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move server accept impl to seprate module

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This commit is contained in:
Nikolay Kim 2018-07-30 13:42:42 -07:00
parent 4c4d0d2745
commit 7bc0ace52d
3 changed files with 223 additions and 197 deletions
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207
src/server/accept.rs Normal file
View file

@ -0,0 +1,207 @@
use std::sync::mpsc as sync_mpsc;
use std::time::Duration;
use std::{io, net, thread};
use futures::sync::mpsc;
use mio;
use slab::Slab;
#[cfg(feature = "tls")]
use native_tls::TlsAcceptor;
#[cfg(feature = "alpn")]
use openssl::ssl::{AlpnError, SslAcceptorBuilder};
#[cfg(feature = "rust-tls")]
use rustls::ServerConfig;
use super::srv::{ServerCommand, Socket};
use super::worker::{Conn, SocketInfo};
pub(crate) enum Command {
Pause,
Resume,
Stop,
Worker(usize, mpsc::UnboundedSender<Conn<net::TcpStream>>),
}
pub(crate) fn start_accept_thread(
token: usize, sock: Socket, srv: mpsc::UnboundedSender<ServerCommand>,
socks: Slab<SocketInfo>,
mut workers: Vec<(usize, mpsc::UnboundedSender<Conn<net::TcpStream>>)>,
) -> (mio::SetReadiness, sync_mpsc::Sender<Command>) {
let (tx, rx) = sync_mpsc::channel();
let (reg, readiness) = mio::Registration::new2();
// start accept thread
#[cfg_attr(feature = "cargo-clippy", allow(cyclomatic_complexity))]
let _ = thread::Builder::new()
.name(format!("Accept on {}", sock.addr))
.spawn(move || {
const SRV: mio::Token = mio::Token(0);
const CMD: mio::Token = mio::Token(1);
let addr = sock.addr;
let mut server = Some(
mio::net::TcpListener::from_std(sock.lst)
.expect("Can not create mio::net::TcpListener"),
);
// Create a poll instance
let poll = match mio::Poll::new() {
Ok(poll) => poll,
Err(err) => panic!("Can not create mio::Poll: {}", err),
};
// Start listening for incoming connections
if let Some(ref srv) = server {
if let Err(err) =
poll.register(srv, SRV, mio::Ready::readable(), mio::PollOpt::edge())
{
panic!("Can not register io: {}", err);
}
}
// Start listening for incoming commands
if let Err(err) =
poll.register(&reg, CMD, mio::Ready::readable(), mio::PollOpt::edge())
{
panic!("Can not register Registration: {}", err);
}
// Create storage for events
let mut events = mio::Events::with_capacity(128);
// Sleep on error
let sleep = Duration::from_millis(100);
let mut next = 0;
loop {
if let Err(err) = poll.poll(&mut events, None) {
panic!("Poll error: {}", err);
}
for event in events.iter() {
match event.token() {
SRV => if let Some(ref server) = server {
loop {
match server.accept_std() {
Ok((io, addr)) => {
let mut msg = Conn {
io,
token,
peer: Some(addr),
http2: false,
};
while !workers.is_empty() {
match workers[next].1.unbounded_send(msg) {
Ok(_) => (),
Err(err) => {
let _ = srv.unbounded_send(
ServerCommand::WorkerDied(
workers[next].0,
socks.clone(),
),
);
msg = err.into_inner();
workers.swap_remove(next);
if workers.is_empty() {
error!("No workers");
thread::sleep(sleep);
break;
} else if workers.len() <= next {
next = 0;
}
continue;
}
}
next = (next + 1) % workers.len();
break;
}
}
Err(ref e)
if e.kind() == io::ErrorKind::WouldBlock =>
{
break
}
Err(ref e) if connection_error(e) => continue,
Err(e) => {
error!("Error accepting connection: {}", e);
// sleep after error
thread::sleep(sleep);
break;
}
}
}
},
CMD => match rx.try_recv() {
Ok(cmd) => match cmd {
Command::Pause => if let Some(ref server) = server {
if let Err(err) = poll.deregister(server) {
error!(
"Can not deregister server socket {}",
err
);
} else {
info!(
"Paused accepting connections on {}",
addr
);
}
},
Command::Resume => {
if let Some(ref server) = server {
if let Err(err) = poll.register(
server,
SRV,
mio::Ready::readable(),
mio::PollOpt::edge(),
) {
error!("Can not resume socket accept process: {}", err);
} else {
info!("Accepting connections on {} has been resumed",
addr);
}
}
}
Command::Stop => {
if let Some(server) = server.take() {
let _ = poll.deregister(&server);
}
return;
}
Command::Worker(idx, addr) => {
workers.push((idx, addr));
}
},
Err(err) => match err {
sync_mpsc::TryRecvError::Empty => (),
sync_mpsc::TryRecvError::Disconnected => {
if let Some(server) = server.take() {
let _ = poll.deregister(&server);
}
return;
}
},
},
_ => unreachable!(),
}
}
}
});
(readiness, tx)
}
/// This function defines errors that are per-connection. Which basically
/// means that if we get this error from `accept()` system call it means
/// next connection might be ready to be accepted.
///
/// All other errors will incur a timeout before next `accept()` is performed.
/// The timeout is useful to handle resource exhaustion errors like ENFILE
/// and EMFILE. Otherwise, could enter into tight loop.
fn connection_error(e: &io::Error) -> bool {
e.kind() == io::ErrorKind::ConnectionRefused
|| e.kind() == io::ErrorKind::ConnectionAborted
|| e.kind() == io::ErrorKind::ConnectionReset
}

