3 changed files with 271 additions and 182 deletions
-
215src/client.rs
-
33src/download_error.rs
-
205src/main.rs
@ -0,0 +1,215 @@ |
|||||
|
use std::{path::Path, time::Duration};
|
||||
|
|
||||
|
use anyhow::anyhow;
|
||||
|
use futures_util::StreamExt as _;
|
||||
|
use http::{header::CONTENT_TYPE, uri::{Authority, Scheme}, Request, Response, Uri};
|
||||
|
use http_body_util::BodyDataStream;
|
||||
|
use log::{log, Level};
|
||||
|
use m3u8_rs::Playlist;
|
||||
|
use reqwest::{redirect::Policy, Body};
|
||||
|
use tokio::{fs::File, io::AsyncWriteExt as _, time::timeout};
|
||||
|
use tower::{ServiceBuilder, ServiceExt as _};
|
||||
|
use tower_http_client::ServiceExt as _;
|
||||
|
use tower_reqwest::HttpClientLayer;
|
||||
|
|
||||
|
use crate::download_error::DownloadError;
|
||||
|
|
||||
|
type HttpClient = tower::util::BoxCloneService<Request<Body>, Response<Body>, anyhow::Error>;
|
||||
|
|
||||
|
#[derive(Clone, Debug)]
|
||||
|
pub struct State {
|
||||
|
scheme: Scheme,
|
||||
|
auth: Authority,
|
||||
|
base_path: String,
|
||||
|
timeout: Duration,
|
||||
|
client: HttpClient,
|
||||
|
}
|
||||
|
|
||||
|
impl State {
|
||||
|
pub fn new(uri: &Uri, rate_limit: u64, concurrency_limit: usize) -> anyhow::Result<Self>
|
||||
|
{
|
||||
|
let scheme = uri.scheme()
|
||||
|
. ok_or(anyhow!("Problem scheme in m3u8 uri"))?;
|
||||
|
let authority = uri.authority()
|
||||
|
. ok_or(anyhow!("Problem authority in m3u8 uri"))?;
|
||||
|
let base_path = Path::new(uri.path()).parent()
|
||||
|
. ok_or(anyhow!("Path problem"))?
|
||||
|
. to_str()
|
||||
|
. ok_or(anyhow!("Path problem"))?;
|
||||
|
let state = State {
|
||||
|
scheme: scheme.clone(),
|
||||
|
auth: authority.clone(),
|
||||
|
base_path: base_path.to_string(),
|
||||
|
timeout: Duration::from_secs(30),
|
||||
|
client: ServiceBuilder::new()
|
||||
|
// Add some layers.
|
||||
|
. buffer(64)
|
||||
|
. rate_limit(rate_limit, Duration::from_secs(1))
|
||||
|
. concurrency_limit(concurrency_limit)
|
||||
|
// Make client compatible with the `tower-http` layers.
|
||||
|
. layer(HttpClientLayer)
|
||||
|
. service(reqwest::Client::builder()
|
||||
|
. redirect(Policy::limited(5))
|
||||
|
. build()? )
|
||||
|
. map_err(anyhow::Error::msg)
|
||||
|
. boxed_clone(),
|
||||
|
};
|
||||
|
log!(Level::Debug, "-> state: {:?}", state);
|
||||
|
|
||||
|
Ok(state)
|
||||
|
}
|
||||
|
|
||||
|
pub(super) fn set_timeout(&mut self, timeout: Duration) {
|
||||
|
self.timeout = timeout;
|
||||
|
}
|
||||
|
|
||||
|
pub(super) async fn get_m3u8_segment_uris(&mut self, path_and_query: &str)
|
||||
|
-> anyhow::Result<Vec<Uri>>
|
||||
|
{
|
||||
|
let uri = Uri::builder()
|
||||
|
. scheme(self.scheme.clone())
|
||||
|
. authority(self.auth.clone())
|
||||
|
. path_and_query(path_and_query)
|
||||
|
. build()?;
|
||||
|
let filename = Path::new(uri.path()).file_name().ok_or(anyhow!("name error"))?;
|
||||
|
let mut file = File::create(filename).await?;
|
||||
|
|
||||
|
