Re: Partial file shating!!

Quoting rakesh <[email protected]> from ml.gnutella.dev-forum:
:Thanks Raphael
:For Gnutella as per "Partial File Sharing Protocol Version (PFSP) 1.0",The client
:requests the range it wants using the Range header.
:
:Range: bytes=0- means the client wants any ranges the server can provide.

The PFSP specs are in error.  The above simply means you're requesting the whole
file.  So this Range: header is ignored and that's why you don't get a 206.

:The issue is - I want to know all the parts of a file that peer share. For that I
:request with "Range: bytes=0-", but none of the peer respond with 206 and
:"X-Available-Ranges: " headers.
:
:They respond with 206 only when I specify random range in the "Range:" headers.
:That requires a range in Range header which is not known at the time of request.
:
:How we can know the all the shared parts of files?

You assume the file is complete and request what you need.  Then if the range
is not available, you'll get a 416 and the X-Available-Range: header will tell
you which parts can be requested.  Good servents will keep the connection open
on a 416, so you may retry one of the advertised ranges, if any suits you.

Raphael