var dt = e.dataTransfer;
        if (dt.items) {
            // Use DataTransferItemList interface to access the file(s)
            for (var i = 0; i < dt.items.length; i++) {
                if (dt.items[i].kind == "file") {
                    var f = dt.items[i].getAsFile();
                    this.uploadAsset(f, f.name);
                }
            }
        } else {
            // Use DataTransfer interface to access the file(s)
            }
        }

uploadAsset(file, name) {
const xhr = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
        const formData = new FormData();
        formData.append('file', file);
        formData.append('name', name);
        const httpMethod = "post";
        const apiMethod = 'asset/upload';
        const request = Registry.coreUrl + apiMethod;
        xhr.open(httpMethod, request, true);
        xhr.withCredentials = true;

        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4 && xhr.status == 200) {
                let asset = {};
                try {
                    let data = JSON.parse(xhr.responseText);
                } catch (e) {
                    console.log(e.message);
                    console.log(xhr.responseText);
                }

                if (typeof data.assets != 'undefined') {
                    let currentAssets = self.state.assets;
                    currentAssets = currentAssets.concat(data.assets);
                    self.setState({assets: currentAssets});
                    Registry.assetsCount = currentAssets.length;
                } else {
                    console.error("AssetStore::loadAssetList() error load assets list");
                }
            }
        };

        console.log("send request: " + request);
        xhr.send(formData);
}