let mut response = timeout(self.timeout, self.client.get(uri).send()?).await??;
|
||||
|
|
||||
|
anyhow::ensure!(response.status().is_success(), "response failed");
|
||||
|
|
||||
|
// read body into Vec<u8>
|
||||
|
let mut body = vec![];
|
||||
|
let mut body_stream = BodyDataStream::new(response.body_mut());
|
||||
|
'label: loop {
|
||||
|
let data = timeout(self.timeout, body_stream.next()).await?;
|
||||
|
match data {
|
||||
|
None => break 'label,
|
||||
|
Some(Err(_)) => break 'label,
|
||||
|
Some(Ok(data)) => {
|
||||
|
body.append(&mut Vec::from(data.as_ref()));
|
||||
|
},
|
||||
|
}
|
||||
|
};
|
||||
|
|
||||
|
match m3u8_rs::parse_playlist(&body) {
|
||||
|
Result::Err(e) => Err(anyhow!("m3u8 parse error: {}", e)),
|
||||
|
Result::Ok((_, Playlist::MasterPlaylist(_))) =>
|
||||
|
Err(anyhow!("Master playlist not supported now")),
|
||||
|
Result::Ok((_, Playlist::MediaPlaylist(pl))) => {
|
||||
|
let segments: anyhow::Result<Vec<_>> = pl.segments.iter().map(|s| {
|
||||
|
Ok(match Uri::try_from(s.uri.clone()) {
|
||||
|
Ok(uri) => {
|
||||
|
let mut new_segment = s.clone();
|
||||
|
let filename = Path::new(uri.path())
|
||||
|
. file_name()
|
||||
|
. ok_or(anyhow!("name error"))?
|
||||
|
. to_str()
|
||||
|
. ok_or(anyhow!("Error getting filename from uri"))?;
|
||||
|
let query = uri.query()
|
||||
|
. map(|q| "?".to_owned() + q)
|
||||
|
. unwrap_or("".to_string());
|
||||
|
new_segment.uri = (filename.to_owned() + &query).to_string();
|
||||
|
new_segment }
|
||||
|
|
||||
|
Err(_) => s.clone()
|
||||
|
})
|
||||
|
}).collect();
|
||||
|
let mut out_pl = pl.clone();
|
||||
|
out_pl.segments = segments?;
|
||||
|
let mut file_data: Vec<u8> = Vec::new();
|
||||
|
out_pl.write_to(&mut file_data)?;
|
||||
|
file.write_all(&file_data).await?;
|
||||
|
|
||||
|
let uris: anyhow::Result<Vec<_>> = pl.segments.iter().map(|s| {
|
||||
|
match Uri::try_from(s.uri.clone()) {
|
||||
|
Ok(uri) => {
|
||||
|
let scheme = uri.scheme()
|
||||
|
. or(Some(&self.scheme))
|
||||
|
. ok_or(anyhow!("No scheme in Uri"))?;
|
||||
|
let auth = uri.authority()
|
||||
|
. or(Some(&self.auth))
|
||||
|
. ok_or(anyhow!("No authority in Uri"))?;
|
||||
|
let path_and_query = uri.path_and_query()
|
||||
|
. ok_or(anyhow!("No path in Uri"))?;
|
||||
|
Ok(Uri::builder() . scheme(scheme.clone())
|
||||
|
. authority(auth.clone())
|
||||
|
. path_and_query(path_and_query.clone())
|
||||
|
. build()?) }
|
||||
|
|
||||
|
Err(e) => {
|
||||
|
log!(Level::Debug, "Uri parse error: {:?} - {}", e, s.uri);
|
||||
|
Ok(Uri::builder() . scheme(self.scheme.clone())
|
||||
|
. authority(self.auth.clone())
|
||||
|
. path_and_query(self.base_path.clone() + "/" + &s.uri)
|
||||
|
. build()?) }
|
||||
|
}
|
||||
|
}).collect();
|
||||
|
|
||||
|
uris
|
||||
|
},
|
||||
|
}
|
||||
|
}
|
||||
|
|
||||
|
pub(super) async fn get_m3u8_segment(&mut self, uri: &Uri)
|
||||
|
-> Result<(), DownloadError>
|
||||
|
{
|
||||
|
// Send get request with timeout.
