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Diffstat (limited to 'third_party/rust/hyper/src/server/conn.rs')
| -rw-r--r-- | third_party/rust/hyper/src/server/conn.rs | 1045 |
1 files changed, 1045 insertions, 0 deletions
diff --git a/third_party/rust/hyper/src/server/conn.rs b/third_party/rust/hyper/src/server/conn.rs new file mode 100644 index 0000000000..d5370b0f14 --- /dev/null +++ b/third_party/rust/hyper/src/server/conn.rs @@ -0,0 +1,1045 @@ +//! Lower-level Server connection API. +//! +//! The types in this module are to provide a lower-level API based around a +//! single connection. Accepting a connection and binding it with a service +//! are not handled at this level. This module provides the building blocks to +//! customize those things externally. +//! +//! If you don't have need to manage connections yourself, consider using the +//! higher-level [Server](super) API. +//! +//! ## Example +//! A simple example that uses the `Http` struct to talk HTTP over a Tokio TCP stream +//! ```no_run +//! # #[cfg(all(feature = "http1", feature = "runtime"))] +//! # mod rt { +//! use http::{Request, Response, StatusCode}; +//! use hyper::{server::conn::Http, service::service_fn, Body}; +//! use std::{net::SocketAddr, convert::Infallible}; +//! use tokio::net::TcpListener; +//! +//! #[tokio::main] +//! async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> { +//! let addr: SocketAddr = ([127, 0, 0, 1], 8080).into(); +//! +//! let mut tcp_listener = TcpListener::bind(addr).await?; +//! loop { +//! let (tcp_stream, _) = tcp_listener.accept().await?; +//! tokio::task::spawn(async move { +//! if let Err(http_err) = Http::new() +//! .http1_only(true) +//! .http1_keep_alive(true) +//! .serve_connection(tcp_stream, service_fn(hello)) +//! .await { +//! eprintln!("Error while serving HTTP connection: {}", http_err); +//! } +//! }); +//! } +//! } +//! +//! async fn hello(_req: Request<Body>) -> Result<Response<Body>, Infallible> { +//! Ok(Response::new(Body::from("Hello World!"))) +//! } +//! # } +//! ``` + +#[cfg(all( + any(feature = "http1", feature = "http2"), + not(all(feature = "http1", feature = "http2")) +))] +use std::marker::PhantomData; +#[cfg(all(any(feature = "http1", feature = "http2"), feature = "runtime"))] +use std::time::Duration; + +#[cfg(feature = "http2")] +use crate::common::io::Rewind; +#[cfg(all(feature = "http1", feature = "http2"))] +use crate::error::{Kind, Parse}; +#[cfg(feature = "http1")] +use crate::upgrade::Upgraded; + +cfg_feature! { + #![any(feature = "http1", feature = "http2")] + + use std::error::Error as StdError; + use std::fmt; + + use bytes::Bytes; + use pin_project_lite::pin_project; + use tokio::io::{AsyncRead, AsyncWrite}; + use tracing::trace; + + pub use super::server::Connecting; + use crate::body::{Body, HttpBody}; + use crate::common::{task, Future, Pin, Poll, Unpin}; + #[cfg(not(all(feature = "http1", feature = "http2")))] + use crate::common::Never; + use crate::common::exec::{ConnStreamExec, Exec}; + use crate::proto; + use crate::service::HttpService; + + pub(super) use self::upgrades::UpgradeableConnection; +} + +#[cfg(feature = "tcp")] +pub use super::tcp::{AddrIncoming, AddrStream}; + +/// A lower-level configuration of the HTTP protocol. +/// +/// This structure is used to configure options for an HTTP server connection. +/// +/// If you don't have need to manage connections yourself, consider using the +/// higher-level [Server](super) API. +#[derive(Clone, Debug)] +#[cfg(any(feature = "http1", feature = "http2"))] +#[cfg_attr(docsrs, doc(cfg(any(feature = "http1", feature = "http2"))))] +pub struct Http<E = Exec> { + pub(crate) exec: E, + h1_half_close: bool, + h1_keep_alive: bool, + h1_title_case_headers: bool, + h1_preserve_header_case: bool, + #[cfg(all(feature = "http1", feature = "runtime"))] + h1_header_read_timeout: Option<Duration>, + h1_writev: