[bittorrent] structure of multifile bittorrent file
songzhang2008 at gmail.com
Fri Apr 9 17:51:04 EDT 2010
I have a question about the structure of multifile torrent file
for example, I have two files a and b, and put them into one directory. I am
trying to create one torrent file including the contents of these two files.
I am wondering how the system handling the last piece less than 256k for
each file of a and b,
size(a) = n * 256k + a1
size(b) = m * 256k + b1
a1 and b1 above all less than 256k
the question is:
1. when generating torrent files, for the ”pieces“ part of info dictionary
of torrent file, there should be two SHA1 value from pieces less than 256k,
right ? Although the SHA1 value of each piece (no matter greater or less
than 256k) is always 20bytes.
2. but I don't understand during the data transfer period, the pieces are
divided into blocks and how to handle these pieces less than 256k ?
thanks a lot for the help !!
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