1
src/server/mod.rs
View file

@ -7,6 +7,7 @@ use futures::{Async, Poll};
use tokio_io::{AsyncRead, AsyncWrite};
use tokio_tcp::TcpStream;
pub(crate) mod accept;
mod channel;
mod error;
pub(crate) mod h1;

212
src/server/srv.rs
View file

@ -1,7 +1,7 @@
use std::rc::Rc;
use std::sync::{mpsc as sync_mpsc, Arc};
use std::time::Duration;
use std::{io, net, thread};
use std::{io, net};
use actix::{
fut, signal, Actor, ActorFuture, Addr, Arbiter, AsyncContext, Context, Handler,
@ -25,6 +25,7 @@ use openssl::ssl::{AlpnError, SslAcceptorBuilder};
#[cfg(feature = "rust-tls")]
use rustls::ServerConfig;
use super::accept::{start_accept_thread, Command};
use super::channel::{HttpChannel, WrapperStream};
use super::settings::{ServerSettings, WorkerSettings};
use super::worker::{Conn, SocketInfo, StopWorker, StreamHandlerType, Worker};
@ -75,7 +76,7 @@ where
no_signals: bool,
}
enum ServerCommand {
pub(crate) enum ServerCommand {
WorkerDied(usize, Slab<SocketInfo>),
}
@ -86,10 +87,10 @@ where
type Context = Context<Self>;
}
struct Socket {
lst: net::TcpListener,
addr: net::SocketAddr,
tp: StreamHandlerType,
pub(crate) struct Socket {
pub lst: net::TcpListener,
pub addr: net::SocketAddr,
pub tp: StreamHandlerType,
}
impl<H> HttpServer<H>
@ -132,7 +133,10 @@ where
}
#[doc(hidden)]
#[deprecated(since = "0.6.0", note = "please use `HttpServer::workers()` instead")]
#[deprecated(
since = "0.6.0",
note = "please use `HttpServer::workers()` instead"
)]
pub fn threads(self, num: usize) -> Self {
self.workers(num)
}
@ -538,7 +542,8 @@ impl<H: IntoHttpHandler> HttpServer<H> {
#[doc(hidden)]
#[cfg(feature = "tls")]
#[deprecated(
since = "0.6.0", note = "please use `actix_web::HttpServer::bind_tls` instead"
since = "0.6.0",
note = "please use `actix_web::HttpServer::bind_tls` instead"
)]
impl<H: IntoHttpHandler> HttpServer<H> {
/// Start listening for incoming tls connections.
@ -557,7 +562,8 @@ impl<H: IntoHttpHandler> HttpServer<H> {
#[doc(hidden)]
#[cfg(feature = "alpn")]
#[deprecated(
since = "0.6.0", note = "please use `actix_web::HttpServer::bind_ssl` instead"
since = "0.6.0",
note = "please use `actix_web::HttpServer::bind_ssl` instead"
)]
impl<H: IntoHttpHandler> HttpServer<H> {
/// Start listening for incoming tls connections.
@ -810,181 +816,6 @@ impl<H: IntoHttpHandler> Handler<StopServer> for HttpServer<H> {
}
}
enum Command {
Pause,
Resume,
Stop,
Worker(usize, mpsc::UnboundedSender<Conn<net::TcpStream>>),
}
fn start_accept_thread(
token: usize, sock: Socket, srv: mpsc::UnboundedSender<ServerCommand>,
socks: Slab<SocketInfo>,
mut workers: Vec<(usize, mpsc::UnboundedSender<Conn<net::TcpStream>>)>,
) -> (mio::SetReadiness, sync_mpsc::Sender<Command>) {
let (tx, rx) = sync_mpsc::channel();
let (reg, readiness) = mio::Registration::new2();
// start accept thread
#[cfg_attr(feature = "cargo-clippy", allow(cyclomatic_complexity))]
let _ = thread::Builder::new()
.name(format!("Accept on {}", sock.addr))
.spawn(move || {
const SRV: mio::Token = mio::Token(0);
const CMD: mio::Token = mio::Token(1);
let addr = sock.addr;
let mut server = Some(
mio::net::TcpListener::from_std(sock.lst)
.expect("Can not create mio::net::TcpListener"),
);
// Create a poll instance
let poll = match mio::Poll::new() {
Ok(poll) => poll,
Err(err) => panic!("Can not create mio::Poll: {}", err),
