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Diffstat (limited to 'third_party/rust/hyper/src/client/conn.rs')
| -rw-r--r-- | third_party/rust/hyper/src/client/conn.rs | 1113 |
1 files changed, 1113 insertions, 0 deletions
diff --git a/third_party/rust/hyper/src/client/conn.rs b/third_party/rust/hyper/src/client/conn.rs new file mode 100644 index 0000000000..3eb12b4204 --- /dev/null +++ b/third_party/rust/hyper/src/client/conn.rs @@ -0,0 +1,1113 @@ +//! Lower-level client connection API. +//! +//! The types in this module are to provide a lower-level API based around a +//! single connection. Connecting to a host, pooling connections, and the like +//! are not handled at this level. This module provides the building blocks to +//! customize those things externally. +//! +//! If don't have need to manage connections yourself, consider using the +//! higher-level [Client](super) API. +//! +//! ## Example +//! A simple example that uses the `SendRequest` struct to talk HTTP over a Tokio TCP stream +//! ```no_run +//! # #[cfg(all(feature = "client", feature = "http1", feature = "runtime"))] +//! # mod rt { +//! use tower::ServiceExt; +//! use http::{Request, StatusCode}; +//! use hyper::{client::conn, Body}; +//! use tokio::net::TcpStream; +//! +//! #[tokio::main] +//! async fn main() -> Result<(), Box<dyn std::error::Error>> { +//! let target_stream = TcpStream::connect("example.com:80").await?; +//! +//! let (mut request_sender, connection) = conn::handshake(target_stream).await?; +//! +//! // spawn a task to poll the connection and drive the HTTP state +//! tokio::spawn(async move { +//! if let Err(e) = connection.await { +//! eprintln!("Error in connection: {}", e); +//! } +//! }); +//! +//! let request = Request::builder() +//! // We need to manually add the host header because SendRequest does not +//! .header("Host", "example.com") +//! .method("GET") +//! .body(Body::from(""))?; +//! let response = request_sender.send_request(request).await?; +//! assert!(response.status() == StatusCode::OK); +//! +//! // To send via the same connection again, it may not work as it may not be ready, +//! // so we have to wait until the request_sender becomes ready. +//! request_sender.ready().await?; +//! let request = Request::builder() +//! .header("Host", "example.com") +//! .method("GET") +//! .body(Body::from(""))?; +//! let response = request_sender.send_request(request).await?; +//! assert!(response.status() == StatusCode::OK); +//! Ok(()) +//! } +//! +//! # } +//! ``` + +use std::error::Error as StdError; +use std::fmt; +#[cfg(not(all(feature = "http1", feature = "http2")))] +use std::marker::PhantomData; +use std::sync::Arc; +#[cfg(all(feature = "runtime", feature = "http2"))] +use std::time::Duration; + +use bytes::Bytes; +use futures_util::future::{self, Either, FutureExt as _}; +use httparse::ParserConfig; +use pin_project_lite::pin_project; +use tokio::io::{AsyncRead, AsyncWrite}; +use tower_service::Service; +use tracing::{debug, trace}; + +use super::dispatch; +use crate::body::HttpBody; +#[cfg(not(all(feature = "http1", feature = "http2")))] +use crate::common::Never; +use crate::common::{ + exec::{BoxSendFuture, Exec}, + task, Future, Pin, Poll, +}; +use crate::proto; +use crate::rt::Executor; +#[cfg(feature = "http1")] +use crate::upgrade::Upgraded; +use crate::{Body, Request, Response}; + +#[cfg(feature = "http1")] +type Http1Dispatcher<T, B> = + proto::dispatch::Dispatcher<proto::dispatch::Client<B>, B, T, proto::h1::ClientTransaction>; + +#[cfg(not(feature = "http1"))] +type Http1Dispatcher<T, B> = (Never, PhantomData<(T, Pin<Box<B>>)>); + +#[cfg(feature = "http2")] +type Http2ClientTask<B> = proto::h2::ClientTask<B>; + +#[cfg(not(feature = "http2"))] +type Http2ClientTask<B> = (Never, PhantomData<Pin<Box<B>>>); + +pin_project! { + #[project = ProtoClientProj] + enum ProtoClient<T, B> + where + B: HttpBody, + { + H1 { + #[pin] + h1: Http1Dispatcher<T, B>, + }, + H2 { + #[pin] + h2: Http2ClientTask<B>, + }, + } +} + +/// Returns