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refactor http protocol selection procedure

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This commit is contained in:
Nikolay Kim 2018-01-11 21:48:36 -08:00
parent eb8052b936
commit e482b88741
6 changed files with 142 additions and 166 deletions
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2
examples/basics/Cargo.toml
View file

@ -8,4 +8,4 @@ workspace = "../.."
futures = "*"
env_logger = "0.4"
actix = "0.4"
actix-web = { git = "https://github.com/actix/actix-web" }
actix-web = { path = "../../" }

99
src/server/channel.rs
View file

@ -2,29 +2,43 @@ use std::{ptr, mem, time, io};
use std::rc::Rc;
use std::net::{SocketAddr, Shutdown};
use bytes::{Bytes, Buf, BufMut};
use bytes::{Bytes, BytesMut, Buf, BufMut};
use futures::{Future, Poll, Async};
use tokio_io::{AsyncRead, AsyncWrite};
use tokio_core::net::TcpStream;
use super::{h1, h2, HttpHandler, IoStream};
use super::{h1, h2, utils, HttpHandler, IoStream};
use super::settings::WorkerSettings;
const HTTP2_PREFACE: [u8; 14] = *b"PRI * HTTP/2.0";
enum HttpProtocol<T: IoStream, H: 'static> {
H1(h1::Http1<T, H>),
H2(h2::Http2<T, H>),
Unknown(Rc<WorkerSettings<H>>, Option<SocketAddr>, T, BytesMut),
}
impl<T: IoStream, H: 'static> HttpProtocol<T, H> {
fn is_unknown(&self) -> bool {
match *self {
HttpProtocol::Unknown(_, _, _, _) => true,
_ => false
}
}
}
enum ProtocolKind {
Http1,
Http2,
}
#[doc(hidden)]
pub struct HttpChannel<T, H>
where T: IoStream, H: HttpHandler + 'static
{
pub struct HttpChannel<T, H> where T: IoStream, H: HttpHandler + 'static {
proto: Option<HttpProtocol<T, H>>,
node: Option<Node<HttpChannel<T, H>>>,
}
impl<T, H> HttpChannel<T, H>
where T: IoStream, H: HttpHandler + 'static
impl<T, H> HttpChannel<T, H> where T: IoStream, H: HttpHandler + 'static
{
pub(crate) fn new(settings: Rc<WorkerSettings<H>>,
io: T, peer: Option<SocketAddr>, http2: bool) -> HttpChannel<T, H>
@ -38,7 +52,8 @@ impl<T, H> HttpChannel<T, H>
} else {
HttpChannel {
node: None,
proto: Some(HttpProtocol::H1(h1::Http1::new(settings, io, peer))) }
proto: Some(HttpProtocol::Unknown(
settings, peer, io, BytesMut::with_capacity(4096))) }
}
}
@ -52,7 +67,7 @@ impl<T, H> HttpChannel<T, H>
Some(HttpProtocol::H2(ref mut h2)) => {
h2.shutdown()
}
_ => unreachable!(),
_ => (),
}
}
}
@ -64,28 +79,25 @@ impl<T, H> Future for HttpChannel<T, H>
type Error = ();
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
if self.node.is_none() {
if !self.proto.as_ref().map(|p| p.is_unknown()).unwrap_or(false) && self.node.is_none() {
self.node = Some(Node::new(self));
match self.proto {
Some(HttpProtocol::H1(ref mut h1)) => {
h1.settings().head().insert(self.node.as_ref().unwrap());
}
Some(HttpProtocol::H2(ref mut h2)) => {
h2.settings().head().insert(self.node.as_ref().unwrap());
}
_ => unreachable!(),
Some(HttpProtocol::H1(ref mut h1)) =>
h1.settings().head().insert(self.node.as_ref().unwrap()),
Some(HttpProtocol::H2(ref mut h2)) =>
h2.settings().head().insert(self.node.as_ref().unwrap()),
_ => (),
}
}
match self.proto {
let kind = match self.proto {
Some(HttpProtocol::H1(ref mut h1)) => {
match h1.poll() {
Ok(Async::Ready(h1::Http1Result::Done)) => {
Ok(Async::Ready(())) => {
h1.settings().remove_channel();
self.node.as_ref().unwrap().remove();
return Ok(Async::Ready(()))
}
Ok(Async::Ready(h1::Http1Result::Switch)) => (),
Ok(Async::NotReady) =>
return Ok(Async::NotReady),
Err(_) => {
@ -94,7 +106,7 @@ impl<T, H> Future for HttpChannel<T, H>
return Err(())
}
}
}
},
Some(HttpProtocol::H2(ref mut h2)) => {
let result = h2.poll();
match result {
@ -105,18 +117,49 @@ impl<T, H> Future for HttpChannel<T, H>
_ => (),
}
return result
}
},
Some(HttpProtocol::Unknown(_, _, ref mut io, ref mut buf)) => {
match utils::read_from_io(io, buf) {
Ok(Async::Ready(0)) => {
debug!("Ignored premature client disconnection");
return Err(())
},
Err(err) => {
debug!("Ignored premature client disconnection {}", err);
return Err(())
}
_ => (),
}
if buf.len() >= 14 {
if buf[..14] == HTTP2_PREFACE[..] {
ProtocolKind::Http2
} else {
ProtocolKind::Http1
}
} else {
return Ok(Async::NotReady);
}
},
None => unreachable!(),
}
};
// upgrade to h2
let proto = self.proto.take().unwrap();
match proto {
HttpProtocol::H1(h1) => {
let (h, io, addr, buf) = h1.into_inner();
self.proto = Some(
HttpProtocol::H2(h2::Http2::new(h, io, addr, buf)));
self.poll()
HttpProtocol::Unknown(settings, addr, io, buf) => {
match kind {
ProtocolKind::Http1 => {
self.proto = Some(
HttpProtocol::H1(h1::Http1::new(settings, io, addr, buf)));
self.poll()
},
ProtocolKind::Http2 => {
self.proto = Some(
HttpProtocol::H2(h2::Http2::new(settings, io, addr, buf.freeze())));
self.poll()
},
}
}
_ => unreachable!()
}

