我正在使用Polymer的iron-ajax元素向服务器端点发送XMLHTTPRequest:
<iron-ajax
id="ajax"
method="POST"
url="/export/"
params=''
handle-as="json"
on-response="handleResponse"
</iron-ajax>
我的Koa / Express服务器使用如下读取流进行响应:
router.post('/export' , function*(){
var file = __dirname + '/test.zip';
var filename = path.basename(file);
var mimetype = mime.lookup(file);
this.set('Content-disposition', 'attachment; filename=' + filename);
this.set('Content-type', mimetype);
this.body = fs.createReadStream(file);
})
如何在handleResponse()
启动下载?
理想情况下,我根本不想处理响应并直接启动下载。
响应头看起来像预期的那样:
Content-disposition: attachment; filename=test.zip
Connection: keep-alive
Transfer-Encoding: chunked
Content-type: application/zip
答案 0 :(得分:2)
如果您将文件数据作为八位字节流返回,则可以启动下载,例如此处完成 - &gt; Save file Javascript with file name
uriContent = "data:application/octet-stream," + encodeURIComponent(dataFromServer);
newWindow=window.open(uriContent, 'filename.txt');