KindEditor.plugin('paste', function(K) {
    var editor = this,
        name = 'paste';
    var contentWindow = document.getElementsByTagName('iframe')[0].contentWindow;
    contentWindow.document.getElementsByTagName('body')[0].onpaste = function(event) {
        // use event.originalEvent.clipboard for newer chrome versions
        var items = (event.clipboardData || event.originalEvent.clipboardData).items;
        console.log(JSON.stringify(items)); // will give you the mime types
        // find pasted image among pasted items
        var blob = null;
        for (var i = 0; i < items.length; i++) {
            if (items[i].type.indexOf("image") === 0) {
                blob = items[i].getAsFile();
            }
        }
        // load image if there is a pasted image
        if (blob !== null) {
            var reader = new FileReader();
            reader.onload = function(event) {
                console.log(event.target.result); // data url!
                var data = new FormData();
                data.append("imgFile", blob, "imageFilename.png");
                $.ajax({
                    url: '/kindeditor/upload?dir=image',
                    contentType: false,
                    type: 'POST',
                    data: data,
                    processData: false,
                    success: function(data) {
                        editor.exec('insertimage', JSON.parse(data).url);
                    }
                });
            };
            reader.readAsDataURL(blob);
        }
    }
});