172
src/server/h1.rs
View file

@ -8,7 +8,7 @@ use actix::Arbiter;
use httparse;
use http::{Uri, Method, Version, HttpTryFrom, HeaderMap};
use http::header::{self, HeaderName, HeaderValue};
use bytes::{Bytes, BytesMut, BufMut};
use bytes::{Bytes, BytesMut};
use futures::{Future, Poll, Async};
use tokio_core::reactor::Timeout;
@ -18,24 +18,20 @@ use httprequest::HttpRequest;
use error::{ParseError, PayloadError, ResponseError};
use payload::{Payload, PayloadWriter, DEFAULT_BUFFER_SIZE};
use super::Writer;
use super::{utils, Writer};
use super::h1writer::H1Writer;
use super::encoding::PayloadType;
use super::settings::WorkerSettings;
use super::{HttpHandler, HttpHandlerTask, IoStream};
const LW_BUFFER_SIZE: usize = 4096;
const HW_BUFFER_SIZE: usize = 16_384;
const MAX_BUFFER_SIZE: usize = 131_072;
const MAX_HEADERS: usize = 100;
const MAX_HEADERS: usize = 96;
const MAX_PIPELINED_MESSAGES: usize = 16;
const HTTP2_PREFACE: [u8; 14] = *b"PRI * HTTP/2.0";
bitflags! {
struct Flags: u8 {
const ERROR = 0b0000_0010;
const KEEPALIVE = 0b0000_0100;
const H2 = 0b0000_1000;
}
}
@ -47,17 +43,6 @@ bitflags! {
}
}
pub(crate) enum Http1Result {
Done,
Switch,
}
#[derive(Debug)]
enum Item {
Http1(HttpRequest),
Http2,
}
pub(crate) struct Http1<T: IoStream, H: 'static> {
flags: Flags,
settings: Rc<WorkerSettings<H>>,
@ -77,14 +62,16 @@ struct Entry {
impl<T, H> Http1<T, H>
where T: IoStream, H: HttpHandler + 'static
{
pub fn new(h: Rc<WorkerSettings<H>>, stream: T, addr: Option<SocketAddr>) -> Self {
pub fn new(h: Rc<WorkerSettings<H>>, stream: T, addr: Option<SocketAddr>, buf: BytesMut)
-> Self
{
let bytes = h.get_shared_bytes();
Http1{ flags: Flags::KEEPALIVE,
settings: h,
addr: addr,
stream: H1Writer::new(stream, bytes),
reader: Reader::new(),
read_buf: BytesMut::new(),
read_buf: buf,
tasks: VecDeque::new(),
keepalive_timer: None }
}
@ -93,10 +80,6 @@ impl<T, H> Http1<T, H>
self.settings.as_ref()
}
pub fn into_inner(self) -> (Rc<WorkerSettings<H>>, T, Option<SocketAddr>, Bytes) {
(self.settings, self.stream.into_inner(), self.addr, self.read_buf.freeze())
}
pub(crate) fn io(&mut self) -> &mut T {
self.stream.get_mut()
}
@ -115,13 +98,13 @@ impl<T, H> Http1<T, H>
// TODO: refacrtor
#[cfg_attr(feature = "cargo-clippy", allow(cyclomatic_complexity))]
pub fn poll(&mut self) -> Poll<Http1Result, ()> {
pub fn poll(&mut self) -> Poll<(), ()> {
// keep-alive timer
if self.keepalive_timer.is_some() {
match self.keepalive_timer.as_mut().unwrap().poll() {
Ok(Async::Ready(_)) => {
trace!("Keep-alive timeout, close connection");
return Ok(Async::Ready(Http1Result::Done))
return Ok(Async::Ready(()))
}
Ok(Async::NotReady) => (),
Err(_) => unreachable!(),
@ -209,27 +192,18 @@ impl<T, H> Http1<T, H>
// no keep-alive
if !self.flags.contains(Flags::KEEPALIVE) && self.tasks.is_empty() {
let h2 = self.flags.contains(Flags::H2);
// check stream state
if !self.poll_completed(!h2)? {
if !self.poll_completed(true)? {
return Ok(Async::NotReady)
}
if h2 {
return Ok(Async::Ready(Http1Result::Switch))
} else {
return Ok(Async::Ready(Http1Result::Done))
}
return Ok(Async::Ready(()))
}
// read incoming data
while !self.flags.contains(Flags::ERROR) && !self.flags.contains(Flags::H2) &&
self.tasks.len() < MAX_PIPELINED_MESSAGES
{
while !self.flags.contains(Flags::ERROR) && self.tasks.len() < MAX_PIPELINED_MESSAGES {
match self.reader.parse(self.stream.get_mut(),
&mut self.read_buf, &self.settings) {
Ok(Async::Ready(Item::Http1(mut req))) => {
Ok(Async::Ready(mut req)) => {
not_ready = false;
// set remote addr
@ -254,9 +228,6 @@ impl<T, H> Http1<T, H>
Entry {pipe: pipe.unwrap_or_else(|| Pipeline::error(HTTPNotFound)),
flags: EntryFlags::empty()});
}
Ok(Async::Ready(Item::Http2)) => {
self.flags.insert(Flags::H2);
}
Err(ReaderError::Disconnect) => {
not_ready = false;
self.flags.insert(Flags::ERROR);
@ -309,7 +280,7 @@ impl<T, H> Http1<T, H>
return Ok(Async::NotReady)
}
// keep-alive disable, drop connection
