I've been working on some issues that require generating a torrent file. I have realized we are not storing an exact copy of the uploaded torrent.
How to reproduce
- Create a new torrent from scratch using
qBittorrent v4.4.1
Using the imdl command and an online service (https://chocobo1.github.io/bencode_online/) I've extracted the torrent info from the torrent file:
$ imdl torrent show -j mandelbrot_2048x2048.png.torrent | jq
{
"name": "mandelbrot_2048x2048.png",
"comment": "Comments",
"creation_date": 1690882922,
"created_by": "qBittorrent v4.4.1",
"source": "Source",
"info_hash": "4f2ae7294f2c4865c38565f92a077d1591a0dd41",
"torrent_size": 505,
"content_size": 172204,
"private": true,
"tracker": "http://localhost",
"announce_list": [],
"update_url": null,
"dht_nodes": [],
"piece_size": 16384,
"piece_count": 11,
"file_count": 1,
"files": [
"mandelbrot_2048x2048.png"
]
}https://chocobo1.github.io/bencode_online/
{
"announce": "http://localhost",
"comment": "Comments",
"created by": "qBittorrent v4.4.1",
"creation date": 1690882922,
"info": {
"length": 172204,
"name": "mandelbrot_2048x2048.png",
"piece length": 16384,
"pieces": "<hex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hex>",
"private": 1,
"source": "Source"
},
"url-list": "http://localhost/mandelbrot_2048x2048.png"
}
-
Upload the torrent file to the Turrust Index.
-
Download the torrent file from the Torrust Index
$ imdl torrent show -j mandelbrot.torrent | jq
{
"name": "mandelbrot_2048x2048.png",
"comment": null,
"creation_date": null,
"created_by": null,
"source": null,
"info_hash": "7ba0230159ed3b4ad368f81a592c13bad70b912e",
"torrent_size": 401,
"content_size": 172204,
"private": true,
"tracker": "udp://localhost:6969",
"announce_list": [
[
"udp://localhost:6969"
]
],
"update_url": null,
"dht_nodes": [],
"piece_size": 16384,
"piece_count": 11,
"file_count": 1,
"files": [
"mandelbrot_2048x2048.png"
]
}{
"announce": "udp://localhost:6969",
"announce-list": [
[
"udp://localhost:6969"
]
],
"info": {
"length": 172204,
"name": "mandelbrot_2048x2048.png",
"piece length": 16384,
"pieces": "<hex>7D 91 71 0D 9D 4D BA 88 9B 54 20 54 D5 26 72 8D 5A 86 3F E1 21 DF 77 C7 F7 BB 6C 77 96 21 66 25 38 C5 D9 CD AB 8B 08 EF 8C 24 9B B2 F5 C4 CD 2A DF 0B C0 0C F0 AD DF 72 90 E5 B6 41 4C 23 6C 47 9B 8E 9F 46 AA 0C 0D 8E D1 97 FF EE 68 8B 5F 34 A3 87 D7 71 C5 A6 F9 8E 2E A6 31 7C BD F0 F9 E2 23 F9 CC 80 AF 54 00 04 F9 85 69 1C 77 89 C1 76 4E D6 AA BF 61 A6 C2 80 99 AB B6 5F 60 2F 40 A8 25 BE 32 A3 3D 9D 07 0C 79 68 98 D4 9D 63 49 AF 20 58 66 26 6F 98 6B 6D 32 34 CD 7D 08 15 5E 1A D0 00 09 57 AB 30 3B 20 60 C1 DC 12 87 D6 F3 E7 45 4F 70 67 09 36 31 55 F2 20 F6 6C A5 15 6F 2C 89 95 69 16 53 81 7D 31 F1 B6 BD 37 42 CC 11 0B B2 FC 2B 49 A5 85 B6 FC 76 74 44 93</hex>",
"private": 1
}
}
Missing attributes
I think we are not saving these fields:
creation_datecreated_bysourceupdate_urldht_nodes
Infohash is different!
As you can see, the infohash of the uploaded torrent is 4f2ae7294f2c4865c38565f92a077d1591a0dd41 but when you download it, the new infohash is 7ba0230159ed3b4ad368f81a592c13bad70b912e because fields are not the same.
I think we should store and exact copy of the torrent. What do you think @da2ce7?
I've been working on some issues that require generating a torrent file. I have realized we are not storing an exact copy of the uploaded torrent.
How to reproduce
qBittorrent v4.4.1Using the
imdlcommand and an online service (https://chocobo1.github.io/bencode_online/) I've extracted the torrent info from the torrent file:{ "name": "mandelbrot_2048x2048.png", "comment": "Comments", "creation_date": 1690882922, "created_by": "qBittorrent v4.4.1", "source": "Source", "info_hash": "4f2ae7294f2c4865c38565f92a077d1591a0dd41", "torrent_size": 505, "content_size": 172204, "private": true, "tracker": "http://localhost", "announce_list": [], "update_url": null, "dht_nodes": [], "piece_size": 16384, "piece_count": 11, "file_count": 1, "files": [ "mandelbrot_2048x2048.png" ] }https://chocobo1.github.io/bencode_online/
{ "announce": "http://localhost", "comment": "Comments", "created by": "qBittorrent v4.4.1", "creation date": 1690882922, "info": { "length": 172204, "name": "mandelbrot_2048x2048.png", "piece length": 16384, "pieces": "<hex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hex>", "private": 1, "source": "Source" }, "url-list": "http://localhost/mandelbrot_2048x2048.png" }Upload the torrent file to the Turrust Index.
Download the torrent file from the Torrust Index
{ "name": "mandelbrot_2048x2048.png", "comment": null, "creation_date": null, "created_by": null, "source": null, "info_hash": "7ba0230159ed3b4ad368f81a592c13bad70b912e", "torrent_size": 401, "content_size": 172204, "private": true, "tracker": "udp://localhost:6969", "announce_list": [ [ "udp://localhost:6969" ] ], "update_url": null, "dht_nodes": [], "piece_size": 16384, "piece_count": 11, "file_count": 1, "files": [ "mandelbrot_2048x2048.png" ] }Missing attributes
I think we are not saving these fields:
creation_datecreated_bysourceupdate_urldht_nodesInfohash is different!
As you can see, the infohash of the uploaded torrent is
4f2ae7294f2c4865c38565f92a077d1591a0dd41but when you download it, the new infohash is7ba0230159ed3b4ad368f81a592c13bad70b912ebecause fields are not the same.I think we should store and exact copy of the torrent. What do you think @da2ce7?