126 lines
3.4 KiB
Rust
126 lines
3.4 KiB
Rust
use std::error::Error;
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use std::net::ToSocketAddrs;
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use std::sync::{
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Arc,
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Mutex,
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Weak
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};
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use bytes::{Bytes, Buf};
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use clap::{App, Arg, ArgMatches, SubCommand};
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use futures::{
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Future,
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Stream,
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Sink,
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stream::empty
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};
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use hyper::{
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Body,
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Response,
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header::{
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CACHE_CONTROL,
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CONTENT_TYPE
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}
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};
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use warp::{
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self,
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Filter
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};
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use weak_table::{
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WeakValueHashMap
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};
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use webmetro::{
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channel::{
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Channel,
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Handle,
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Listener,
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Transmitter
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},
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chunk::WebmStream,
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error::WebmetroError,
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fixers::ChunkStream,
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stream_parser::StreamEbml
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};
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const BUFFER_LIMIT: usize = 2 * 1024 * 1024;
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fn get_stream(channel: Handle) -> impl Stream<Item = Bytes, Error = WebmetroError> {
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Listener::new(channel)
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.fix_timecodes()
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.find_starting_point()
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.map(|webm_chunk| webm_chunk.into_bytes())
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.map_err(|err| match err {})
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}
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fn post_stream(channel: Handle, stream: impl Stream<Item = impl Buf, Error = impl Error + Send + Sync + 'static>) -> impl Stream<Item = Bytes, Error = WebmetroError> {
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let source = stream
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.map_err(WebmetroError::from_err)
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.parse_ebml().with_soft_limit(BUFFER_LIMIT)
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.chunk_webm().with_soft_limit(BUFFER_LIMIT);
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let sink = Transmitter::new(channel);
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source.forward(sink.sink_map_err(|err| -> WebmetroError {match err {}}))
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.into_stream()
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.map(|_| empty())
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.map_err(|err| {
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println!("[Warning] {}", err);
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err
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})
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.flatten()
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}
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fn media_response(body: Body) -> Response<Body> {
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Response::builder()
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.header(CONTENT_TYPE, "video/webm")
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.header("X-Accel-Buffering", "no")
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.header(CACHE_CONTROL, "no-cache, no-store")
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.body(body)
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.unwrap()
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}
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pub fn options() -> App<'static, 'static> {
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SubCommand::with_name("relay")
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.about("Hosts an HTTP-based relay server")
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.arg(Arg::with_name("listen")
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.help("The address:port to listen to")
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.required(true))
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}
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pub fn run(args: &ArgMatches) -> Result<(), WebmetroError> {
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let channel_map = Arc::new(Mutex::new(WeakValueHashMap::<String, Weak<Mutex<Channel>>>::new()));
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let addr_str = args.value_of("listen").ok_or("Listen address wasn't provided")?;
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let addr = addr_str.to_socket_addrs()?.next().ok_or("Listen address didn't resolve")?;
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let channel = path!("live" / String).map(move |name: String| {
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let channel = channel_map.lock().unwrap()
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.entry(name.clone())
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.or_insert_with(|| Channel::new(name.clone()));
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(channel, name)
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});
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let head = channel.clone().and(warp::head())
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.map(|(_, name)| {
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println!("[Info] HEAD Request For Channel {}", name);
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media_response(Body::empty())
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});
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let get = channel.clone().and(warp::get2())
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.map(|(channel, name)| {
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println!("[Info] Listener Connected On Channel {}", name);
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media_response(Body::wrap_stream(get_stream(channel)))
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});
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let post_put = channel.clone().and(warp::post2().or(warp::put2()).unify())
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.and(warp::body::stream()).map(|(channel, name), stream| {
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println!("[Info] Source Connected On Channel {}", name);
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Response::new(Body::wrap_stream(post_stream(channel, stream)))
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});
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let routes = head
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.or(get)
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.or(post_put);
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Ok(warp::serve(routes).run(addr))
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}
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