return Ok(Async::Ready(Http1Result::Done))
return Ok(Async::Ready(()))
}
} else if !self.poll_completed(false)? ||
self.flags.contains(Flags::KEEPALIVE)
@ -318,7 +289,7 @@ impl<T, H> Http1<T, H>
// if keep-alive unset, rely on operating system
return Ok(Async::NotReady)
} else {
return Ok(Async::Ready(Http1Result::Done))
return Ok(Async::Ready(()))
}
}
break
@ -328,17 +299,12 @@ impl<T, H> Http1<T, H>
// check for parse error
if self.tasks.is_empty() {
let h2 = self.flags.contains(Flags::H2);
// check stream state
if !self.poll_completed(!h2)? {
if !self.poll_completed(true)? {
return Ok(Async::NotReady)
}
if h2 {
return Ok(Async::Ready(Http1Result::Switch))
}
if self.flags.contains(Flags::ERROR) || self.keepalive_timer.is_none() {
return Ok(Async::Ready(Http1Result::Done))
return Ok(Async::Ready(()))
}
}
@ -351,7 +317,6 @@ impl<T, H> Http1<T, H>
}
struct Reader {
h1: bool,
payload: Option<PayloadInfo>,
}
@ -373,22 +338,14 @@ enum ReaderError {
Error(ParseError),
}
enum Message {
Http1(HttpRequest, Option<PayloadInfo>),
Http2,
NotReady,
}
impl Reader {
pub fn new() -> Reader {
Reader {
h1: false,
payload: None,
}
}
fn decode(&mut self, buf: &mut BytesMut) -> std::result::Result<Decoding, ReaderError>
{
fn decode(&mut self, buf: &mut BytesMut) -> std::result::Result<Decoding, ReaderError> {
if let Some(ref mut payload) = self.payload {
if payload.tx.capacity() > DEFAULT_BUFFER_SIZE {
return Ok(Decoding::Paused)
@ -416,12 +373,12 @@ impl Reader {
pub fn parse<T, H>(&mut self, io: &mut T,
buf: &mut BytesMut,
settings: &WorkerSettings<H>) -> Poll<Item, ReaderError>
settings: &WorkerSettings<H>) -> Poll<HttpRequest, ReaderError>
where T: IoStream
{
// read payload
if self.payload.is_some() {
match self.read_from_io(io, buf) {
match utils::read_from_io(io, buf) {
Ok(Async::Ready(0)) => {
if let Some(ref mut payload) = self.payload {
payload.tx.set_error(PayloadError::Incomplete);
@ -446,7 +403,7 @@ impl Reader {
// if buf is empty parse_message will always return NotReady, let's avoid that
let read = if buf.is_empty() {
match self.read_from_io(io, buf) {
match utils::read_from_io(io, buf) {
Ok(Async::Ready(0)) => {
// debug!("Ignored premature client disconnection");
return Err(ReaderError::Disconnect);
@ -464,7 +421,7 @@ impl Reader {
loop {
match Reader::parse_message(buf, settings).map_err(ReaderError::Error)? {
Message::Http1(msg, decoder) => {
Async::Ready((msg, decoder)) => {
// process payload
if let Some(payload) = decoder {
self.payload = Some(payload);
@ -473,22 +430,15 @@ impl Reader {
Decoding::Ready => self.payload = None,
}
}
self.h1 = true;
return Ok(Async::Ready(Item::Http1(msg)));
return Ok(Async::Ready(msg));
},
Message::Http2 => {
if self.h1 {
return Err(ReaderError::Error(ParseError::Version))
}
return Ok(Async::Ready(Item::Http2));
},
Message::NotReady => {
Async::NotReady => {
if buf.capacity() >= MAX_BUFFER_SIZE {
error!("MAX_BUFFER_SIZE unprocessed data reached, closing");
return Err(ReaderError::Error(ParseError::TooLarge));
}
if read {
match self.read_from_io(io, buf) {
match utils::read_from_io(io, buf) {
Ok(Async::Ready(0)) => {
debug!("Ignored premature client disconnection");
return Err(ReaderError::Disconnect);
@ -507,39 +457,8 @@ impl Reader {
}
}
fn read_from_io<T: IoStream>(&mut self, io: &mut T, buf: &mut BytesMut)
-> Poll<usize, io::Error>
{
unsafe {
if buf.remaining_mut() < LW_BUFFER_SIZE {
buf.reserve(HW_BUFFER_SIZE);
}
match io.read(buf.bytes_mut()) {
Ok(n) => {
buf.advance_mut(n);
Ok(Async::Ready(n))
},
Err(e) => {
if e.kind() == io::ErrorKind::WouldBlock {
Ok(Async::NotReady)
} else {
Err(e)
}
}
}
}
}
fn parse_message<H>(buf: &mut BytesMut, settings: &WorkerSettings<H>)
-> Result<Message, ParseError>
{
if buf.is_empty() {
return Ok(Message::NotReady);
}
if buf.len() >= 14 && buf[..14] == HTTP2_PREFACE[..] {
return Ok(Message::Http2)
}
-> Poll<(HttpRequest, Option<PayloadInfo>), ParseError> {
// Parse http message
let msg = {
let bytes_ptr = buf.as_ref().as_ptr() as usize;