};
// Start listening for incoming connections
if let Some(ref srv) = server {
if let Err(err) =
poll.register(srv, SRV, mio::Ready::readable(), mio::PollOpt::edge())
{
panic!("Can not register io: {}", err);
}
}
// Start listening for incoming commands
if let Err(err) =
poll.register(&reg, CMD, mio::Ready::readable(), mio::PollOpt::edge())
{
panic!("Can not register Registration: {}", err);
}
// Create storage for events
let mut events = mio::Events::with_capacity(128);
// Sleep on error
let sleep = Duration::from_millis(100);
let mut next = 0;
loop {
if let Err(err) = poll.poll(&mut events, None) {
panic!("Poll error: {}", err);
}
for event in events.iter() {
match event.token() {
SRV => if let Some(ref server) = server {
loop {
match server.accept_std() {
Ok((io, addr)) => {
let mut msg = Conn {
io,
token,
peer: Some(addr),
http2: false,
};
while !workers.is_empty() {
match workers[next].1.unbounded_send(msg) {
Ok(_) => (),
Err(err) => {
let _ = srv.unbounded_send(
ServerCommand::WorkerDied(
workers[next].0,
socks.clone(),
),
);
msg = err.into_inner();
workers.swap_remove(next);
if workers.is_empty() {
error!("No workers");
thread::sleep(sleep);
break;
} else if workers.len() <= next {
next = 0;
}
continue;
}
}
next = (next + 1) % workers.len();
break;
}
}
Err(ref e)
if e.kind() == io::ErrorKind::WouldBlock =>
{
break
}
Err(ref e) if connection_error(e) => continue,
Err(e) => {
error!("Error accepting connection: {}", e);
// sleep after error
thread::sleep(sleep);
break;
}
}
}
},
CMD => match rx.try_recv() {
Ok(cmd) => match cmd {
Command::Pause => if let Some(ref server) = server {
if let Err(err) = poll.deregister(server) {
error!(
"Can not deregister server socket {}",
err
);
} else {
info!(
"Paused accepting connections on {}",
addr
);
}
},
Command::Resume => {
if let Some(ref server) = server {
if let Err(err) = poll.register(
server,
SRV,
mio::Ready::readable(),
mio::PollOpt::edge(),
) {
error!("Can not resume socket accept process: {}", err);
} else {
info!("Accepting connections on {} has been resumed",
addr);
}
}
}
Command::Stop => {
if let Some(server) = server.take() {
let _ = poll.deregister(&server);
}
return;
}
Command::Worker(idx, addr) => {
workers.push((idx, addr));
}
},
Err(err) => match err {
sync_mpsc::TryRecvError::Empty => (),
sync_mpsc::TryRecvError::Disconnected => {
if let Some(server) = server.take() {
let _ = poll.deregister(&server);
}
return;
}
},
},
_ => unreachable!(),
}
}
}
});
(readiness, tx)
}
fn create_tcp_listener(
addr: net::SocketAddr, backlog: i32,
) -> io::Result<net::TcpListener> {
@ -996,16 +827,3 @@ fn create_tcp_listener(
builder.bind(addr)?;
Ok(builder.listen(backlog)?)
}
/// This function defines errors that are per-connection. Which basically
/// means that if we get this error from `accept()` system call it means
/// next connection might be ready to be accepted.
///
/// All other errors will incur a timeout before next `accept()` is performed.
/// The timeout is useful to handle resource exhaustion errors like ENFILE
/// and EMFILE. Otherwise, could enter into tight loop.
fn connection_error(e: &io::Error) -> bool {
e.kind() == io::ErrorKind::ConnectionRefused
|| e.kind() == io::ErrorKind::ConnectionAborted
|| e.kind() == io::ErrorKind::ConnectionReset
}