ExtJS 4 - 如何使用Ajax下载文件？

Ext.Ajax.request({
    url: 'your_download_url',
    method: 'GET',
    responseType: 'blob',
    success: function(response) {
        var blob = response.response;
        var url = URL.createObjectURL(blob);
        var link = document.createElement('a');
        link.href = url;
        link.download = 'your_file_name';
        link.style.display = 'none';
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
    },
    failure: function(response) {
        // 处理下载失败的情况
    }
});