@ -565,7 +484,7 @@ impl Reader {
};
(len, method, path, version, req.headers.len())
}
httparse::Status::Partial => return Ok(Message::NotReady),
httparse::Status::Partial => return Ok(Async::NotReady),
}
};
@ -625,9 +544,9 @@ impl Reader {
decoder: decoder,
};
msg.get_mut().payload = Some(payload);
Ok(Message::Http1(HttpRequest::from_message(msg), Some(info)))
Ok(Async::Ready((HttpRequest::from_message(msg), Some(info))))
} else {
Ok(Message::Http1(HttpRequest::from_message(msg), None))
Ok(Async::Ready((HttpRequest::from_message(msg), None)))
}
}
}
@ -977,7 +896,7 @@ mod tests {
($e:expr) => ({
let settings = WorkerSettings::<HttpApplication>::new(Vec::new(), None);
match Reader::new().parse($e, &mut BytesMut::new(), &settings) {
Ok(Async::Ready(Item::Http1(req))) => req,
Ok(Async::Ready(req)) => req,
Ok(_) => panic!("Eof during parsing http request"),
Err(err) => panic!("Error during parsing http request: {:?}", err),
}
@ -987,7 +906,7 @@ mod tests {
macro_rules! reader_parse_ready {
($e:expr) => (
match $e {
Ok(Async::Ready(Item::Http1(req))) => req,
Ok(Async::Ready(req)) => req,
Ok(_) => panic!("Eof during parsing http request"),
Err(err) => panic!("Error during parsing http request: {:?}", err),
}
@ -1019,7 +938,7 @@ mod tests {
let mut reader = Reader::new();
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(req))) => {
Ok(Async::Ready(req)) => {
assert_eq!(req.version(), Version::HTTP_11);
assert_eq!(*req.method(), Method::GET);
assert_eq!(req.path(), "/test");
@ -1042,7 +961,7 @@ mod tests {
buf.feed_data(".1\r\n\r\n");
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(req))) => {
Ok(Async::Ready(req)) => {
assert_eq!(req.version(), Version::HTTP_11);
assert_eq!(*req.method(), Method::PUT);
assert_eq!(req.path(), "/test");
@ -1059,7 +978,7 @@ mod tests {
let mut reader = Reader::new();
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(req))) => {
Ok(Async::Ready(req)) => {
assert_eq!(req.version(), Version::HTTP_10);
assert_eq!(*req.method(), Method::POST);
assert_eq!(req.path(), "/test2");
@ -1076,7 +995,7 @@ mod tests {
let mut reader = Reader::new();
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(mut req))) => {
Ok(Async::Ready(mut req)) => {
assert_eq!(req.version(), Version::HTTP_11);
assert_eq!(*req.method(), Method::GET);
assert_eq!(req.path(), "/test");
@ -1095,7 +1014,7 @@ mod tests {
let mut reader = Reader::new();
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(mut req))) => {
Ok(Async::Ready(mut req)) => {
assert_eq!(req.version(), Version::HTTP_11);
assert_eq!(*req.method(), Method::GET);
assert_eq!(req.path(), "/test");
@ -1116,7 +1035,7 @@ mod tests {
buf.feed_data("\r\n");
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(req))) => {
Ok(Async::Ready(req)) => {
assert_eq!(req.version(), Version::HTTP_11);
assert_eq!(*req.method(), Method::GET);
assert_eq!(req.path(), "/test");
@ -1142,7 +1061,7 @@ mod tests {
buf.feed_data("t: value\r\n\r\n");
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(req))) => {
Ok(Async::Ready(req)) => {
assert_eq!(req.version(), Version::HTTP_11);
assert_eq!(*req.method(), Method::GET);
assert_eq!(req.path(), "/test");
@ -1163,7 +1082,7 @@ mod tests {
let mut reader = Reader::new();
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http1(req))) => {
Ok(Async::Ready(req)) => {
let val: Vec<_> = req.headers().get_all("Set-Cookie")
.iter().map(|v| v.to_str().unwrap().to_owned()).collect();
assert_eq!(val[0], "c1=cookie1");
@ -1512,17 +1431,4 @@ mod tests {
Err(err) => panic!("{:?}", err),
}
}*/
#[test]
fn test_http2_prefix() {
let mut buf = Buffer::new("PRI * HTTP/2.0\r\n\r\n");
let mut readbuf = BytesMut::new();
let settings = WorkerSettings::<HttpApplication>::new(Vec::new(), None);
let mut reader = Reader::new();
match reader.parse(&mut buf, &mut readbuf, &settings) {
Ok(Async::Ready(Item::Http2)) => (),
Ok(_) | Err(_) => panic!("Error during parsing http request"),
}
}
}