a handshake future over some IO. +/// +/// This is a shortcut for `Builder::new().handshake(io)`. +/// See [`client::conn`](crate::client::conn) for more. +pub async fn handshake<T>( + io: T, +) -> crate::Result<(SendRequest<crate::Body>, Connection<T, crate::Body>)> +where + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, +{ + Builder::new().handshake(io).await +} + +/// The sender side of an established connection. +pub struct SendRequest<B> { + dispatch: dispatch::Sender<Request<B>, Response<Body>>, +} + +/// A future that processes all HTTP state for the IO object. +/// +/// In most cases, this should just be spawned into an executor, so that it +/// can process incoming and outgoing messages, notice hangups, and the like. +#[must_use = "futures do nothing unless polled"] +pub struct Connection<T, B> +where + T: AsyncRead + AsyncWrite + Send + 'static, + B: HttpBody + 'static, +{ + inner: Option<ProtoClient<T, B>>, +} + +/// A builder to configure an HTTP connection. +/// +/// After setting options, the builder is used to create a handshake future. +#[derive(Clone, Debug)] +pub struct Builder { + pub(super) exec: Exec, + h09_responses: bool, + h1_parser_config: ParserConfig, + h1_writev: Option<bool>, + h1_title_case_headers: bool, + h1_preserve_header_case: bool, + #[cfg(feature = "ffi")] + h1_preserve_header_order: bool, + h1_read_buf_exact_size: Option<usize>, + h1_max_buf_size: Option<usize>, + #[cfg(feature = "ffi")] + h1_headers_raw: bool, + #[cfg(feature = "http2")] + h2_builder: proto::h2::client::Config, + version: Proto, +} + +#[derive(Clone, Debug)] +enum Proto { + #[cfg(feature = "http1")] + Http1, + #[cfg(feature = "http2")] + Http2, +} + +/// A future returned by `SendRequest::send_request`. +/// +/// Yields a `Response` if successful. +#[must_use = "futures do nothing unless polled"] +pub struct ResponseFuture { + inner: ResponseFutureState, +} + +enum ResponseFutureState { + Waiting(dispatch::Promise<Response<Body>>), + // Option is to be able to `take()` it in `poll` + Error(Option<crate::Error>), +} + +/// 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)] +pub struct Parts<T> { + /// The original IO object used in the handshake. + pub io: T, + /// A buffer of bytes that have been read but not processed as HTTP. + /// + /// For instance, if the `Connection` is used for an HTTP upgrade request, + /// it is possible the server sent back the first bytes of the new protocol + /// along with the response upgrade. + /// + /// You will want to check for any existing bytes if you plan to continue + /// communicating on the IO object. + pub read_buf: Bytes, + _inner: (), +} + +// ========== internal client api + +// A `SendRequest` that can be cloned to send HTTP2 requests. +// private for now, probably not a great idea of a type... +#[must_use = "futures do nothing unless polled"] +#[cfg(feature = "http2")] +pub(super) struct Http2SendRequest<B> { + dispatch: dispatch::UnboundedSender<Request<B>, Response<Body>>, +} + +// ===== impl SendRequest + +impl<B> SendRequest<B> { + /// Polls to determine whether this sender can be used yet for a request. + /// + /// If the associated connection is closed, this returns an Error. + pub fn poll_ready(&mut self, cx: &mut task::Context<'_>) -> Poll<crate::Result<()>> { + self.dispatch.poll_ready(cx) + } + + pub(super) async fn when_ready(self) -> crate::Result<Self> { + let mut me = Some(self); + future::poll_fn(move |cx| { + ready!