1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
// SPDX-FileCopyrightText: 2025 The superseedr Contributors
// SPDX-License-Identifier: GPL-3.0-or-later
use crate::command::TorrentCommand;
use reqwest::header::RANGE;
use tokio::sync::broadcast;
use tokio::sync::mpsc::{Receiver, Sender};
use tracing::{event, Level};
pub async fn web_seed_worker(
url: String,
peer_id: String,
piece_length: u64,
total_size: u64,
mut peer_rx: Receiver<TorrentCommand>,
manager_tx: Sender<TorrentCommand>,
mut shutdown_rx: broadcast::Receiver<()>,
) {
let client = reqwest::Client::new();
// 1. Handshake sequence
if manager_tx
.send(TorrentCommand::SuccessfullyConnected(peer_id.clone()))
.await
.is_err()
{
return;
}
let num_pieces = total_size.div_ceil(piece_length);
let bitfield_len = num_pieces.div_ceil(8);
let full_bitfield = vec![255u8; bitfield_len as usize];
if manager_tx
.send(TorrentCommand::PeerBitfield(peer_id.clone(), full_bitfield))
.await
.is_err()
{
return;
}
if manager_tx
.send(TorrentCommand::Unchoke(peer_id.clone()))
.await
.is_err()
{
return;
}
// 2. Main Command Loop
'outer: loop {
tokio::select! {
_ = shutdown_rx.recv() => {
break 'outer;
}
cmd = peer_rx.recv() => {
match cmd {
// FIX: Handle BulkRequest (Batch) instead of SendRequest
Some(TorrentCommand::BulkRequest(requests)) => {
for (index, begin, length) in requests {
// Calculate absolute byte range for the HTTP request
let start = (index as u64 * piece_length) + begin as u64;
let end = start + length as u64 - 1;
let range_header = format!("bytes={}-{}", start, end);
// event!(Level::DEBUG, "WebSeed Request: {} range={}", url, range_header);
let request = client.get(&url).header(RANGE, range_header).send();
// Await the Response Header (cancellable)
let mut response = match tokio::select! {
res = request => res,
_ = shutdown_rx.recv() => break 'outer,
} {
Ok(resp) if resp.status().is_success() => resp,
Ok(resp) => {
event!(Level::WARN, "WebSeed Error {}: {}", resp.status(), url);
let _ = manager_tx.send(TorrentCommand::Disconnect(peer_id)).await;
break 'outer;
}
Err(e) => {
event!(Level::WARN, "WebSeed Connection Failed: {}", e);
let _ = manager_tx.send(TorrentCommand::Disconnect(peer_id)).await;
break 'outer;
}
};
// 3. Stream the body
let mut buffer = Vec::with_capacity(length as usize);
loop {
let chunk_option = tokio::select! {
res = response.chunk() => res,
_ = shutdown_rx.recv() => break 'outer,
};
match chunk_option {
Ok(Some(bytes)) => {
buffer.extend_from_slice(&bytes);
}
Ok(None) => {
// End of stream. Send the accumulated block.
if !buffer.is_empty()
&& manager_tx.send(TorrentCommand::Block(
peer_id.clone(),
index,
begin,
buffer,
))
.await
.is_err()
{
break 'outer;
}
break; // Finished this request, move to next in batch
}
Err(e) => {
event!(Level::WARN, "WebSeed Stream Error: {}", e);
let _ = manager_tx.send(TorrentCommand::Disconnect(peer_id)).await;
break 'outer;
}
}
}
}
}
// FIX: Handle BulkCancel (No-op for HTTP usually, or close connection)
Some(TorrentCommand::BulkCancel(_)) => {
// HTTP requests are synchronous in this loop; we can't easily cancel
// one in the middle of a batch without dropping the connection.
// For now, we ignore it. The Manager will discard the data if we send it.
}
Some(TorrentCommand::Disconnect(_)) => break 'outer,
Some(_) => {}
None => break 'outer,
}
}
}
}
}