Option<bool>, + #[cfg(feature = "http2")] + h2_builder: proto::h2::server::Config, + mode: ConnectionMode, + max_buf_size: Option<usize>, + pipeline_flush: bool, +} + +/// The internal mode of HTTP protocol which indicates the behavior when a parse error occurs. +#[cfg(any(feature = "http1", feature = "http2"))] +#[derive(Clone, Debug, PartialEq)] +enum ConnectionMode { + /// Always use HTTP/1 and do not upgrade when a parse error occurs. + #[cfg(feature = "http1")] + H1Only, + /// Always use HTTP/2. + #[cfg(feature = "http2")] + H2Only, + /// Use HTTP/1 and try to upgrade to h2 when a parse error occurs. + #[cfg(all(feature = "http1", feature = "http2"))] + Fallback, +} + +#[cfg(any(feature = "http1", feature = "http2"))] +pin_project! { + /// A future binding a connection with a Service. + /// + /// Polling this future will drive HTTP forward. + #[must_use = "futures do nothing unless polled"] + #[cfg_attr(docsrs, doc(cfg(any(feature = "http1", feature = "http2"))))] + pub struct Connection<T, S, E = Exec> + where + S: HttpService<Body>, + { + pub(super) conn: Option<ProtoServer<T, S::ResBody, S, E>>, + fallback: Fallback<E>, + } +} + +#[cfg(feature = "http1")] +type Http1Dispatcher<T, B, S> = + proto::h1::Dispatcher<proto::h1::dispatch::Server<S, Body>, B, T, proto::ServerTransaction>; + +#[cfg(all(not(feature = "http1"), feature = "http2"))] +type Http1Dispatcher<T, B, S> = (Never, PhantomData<(T, Box<Pin<B>>, Box<Pin<S>>)>); + +#[cfg(feature = "http2")] +type Http2Server<T, B, S, E> = proto::h2::Server<Rewind<T>, S, B, E>; + +#[cfg(all(not(feature = "http2"), feature = "http1"))] +type Http2Server<T, B, S, E> = ( + Never, + PhantomData<(T, Box<Pin<S>>, Box<Pin<B>>, Box<Pin<E>>)>, +); + +#[cfg(any(feature = "http1", feature = "http2"))] +pin_project! { + #[project = ProtoServerProj] + pub(super) enum ProtoServer<T, B, S, E = Exec> + where + S: HttpService<Body>, + B: HttpBody, + { + H1 { + #[pin] + h1: Http1Dispatcher<T, B, S>, + }, + H2 { + #[pin] + h2: Http2Server<T, B, S, E>, + }, + } +} + +#[cfg(all(feature = "http1", feature = "http2"))] +#[derive(Clone, Debug)] +enum Fallback<E> { + ToHttp2(proto::h2::server::Config, E), + Http1Only, +} + +#[cfg(all( + any(feature = "http1", feature = "http2"), + not(all(feature = "http1", feature = "http2")) +))] +type Fallback<E> = PhantomData<E>; + +#[cfg(all(feature = "http1", feature = "http2"))] +impl<E> Fallback<E> { + fn to_h2(&self) -> bool { + match *self { + Fallback::ToHttp2(..) => true, + Fallback::Http1Only => false, + } + } +} + +#[cfg(all(feature = "http1", feature = "http2"))] +impl<E> Unpin for Fallback<E> {} + +/// Deconstructed parts of a `Connection`. +/// +/// This allows taking apart a `Connection` at a later time, in order to +/// reclaim the IO object, and additional related pieces. +#[derive(Debug)] +#[cfg(any(feature = "http1", feature = "http2"))] +#[cfg_attr(docsrs, doc(cfg(any(feature = "http1", feature = "http2"))))] +pub struct Parts<T, S> { + /// The original IO object used in the handshake. + pub io: T, + /// A buffer of bytes that have been read but not processed as HTTP. + /// + /// If the client sent additional bytes after its last request, and + /// this connection "ended" with an upgrade, the read buffer will contain + /// those bytes. + /// + /// You will want to check for any existing bytes if you plan to continue + /// communicating on the IO object. + pub read_buf: Bytes, + /// The `Service` used to serve this connection. + pub service: S, + _inner: (), +} + +// ===== impl Http ===== + +#[cfg(any(feature = "http1", feature = "http2"))] +impl Http { + /// Creates a new instance of the HTTP protocol, ready to spawn a server or + /// start accepting connections. + pub fn new() -> Http { + Http { + exec: Exec::Default, + h1_half_close: false, + h1_keep_alive: true, + h1_title_case_headers: false, + h1_preserve_header_case: