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mod conn;
mod incoming;
mod recover_error;
#[cfg(feature = "tls")]
#[cfg_attr(docsrs, doc(cfg(feature = "tls")))]
mod tls;
pub use conn::{Connected, TcpConnectInfo};
#[cfg(feature = "tls")]
pub use tls::ServerTlsConfig;
#[cfg(feature = "tls")]
pub use conn::TlsConnectInfo;
#[cfg(feature = "tls")]
use super::service::TlsAcceptor;
use incoming::TcpIncoming;
#[cfg(feature = "tls")]
pub(crate) use tokio_rustls::server::TlsStream;
#[cfg(feature = "tls")]
use crate::transport::Error;
use self::recover_error::RecoverError;
use super::service::{GrpcTimeout, Or, Routes, ServerIo};
use crate::body::BoxBody;
use bytes::Bytes;
use futures_core::Stream;
use futures_util::{
future::{self, MapErr},
ready, TryFutureExt,
};
use http::{Request, Response};
use http_body::Body as _;
use hyper::{server::accept, Body};
use pin_project::pin_project;
use std::{
fmt,
future::Future,
marker::PhantomData,
net::SocketAddr,
pin::Pin,
sync::Arc,
task::{Context, Poll},
time::Duration,
};
use tokio::io::{AsyncRead, AsyncWrite};
use tower::{
layer::util::Identity, layer::Layer, limit::concurrency::ConcurrencyLimitLayer, util::Either,
Service, ServiceBuilder,
};
type BoxHttpBody = http_body::combinators::BoxBody<Bytes, crate::Error>;
type BoxService = tower::util::BoxService<Request<Body>, Response<BoxHttpBody>, crate::Error>;
type TraceInterceptor = Arc<dyn Fn(&http::Request<()>) -> tracing::Span + Send + Sync + 'static>;
const DEFAULT_HTTP2_KEEPALIVE_TIMEOUT_SECS: u64 = 20;
#[derive(Default, Clone)]
pub struct Server<L = Identity> {
trace_interceptor: Option<TraceInterceptor>,
concurrency_limit: Option<usize>,
timeout: Option<Duration>,
#[cfg(feature = "tls")]
tls: Option<TlsAcceptor>,
init_stream_window_size: Option<u32>,
init_connection_window_size: Option<u32>,
max_concurrent_streams: Option<u32>,
tcp_keepalive: Option<Duration>,
tcp_nodelay: bool,
http2_keepalive_interval: Option<Duration>,
http2_keepalive_timeout: Option<Duration>,
max_frame_size: Option<u32>,
accept_http1: bool,
layer: L,
}
#[derive(Debug)]
pub struct Router<A, B, L = Identity> {
server: Server<L>,
routes: Routes<A, B, Request<Body>>,
}
#[derive(Debug, Clone)]
pub struct RouterService<S> {
inner: S,
}
impl<S> Service<Request<Body>> for RouterService<S>
where
S: Service<Request<Body>, Response = Response<BoxBody>> + Clone + Send + 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
{
type Response = Response<BoxBody>;
type Error = crate::Error;
#[allow(clippy::type_complexity)]
type Future = MapErr<S::Future, fn(S::Error) -> crate::Error>;
#[inline]
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
self.inner.call(req).map_err(Into::into)
}
}
pub trait NamedService {
const NAME: &'static str;
}
impl<S: NamedService, T> NamedService for Either<S, T> {
const NAME: &'static str = S::NAME;
}
impl Server {
pub fn builder() -> Self {
Server {
tcp_nodelay: true,
accept_http1: false,
..Default::default()
}
}
}
impl<L> Server<L> {
#[cfg(feature = "tls")]
#[cfg_attr(docsrs, doc(cfg(feature = "tls")))]
pub fn tls_config(self, tls_config: ServerTlsConfig) -> Result<Self, Error> {
Ok(Server {
tls: Some(tls_config.tls_acceptor().map_err(Error::from_source)?),
..self
})
}
pub fn concurrency_limit_per_connection(self, limit: usize) -> Self {
Server {
concurrency_limit: Some(limit),
..self
}
}
pub fn timeout(&mut self, timeout: Duration) -> &mut Self {
self.timeout = Some(timeout);
self
}
pub fn initial_stream_window_size(self, sz: impl Into<Option<u32>>) -> Self {
Server {
init_stream_window_size: sz.into(),
..self
}
}
pub fn initial_connection_window_size(self, sz: impl Into<Option<u32>>) -> Self {
Server {
init_connection_window_size: sz.into(),
..self
}
}
pub fn max_concurrent_streams(self, max: impl Into<Option<u32>>) -> Self {
Server {
max_concurrent_streams: max.into(),
..self
}
}
pub fn http2_keepalive_interval(self, http2_keepalive_interval: Option<Duration>) -> Self {
Server {
http2_keepalive_interval,
..self
}
}
pub fn http2_keepalive_timeout(self, http2_keepalive_timeout: Option<Duration>) -> Self {
