Quelle conn.rs Sprache: unbekannt

Spracherkennung für: .rs vermutete Sprache: Unknown {[0] [0] [0]} [Methode: Schwerpunktbildung, einfache Gewichte, sechs Dimensionen]

//! 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, T, proto::h1::ClientTransaction>;

#[cfg(not(feature = "http1"))]
type Http1Dispatcher<T, B> = (Never, PhantomData<(T, Pin<Box>)>);

#[cfg(feature = "http2")]
type Http2ClientTask = proto::h2::ClientTask;

#[cfg(not(feature = "http2"))]
type Http2ClientTask = (Never, PhantomData<Pin<Box>>);

pin_project! {
 #[project = ProtoClientProj]
 enum ProtoClient<T, B>
 where
 B: HttpBody,
 {
 H1 {
 #[pin]
 h1: Http1Dispatcher<T, B>,
 },
 H2 {
 #[pin]
 h2: Http2ClientTask,
 },
 }
}

/// 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 {
 dispatch: dispatch::Sender<Request, 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 {
 dispatch: dispatch::UnboundedSender<Request, Response<Body>>,
}

// ===== impl SendRequest

impl SendRequest {
 /// 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 {
 Http2SendRequest {
 dispatch: self.dispatch.unbound(),
 }
 }
}

impl SendRequest
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) -> 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,
 ) -> impl Future<Output = Result<Response<Body>, (crate::Error, Option<Request>)>> + 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 Service<Request> for SendRequest
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) -> Self::Future {
 self.send_request(req)
 }
}

impl fmt::Debug for SendRequest {
 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 f.debug_struct("SendRequest").finish()
 }
}

// ===== impl Http2SendRequest

#[cfg(feature = "http2")]
impl Http2SendRequest {
 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 Http2SendRequest
where
 B: HttpBody + 'static,
{
 pub(super) fn send_request_retryable(
 &mut self,
 req: Request,
 ) -> impl Future<Output = Result<Response<Body>, (crate::Error, Option<Request>)>>
 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 fmt::Debug for Http2SendRequest {
 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 f.debug_struct("Http2SendRequest").finish()
 }
}

#[cfg(feature = "http2")]
impl Clone for Http2SendRequest {
 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, 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 {}

#[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 {}

Quelle conn.rs Sprache: unbekannt

[ Dauer der Verarbeitung: 0.46 Sekunden ]