4
src/server/h1writer.rs
View file

@ -55,10 +55,6 @@ impl<T: AsyncWrite> H1Writer<T> {
self.flags = Flags::empty();
}
pub fn into_inner(self) -> T {
self.stream
}
pub fn disconnected(&mut self) {
self.encoder.get_mut().take();
}

1
src/server/mod.rs
View file

@ -14,6 +14,7 @@ mod h2;
mod h1writer;
mod h2writer;
mod settings;
mod utils;
pub use self::srv::HttpServer;
pub use self::settings::ServerSettings;

30
src/server/utils.rs Normal file
View file

@ -0,0 +1,30 @@
use std::io;
use bytes::{BytesMut, BufMut};
use futures::{Async, Poll};
use super::IoStream;
const LW_BUFFER_SIZE: usize = 4096;
const HW_BUFFER_SIZE: usize = 16_384;
pub fn read_from_io<T: IoStream>(io: &mut T, buf: &mut BytesMut) -> Poll<usize, io::Error> {
unsafe {
if buf.remaining_mut() < LW_BUFFER_SIZE {
buf.reserve(HW_BUFFER_SIZE);
}
match io.read(buf.bytes_mut()) {
Ok(n) => {
buf.advance_mut(n);
Ok(Async::Ready(n))
},
Err(e) => {
if e.kind() == io::ErrorKind::WouldBlock {
Ok(Async::NotReady)
} else {
Err(e)
}
}
}
}
}