1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
//! 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(all(feature = "backports", feature = "http1"))]
pub mod http1;
#[cfg(all(feature = "backports", feature = "http2"))]
pub mod http2;
cfg_feature! {
#![any(feature = "http1", feature = "http2")]
use std::error::Error as StdError;
use std::fmt;
use std::task::{Context, Poll};
use std::pin::Pin;
use std::future::Future;
use std::marker::Unpin;
#[cfg(not(all(feature = "http1", feature = "http2")))]
use std::convert::Infallible;
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::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"))))]
#[cfg_attr(
feature = "deprecated",
deprecated(
note = "This struct will be replaced with `server::conn::http1::Builder` and `server::conn::http2::Builder` in 1.0, enable the \"backports\" feature to use them now."
)
)]
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> = (Infallible, 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> = (
Infallible,
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"))))]
#[cfg_attr(
feature = "deprecated",
deprecated(
note = "This struct will be replaced with `server::conn::http1::Parts` in 1.0, enable the \"backports\" feature to use them now."
)
)]
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_attr(feature = "deprecated", allow(deprecated))]
#[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_attr(feature = "deprecated", allow(deprecated))]
#[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
}
/// Configures the maximum number of pending reset streams allowed before a GOAWAY will be sent.
///
/// This will default to the default value set by the [`h2` crate](https://crates.io/crates/h2).
/// As of v0.3.17, it is 20.
///
/// See <https://github.com/hyperium/hyper/issues/2877> for more information.
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_max_pending_accept_reset_streams(
&mut self,
max: impl Into<Option<usize>>,
) -> &mut Self {
self.h2_builder.max_pending_accept_reset_streams = max.into();
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.
#[cfg_attr(feature = "deprecated", allow(deprecated))]
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.
#[cfg_attr(feature = "deprecated", allow(deprecated))]
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 Context<'_>) -> Poll<crate::Result<()>> {
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.
#[cfg_attr(feature = "deprecated", allow(deprecated))]
pub fn without_shutdown(self) -> impl Future<Output = crate::Result<Parts<I, S>>> {
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,
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 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 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 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));
}
}
}
}
}
}