372 lines
13 KiB
Rust
372 lines
13 KiB
Rust
use std::{fs::File, io::Read, net::SocketAddr, path::PathBuf, time::Duration};
|
|
|
|
use anyhow::Context;
|
|
use buffers::ByteString;
|
|
use dht::{Dht, Id20, PersistentDht, PersistentDhtConfig};
|
|
use librqbit_core::{
|
|
magnet::Magnet,
|
|
peer_id::generate_peer_id,
|
|
torrent_metainfo::{torrent_from_bytes, TorrentMetaV1Info, TorrentMetaV1Owned},
|
|
};
|
|
use log::{info, warn};
|
|
use reqwest::Url;
|
|
use tokio_stream::StreamExt;
|
|
|
|
use size_format::SizeFormatterBinary as SF;
|
|
|
|
use crate::{
|
|
dht_utils::{read_metainfo_from_peer_receiver, ReadMetainfoResult},
|
|
http_api::HttpApi,
|
|
peer_connection::PeerConnectionOptions,
|
|
spawn_utils::{spawn, BlockingSpawner},
|
|
torrent_manager::{TorrentManagerBuilder, TorrentManagerHandle},
|
|
};
|
|
|
|
pub struct Session {
|
|
peer_id: Id20,
|
|
dht: Option<Dht>,
|
|
http_api: Option<HttpApi>,
|
|
peer_opts: PeerConnectionOptions,
|
|
spawner: BlockingSpawner,
|
|
output_folder: PathBuf,
|
|
}
|
|
|
|
async fn torrent_from_url(url: &str) -> anyhow::Result<TorrentMetaV1Owned> {
|
|
let response = reqwest::get(url)
|
|
.await
|
|
.with_context(|| format!("error downloading torrent metadata from {}", url))?;
|
|
if !response.status().is_success() {
|
|
anyhow::bail!("GET {} returned {}", url, response.status())
|
|
}
|
|
let b = response
|
|
.bytes()
|
|
.await
|
|
.with_context(|| format!("error reading repsonse body from {}", url))?;
|
|
torrent_from_bytes(&b).context("error decoding torrent")
|
|
}
|
|
|
|
fn torrent_from_file(filename: &str) -> anyhow::Result<TorrentMetaV1Owned> {
|
|
let mut buf = Vec::new();
|
|
if filename == "-" {
|
|
std::io::stdin()
|
|
.read_to_end(&mut buf)
|
|
.context("error reading stdin")?;
|
|
} else {
|
|
File::open(filename)
|
|
.with_context(|| format!("error opening {}", filename))?
|
|
.read_to_end(&mut buf)
|
|
.with_context(|| format!("error reading {}", filename))?;
|
|
}
|
|
torrent_from_bytes(&buf).context("error decoding torrent")
|
|
}
|
|
|
|
fn compute_only_files<ByteBuf: AsRef<[u8]>>(
|
|
torrent: &TorrentMetaV1Info<ByteBuf>,
|
|
filename_re: &str,
|
|
) -> anyhow::Result<Vec<usize>> {
|
|
let filename_re = regex::Regex::new(filename_re).context("filename regex is incorrect")?;
|
|
let mut only_files = Vec::new();
|
|
for (idx, (filename, _)) in torrent.iter_filenames_and_lengths()?.enumerate() {
|
|
let full_path = filename
|
|
.to_pathbuf()
|
|
.with_context(|| format!("filename of file {} is not valid utf8", idx))?;
|
|
if filename_re.is_match(full_path.to_str().unwrap()) {
|
|
only_files.push(idx);
|
|
}
|
|
}
|
|
if only_files.is_empty() {
|
|
anyhow::bail!("none of the filenames match the given regex")
|
|
}
|
|
Ok(only_files)
|
|
}
|
|
|
|
#[derive(Default)]
|
|
pub struct AddTorrentOptions {
|
|
pub only_files_regex: Option<String>,
|
|
pub overwrite: bool,
|
|
pub list_only: bool,
|
|
pub output_folder: Option<String>,
|
|
pub peer_opts: Option<PeerConnectionOptions>,
|
|
pub force_tracker_interval: Option<Duration>,
|
|
}
|
|
|
|
#[derive(Default)]
|
|