(me.as_mut().unwrap().poll_ready(cx))?; + Poll::Ready(Ok(me.take().unwrap())) + }) + .await + } + + pub(super) fn is_ready(&self) -> bool { + self.dispatch.is_ready() + } + + pub(super) fn is_closed(&self) -> bool { + self.dispatch.is_closed() + } + + #[cfg(feature = "http2")] + pub(super) fn into_http2(self) -> Http2SendRequest<B> { + Http2SendRequest { + dispatch: self.dispatch.unbound(), + } + } +} + +impl<B> SendRequest<B> +where + B: HttpBody + 'static, +{ + /// Sends a `Request` on the associated connection. + /// + /// Returns a future that if successful, yields the `Response`. + /// + /// # Note + /// + /// There are some key differences in what automatic things the `Client` + /// does for you that will not be done here: + /// + /// - `Client` requires absolute-form `Uri`s, since the scheme and + /// authority are needed to connect. They aren't required here. + /// - Since the `Client` requires absolute-form `Uri`s, it can add + /// the `Host` header based on it. You must add a `Host` header yourself + /// before calling this method. + /// - Since absolute-form `Uri`s are not required, if received, they will + /// be serialized as-is. + /// + /// # Example + /// + /// ``` + /// # use http::header::HOST; + /// # use hyper::client::conn::SendRequest; + /// # use hyper::Body; + /// use hyper::Request; + /// + /// # async fn doc(mut tx: SendRequest<Body>) -> hyper::Result<()> { + /// // build a Request + /// let req = Request::builder() + /// .uri("/foo/bar") + /// .header(HOST, "hyper.rs") + /// .body(Body::empty()) + /// .unwrap(); + /// + /// // send it and await a Response + /// let res = tx.send_request(req).await?; + /// // assert the Response + /// assert!(res.status().is_success()); + /// # Ok(()) + /// # } + /// # fn main() {} + /// ``` + pub fn send_request(&mut self, req: Request<B>) -> ResponseFuture { + let inner = match self.dispatch.send(req) { + Ok(rx) => ResponseFutureState::Waiting(rx), + Err(_req) => { + debug!("connection was not ready"); + let err = crate::Error::new_canceled().with("connection was not ready"); + ResponseFutureState::Error(Some(err)) + } + }; + + ResponseFuture { inner } + } + + pub(super) fn send_request_retryable( + &mut self, + req: Request<B>, + ) -> impl Future<Output = Result<Response<Body>, (crate::Error, Option<Request<B>>)>> + Unpin + where + B: Send, + { + match self.dispatch.try_send(req) { + Ok(rx) => { + Either::Left(rx.then(move |res| { + match res { + Ok(Ok(res)) => future::ok(res), + Ok(Err(err)) => future::err(err), + // this is definite bug if it happens, but it shouldn't happen! + Err(_) => panic!("dispatch dropped without returning error"), + } + })) + } + Err(req) => { + debug!("connection was not ready"); + let err = crate::Error::new_canceled().with("connection was not ready"); + Either::Right(future::err((err, Some(req)))) + } + } + } +} + +impl<B> Service<Request<B>> for SendRequest<B> +where + B: HttpBody + 'static, +{ + type Response = Response<Body>; + type Error = crate::Error; + type Future = ResponseFuture; + + fn poll_ready(&mut self, cx: &mut task::Context<'_>) -> Poll<Result<(), Self::Error>> { + self.poll_ready(cx) + } + + fn call(&mut self, req: Request<B>) -> Self::Future { + self.send_request(req) + } +} + +impl<B> fmt::Debug for SendRequest<B> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("SendRequest").finish() + } +} + +// ===== impl Http2SendRequest + +#[cfg(feature = "http2")] +impl<B> Http2SendRequest<B> { + pub(super) fn is_ready(&self) -> bool { + self.dispatch.is_ready() + } + + pub(super) fn is_closed(&self) -> bool { + self.dispatch.is_closed() + } +} + +#[cfg(feature = "http2")] +impl<B> Http2SendRequest<B> +where + B: HttpBody + 'static, +{ + pub(super) fn send_request_retryable( + &mut self, + req: Request<B>, + ) -> impl Future<Output = Result<Response<Body>, (crate::Error, Option<Request<B>>)>> + where + B: Send, + { + match self.dispatch.try_send(req) { + Ok(rx) => { + Either::Left(rx.then(move |res| { + match res { + Ok(Ok(res)) => future::ok(res), + Ok(Err(err)) => future::err(err), + // this is definite bug if it happens, but it shouldn't happen! + Err(_) => panic!("dispatch dropped without returning error"), + } + })) + } + Err(req) => { + debug!