google-app-engine - 从 Google App Engine 流式传输音频

Question

一般情况下，是否可以在 AppEngine 上从 BlobStore 流式传输音频文件？
如果是，那么如何从直接 url 流式传输 .mp3 文件？

Answer 1

是的!! 这是我的实现:

public class Serve extends HttpServlet {

    private static final long serialVersionUID = 5603629129606331547L;

    public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {
        BlobKey blobKey = new BlobKey(req.getParameter("blob-key"));
        BlobstoreServiceFactory.getBlobstoreService().serve(blobKey, res);
    }
}

.. 这是 web.xml:

<servlet>
        <servlet-name>Serve</servlet-name>
        <servlet-class><my-package>.Serve</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Serve</servlet-name>
        <url-pattern>/serve</url-pattern>
    </servlet-mapping>

注意“直接 url”(我想你的意思是 getServingUrl)只存在于图片中: https://developers.google.com/appengine/docs/java/images/overview#Transforming_Images_from_the_Blobstore