pub struct SessionOptions {
|
|
pub disable_dht: bool,
|
|
pub disable_dht_persistence: bool,
|
|
pub dht_config: Option<PersistentDhtConfig>,
|
|
pub disable_http_api: bool,
|
|
pub http_api_listen_addr: Option<SocketAddr>,
|
|
pub peer_id: Option<Id20>,
|
|
pub peer_opts: Option<PeerConnectionOptions>,
|
|
}
|
|
|
|
impl Session {
|
|
pub async fn new(output_folder: PathBuf, spawner: BlockingSpawner) -> anyhow::Result<Self> {
|
|
Self::new_with_opts(output_folder, spawner, SessionOptions::default()).await
|
|
}
|
|
pub async fn new_with_opts(
|
|
output_folder: PathBuf,
|
|
spawner: BlockingSpawner,
|
|
opts: SessionOptions,
|
|
) -> anyhow::Result<Self> {
|
|
let peer_id = opts.peer_id.unwrap_or_else(generate_peer_id);
|
|
let dht = if opts.disable_dht {
|
|
None
|
|
} else {
|
|
let dht = if opts.disable_dht_persistence {
|
|
Dht::new().await
|
|
} else {
|
|
PersistentDht::create(opts.dht_config).await
|
|
}
|
|
.context("error initializing DHT")?;
|
|
Some(dht)
|
|
};
|
|
let peer_opts = opts.peer_opts.unwrap_or_default();
|
|
|
|
let http_api = if opts.disable_http_api {
|
|
None
|
|
} else {
|
|
let http_api_listen_addr = opts
|
|
.http_api_listen_addr
|
|
.unwrap_or_else(|| "127.0.0.1:3001".parse().unwrap());
|
|
let http_api = HttpApi::new(dht.clone());
|
|
spawn("HTTP API", {
|
|
let http_api = http_api.clone();
|
|
async move { http_api.make_http_api_and_run(http_api_listen_addr).await }
|
|
});
|
|
Some(http_api)
|
|
};
|
|
|
|
Ok(Self {
|
|
peer_id,
|
|
dht,
|
|
http_api,
|
|
peer_opts,
|
|
spawner,
|
|
output_folder,
|
|
})
|
|
}
|
|
pub async fn add_torrent(
|
|
&self,
|
|
url: String,
|
|
opts: Option<AddTorrentOptions>,
|
|
) -> anyhow::Result<Option<TorrentManagerHandle>> {
|
|
// Magnet links are different in that we first need to discover the metadata.
|
|
let opts = opts.unwrap_or_default();
|
|
if url.starts_with("magnet:") {
|
|
let Magnet {
|
|
info_hash,
|
|
trackers,
|
|
} = Magnet::parse(&url).context("provided path is not a valid magnet URL")?;
|
|
|
|
let dht_rx = self
|
|
.dht
|
|
.as_ref()
|
|
.context("magnet links without DHT are not supported")?
|
|
.get_peers(info_hash)
|
|
.await?;
|
|
|
|
let trackers = trackers
|
|
.into_iter()
|
|
.filter_map(|url| match reqwest::Url::parse(&url) {
|
|
Ok(url) => Some(url),
|
|
Err(e) => {
|
|
warn!("error parsing tracker {} as url: {}", url, e);
|
|
None
|
|
}
|
|
})
|
|
.collect();
|
|
|
|
let (info, dht_rx, initial_peers) = match read_metainfo_from_peer_receiver(
|
|
self.peer_id,
|
|
info_hash,
|
|
dht_rx,
|
|
Some(self.peer_opts),
|
|
)
|
|
.await
|
|
{
|
|
ReadMetainfoResult::Found { info, rx, seen } => (info, rx, seen),
|
|
ReadMetainfoResult::ChannelClosed { .. } => {
|
|
anyhow::bail!("DHT died, no way to discover torrent metainfo")
|
|
}
|
|
};
|
|
self.main_torrent_info(
|
|
info_hash,
|
|
info,
|
|
Some(dht_rx),
|
|
initial_peers.into_iter().collect(),
|
|
trackers,
|
|
opts,
|
|
)
|
|
.await
|
|
} else {
|
|
let torrent = if url.starts_with("http://") || url.starts_with("https://") {
|
|
torrent_from_url(&url).await?
|
|
} else {
|
|
torrent_from_file(&url)?
