Yeah, I would do that. However, I would not store the files that way,
because what if one file (dylan.mp3) is accessible to three users? So
I would do

Files: /some/private/dir/music/files/dylan.mp3 (or some other naming
convention)
Path: /downloads/:user/:musicfile

You *cannot* get to /some/private/dir/music/files/ directly by URL,
only to /downloads/:user/:musicfile, which first checks that the user
is authenticated to /downloads/:user, then checks if :musicfile is
allowed for user, and if it is, then fetches the file from its true
path.

On Feb 18, 3:57 am, Edward Smith <[email protected]> wrote:
> I would put them in a directory not accessible by clients, and have node
> route urls with specific hashes, for each file for each user.  The route
> could be something like /$user/download/$hash (anything with a $ in front
> of it will vary based off of user).  The combination of $user and $hash
> should be stored in a database so you can find out if it is valid and what
> file it should be.  Then send the file.
>
> I have never implemented something like this, but this is how I would
> probably do it.
>
>
>
>
>
>
>
> On Fri, Feb 17, 2012 at 5:45 PM, C. Mundi <[email protected]> wrote:
> > This is obviously a solved problem.  I don't want to reinvent the wheel.
>
> > Imagine a digital music store.  I have a set of static files which I need
> > to serve only to authenticated users.  So the set of accessible files
> > depends on the user.  How do I let each user get the files she is entitled
> > to and no other files?
>
> > Bad Idea 1: security by obscurity: hide the files behind query strings
> > generated on the fly for session.user in the form of nasty looking hard to
> > guess hashes.  Ugly hack and vulnerable to brute force hash collision.
> > Yuck!
>
> > Bad Idea 2: set up an instance of node-static.Server() for each
> > authenticated session, specifically serving a directory created on the fly
> > for that session and containing symlinks to all (and only) files for which
> > session.user has privileges.  The main server would redirect requests for
> > files to the ad hoc static server.  Kludgus maximus!
>
> > Good Idea: what you tell me.  :)
>
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