Server {
http2_keepalive_timeout,
..self
}
}
pub fn tcp_keepalive(self, tcp_keepalive: Option<Duration>) -> Self {
Server {
tcp_keepalive,
..self
}
}
pub fn tcp_nodelay(self, enabled: bool) -> Self {
Server {
tcp_nodelay: enabled,
..self
}
}
pub fn max_frame_size(self, frame_size: impl Into<Option<u32>>) -> Self {
Server {
max_frame_size: frame_size.into(),
..self
}
}
pub fn accept_http1(self, accept_http1: bool) -> Self {
Server {
accept_http1,
..self
}
}
pub fn trace_fn<F>(self, f: F) -> Self
where
F: Fn(&http::Request<()>) -> tracing::Span + Send + Sync + 'static,
{
Server {
trace_interceptor: Some(Arc::new(f)),
..self
}
}
pub fn add_service<S>(&mut self, svc: S) -> Router<S, Unimplemented, L>
where
S: Service<Request<Body>, Response = Response<BoxBody>>
+ NamedService
+ Clone
+ Send
+ 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
L: Clone,
{
Router::new(self.clone(), svc)
}
pub fn add_optional_service<S>(
&mut self,
svc: Option<S>,
) -> Router<Either<S, Unimplemented>, Unimplemented, L>
where
S: Service<Request<Body>, Response = Response<BoxBody>>
+ NamedService
+ Clone
+ Send
+ 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
L: Clone,
{
let svc = match svc {
Some(some) => Either::A(some),
None => Either::B(Unimplemented::default()),
};
Router::new(self.clone(), svc)
}
pub fn layer<NewLayer>(self, new_layer: NewLayer) -> Server<NewLayer> {
Server {
layer: new_layer,
trace_interceptor: self.trace_interceptor,
concurrency_limit: self.concurrency_limit,
timeout: self.timeout,
#[cfg(feature = "tls")]
tls: self.tls,
init_stream_window_size: self.init_stream_window_size,
init_connection_window_size: self.init_connection_window_size,
max_concurrent_streams: self.max_concurrent_streams,
tcp_keepalive: self.tcp_keepalive,
tcp_nodelay: self.tcp_nodelay,
http2_keepalive_interval: self.http2_keepalive_interval,
http2_keepalive_timeout: self.http2_keepalive_timeout,
max_frame_size: self.max_frame_size,
accept_http1: self.accept_http1,
}
}
pub(crate) async fn serve_with_shutdown<S, I, F, IO, IE, ResBody>(
self,
svc: S,
incoming: I,
signal: Option<F>,
) -> Result<(), super::Error>
where
L: Layer<S>,
L::Service: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
<<L as Layer<S>>::Service as Service<Request<Body>>>::Future: Send + 'static,
<<L as Layer<S>>::Service as Service<Request<Body>>>::Error: Into<crate::Error> + Send,
I: Stream<Item = Result<IO, IE>>,
IO: AsyncRead + AsyncWrite + Connected + Unpin + Send + 'static,
IO::ConnectInfo: Clone + Send + Sync + 'static,
IE: Into<crate::Error>,
F: Future<Output = ()>,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
let trace_interceptor = self.trace_interceptor.clone();
let concurrency_limit = self.concurrency_limit;
let init_connection_window_size = self.init_connection_window_size;
let init_stream_window_size = self.init_stream_window_size;
let max_concurrent_streams = self.max_concurrent_streams;
let timeout = self.timeout;
let max_frame_size = self.max_frame_size;
let http2_only = !self.accept_http1;
let http2_keepalive_interval = self.http2_keepalive_interval;
let http2_keepalive_timeout = self
.http2_keepalive_timeout
.unwrap_or_else(|| Duration::new(DEFAULT_HTTP2_KEEPALIVE_TIMEOUT_SECS, 0));
let svc = self.layer.layer(svc);
let tcp = incoming::tcp_incoming(incoming, self);
let incoming = accept::from_stream::<_, _, crate::Error>(tcp);
let svc = MakeSvc {
inner: svc,
concurrency_limit,
timeout,
trace_interceptor,
_io: PhantomData,
};
let server = hyper::Server::builder(incoming)
.http2_only(http2_only)
.http2_initial_connection_window_size(init_connection_window_size)
.http2_initial_stream_window_size(init_stream_window_size)
.http2_max_concurrent_streams(max_concurrent_streams)
.http2_keep_alive_interval(http2_keepalive_interval)
.http2_keep_alive_timeout(http2_keepalive_timeout)
.http2_max_frame_size(max_frame_size);
if let Some(signal) = signal {
server
.serve(svc)
.with_graceful_shutdown(signal)
.await
.map_err(super::Error::from_source)?
