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Editorial Team
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Asked: 2026-05-23T14:23:30+00:00

I’ve started a project, it’s a web application to let the world listen all

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I’ve started a project, it’s a web application to let the world listen all of my personnal songs. So far, all the songs available on the website are stored in war/songs. Then, my database only stores the path to this file and that works really nicely.

I wanted to created a web page only accessible to admin (basically me :D) to upload my songs at this location, so I don’t have to deploy the entire project just to add a song … And I am now reading that it’s impossible in app engine ? I don’t think storing the songs in the database is a good idea ?

Can I have you thoughts on my issue ? Thanks a lot !

Also, if app engine is not suited to my goal, I wanted to know some good place to host my java application … that seems quite rare !

Thanks again ..

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1 Answer

  1. Editorial Team

    It is possible on GAE. Simply you have to store your files in Blobstore, not in filesystem. Instead of path you could use blob key. You can upload your files like this:

    <body>
<form action="<%= blobstoreService.createUploadUrl("/upload") %>" method="post" enctype="multipart/form-data">
    <input type="file" name="myFile">
    <input type="submit" value="Submit">
</form>

    And you can set in web.xml constraint to prevent access to your site:

    <security-constraint>
    <web-resource-collection>
        <url-pattern>/admin/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
        <role-name>admin</role-name>
    </auth-constraint>
</security-constraint>

    And then to serve file from servlet:

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