|
||||
|
let send_fut = self.client
|
||||
|
. get(uri)
|
||||
|
. send()
|
||||
|
. map_err(|e| DownloadError::new(uri.clone(), Some(e.into())))?;
|
||||
|
let mut response = timeout(self.timeout, send_fut).await
|
||||
|
. map_err(|e| DownloadError::new(uri.clone(), Some(e.into())) )?
|
||||
|
. map_err(|e| DownloadError::new(uri.clone(), Some(e)) )?;
|
||||
|
|
||||
|
// This handling needs to be more elaborate... a distingtion needs to be made
|
||||
|
// between temporary and permanent failures.
|
||||
|
if ! response.status().is_success() {
|
||||
|
return Err(DownloadError::new(
|
||||
|
uri.clone()
|
||||
|
, Some(anyhow::Error::msg("request unsuccessfull"))
|
||||
|
));
|
||||
|
}
|
||||
|
|
||||
|
// We always need the content-type to be able to decide
|
||||
|
let content_type = response.headers()[CONTENT_TYPE].to_str()
|
||||
|
. expect("No content-type header found in response");
|
||||
|
|
||||
|
if content_type != "video/MP2T" {
|
||||
|
let message = format!("unexpected content-type: {}", content_type);
|
||||
|
log!(Level::Debug, "{}", message);
|
||||
|
return Err(DownloadError::new( uri.clone()
|
||||
|
, Some(anyhow::Error::msg(message)) ));
|
||||
|
}
|
||||
|
|
||||
|
// I consider a missing path as fatal... there is absolutely nothing we can do about it
|
||||
|
// and we need all files from the playlist.
|
||||
|
let path_and_query = uri.path_and_query().expect("No path and query").as_str();
|
||||
|
let filename = Path::new(path_and_query)
|
||||
|
. file_name()
|
||||
|
. expect("no filename in path_and_query");
|
||||
|
let mut file = File::create(filename).await
|
||||
|
. expect("can not create file for writing");
|
||||
|
|
||||
|
// read body into file as stream
|
||||
|
let mut body_stream = BodyDataStream::new(response.body_mut());
|
||||
|
|
||||
|
'label: loop {
|
||||
|
let data = timeout(self.timeout, body_stream.next()).await
|
||||
|
. map_err(|e| DownloadError::new(uri.clone(), Some(e.into())))?;
|
||||
|
match data {
|
||||
|
None => break 'label,
|
||||
|
Some(Err(e)) =>
|
||||
|
return Err(DownloadError::new(uri.clone(), Some(e.into()))),
|
||||
|
Some(Ok(data)) => {
|
||||
|
file.write_all(data.as_ref()).await
|
||||
|
. map_err(|e|
|
||||
|
DownloadError::new(uri.clone(), Some(e.into())) )?;
|
||||
|
},
|
||||
|
}
|
||||
|
};
|
||||
|
|
||||
|
Ok(())
|
||||
|
}
|
||||
|
}
|
||||
@ -0,0 +1,33 @@ |
|||||
|
use std::{error, fmt};
|
||||
|
|
||||
|
use http::Uri;
|
||||
|
|
||||
|
#[derive(Debug)]
|
||||
|
pub(super) struct DownloadError {
|
||||
|
pub(super) uri: Uri,
|
||||
|
pub(super) source: Option<anyhow::Error>,
|
||||
|
}
|
||||
|
|
||||
|
impl DownloadError {
|
||||
|
pub(super) fn new(uri: Uri, source: Option<anyhow::Error>) -> Self {
|
||||
|
Self { uri, source }
|
||||
|
}
|
||||
|
}
|
||||
|
|
||||
|
impl error::Error for DownloadError {
|
||||
|
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
|
||||
|
match &self.source {
|
||||
|
None => None,
|
||||
|
Some(e) => Some(e.as_ref()),
|
||||
|
}
|
||||
|
}
|
||||
|
}
|
||||
|
|
||||
|
impl fmt::Display for DownloadError {
|
||||
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
|
match &self.source {
|
||||
|
None => write!(f, "download error: {}", self.uri),
|
||||
|
Some(err) => write!(f, "download error ({}): {}", self.uri, err),
|
||||
|
}
|
||||
|
}
|
||||
|
}
|
||||
Write
Preview
Loading…
Cancel
Save
Reference in new issue