This is a simple BitTorrent client written in Kotlin. The architecture is largely based on the c++ implementation by ss16118
Here are some main reference blog posts:
- Building a BitTorrent client from the ground up in Go
- 重复造轮子的喜悦：从零开始用C++写一个最基础的BitTorrent客户端
- Kotlin Bencode Decoding and Encoding
Currently the code works only on seeds from a site which is called AcademicTorrents (a seed from this site is provided in repo), on single file.
Compact or not compact format are supported.
It doesn't support pause and resume, multi-file or seeding, nor does it support pipeline or other advanced features.
| Options | Full Name | Desc | Misc |
|---|---|---|---|
| -s | --seed | Path to the Torrent seed | REQUIRED |
| -o | --output | The output directory to store the downloaded file | REQUIRED |
| -n | --threadnum | Number of downloading coroutines to use | 8 |
| -l | --logging | Enable logging | false (not present in parameters) |
| -f | --logfile | The directory to store the log file | ./logs/ktorrent |
If no argument is supplied or wrong arguments, the help menu will be shown.
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While connecting to a certain types of peers, the handshake will fail (the socket tries to read 68 bytes but it received an EOF)
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Not all coroutines are working (if there are 3~4/8 it's already good)FIXED? -
Timeout for TCP connection is too long
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After downloading several pieces (around a hundred of), the program hangs and all coroutines are paused.
This seems to be an issue related to a failed socket connection initialization. Sometimes it happens just after the program is launched but sometimes it has to wait until it's blocked.
- Bencode/Decode
- Retrieve a list of peers from tracker periodically
- Display download status
- Download single file with multi coroutines
