Well, kids with a *real* education, sure!

On Sat, Feb 18, 2012 at 8:13 PM, C. Mundi <[email protected]> wrote:

> Do kids even know who Dylan is anymore?  LOL!
> On Feb 18, 2012 11:07 AM, "Avi Deitcher" <[email protected]> wrote:
>
>> Played trivial pursuit with the kids today, it came up, I got the answer!
>>
>> On Sat, Feb 18, 2012 at 8:05 PM, C. Mundi <[email protected]> wrote:
>>
>>> @deitcher: yeah. That's where I'm headed now.  I really messed myself up
>>> looking for something complicated when all I needed was to send a file.
>>> BTW...Dylan is always a good example.  :)
>>> On Feb 18, 2012 10:04 AM, "deitch" <[email protected]> wrote:
>>>
>>>> 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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