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use crate::{CloneCounter, Config, Server};
use futures_lite::prelude::*;
use std::{
convert::{TryFrom, TryInto},
io::ErrorKind,
net::{SocketAddr, TcpListener, ToSocketAddrs},
};
use trillium::Handler;
use trillium_http::{
transport::BoxedTransport, Conn as HttpConn, Error, Stopper, SERVICE_UNAVAILABLE,
};
use trillium_tls_common::Acceptor;
#[trillium::async_trait]
pub trait ConfigExt<ServerType, AcceptorType>
where
ServerType: Server + ?Sized,
{
fn port(&self) -> u16;
fn host(&self) -> String;
fn socket_addrs(&self) -> Vec<SocketAddr>;
fn should_register_signals(&self) -> bool;
fn nodelay(&self) -> bool;
fn stopper(&self) -> Stopper;
fn acceptor(&self) -> &AcceptorType;
fn counter(&self) -> &CloneCounter;
async fn graceful_shutdown(self);
async fn handle_stream(self, stream: ServerType::Transport, handler: impl Handler);
fn build_listener<Listener>(&self) -> Listener
where
Listener: TryFrom<TcpListener>,
<Listener as TryFrom<TcpListener>>::Error: std::fmt::Debug;
fn over_capacity(&self) -> bool;
}
#[trillium::async_trait]
impl<ServerType, AcceptorType> ConfigExt<ServerType, AcceptorType>
for Config<ServerType, AcceptorType>
where
ServerType: Server + Send + ?Sized,
AcceptorType: Acceptor<<ServerType as Server>::Transport>,
{
fn port(&self) -> u16 {
self.port
.or_else(|| std::env::var("PORT").ok().and_then(|p| p.parse().ok()))
.unwrap_or(8080)
}
fn host(&self) -> String {
self.host
.as_ref()
.map(String::from)
.or_else(|| std::env::var("HOST").ok())
.unwrap_or_else(|| String::from("localhost"))
}
fn socket_addrs(&self) -> Vec<SocketAddr> {
(self.host(), self.port())
.to_socket_addrs()
.unwrap()
.collect()
}
fn should_register_signals(&self) -> bool {
self.register_signals
}
fn nodelay(&self) -> bool {
self.nodelay
}
fn stopper(&self) -> Stopper {
self.stopper.clone()
}
fn acceptor(&self) -> &AcceptorType {
&self.acceptor
}
fn counter(&self) -> &CloneCounter {
&self.counter
}
async fn graceful_shutdown(self) {
let current = self.counter.current();
if current > 0 {
log::info!(
"waiting for {} open connection{} to close",
current,
if current == 1 { "" } else { "s" }
);
self.counter.await;
log::info!("all done!")
}
}
async fn handle_stream(self, mut stream: ServerType::Transport, handler: impl Handler) {
if self.over_capacity() {
let mut byte = [0u8]; trillium::log_error!(stream.read(&mut byte).await);
trillium::log_error!(stream.write_all(SERVICE_UNAVAILABLE).await);
return;
}
ServerType::set_nodelay(&mut stream, self.nodelay);
let peer_ip = ServerType::peer_ip(&stream);
let stream = match self.acceptor.accept(stream).await {
Ok(stream) => stream,
Err(e) => {
log::error!("acceptor error: {:?}", e);
return;
}
};
let result = HttpConn::map(stream, self.stopper.clone(), |mut conn| async {
conn.set_peer_ip(peer_ip);
let conn = handler.run(conn.into()).await;
let conn = handler.before_send(conn).await;
conn.into_inner()
})
.await;
match result {
Ok(Some(upgrade)) => {
let upgrade = upgrade.map_transport(BoxedTransport::new);
if handler.has_upgrade(&upgrade) {
log::debug!("upgrading...");
handler.upgrade(upgrade).await;
} else {
log::error!("upgrade specified but no upgrade handler provided");
}
}
Err(Error::Closed) | Ok(None) => {
log::debug!("closing connection");
}
Err(Error::Io(e))
if e.kind() == ErrorKind::ConnectionReset || e.kind() == ErrorKind::BrokenPipe =>
{
log::debug!("closing connection");
}
Err(e) => {
log::error!("http error: {:?}", e);
}
};
}
fn build_listener<Listener>(&self) -> Listener
where
Listener: TryFrom<TcpListener>,
<Listener as TryFrom<TcpListener>>::Error: std::fmt::Debug,
{
#[cfg(unix)]
let listener = {
use std::os::unix::prelude::FromRawFd;
if let Some(fd) = std::env::var("LISTEN_FD")
.ok()
.and_then(|fd| fd.parse().ok())
{
log::debug!("using fd {} from LISTEN_FD", fd);
unsafe { TcpListener::from_raw_fd(fd) }
} else {
TcpListener::bind((self.host(), self.port())).unwrap()
}
};
#[cfg(not(unix))]
let listener = TcpListener::bind((self.host(), self.port())).unwrap();
listener.set_nonblocking(true).unwrap();
listener.try_into().unwrap()
}
fn over_capacity(&self) -> bool {
self.max_connections
.map(|m| self.counter.current() >= m)
.unwrap_or(false)
}
}