false, + #[cfg(all(feature = "http1", feature = "runtime"))] + h1_header_read_timeout: None, + h1_writev: None, + #[cfg(feature = "http2")] + h2_builder: Default::default(), + mode: ConnectionMode::default(), + max_buf_size: None, + pipeline_flush: false, + } + } +} + +#[cfg(any(feature = "http1", feature = "http2"))] +impl<E> Http<E> { + /// Sets whether HTTP1 is required. + /// + /// Default is false + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn http1_only(&mut self, val: bool) -> &mut Self { + if val { + self.mode = ConnectionMode::H1Only; + } else { + #[cfg(feature = "http2")] + { + self.mode = ConnectionMode::Fallback; + } + } + self + } + + /// Set whether HTTP/1 connections should support half-closures. + /// + /// Clients can chose to shutdown their write-side while waiting + /// for the server to respond. Setting this to `true` will + /// prevent closing the connection immediately if `read` + /// detects an EOF in the middle of a request. + /// + /// Default is `false`. + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn http1_half_close(&mut self, val: bool) -> &mut Self { + self.h1_half_close = val; + self + } + + /// Enables or disables HTTP/1 keep-alive. + /// + /// Default is true. + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn http1_keep_alive(&mut self, val: bool) -> &mut Self { + self.h1_keep_alive = val; + self + } + + /// Set whether HTTP/1 connections will write header names as title case at + /// the socket level. + /// + /// Note that this setting does not affect HTTP/2. + /// + /// Default is false. + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn http1_title_case_headers(&mut self, enabled: bool) -> &mut Self { + self.h1_title_case_headers = enabled; + self + } + + /// Set whether to support preserving original header cases. + /// + /// Currently, this will record the original cases received, and store them + /// in a private extension on the `Request`. It will also look for and use + /// such an extension in any provided `Response`. + /// + /// Since the relevant extension is still private, there is no way to + /// interact with the original cases. The only effect this can have now is + /// to forward the cases in a proxy-like fashion. + /// + /// Note that this setting does not affect HTTP/2. + /// + /// Default is false. + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn http1_preserve_header_case(&mut self, enabled: bool) -> &mut Self { + self.h1_preserve_header_case = enabled; + self + } + + /// Set a timeout for reading client request headers. If a client does not + /// transmit the entire header within this time, the connection is closed. + /// + /// Default is None. + #[cfg(all(feature = "http1", feature = "runtime"))] + #[cfg_attr(docsrs, doc(cfg(all(feature = "http1", feature = "runtime"))))] + pub fn http1_header_read_timeout(&mut self, read_timeout: Duration) -> &mut Self { + self.h1_header_read_timeout = Some(read_timeout); + self + } + + /// Set whether HTTP/1 connections should try to use vectored writes, + /// or always flatten into a single buffer. + /// + /// Note that setting this to false may mean more copies of body data, + /// but may also improve performance when an IO transport doesn't + /// support vectored writes well, such as most TLS implementations. + /// + /// Setting this to true will force hyper to use queued strategy + /// which may eliminate unnecessary cloning on some TLS backends + /// + /// Default is `auto`. In this mode hyper will try to guess which + /// mode to use + #[inline] + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn http1_writev(&mut self, val: bool) -> &mut Self { + self.h1_writev = Some(val); + self + } + + /// Sets whether HTTP2 is required. + /// + /// Default is false + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_only(&mut self, val: bool) -> &mut Self { + if val { + self.mode = ConnectionMode::H2Only; + } else { + #[cfg(feature = "http1")] + { + self.mode = ConnectionMode::Fallback; + } + } + self + } + + /// Sets the [`SETTINGS_INITIAL_WINDOW_SIZE`][spec] option for HTTP2 + /// stream-level flow control. + /// + /// Passing `None` will do nothing. + /// + /// If not set, hyper will use a default. + /// + /// [spec]: https://http2.github.io/http2-spec/#SETTINGS_INITIAL_WINDOW_SIZE + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_initial_stream_window_size(&mut self, sz: impl Into<Option<u32>>) -> &mut Self { + if let Some(sz) = sz.into() { + self.h2_builder.adaptive_window = false; + self.h2_builder.initial_stream_window_size = sz; + } + self + } + + /// Sets the max connection-level flow control for HTTP2. + /// + /// Passing `None` will do nothing. + /// + /// If not set, hyper will use a default. + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_initial_connection_window_size( + &mut self, + sz: impl Into<Option<u32>>, + ) -> &mut Self { + if let Some(sz) = sz.into() { + self.h2_builder.adaptive_window = false; + self.h2_builder.initial_conn_window_size = sz; + } + self + } + + /// Sets whether to use an adaptive flow control. + /// + /// Enabling this will override the limits set in + /// `http2_initial_stream_window_size` and + /// `http2_initial_connection_window_size`. + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_adaptive_window(&mut self, enabled: bool) -> &mut Self { + use proto::h2::SPEC_WINDOW_SIZE; + + self.h2_builder.adaptive_window = enabled; + if enabled { + self.h2_builder.initial_conn_window_size = SPEC_WINDOW_SIZE; + self.h2_builder.initial_stream_window_size = SPEC_WINDOW_SIZE; + } + self + } + + /// Sets the maximum frame size to use for HTTP2. + /// + /// Passing `None` will do nothing. + /// + /// If not set, hyper will use a default. + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_max_frame_size(&mut self, sz: impl Into<Option<u32>>) -> &mut Self { + if let Some(sz) = sz.into() { + self.h2_builder.max_frame_size = sz; + } + self + } + + /// Sets the [`SETTINGS_MAX_CONCURRENT_STREAMS`][spec] option for HTTP2 + /// connections. + /// + /// Default is no limit (`std::u32::MAX`). Passing `None` will do nothing. + /// + /// [spec]: https://http2.github.io/http2-spec/#SETTINGS_MAX_CONCURRENT_STREAMS + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_max_concurrent_streams(&mut self, max: impl Into<Option<u32>>) -> &mut Self { + self.h2_builder.max_concurrent_streams = max.into(); + self + } + + /// Sets an interval for HTTP2 Ping frames should be sent to keep a + /// connection alive. + /// + /// Pass `None` to disable HTTP2 keep-alive. + /// + /// Default is currently disabled. + /// + /// # Cargo Feature + /// + /// Requires the `runtime` cargo feature to be enabled. + #[cfg(feature = "runtime")] + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_keep_alive_interval( + &mut self, + interval: impl Into<Option<Duration>>, + ) -> &mut Self { + self.h2_builder.keep_alive_interval = interval.into(); + self + } + + /// Sets a timeout for receiving an acknowledgement of the keep-alive ping. + /// + /// If the ping is not acknowledged within the timeout, the connection will + /// be closed. Does nothing if `http2_keep_alive_interval` is disabled. + /// + /// Default is 20 seconds. + /// + /// # Cargo Feature + /// + /// Requires the `runtime` cargo feature to be enabled. + #[cfg(feature = "runtime")] + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_keep_alive_timeout(&mut self, timeout: Duration) -> &mut Self { + self.h2_builder.keep_alive_timeout = timeout; + self + } + + /// Set the maximum write buffer size for each HTTP/2 stream. + /// + /// Default is currently ~400KB, but may change. + /// + /// # Panics + /// + /// The value must be no larger than `u32::MAX`. + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_max_send_buf_size(&mut self, max: usize) -> &mut Self { + assert!