Download a piece #nd2 (File size does not match expected file size)

Challenges
1

I’m stuck on Stage #nd2.

I have loaded the piece that have correct length and hash (the torrent file info), but test says that:
“File size does not match expected file size. Expected: 190404 Actual: 262144”

Screenshot_2
Screenshot_2747×416 60.3 KB

Here are my logs:

NITROROOT% codecrafters test
Initiating test run...

⚡ This is a turbo test run. https://codecrafters.io/turbo

Running tests. Logs should appear shortly...

[compile]    Compiling bittorrent-starter-rust v0.1.0 (/app)
[compile]     Finished release [optimized] target(s) in 5.16s
[compile] Compilation successful.

Debug = true

[tester::#ND2] Running tests for Stage #ND2 (Download a piece)
9 /tmp/torrents878677958/itsworking.gif.torrent 9
[your_program] IPS: [("178.62.85.20", "51493"), ("165.232.33.77", "51495"), ("178.62.82.89", "51415")]
[your_program] torrent.info.length: 2549700
[your_program] torrent.info.piece_length: 262144
[your_program] piece_hash: 01cc17bbe60fa5a52f64bd5f5b64d99286d50aa5
[your_program] info piece hashes: ["01cc17bbe60fa5a52f64bd5f5b64d99286d50aa5", "838f703cf7f6f08d1c497ed390df78f90d5f7566", "45bf10974b5816491e30628b78a382ca36c4e05f", "84be4bd855b34bcedc0c6e98f66d3e7c63353d1e", "86427ac94d6e4f21a6d0d6c8b7ffa4c393c3b131", "7c70cd5f44d1ac5505cb855d526ceb0f5f1cd5e3", "3796ab05af1fa874173a0a6c1298625ad47b4fe6", "272a8ff8fc865b053d974a78681414b38077d7b1", "b07128d3a6018062bfe779db96d3a93c05fb81d4", "7affc94f0985b985eb888a36ec92652821a21be4"]
[your_program] to file len: 262144
[your_program] Piece 9 downloaded to /tmp/torrents878677958/piece-9.
[tester::#ND2] File size does not match expected file size. Expected: 190404 Actual: 262144

[tester::#ND2] Test failed

View our article on debugging test failures: https://codecrafters.io/debug
2

Last piece of the file can be less than piece length defined in the torrent file. For example, say file length is 92063 bytes and piece length is 32768 bytes. This file will consist of 3 pieces:

  • 1st piece with 32768 bytes
  • 2nd piece with 32768 bytes
  • 3rd piece with only 26527 bytes.

It seems like you have the same issue, it’s downloading the last piece and the length of the last piece is less than piece length.

2 Likes
3

This topic was automatically closed 5 days after the last reply. New replies are no longer allowed.