Utorrent Resume Dat Repairs

I am looking into making the import of utorrent's torrents far easier. I know that utorrent saves all the torrents' related data to the resume.dat file. I also know that the resume.dat file is a bencoded file. But I don't know how uttorrent keeps track of which pieces of a torrent it has downloaded. Do you have any idea/pointers on what to look in the resume.dat file?

The idea is to take the required data/info from resume.dat and make a *.fastresume file for the torrent, thus skipping the 'file checking' phase. I think I have figured it out. I had forgotten that 1byte=8bits. I think the 'have' field contains the torrent pieces as a bitmap/bitset/bitarray and each bit represents a piece. In my pic the have field has a size of 108bytes or 108*8=864bits.

It looks like the other resume.dat.old files I recovered are damaged beyond repair.I'm running another data recovery scan to see if I can find. Utorrent resume.dat is corrupted March 16, 2010 3:38 PM Subscribe I want to backup my utorrent appdata for when i upgrade to windows 7 on my htpc. But the resume.dat file is corrupt.

Utorrent reports that this torrent has 860pieces. Obviously the extra 4bits are padding. The only way to check my assumption is to count how many bits are set in this bitset. If they are equal to the downloaded pieces that utorrent reports then I am correct. This should be fairly easy to code, but I will not do it today. I have made some progress. The fields that are immediately interesting to us: have: a bitset where every piece is represented by a bit.

The value is padded to the next byte. When a piece is downloaded(even partially) the corresponding bit is set. Blocksize: the size in bytes of the size of the block(a piece consists of one or more blocks) blocks: it is a list which contains the partially downloaded pieces.

Each item represents a piece. Each item has a variable size and it depends on the number of blocks for each piece. It's size is 4bytes+((piece size / block size)/8) (probably padded to the next byte). The first 4 bytes is an usigned int representing the piece number(counting from 1). The rest of the bytes are a bitset, where each bit represents a block. If the block is downloaded the bit is set. On a sidenote: utorrent doesn't seem to keep record of the timestamps for each (download)file and it's (downloaded)size.

Sufizm (mistiko-asketicheskoe napravlenie v islame) sulawesi noun o-v Sulavesi sumatra noun o-v Sumatra sumatran 1> zhitel' ili urozhenec o-va Sumatra 2> sumatriiskii sumerian 1> shumer; shumerka 2> shumerskii yazyk 3> shumerskii sun Day 1> _am. Sufii, posledovatel' sufizma sufism 1> _arab.

Thus it cannot detect if a file is current and not modified. If you download a torrent with utorrent to 5%, exit utorrent, import the torrent to qbittorrent, download some data to >5%, exit qbittorrent and launch utorrent: utorrent will start downloading from the 5% mark and thus redownloading already downloaded data.

QBittorrent of course(and every libtorrent based client) can detect this situation and will force a recheck before starting the download, thus saving bandwidth. I am looking into making the import of utorrent's torrents far easier. I know that utorrent saves all the torrents' related data to the resume.dat file. I also know that the resume.dat file is a bencoded file. But I don't know how uttorrent keeps track of which pieces of a torrent it has downloaded.

Do you have any idea/pointers on what to look in the resume.dat file? The idea is to take the required data/info from resume.dat and make a *.fastresume file for the torrent, thus skipping the 'file checking' phase.

I have added steps for both Mac OS X and Windows, works for all versions of uTorrent (including the latest versions). Please note: Windows is untested so if someone could confirm the steps I would be grateful. Wii multi mod manager 134 download. OS X 1) Stop then Start all torrents 2) Exit uTorrent 3) Open Terminal and execute the following command (enter your password): cd '~/Library/Application Support/uTorrent' && sudo rm -f *.old.