(max <= std::u32::MAX as usize); + self.h2_builder.max_send_buffer_size = max; + self + } + + /// Enables the [extended CONNECT protocol]. + /// + /// [extended CONNECT protocol]: https://datatracker.ietf.org/doc/html/rfc8441#section-4 + #[cfg(feature = "http2")] + pub fn http2_enable_connect_protocol(&mut self) -> &mut Self { + self.h2_builder.enable_connect_protocol = true; + self + } + + /// Sets the max size of received header frames. + /// + /// Default is currently ~16MB, but may change. + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_max_header_list_size(&mut self, max: u32) -> &mut Self { + self.h2_builder.max_header_list_size = max; + self + } + + /// Set the maximum buffer size for the connection. + /// + /// Default is ~400kb. + /// + /// # Panics + /// + /// The minimum value allowed is 8192. This method panics if the passed `max` is less than the minimum. + #[cfg(feature = "http1")] + #[cfg_attr(docsrs, doc(cfg(feature = "http1")))] + pub fn max_buf_size(&mut self, max: usize) -> &mut Self { + assert!( + max >= proto::h1::MINIMUM_MAX_BUFFER_SIZE, + "the max_buf_size cannot be smaller than the minimum that h1 specifies." + ); + self.max_buf_size = Some(max); + self + } + + /// Aggregates flushes to better support pipelined responses. + /// + /// Experimental, may have bugs. + /// + /// Default is false. + pub fn pipeline_flush(&mut self, enabled: bool) -> &mut Self { + self.pipeline_flush = enabled; + self + } + + /// Set the executor used to spawn background tasks. + /// + /// Default uses implicit default (like `tokio::spawn`). + pub fn with_executor<E2>(self, exec: E2) -> Http<E2> { + Http { + exec, + h1_half_close: self.h1_half_close, + h1_keep_alive: self.h1_keep_alive, + h1_title_case_headers: self.h1_title_case_headers, + h1_preserve_header_case: self.h1_preserve_header_case, + #[cfg(all(feature = "http1", feature = "runtime"))] + h1_header_read_timeout: self.h1_header_read_timeout, + h1_writev: self.h1_writev, + #[cfg(feature = "http2")] + h2_builder: self.h2_builder, + mode: self.mode, + max_buf_size: self.max_buf_size, + pipeline_flush: self.pipeline_flush, + } + } + + /// Bind a connection together with a [`Service`](crate::service::Service). + /// + /// This returns a Future that must be polled in order for HTTP to be + /// driven on the connection. + /// + /// # Example + /// + /// ``` + /// # use hyper::{Body, Request, Response}; + /// # use hyper::service::Service; + /// # use hyper::server::conn::Http; + /// # use tokio::io::{AsyncRead, AsyncWrite}; + /// # async fn run<I, S>(some_io: I, some_service: S) + /// # where + /// # I: AsyncRead + AsyncWrite + Unpin + Send + 'static, + /// # S: Service<hyper::Request<Body>, Response=hyper::Response<Body>> + Send + 'static, + /// # S::Error: Into<Box<dyn std::error::Error + Send + Sync>>, + /// # S::Future: Send, + /// # { + /// let http = Http::new(); + /// let conn = http.serve_connection(some_io, some_service); + /// + /// if let Err(e) = conn.await { + /// eprintln!("server connection error: {}", e); + /// } + /// # } + /// # fn main() {} + /// ``` + pub fn serve_connection<S, I, Bd>(&self, io: I, service: S) -> Connection<I, S, E> + where + S: HttpService<Body, ResBody = Bd>, + S::Error: Into<Box<dyn StdError + Send + Sync>>, + Bd: HttpBody + 'static, + Bd::Error: Into<Box<dyn StdError + Send + Sync>>, + I: AsyncRead + AsyncWrite + Unpin, + E: ConnStreamExec<S::Future, Bd>, + { + #[cfg(feature = "http1")] + macro_rules! h1 { + () => {{ + let mut conn = proto::Conn::new(io); + if !self.h1_keep_alive { + conn.disable_keep_alive(); + } + if self.h1_half_close { + conn.set_allow_half_close(); + } + if self.h1_title_case_headers { + conn.set_title_case_headers(); + } + if self.h1_preserve_header_case { + conn.set_preserve_header_case(); + } + #[cfg(all(feature = "http1", feature = "runtime"))] + if let Some(header_read_timeout) = self.h1_header_read_timeout { + conn.set_http1_header_read_timeout(header_read_timeout); + } + if let Some(writev) = self.h1_writev { + if writev { + conn.set_write_strategy_queue(); + } else { + conn.set_write_strategy_flatten(); + } + } + conn.set_flush_pipeline(self.pipeline_flush); + if let Some(max) = self.max_buf_size { + conn.set_max_buf_size(max); + } + let sd = proto::h1::dispatch::Server::new(service); + ProtoServer::H1 { + h1: proto::h1::Dispatcher::new(sd, conn), + } + }}; + } + + let proto = match self.mode { + #[cfg(feature = "http1")] + #[cfg(not(feature = "http2"))] + ConnectionMode::H1Only => h1!(), + #[cfg(feature = "http2")] + #[cfg(feature = "http1")] + ConnectionMode::H1Only | ConnectionMode::Fallback => h1!(), + #[cfg(feature = "http2")] + ConnectionMode::H2Only => { + let rewind_io = Rewind::new(io); + let h2 = + proto::h2::Server::new(rewind_io, service, &self.h2_builder, self.exec.clone()); + ProtoServer::H2 { h2 } + } + }; + + Connection { + conn: Some(proto), + #[cfg(all(feature = "http1", feature = "http2"))] + fallback: if self.mode == ConnectionMode::Fallback { + Fallback::ToHttp2(self.h2_builder.clone(), self.exec.clone()) + } else { + Fallback::Http1Only + }, + #[cfg(not(all(feature = "http1", feature = "http2")))] + fallback: PhantomData, + } + } +} + +// ===== impl Connection ===== + +#[cfg(any(feature = "http1", feature = "http2"))] +impl<I, B, S, E> Connection<I, S, E> +where + S: HttpService<Body, ResBody = B>, + S::Error: Into<Box<dyn StdError + Send + Sync>>, + I: AsyncRead + AsyncWrite + Unpin, + B: HttpBody + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + E: ConnStreamExec<S::Future, B>, +{ + /// Start a graceful shutdown process for this connection. + /// + /// This `Connection` should continue to be polled until shutdown + /// can finish. + /// + /// # Note + /// + /// This should only be called while the `Connection` future is still + /// pending. If called after `Connection::poll` has resolved, this does + /// nothing. + pub fn graceful_shutdown(mut self: Pin<&mut Self>) { + match self.conn { + #[cfg(feature = "http1")] + Some(ProtoServer::H1 { ref mut h1, .. }) => { + h1.disable_keep_alive(); + } + #[cfg(feature = "http2")] + Some(ProtoServer::H2 { ref mut h2 }) => { + h2.graceful_shutdown(); + } + None => (), + + #[cfg(not(feature = "http1"))] + Some(ProtoServer::H1 { ref mut h1, .. }) => match h1.0 {}, + #[cfg(not(feature = "http2"))] + Some(ProtoServer::H2 { ref mut h2 }) => match h2.0 {}, + } + } + + /// Return the inner IO object, and additional information. + /// + /// If the IO object has been "rewound" the io will not contain those bytes rewound. + /// This should only be called after `poll_without_shutdown` signals + /// that the connection is "done". Otherwise, it may not have finished + /// flushing all necessary HTTP bytes. + /// + /// # Panics + /// This method will panic if this connection is using an h2 protocol. + pub fn into_parts(self) -> Parts<I, S> { + self.try_into_parts() + .unwrap_or_else(|| panic!("h2 cannot into_inner")) + } + + /// Return the inner IO object, and additional information, if available. + /// + /// This method will return a `None` if this connection is using an h2 protocol. + pub fn try_into_parts(self) -> Option<Parts<I, S>> { + match self.conn.unwrap() { + #[cfg(feature = "http1")] + ProtoServer::H1 { h1, .. } => { + let (io, read_buf, dispatch) = h1.into_inner(); + Some(Parts { + io, + read_buf, + service: dispatch.into_service(), + _inner: (), + }) + } + ProtoServer::H2 { .. } => None, + + #[cfg(not(feature = "http1"))] + ProtoServer::H1 { h1, .. } => match h1.0 {}, + } + } + + /// Poll the connection for completion, but without calling `shutdown` + /// on the underlying IO. + /// + /// This is useful to allow running a connection while doing an HTTP + /// upgrade. Once the upgrade is completed, the connection would be "done", + /// but it is not desired to actually shutdown the IO object. Instead you + /// would take it back using `into_parts`. + pub fn poll_without_shutdown(&mut self, cx: &mut task::Context<'_>) -> Poll<crate::Result<()>> + where + S: Unpin, + S::Future: Unpin, + B: Unpin, + { + loop { + match *self.conn.as_mut().unwrap() { + #[cfg(feature = "http1")] + ProtoServer::H1 { ref mut h1, .. } => match ready!