[p2p-hackers] Tighter HTTP and P2P integration??

[Ian Clarke]

No, Dijjer peers don't cache entire files, rather they just cache  
256k blocks of files, and these are stored in a single binary file.   
Typically any given Dijjer peer would probably only be caching one  
block from any given file.

Can you elaborate on why you might want to do this?

Ian.

On 17 Feb 2006, at 00:09, Charles Iliya Krempeaux wrote:

> Hello Ian,
>
> Is there a way to get at dijjer's cached files besides going  
> through it's local HTTP server?  (I.e., with direct file I/O.)
>
>
> See ya
>
> On 2/14/06, Ian Clarke <ian at locut.us> wrote:
> On 14 Feb 2006, at 16:38, Charles Iliya Krempeaux wrote:
> > I've been actually considering using a local HTTP server to  
> implement
> > things.  (Which is something you are doing too.)  Although I thought
> > some extra "sugar" was warranted, to help with (user) usabiliy and
> > developer usability.
>
> We have added some sugar too.  For example, we have javascript
> available on our site that can detect whether Dijjer is present on
> the user's machine and redirect the user to a download page if it  
> isn't.
>
> > I skimmed through the stuff on dijjer.org, and I have a questions.
> > Does digger pay attention to HTTP headers?  And act basically as  
> a web
> > cache?
>
> Yes, we have attempted to stick as closely to the HTTP protocol as
> possible.
>
> > For example, here's some (but not all) "rules" that I was  
> planning on
> > following.... If HTTP headers "say" that something should NOT be
> > cached, then it should NOT be on the P2P network.
>
> Yes, we obey the various HTTP no-cache headers.  We consider it
> important for Dijjer to act as much like a HTTP cache as possible so
> that we are afforded the protection the DMCA gives to caches for
> copyright infringement.
>
> >   Stuff on the P2P
> > network should be removed after the date for the "Expires" header
> > passes?
>
> We don't obey "Expires" explicitly, but since Dijjer pings the
> original web server each-time something is downloaded to ensure that
> the file is still there and hasn't changed, if it is removed from the
> web server, it will effectively be removed from Dijjer at the same
> instant.
>
> > Things from non-HTTP GET methods should NOT be put onto the
> > P2P network?  Etc.
>
> We attempt to be smart about our interaction with HTTP, if there are
> shortcomings in this regard they will be easy to fix.
>
> Ian.
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>
>
>
> -- 
>     Charles Iliya Krempeaux, B.Sc.
>
>     charles @ reptile.ca
>     supercanadian @ gmail.com
>
>     developer weblog: http://ChangeLog.ca/
> ______________________________________________________________________ 
> _____
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