} else {
server.serve(svc).await.map_err(super::Error::from_source)?;
}
Ok(())
}
}
impl<S, L> Router<S, Unimplemented, L> {
pub(crate) fn new(server: Server<L>, svc: S) -> Self
where
S: Service<Request<Body>, Response = Response<BoxBody>>
+ NamedService
+ Clone
+ Send
+ 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
{
let svc_name = <S as NamedService>::NAME;
let svc_route = format!("/{}", svc_name);
let pred = move |req: &Request<Body>| {
let path = req.uri().path();
path.starts_with(&svc_route)
};
Self {
server,
routes: Routes::new(pred, svc, Unimplemented::default()),
}
}
}
impl<A, B, L> Router<A, B, L>
where
A: Service<Request<Body>, Response = Response<BoxBody>> + Clone + Send + 'static,
A::Future: Send + 'static,
A::Error: Into<crate::Error> + Send,
B: Service<Request<Body>, Response = Response<BoxBody>> + Clone + Send + 'static,
B::Future: Send + 'static,
B::Error: Into<crate::Error> + Send,
{
pub fn add_service<S>(self, svc: S) -> Router<S, Or<A, B, Request<Body>>, L>
where
S: Service<Request<Body>, Response = Response<BoxBody>>
+ NamedService
+ Clone
+ Send
+ 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
{
let Self { routes, server } = self;
let svc_name = <S as NamedService>::NAME;
let svc_route = format!("/{}", svc_name);
let pred = move |req: &Request<Body>| {
let path = req.uri().path();
path.starts_with(&svc_route)
};
let routes = routes.push(pred, svc);
Router { server, routes }
}
#[allow(clippy::type_complexity)]
pub fn add_optional_service<S>(
self,
svc: Option<S>,
) -> Router<Either<S, Unimplemented>, Or<A, B, Request<Body>>, L>
where
S: Service<Request<Body>, Response = Response<BoxBody>>
+ NamedService
+ Clone
+ Send
+ 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
{
let Self { routes, server } = self;
let svc_name = <S as NamedService>::NAME;
let svc_route = format!("/{}", svc_name);
let pred = move |req: &Request<Body>| {
let path = req.uri().path();
path.starts_with(&svc_route)
};
let svc = match svc {
Some(some) => Either::A(some),
None => Either::B(Unimplemented::default()),
};
let routes = routes.push(pred, svc);
Router { server, routes }
}
pub async fn serve<ResBody>(self, addr: SocketAddr) -> Result<(), super::Error>
where
L: Layer<Routes<A, B, Request<Body>>>,
L::Service: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Future:
Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Error:
Into<crate::Error> + Send,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
let incoming = TcpIncoming::new(addr, self.server.tcp_nodelay, self.server.tcp_keepalive)
.map_err(super::Error::from_source)?;
self.server
.serve_with_shutdown::<_, _, future::Ready<()>, _, _, ResBody>(
self.routes,
incoming,
None,
)
.await
}
pub async fn serve_with_shutdown<F: Future<Output = ()>, ResBody>(
self,
addr: SocketAddr,
signal: F,
) -> Result<(), super::Error>
where
L: Layer<Routes<A, B, Request<Body>>>,
L::Service: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Future:
Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Error:
Into<crate::Error> + Send,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
let incoming = TcpIncoming::new(addr, self.server.tcp_nodelay, self.server.tcp_keepalive)
.map_err(super::Error::from_source)?;
self.server
.serve_with_shutdown(self.routes, incoming, Some(signal))
.await
}
pub async fn serve_with_incoming<I, IO, IE, ResBody>(
self,
incoming: I,
) -> Result<(), super::Error>
where
I: Stream<Item = Result<IO, IE>>,
IO: AsyncRead + AsyncWrite + Connected + Unpin + Send + 'static,
IO::ConnectInfo: Clone + Send + Sync + 'static,
IE: Into<crate::Error>,
L: Layer<Routes<A, B, Request<Body>>>,
L::Service: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Future:
Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Error:
Into<crate::Error> + Send,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
self.server
.serve_with_shutdown::<_, _, future::Ready<()>, _, _, ResBody>(
self.routes,
incoming,
None,
)
.await
}
pub async fn serve_with_incoming_shutdown<I, IO, IE, F, ResBody>(
self,
incoming: I,
signal: F,
) -> Result<(), super::Error>
where
I: Stream<Item = Result<IO, IE>>,
IO: AsyncRead + AsyncWrite + Connected + Unpin + Send + 'static,
IO::ConnectInfo: Clone + Send + Sync + 'static,
IE: Into<crate::Error>,
F: Future<Output = ()>,
L: Layer<Routes<A, B, Request<Body>>>,
L::Service: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Future:
Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Error:
Into<crate::Error> + Send,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
