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Diffstat (limited to 'vendor/hyper/src/client/conn/http1.rs')
| -rw-r--r-- | vendor/hyper/src/client/conn/http1.rs | 611 |
1 files changed, 611 insertions, 0 deletions
diff --git a/vendor/hyper/src/client/conn/http1.rs b/vendor/hyper/src/client/conn/http1.rs new file mode 100644 index 00000000..ecfe6eb8 --- /dev/null +++ b/vendor/hyper/src/client/conn/http1.rs @@ -0,0 +1,611 @@ +//! HTTP/1 client connections + +use std::error::Error as StdError; +use std::fmt; +use std::future::Future; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use crate::rt::{Read, Write}; +use bytes::Bytes; +use futures_util::ready; +use http::{Request, Response}; +use httparse::ParserConfig; + +use super::super::dispatch::{self, TrySendError}; +use crate::body::{Body, Incoming as IncomingBody}; +use crate::proto; + +type Dispatcher<T, B> = + proto::dispatch::Dispatcher<proto::dispatch::Client<B>, B, T, proto::h1::ClientTransaction>; + +/// The sender side of an established connection. +pub struct SendRequest<B> { + dispatch: dispatch::Sender<Request<B>, Response<IncomingBody>>, +} + +/// 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)] +#[non_exhaustive] +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, +} + +/// 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. +/// +/// Instances of this type are typically created via the [`handshake`] function +#[must_use = "futures do nothing unless polled"] +pub struct Connection<T, B> +where + T: Read + Write, + B: Body + 'static, +{ + inner: Dispatcher<T, B>, +} + +impl<T, B> Connection<T, B> +where + T: Read + Write + Unpin, + B: Body + 'static, + 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> { + let (io, read_buf, _) = self.inner.into_inner(); + Parts { io, read_buf } + } + + /// 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 Context<'_>) -> Poll<crate::Result<()>> { + self.inner.poll_without_shutdown(cx) + } + + /// 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 async fn without_shutdown(self) -> crate::Result<Parts<T>> { + let mut conn = Some(self); + futures_util::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())) + }) + .await + } +} + +/// A builder to configure an HTTP connection. +/// +/// After setting options, the builder is used to create a handshake future. +/// +/// **Note**: The default values of options are *not considered stable*. They +/// are subject to change at any time. +#[derive(Clone, Debug)] +pub struct Builder { + h09_responses: bool, + h1_parser_config: ParserConfig, + h1_writev: Option<bool>, + h1_title_case_headers: bool, + h1_preserve_header_case: bool, + h1_max_headers: Option<usize>, + #[cfg(feature = "ffi")] + h1_preserve_header_order: bool, + h1_read_buf_exact_size: Option<usize>, + h1_max_buf_size: Option<usize>, +} + +/// 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, B>(io: T) -> crate::Result<(SendRequest<B>, Connection<T, B>)> +where + T: Read + Write + Unpin, + B: Body + 'static, + B::Data: Send, + B::Error: Into<Box<dyn StdError + Send + Sync>>, +{ + Builder::new().handshake(io).await +} + +// ===== 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 Context<'_>) -> Poll<crate::Result<()>> { + self.dispatch.poll_ready(cx) + } + + /// Waits until the dispatcher is ready + /// + /// If the associated connection is closed, this returns an Error. + pub async fn ready(&mut self) -> crate::Result<()> { + futures_util::future::poll_fn(|cx| self.poll_ready(cx)).await + } + + /// Checks if the connection is currently ready to send a request. + /// + /// # Note + /// + /// This is mostly a hint. Due to inherent latency of networks, it is + /// possible that even after checking this is ready, sending a request + /// may still fail because the connection was closed in the meantime. + pub fn is_ready(&self) -> bool { + self.dispatch.is_ready() + } + + /// Checks if the connection side has been closed. + pub fn is_closed(&self) -> bool { + self.dispatch.is_closed() + } +} + +impl<B> SendRequest<B> +where + B: Body + 'static, +{ + /// Sends a `Request` on the associated connection. + /// + /// Returns a future that if successful, yields the `Response`. + /// + /// `req` must have a `Host` header. + /// + /// # Uri + /// + /// The `Uri` of the request is serialized as-is. + /// + /// - Usually you want origin-form (`/path?query`). + /// - For sending to an HTTP proxy, you want to send in absolute-form + /// (`https://hyper.rs/guides`). + /// + /// This is however not enforced or validated and it is up to the user + /// of this method to ensure the `Uri` is correct for their intended purpose. + pub fn send_request( + &mut self, + req: Request<B>, + ) -> impl Future<Output = crate::Result<Response<IncomingBody>>> { + let sent = self.dispatch.send(req); + + async move { + match sent { + Ok(rx) => match rx.await { + 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"), + }, + Err(_req) => { + debug!