|
|
};
|
|
let dht_rx = match self.dht.as_ref() {
|
|
Some(dht) => Some(dht.get_peers(torrent.info_hash).await?),
|
|
None => None,
|
|
};
|
|
let trackers = torrent
|
|
.iter_announce()
|
|
.filter_map(|tracker| {
|
|
let url = match std::str::from_utf8(tracker.as_ref()) {
|
|
Ok(url) => url,
|
|
Err(_) => {
|
|
warn!("cannot parse tracker url as utf-8, ignoring");
|
|
return None;
|
|
}
|
|
};
|
|
match Url::parse(url) {
|
|
Ok(url) => Some(url),
|
|
Err(e) => {
|
|
warn!("cannot parse tracker URL {}: {}", url, e);
|
|
None
|
|
}
|
|
}
|
|
})
|
|
.collect::<Vec<_>>();
|
|
self.main_torrent_info(
|
|
torrent.info_hash,
|
|
torrent.info,
|
|
dht_rx,
|
|
Vec::new(),
|
|
trackers,
|
|
opts,
|
|
)
|
|
.await
|
|
}
|
|
}
|
|
|
|
#[allow(clippy::too_many_arguments)]
|
|
async fn main_torrent_info(
|
|
&self,
|
|
info_hash: Id20,
|
|
info: TorrentMetaV1Info<ByteString>,
|
|
dht_peer_rx: Option<impl StreamExt<Item = SocketAddr> + Unpin + Send + Sync + 'static>,
|
|
initial_peers: Vec<SocketAddr>,
|
|
trackers: Vec<reqwest::Url>,
|
|
opts: AddTorrentOptions,
|
|
) -> anyhow::Result<Option<TorrentManagerHandle>> {
|
|
info!("Torrent info: {:#?}", &info);
|
|
let only_files = if let Some(filename_re) = opts.only_files_regex {
|
|
let only_files = compute_only_files(&info, &filename_re)?;
|
|
for (idx, (filename, _)) in info.iter_filenames_and_lengths()?.enumerate() {
|
|
if !only_files.contains(&idx) {
|
|
continue;
|
|
}
|
|
info!("Will download {:?}", filename);
|
|
}
|
|
Some(only_files)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
if opts.list_only {
|
|
for (idx, (filename, len)) in info.iter_filenames_and_lengths()?.enumerate() {
|
|
let included = match &only_files {
|
|
Some(files) => files.contains(&idx),
|
|
None => true,
|
|
};
|
|
info!(
|
|
"File {}, size {}{}",
|
|
filename.to_string()?,
|
|
SF::new(len),
|
|
if included { "" } else { "will skip" }
|
|
)
|
|
}
|
|
info!("--list was passed, nothing to do, exiting.");
|
|
return Ok(None);
|
|
}
|
|
|
|
let output_folder = opts
|
|
.output_folder
|
|
.map(PathBuf::from)
|
|
.unwrap_or_else(|| self.output_folder.clone());
|
|
|
|
let mut builder = TorrentManagerBuilder::new(info, info_hash, output_folder);
|
|
builder
|
|
.overwrite(opts.overwrite)
|
|
.spawner(self.spawner)
|
|
.peer_id(self.peer_id);
|
|
if let Some(only_files) = only_files {
|
|
builder.only_files(only_files);
|
|
}
|
|
if let Some(interval) = opts.force_tracker_interval {
|
|
builder.force_tracker_interval(interval);
|
|
}
|
|
|
|
if let Some(t) = opts.peer_opts.unwrap_or(self.peer_opts).connect_timeout {
|
|
builder.peer_connect_timeout(t);
|
|
}
|
|
|
|
// let http_api = HttpApi::new(self.dht.clone());
|
|
// spawn("HTTP API", {
|
|
// let http_api = http_api.clone();
|
|
// async move { http_api.make_http_api_and_run(http_api_listen_addr).await }
|
|
// });
|
|
|
|
let handle = builder.start_manager()?;
|
|
if let Some(http_api) = self.http_api.as_ref() {
|
|
http_api.add_mgr(handle.clone());
|
|
}
|
|
|
|
for url in trackers {
|
|
handle.add_tracker(url);
|
|
}
|
|
for peer in initial_peers {
|
|
handle.add_peer(peer);
|
|
}
|
|
|
|
spawn("Stats printer", {
|
|
let handle = handle.clone();
|
|
async move {
|
|
loop {
|
|
let peer_stats = handle.torrent_state().peer_stats_snapshot();
|
|
let stats = handle.torrent_state().stats_snapshot();
|
|
let speed = handle.speed_estimator();
|
|
let total = stats.total_bytes;
|
|
let progress = stats.total_bytes - stats.remaining_bytes;
|
|
let downloaded_pct = if stats.remaining_bytes == 0 {
|
|
100f64
|
|
} else {
|
|
(progress as f64 / total as f64) * 100f64
|
|
};
|
|
info!(
|
|
"Stats: {:.2}% ({:.2}), down speed {:.2} Mbps, fetched {}, remaining {:.2} of {:.2}, uploaded {:.2}, peers: {{live: {}, connecting: {}, queued: {}, seen: {}}}",
|
|
downloaded_pct,
|
|
SF::new(progress),
|
|
speed.download_mbps(),
|
|
SF::new(stats.fetched_bytes),
|
|
SF::new(stats.remaining_bytes),
|
|
SF::new(total),
|
|
SF::new(stats.uploaded_bytes),
|
|
peer_stats.live,
|
|
peer_stats.connecting,
|
|
peer_stats.queued,
|
|
peer_stats.seen,
|
|
);
|
|
tokio::time::sleep(Duration::from_secs(1)).await;
|
|
}
|
|
}
|
|
});
|
|
|
|
if let Some(mut dht_peer_rx) = dht_peer_rx {
|
|
spawn("DHT peer adder", {
|
|
let handle = handle.clone();
|
|
async move {
|
|
while let Some(peer) = dht_peer_rx.next().await {
|
|
handle.add_peer(peer);
|
|
}
|
|
warn!("dht was closed");
|
|
Ok(())
|
|
}
|
|
});
|
|
}
|
|
|
|
Ok(Some(handle))
|
|
}
|
|
}
|