self.server
.serve_with_shutdown(self.routes, incoming, Some(signal))
.await
}
pub fn into_service<ResBody>(self) -> RouterService<L::Service>
where
L: Layer<Routes<A, B, Request<Body>>>,
L::Service: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Future:
Send + 'static,
<<L as Layer<Routes<A, B, Request<Body>>>>::Service as Service<Request<Body>>>::Error:
Into<crate::Error> + Send,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
let inner = self.server.layer.layer(self.routes);
RouterService { inner }
}
}
impl<L> fmt::Debug for Server<L> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Builder").finish()
}
}
struct Svc<S> {
inner: S,
trace_interceptor: Option<TraceInterceptor>,
}
impl<S, ResBody> Service<Request<Body>> for Svc<S>
where
S: Service<Request<Body>, Response = Response<ResBody>>,
S::Error: Into<crate::Error>,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
type Response = Response<BoxHttpBody>;
type Error = crate::Error;
type Future = SvcFuture<S::Future>;
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.inner.poll_ready(cx).map_err(Into::into)
}
fn call(&mut self, mut req: Request<Body>) -> Self::Future {
let span = if let Some(trace_interceptor) = &self.trace_interceptor {
let (parts, body) = req.into_parts();
let bodyless_request = Request::from_parts(parts, ());
let span = trace_interceptor(&bodyless_request);
let (parts, _) = bodyless_request.into_parts();
req = Request::from_parts(parts, body);
span
} else {
tracing::Span::none()
};
SvcFuture {
inner: self.inner.call(req),
span,
}
}
}
#[pin_project]
struct SvcFuture<F> {
#[pin]
inner: F,
span: tracing::Span,
}
impl<F, E, ResBody> Future for SvcFuture<F>
where
F: Future<Output = Result<Response<ResBody>, E>>,
E: Into<crate::Error>,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
type Output = Result<Response<BoxHttpBody>, crate::Error>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.project();
let _guard = this.span.enter();
let response: Response<ResBody> = ready!(this.inner.poll(cx)).map_err(Into::into)?;
let response = response.map(|body| body.map_err(Into::into).boxed());
Poll::Ready(Ok(response))
}
}
impl<S> fmt::Debug for Svc<S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Svc").finish()
}
}
struct MakeSvc<S, IO> {
concurrency_limit: Option<usize>,
timeout: Option<Duration>,
inner: S,
trace_interceptor: Option<TraceInterceptor>,
_io: PhantomData<fn() -> IO>,
}
impl<S, ResBody, IO> Service<&ServerIo<IO>> for MakeSvc<S, IO>
where
IO: Connected,
S: Service<Request<Body>, Response = Response<ResBody>> + Clone + Send + 'static,
S::Future: Send + 'static,
S::Error: Into<crate::Error> + Send,
ResBody: http_body::Body<Data = Bytes> + Send + Sync + 'static,
ResBody::Error: Into<crate::Error>,
{
type Response = BoxService;
type Error = crate::Error;
type Future = future::Ready<Result<Self::Response, Self::Error>>;
fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Ok(()).into()
}
fn call(&mut self, io: &ServerIo<IO>) -> Self::Future {
let conn_info = io.connect_info();
let svc = self.inner.clone();
let concurrency_limit = self.concurrency_limit;
let timeout = self.timeout;
let trace_interceptor = self.trace_interceptor.clone();
let svc = ServiceBuilder::new()
.layer_fn(RecoverError::new)
.option_layer(concurrency_limit.map(ConcurrencyLimitLayer::new))
.layer_fn(|s| GrpcTimeout::new(s, timeout))
.service(svc);
let svc = ServiceBuilder::new()
.layer(BoxService::layer())
.map_request(move |mut request: Request<Body>| {
match &conn_info {
tower::util::Either::A(inner) => {
request.extensions_mut().insert(inner.clone());
}
tower::util::Either::B(inner) => {
#[cfg(feature = "tls")]
{
request.extensions_mut().insert(inner.clone());
request.extensions_mut().insert(inner.get_ref().clone());
}
#[cfg(not(feature = "tls"))]
{
let _: &() = inner;
}
}
}
request
})
.service(Svc {
inner: svc,
trace_interceptor,
});
future::ready(Ok(svc))
}
}
#[derive(Default, Clone, Debug)]
#[doc(hidden)]
pub struct Unimplemented {
_p: (),
}
impl Service<Request<Body>> for Unimplemented {
type Response = Response<BoxBody>;
type Error = crate::Error;
type Future = future::Ready<Result<Self::Response, Self::Error>>;
fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Ok(()).into()
}
fn call(&mut self, _req: Request<Body>) -> Self::Future {
future::ok(
http::Response::builder()
.status(200)
.header("grpc-status", "12")
.header("content-type", "application/grpc")
.body(crate::body::empty_body())
.unwrap(),
)
}
}