("connection was not ready"); + let err = crate::Error::new_canceled().with("connection was not ready"); + Either::Right(future::err((err, Some(req)))) + } + } + } +} + +#[cfg(feature = "http2")] +impl<B> fmt::Debug for Http2SendRequest<B> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Http2SendRequest").finish() + } +} + +#[cfg(feature = "http2")] +impl<B> Clone for Http2SendRequest<B> { + fn clone(&self) -> Self { + Http2SendRequest { + dispatch: self.dispatch.clone(), + } + } +} + +// ===== impl Connection + +impl<T, B> Connection<T, B> +where + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, + B: HttpBody + Unpin + Send + 'static, + B::Data: Send, + B::Error: Into<Box<dyn StdError + Send + Sync>>, +{ + /// Return the inner IO object, and additional information. + /// + /// Only works for HTTP/1 connections. HTTP/2 connections will panic. + pub fn into_parts(self) -> Parts<T> { + match self.inner.expect("already upgraded") { + #[cfg(feature = "http1")] + ProtoClient::H1 { h1 } => { + let (io, read_buf, _) = h1.into_inner(); + Parts { + io, + read_buf, + _inner: (), + } + } + ProtoClient::H2 { .. } => { + panic!("http2 cannot into_inner"); + } + + #[cfg(not(feature = "http1"))] + ProtoClient::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`. + /// + /// Use [`poll_fn`](https://docs.rs/futures/0.1.25/futures/future/fn.poll_fn.html) + /// and [`try_ready!`](https://docs.rs/futures/0.1.25/futures/macro.try_ready.html) + /// to work with this function; or use the `without_shutdown` wrapper. + pub fn poll_without_shutdown(&mut self, cx: &mut task::Context<'_>) -> Poll<crate::Result<()>> { + match *self.inner.as_mut().expect("already upgraded") { + #[cfg(feature = "http1")] + ProtoClient::H1 { ref mut h1 } => h1.poll_without_shutdown(cx), + #[cfg(feature = "http2")] + ProtoClient::H2 { ref mut h2, .. } => Pin::new(h2).poll(cx).map_ok(|_| ()), + + #[cfg(not(feature = "http1"))] + ProtoClient::H1 { ref mut h1 } => match h1.0 {}, + #[cfg(not(feature = "http2"))] + ProtoClient::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`. + pub fn without_shutdown(self) -> impl Future<Output = crate::Result<Parts<T>>> { + let mut conn = Some(self); + future::poll_fn(move |cx| -> Poll<crate::Result<Parts<T>>> { + ready!(conn.as_mut().unwrap().poll_without_shutdown(cx))?; + Poll::Ready(Ok(conn.take().unwrap().into_parts())) + }) + } + + /// Returns whether the [extended CONNECT protocol][1] is enabled or not. + /// + /// This setting is configured by the server peer by sending the + /// [`SETTINGS_ENABLE_CONNECT_PROTOCOL` parameter][2] in a `SETTINGS` frame. + /// This method returns the currently acknowledged value received from the + /// remote. + /// + /// [1]: https://datatracker.ietf.org/doc/html/rfc8441#section-4 + /// [2]: https://datatracker.ietf.org/doc/html/rfc8441#section-3 + #[cfg(feature = "http2")] + pub fn http2_is_extended_connect_protocol_enabled(&self) -> bool { + match self.inner.as_ref().unwrap() { + ProtoClient::H1 { .. } => false, + ProtoClient::H2 { h2 } => h2.is_extended_connect_protocol_enabled(), + } + } +} + +impl<T, B> Future for Connection<T, B> +where + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, + B: HttpBody + Send + 'static, + B::Data: Send, + B::Error: Into<Box<dyn StdError + Send + Sync>>, +{ + type Output = crate::Result<()>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> { + match ready!(Pin::new(self.inner.as_mut().unwrap()).poll(cx))? { + proto::Dispatched::Shutdown => Poll::Ready(Ok(())), + #[cfg(feature = "http1")] + proto::Dispatched::Upgrade(pending) => match self.inner.take() { + Some(ProtoClient::H1 { h1 }) => { + let (io, buf, _) = h1.into_inner(); + pending.fulfill(Upgraded::new(io, buf)); + Poll::Ready(Ok(())) + } + _ => { + drop(pending); + unreachable!