}


// Usage
convertImgToBase64('http://bit.ly/18g0VNp', function(base64Img){
    // Base64DataURL
});