uTorrent not opening torrent it created itself

[TimPlethor]

I ran into a funny problem. Situtation, I wanted to test a comment I read about auto-detect allowing peice sizes above 4MB when creating .torrents with uTorrent.

So I used one of my larger directories (1.2TB) and created a torrent with uTorrent + auto-detect. uTorrent was all happy and spit out "Torrent Created Successfully", however, when trying to open said torrent with uTorrent it said "Invalid Torrent File".

I was then forced to use Vuze/MooPolice/Azureze/etc, basically every torrent client worked/hashed the directory at 100% except uTorrent *aka the creator of the torrent LOL*.

When in Vuze I looked at the piece size which indeed uTorrent used 4MB @ 314k pieces when creating the torrent. Conclusion, auto-detect doesn't go above the max 4MB, and, uTorrent torrent creator makes terrible choices for larger torrent sizes.

1. Fix the utorrent torrent creator by crippling it [sic], or, fix uTorrent to work with torrents created with its own creator. Regardless of which side, it shouldn't be wishywashy; in my opinion both needs to be fixed to allow higher piece sizes / # of peices.

2. If you still insist on crippling your software, I suggest two more things.

a) put more detailed error messages than "Invalid Torrent File", as according to the BT-spec it is not invalid, and indeed works with all other torrent clients I tested. For example "Invalid Torrent File: 16MB+ peice size, use different client".

Update uTorrents mantra from "µTorrent - a (very) tiny BitTorrent client" to "µTorrent - a (very) tiny BitTorrent client for (very) tiny .torrent files".

As a little help I digged up uTorrents source code to help the devs fix their problems: uTorrent's TorrentCheck.cpp

void CheckTorrent() {
  uint piece_size;
  uint num_of_pieces;
  ulong total_size;
  bool invalid_torrent, bens_standards;
[...]
  if(piece_size * num_of_pieces < total_size)
    invalid_torrent = true; /* CORRUPT TORRENT FILE */

  /* Okay, technical stuff out of the way, torrent is valid according to 
   * the "BT Spec", now to check "Bens BT Easter Egg Spec" */
  if(total_size > get_folder_size("C:\BensPics\"))
    bens_standards = true; /* Bens has a lot of pics, no one needs to be using torrent files
                                          larger than Bens Directory, he has a lot of pics. */

  if(piece_size > 16MB)
    bens_standards = true; /* Ben uses 16MB peice size for his torrent, so that
                              is what we will force you to use too */

  if(random_other_variable > 3)
    bens_standards = true; /* Oww no you don't, my BT-Spec says nothing about this, 3 is
                                          good enough for you */

  /* Checks Done, Finish Up */
  if(invalid_torrent || bens_standards) {
#ifdef LONGHELP
    MessageBox.Show("Ben says no");
#else
    MessageBox.Show("Invalid Torrent File");
#endif
   exit(0);  /* Kill app, the goat was not properly sacrificed, where is Ben? */
  }

  /* Yay Ben standards adhered, you may continue */
  [...]
}