("Upgrade expects h1"); + } + }, + } + } +} + +impl<T, B> fmt::Debug for Connection<T, B> +where + T: AsyncRead + AsyncWrite + fmt::Debug + Send + 'static, + B: HttpBody + 'static, +{ + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Connection").finish() + } +} + +// ===== impl Builder + +impl Builder { + /// Creates a new connection builder. + #[inline] + pub fn new() -> Builder { + Builder { + exec: Exec::Default, + h09_responses: false, + h1_writev: None, + h1_read_buf_exact_size: None, + h1_parser_config: Default::default(), + h1_title_case_headers: false, + h1_preserve_header_case: false, + #[cfg(feature = "ffi")] + h1_preserve_header_order: false, + h1_max_buf_size: None, + #[cfg(feature = "ffi")] + h1_headers_raw: false, + #[cfg(feature = "http2")] + h2_builder: Default::default(), + #[cfg(feature = "http1")] + version: Proto::Http1, + #[cfg(not(feature = "http1"))] + version: Proto::Http2, + } + } + + /// Provide an executor to execute background HTTP2 tasks. + pub fn executor<E>(&mut self, exec: E) -> &mut Builder + where + E: Executor<BoxSendFuture> + Send + Sync + 'static, + { + self.exec = Exec::Executor(Arc::new(exec)); + self + } + + /// Set whether HTTP/0.9 responses should be tolerated. + /// + /// Default is false. + pub fn http09_responses(&mut self, enabled: bool) -> &mut Builder { + self.h09_responses = enabled; + self + } + + /// Set whether HTTP/1 connections will accept spaces between header names + /// and the colon that follow them in responses. + /// + /// You probably don't need this, here is what [RFC 7230 Section 3.2.4.] has + /// to say about it: + /// + /// > No whitespace is allowed between the header field-name and colon. In + /// > the past, differences in the handling of such whitespace have led to + /// > security vulnerabilities in request routing and response handling. A + /// > server MUST reject any received request message that contains + /// > whitespace between a header field-name and colon with a response code + /// > of 400 (Bad Request). A proxy MUST remove any such whitespace from a + /// > response message before forwarding the message downstream. + /// + /// Note that this setting does not affect HTTP/2. + /// + /// Default is false. + /// + /// [RFC 7230 Section 3.2.4.]: https://tools.ietf.org/html/rfc7230#section-3.2.4 + pub fn http1_allow_spaces_after_header_name_in_responses( + &mut self, + enabled: bool, + ) -> &mut Builder { + self.h1_parser_config + .allow_spaces_after_header_name_in_responses(enabled); + self + } + + /// Set whether HTTP/1 connections will accept obsolete line folding for + /// header values. + /// + /// Newline codepoints (`\r` and `\n`) will be transformed to spaces when + /// parsing. + /// + /// You probably don't need this, here is what [RFC 7230 Section 3.2.4.] has + /// to say about it: + /// + /// > A server that receives an obs-fold in a request message that is not + /// > within a message/http container MUST either reject the message by + /// > sending a 400 (Bad Request), preferably with a representation + /// > explaining that obsolete line folding is unacceptable, or replace + /// > each received obs-fold with one or more SP octets prior to + /// > interpreting the field value or forwarding the message downstream. + /// + /// > A proxy or gateway that receives an obs-fold in a response message + /// > that is not within a message/http container MUST either discard the + /// > message and replace it with a 502 (Bad Gateway) response, preferably + /// > with a representation explaining that unacceptable line folding was + /// > received, or replace each received obs-fold with one or more SP + /// > octets prior to interpreting the field value or forwarding the + /// > message downstream. + /// + /// > A user agent that receives an obs-fold in a response message that is + /// > not within a message/http container MUST replace each received + /// > obs-fold with one or more SP octets prior to interpreting the field + /// > value. + /// + /// Note that this setting does not affect HTTP/2. + /// + /// Default is false. + /// + /// [RFC 7230 Section 3.2.4.]: https://tools.ietf.org/html/rfc7230#section-3.2.4 + pub fn http1_allow_obsolete_multiline_headers_in_responses( + &mut self, + enabled: bool, + ) -> &mut Builder { + self.h1_parser_config + .allow_obsolete_multiline_headers_in_responses(enabled); + self + } + + /// Set whether HTTP/1 connections will silently ignored malformed header lines. + /// + /// If this is enabled and and