("connection was not ready"); + Err(crate::Error::new_canceled().with("connection was not ready")) + } + } + } + } + + /// Sends a `Request` on the associated connection. + /// + /// Returns a future that if successful, yields the `Response`. + /// + /// # Error + /// + /// If there was an error before trying to serialize the request to the + /// connection, the message will be returned as part of this error. + pub fn try_send_request( + &mut self, + req: Request<B>, + ) -> impl Future<Output = Result<Response<IncomingBody>, TrySendError<Request<B>>>> { + let sent = self.dispatch.try_send(req); + async move { + match sent { + Ok(rx) => match rx.await { + Ok(Ok(res)) => Ok(res), + Ok(Err(err)) => 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 error = crate::Error::new_canceled().with("connection was not ready"); + Err(TrySendError { + error, + message: Some(req), + }) + } + } + } + } +} + +impl<B> fmt::Debug for SendRequest<B> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("SendRequest").finish() + } +} + +// ===== impl Connection + +impl<T, B> Connection<T, B> +where + T: Read + Write + Unpin + Send, + B: Body + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, +{ + /// Enable this connection to support higher-level HTTP upgrades. + /// + /// See [the `upgrade` module](crate::upgrade) for more. + pub fn with_upgrades(self) -> upgrades::UpgradeableConnection<T, B> { + upgrades::UpgradeableConnection { inner: Some(self) } + } +} + +impl<T, B> fmt::Debug for Connection<T, B> +where + T: Read + Write + fmt::Debug, + B: Body + 'static, +{ + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Connection").finish() + } +} + +impl<T, B> Future for Connection<T, B> +where + T: Read + Write + Unpin, + B: Body + '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 Context<'_>) -> Poll<Self::Output> { + match ready!(Pin::new(&mut self.inner).poll(cx))? { + proto::Dispatched::Shutdown => Poll::Ready(Ok(())), + 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 + // `upgrade` with this API, send a special + // error letting them know about that. + pending.manual(); + Poll::Ready(Ok(())) + } + } + } +} + +// ===== impl Builder + +impl Builder { + /// Creates a new connection builder. + #[inline] + pub fn new() -> Builder { + Builder { + 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, + h1_max_headers: None, + #[cfg(feature = "ffi")] + h1_preserve_header_order: false, + h1_max_buf_size: None, + } + } + + /// 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. + /// + /// Default is false. + /// + /// [RFC 7230 Section 3.2.4.]: https://tools.ietf.org/html/rfc7230#section-3.2.4 + pub fn 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. + /// + /// Default is false. + /// + /// [RFC 7230 Section 3.2.4.]: https://tools.ietf.org/html/rfc7230#section-3.2.4 + pub fn 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 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. + /// + /// Default is false. + pub fn 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 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. + /// + /// Default is false. + pub fn 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. + /// + /// Default is false. + pub fn preserve_header_case(&mut self, enabled: bool) -> &mut Builder { + self.h1_preserve_header_case = enabled; + self + } + + /// Set the maximum number of headers. + /// + /// When a response is received, the parser will reserve a buffer to store headers for optimal + /// performance. + /// + /// If client receives more headers than the buffer size, the error "message header too large" + /// is returned. + /// + /// Note that headers is allocated on the stack by default, which has higher performance. After + /// setting this value, headers will be allocated in heap memory, that is, heap memory + /// allocation will occur for each response, and there will be a performance drop of about 5%. + /// + /// Default is 100. + pub fn max_headers(&mut self, val: usize) -> &mut Self { + self.h1_max_headers = Some(val); + 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`. + /// + /// Default is false. + #[cfg(feature = "ffi")] + pub fn 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 `max_buf_size` option. + /// + /// Default is an adaptive read buffer. + pub fn 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 `read_exact_buf_size` option. + /// + /// # Panics + /// + /// The minimum value allowed is 8192. This method panics if the passed `max` is less than the minimum. + 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.h1_max_buf_size = Some(max); + self.h1_read_buf_exact_size = None; + 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: Read + Write + Unpin, + B: Body + 'static, + B::Data: Send, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + { + let opts = self.clone(); + + async move { + trace!("client handshake HTTP/1"); + + let (tx, rx) = dispatch::channel(); + 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(); + } + if let Some(max_headers) = opts.h1_max_headers { + conn.set_http1_max_headers(max_headers); + } + #[cfg(feature = "ffi")] + if opts.h1_preserve_header_order { + conn.set_preserve_header_order(); + } + + if opts.h09_responses { + conn.set_h09_responses(); + } + + 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 proto = proto::h1::Dispatcher::new(cd, conn); + + Ok((SendRequest { dispatch: tx }, Connection { inner: proto })) + } + } +} + +mod upgrades { + use crate::upgrade::Upgraded; + + use super::*; + + // A future binding a connection with a Service with Upgrade support. + // + // This type is unnameable outside the crate. + #[must_use = "futures do nothing unless polled"] + #[allow(missing_debug_implementations)] + pub struct UpgradeableConnection<T, B> + where + T: Read + Write + Unpin + Send + 'static, + B: Body + 'static, + B::Error: Into<Box<dyn StdError + Send + Sync>>, + { + pub(super) inner: Option<Connection<T, B>>, + } + + impl<I, B> Future for UpgradeableConnection<I, B> + where + I: Read + Write + Unpin + Send + 'static, + B: Body + '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 Context<'_>) -> Poll<Self::Output> { + match ready!(Pin::new(&mut self.inner.as_mut().unwrap().inner).poll(cx)) { + Ok(proto::Dispatched::Shutdown) => Poll::Ready(Ok(())), + Ok(proto::Dispatched::Upgrade(pending)) => { + let Parts { io, read_buf } = self.inner.take().unwrap().into_parts(); + pending.fulfill(Upgraded::new(io, read_buf)); + Poll::Ready(Ok(())) + } + Err(e) => Poll::Ready(Err(e)), + } + } + } +} |