(h1.poll_without_shutdown(cx)) { + Ok(()) => return Poll::Ready(Ok(())), + Err(e) => { + #[cfg(feature = "http2")] + match *e.kind() { + Kind::Parse(Parse::VersionH2) if self.fallback.to_h2() => { + self.upgrade_h2(); + continue; + } + _ => (), + } + + return Poll::Ready(Err(e)); + } + }, + #[cfg(feature = "http2")] + ProtoServer::H2 { ref mut h2 } => return Pin::new(h2).poll(cx).map_ok(|_| ()), + + #[cfg(not(feature = "http1"))] + ProtoServer::H1 { ref mut h1, .. } => match h1.0 {}, + #[cfg(not(feature = "http2"))] + ProtoServer::H2 { ref mut h2 } => match h2.0 {}, + }; + } + } + + /// Prevent shutdown of the underlying IO object at the end of service the request, + /// instead run `into_parts`. This is a convenience wrapper over `poll_without_shutdown`. + /// + /// # Error + /// + /// This errors if the underlying connection protocol is not HTTP/1. + pub fn without_shutdown(self) -> impl Future<Output = crate::Result<Parts<I, S>>> + where + S: Unpin, + S::Future: Unpin, + B: Unpin, + { + let mut conn = Some(self); + futures_util::future::poll_fn(move |cx| { + ready!(conn.as_mut().unwrap().poll_without_shutdown(cx))?; + Poll::Ready(conn.take().unwrap().try_into_parts().ok_or_else(crate::Error::new_without_shutdown_not_h1)) + }) + } + + #[cfg(all(feature = "http1", feature = "http2"))] + fn upgrade_h2(&mut self) { + trace!("Trying to upgrade connection to h2"); + let conn = self.conn.take(); + + let (io, read_buf, dispatch) = match conn.unwrap() { + ProtoServer::H1 { h1, .. } => h1.into_inner(), + ProtoServer::H2 { .. } => { + panic!("h2 cannot into_inner"); + } + }; + let mut rewind_io = Rewind::new(io); + rewind_io.rewind(read_buf); + let (builder, exec) = match self.fallback { + Fallback::ToHttp2(ref builder, ref exec) => (builder, exec), + Fallback::Http1Only => unreachable!("upgrade_h2 with Fallback::Http1Only"), + }; + let h2 = proto::h2::Server::new(rewind_io, dispatch.into_service(), builder, exec.clone()); + + debug_assert!(self.conn.is_none()); + self.conn = Some(ProtoServer::H2 { h2 }); + } + + /// Enable this connection to support higher-level HTTP upgrades. + /// + /// See [the `upgrade` module](crate::upgrade) for more. + pub fn with_upgrades(self) -> UpgradeableConnection<I, S, E> + where + I: Send, + { + UpgradeableConnection { inner: self } + } +} + +#[cfg(any(feature = "http1", feature = "http2"))] +impl<I, B, S, E> Future for Connection<I, S, E> +where + S: HttpService<Body, ResBody = B>, + S::Error: Into<Box<dyn StdError + Send + Sync>>, + I: AsyncRead + AsyncWrite + Unpin + 'static, + B: HttpBody + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + E: ConnStreamExec<S::Future, B>, +{ + type Output = crate::Result<()>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> { + loop { + match ready!(Pin::new(self.conn.as_mut().unwrap()).poll(cx)) { + Ok(done) => { + match done { + proto::Dispatched::Shutdown => {} + #[cfg(feature = "http1")] + proto::Dispatched::Upgrade(pending) => { + // With no `Send` bound on `I`, we can't try to do + // upgrades here. In case a user was trying to use + // `Body::on_upgrade` with this API, send a special + // error letting them know about that. + pending.manual(); + } + }; + return Poll::Ready(Ok(())); + } + Err(e) => { + #[cfg(feature = "http1")] + #[cfg(feature = "http2")] + match *e.kind() { + Kind::Parse(Parse::VersionH2) if self.fallback.to_h2() => { + self.upgrade_h2(); + continue; + } + _ => (), + } + + return Poll::Ready(Err(e)); + } + } + } + } +} + +#[cfg(any(feature = "http1", feature = "http2"))] +impl<I, S> fmt::Debug for Connection<I, S> +where + S: HttpService<Body>, +{ + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Connection").finish() + } +} + +// ===== impl ConnectionMode ===== + +#[cfg(any(feature = "http1", feature = "http2"))] +impl Default for ConnectionMode { + #[cfg(all(feature = "http1", feature = "http2"))] + fn default() -> ConnectionMode { + ConnectionMode::Fallback + } + + #[cfg(all(feature = "http1", not(feature = "http2")))] + fn default() -> ConnectionMode { + ConnectionMode::H1Only + } + + #[cfg(all(not(feature = "http1"), feature = "http2"))] + fn default() -> ConnectionMode { + ConnectionMode::H2Only + } +} + +// ===== impl ProtoServer ===== + +#[cfg(any(feature = "http1", feature = "http2"))] +impl<T, B, S, E> Future for ProtoServer<T, B, S, E> +where + T: AsyncRead + AsyncWrite + Unpin, + S: HttpService<Body, ResBody = B>, + S::Error: Into<Box<dyn StdError + Send + Sync>>, + B: HttpBody + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + E: ConnStreamExec<S::Future, B>, +{ + type Output = crate::Result<proto::Dispatched>; + + fn poll(self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> { + match self.project() { + #[cfg(feature = "http1")] + ProtoServerProj::H1 { h1, .. } => h1.poll(cx), + #[cfg(feature = "http2")] + ProtoServerProj::H2 { h2 } => h2.poll(cx), + + #[cfg(not(feature = "http1"))] + ProtoServerProj::H1 { h1, .. } => match h1.0 {}, + #[cfg(not(feature = "http2"))] + ProtoServerProj::H2 { h2 } => match h2.0 {}, + } + } +} + +#[cfg(any(feature = "http1", feature = "http2"))] +mod upgrades { + use super::*; + + // A future binding a connection with a Service with Upgrade support. + // + // This type is unnameable outside the crate, and so basically just an + // `impl Future`, without requiring Rust 1.26. + #[must_use = "futures do nothing unless polled"] + #[allow(missing_debug_implementations)] + pub struct UpgradeableConnection<T, S, E> + where + S: HttpService<Body>, + { + pub(super) inner: Connection<T, S, E>, + } + + impl<I, B, S, E> UpgradeableConnection<I, S, E> + where + S: HttpService<Body, ResBody = B>, + S::Error: Into<Box<dyn StdError + Send + Sync>>, + I: AsyncRead + AsyncWrite + Unpin, + B: HttpBody + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + E: ConnStreamExec<S::Future, B>, + { + /// Start a graceful shutdown process for this connection. + /// + /// This `Connection` should continue to be polled until shutdown + /// can finish. + pub fn graceful_shutdown(mut self: Pin<&mut Self>) { + Pin::new(&mut self.inner).graceful_shutdown() + } + } + + impl<I, B, S, E> Future for UpgradeableConnection<I, S, E> + where + S: HttpService<Body, ResBody = B>, + S::Error: Into<Box<dyn StdError + Send + Sync>>, + I: AsyncRead + AsyncWrite + Unpin + Send + 'static, + B: HttpBody + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + E: ConnStreamExec<S::Future, B>, + { + type Output = crate::Result<()>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> { + loop { + match ready!(Pin::new(self.inner.conn.as_mut().unwrap()).poll(cx)) { + Ok(proto::Dispatched::Shutdown) => return Poll::Ready(Ok(())), + #[cfg(feature = "http1")] + Ok(proto::Dispatched::Upgrade(pending)) => { + match self.inner.conn.take() { + Some(ProtoServer::H1 { h1, .. }) => { + let (io, buf, _) = h1.into_inner(); + pending.fulfill(Upgraded::new(io, buf)); + return Poll::Ready(Ok(())); + } + _ => { + drop(pending); + unreachable!("Upgrade expects h1") + } + }; + } + Err(e) => { + #[cfg(feature = "http1")] + #[cfg(feature = "http2")] + match *e.kind() { + Kind::Parse(Parse::VersionH2) if self.inner.fallback.to_h2() => { + self.inner.upgrade_h2(); + continue; + } + _ => (), + } + + return Poll::Ready(Err(e)); + } + } + } + } + } +} |