a header line does not start with a valid header + /// name, or does not include a colon at all, the line will be silently ignored + /// and no error will be reported. + /// + /// Note that this setting does not affect HTTP/2. + /// + /// Default is false. + pub fn http1_ignore_invalid_headers_in_responses( + &mut self, + enabled: bool, + ) -> &mut Builder { + self.h1_parser_config + .ignore_invalid_headers_in_responses(enabled); + 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 + pub fn http1_writev(&mut self, enabled: bool) -> &mut Builder { + self.h1_writev = Some(enabled); + 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. + pub fn http1_title_case_headers(&mut self, enabled: bool) -> &mut Builder { + 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 `Response`. It will also look for and use + /// such an extension in any provided `Request`. + /// + /// 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. + pub fn http1_preserve_header_case(&mut self, enabled: bool) -> &mut Builder { + self.h1_preserve_header_case = enabled; + self + } + + /// Set whether to support preserving original header order. + /// + /// Currently, this will record the order in which headers are received, and store this + /// ordering in a private extension on the `Response`. It will also look for and use + /// such an extension in any provided `Request`. + /// + /// Note that this setting does not affect HTTP/2. + /// + /// Default is false. + #[cfg(feature = "ffi")] + pub fn http1_preserve_header_order(&mut self, enabled: bool) -> &mut Builder { + self.h1_preserve_header_order = enabled; + self + } + + /// Sets the exact size of the read buffer to *always* use. + /// + /// Note that setting this option unsets the `http1_max_buf_size` option. + /// + /// Default is an adaptive read buffer. + pub fn http1_read_buf_exact_size(&mut self, sz: Option<usize>) -> &mut Builder { + self.h1_read_buf_exact_size = sz; + self.h1_max_buf_size = None; + self + } + + /// Set the maximum buffer size for the connection. + /// + /// Default is ~400kb. + /// + /// Note that setting this option unsets the `http1_read_exact_buf_size` option. + /// + /// # 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 http1_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.h1_max_buf_size = Some(max); + self.h1_read_buf_exact_size = None; + self + } + + #[cfg(feature = "ffi")] + pub(crate) fn http1_headers_raw(&mut self, enabled: bool) -> &mut Self { + self.h1_headers_raw = enabled; + 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, enabled: bool) -> &mut Builder { + if enabled { + self.version = Proto::Http2 + } + 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 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 + } + + /// Sets whether HTTP2 keep-alive should apply while the connection is idle. + /// + /// If disabled, keep-alive pings are only sent while there are open + /// request/responses streams. If enabled, pings are also sent when no + /// streams are active. Does nothing if `http2_keep_alive_interval` is + /// disabled. + /// + /// Default is `false`. + /// + /// # 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_while_idle(&mut self, enabled: bool) -> &mut Self { + self.h2_builder.keep_alive_while_idle = enabled; + self + } + + /// Sets the maximum number of HTTP2 concurrent locally reset streams. + /// + /// See the documentation of [`h2::client::Builder::max_concurrent_reset_streams`] for more + /// details. + /// + /// The default value is determined by the `h2` crate. + /// + /// [`h2::client::Builder::max_concurrent_reset_streams`]: https://docs.rs/h2/client/struct.Builder.html#method.max_concurrent_reset_streams + #[cfg(feature = "http2")] + #[cfg_attr(docsrs, doc(cfg(feature = "http2")))] + pub fn http2_max_concurrent_reset_streams(&mut self, max: usize) -> &mut Self { + self.h2_builder.max_concurrent_reset_streams = Some(max); + self + } + + /// Set the maximum write buffer size for each HTTP/2 stream. + /// + /// Default is currently 1MB, 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 + } + + /// Constructs a connection with the configured options and IO. + /// See [`client::conn`](crate::client::conn) for more. + /// + /// Note, if [`Connection`] is not `await`-ed, [`SendRequest`] will + /// do nothing. + pub fn handshake<T, B>( + &self, + io: T, + ) -> impl Future<Output = crate::Result<(SendRequest<B>, Connection<T, B>)>> + where + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, + B: HttpBody + 'static, + B::Data: Send, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + { + let opts = self.clone(); + + async move { + trace!("client handshake {:?}", opts.version); + + let (tx, rx) = dispatch::channel(); + let proto = match opts.version { + #[cfg(feature = "http1")] + Proto::Http1 => { + let mut conn = proto::Conn::new(io); + conn.set_h1_parser_config(opts.h1_parser_config); + if let Some(writev) = opts.h1_writev { + if writev { + conn.set_write_strategy_queue(); + } else { + conn.set_write_strategy_flatten(); + } + } + if opts.h1_title_case_headers { + conn.set_title_case_headers(); + } + if opts.h1_preserve_header_case { + conn.set_preserve_header_case(); + } + #[cfg(feature = "ffi")] + if opts.h1_preserve_header_order { + conn.set_preserve_header_order(); + } + if opts.h09_responses { + conn.set_h09_responses(); + } + + #[cfg(feature = "ffi")] + conn.set_raw_headers(opts.h1_headers_raw); + + if let Some(sz) = opts.h1_read_buf_exact_size { + conn.set_read_buf_exact_size(sz); + } + if let Some(max) = opts.h1_max_buf_size { + conn.set_max_buf_size(max); + } + let cd = proto::h1::dispatch::Client::new(rx); + let dispatch = proto::h1::Dispatcher::new(cd, conn); + ProtoClient::H1 { h1: dispatch } + } + #[cfg(feature = "http2")] + Proto::Http2 => { + let h2 = + proto::h2::client::handshake(io, rx, &opts.h2_builder, opts.exec.clone()) + .await?; + ProtoClient::H2 { h2 } + } + }; + + Ok(( + SendRequest { dispatch: tx }, + Connection { inner: Some(proto) }, + )) + } + } +} + +// ===== impl ResponseFuture + +impl Future for ResponseFuture { + type Output = crate::Result<Response<Body>>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> { + match self.inner { + ResponseFutureState::Waiting(ref mut rx) => { + Pin::new(rx).poll(cx).map(|res| match res { + Ok(Ok(resp)) => Ok(resp), + Ok(Err(err)) => Err(err), + // this is definite bug if it happens, but it shouldn't happen! + Err(_canceled) => panic!("dispatch dropped without returning error"), + }) + } + ResponseFutureState::Error(ref mut err) => { + Poll::Ready(Err(err.take().expect("polled after ready"))) + } + } + } +} + +impl fmt::Debug for ResponseFuture { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("ResponseFuture").finish() + } +} + +// ===== impl ProtoClient + +impl<T, B> Future for ProtoClient<T, B> +where + T: AsyncRead + AsyncWrite + Send + Unpin + 'static, + B: HttpBody + Send + 'static, + B::Data: Send, + B::Error: Into<Box<dyn StdError + Send + Sync>>, +{ + 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")] + ProtoClientProj::H1 { h1 } => h1.poll(cx), + #[cfg(feature = "http2")] + ProtoClientProj::H2 { h2, .. } => h2.poll(cx), + + #[cfg(not(feature = "http1"))] + ProtoClientProj::H1 { h1 } => match h1.0 {}, + #[cfg(not(feature = "http2"))] + ProtoClientProj::H2 { h2, .. } => match h2.0 {}, + } + } +} + +// assert trait markers + +trait AssertSend: Send {} +trait AssertSendSync: Send + Sync {} + +#[doc(hidden)] +impl<B: Send> AssertSendSync for SendRequest<B> {} + +#[doc(hidden)] +impl<T: Send, B: Send> AssertSend for Connection<T, B> +where + T: AsyncRead + AsyncWrite + Send + 'static, + B: HttpBody + 'static, + B::Data: Send, +{ +} + +#[doc(hidden)] +impl<T: Send + Sync, B: Send + Sync> AssertSendSync for Connection<T, B> +where + T: AsyncRead + AsyncWrite + Send + 'static, + B: HttpBody + 'static, + B::Data: Send + Sync + 'static, +{ +} + +#[doc(hidden)] +impl AssertSendSync for Builder {} + +#[doc(hidden)] +impl AssertSend for ResponseFuture {} |