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refactor read_from_io

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This commit is contained in:
Nikolay Kim 2018-06-22 11:30:40 +06:00
parent edd22bb279
commit fc7238baee
4 changed files with 84 additions and 67 deletions
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16
src/client/parser.rs
View file

@ -40,8 +40,10 @@ impl HttpResponseParser {
// if buf is empty parse_message will always return NotReady, let's avoid that
if buf.is_empty() {
match io.read_available(buf) {
Ok(Async::Ready(0)) => return Err(HttpResponseParserError::Disconnect),
Ok(Async::Ready(_)) => (),
Ok(Async::Ready(true)) => {
return Err(HttpResponseParserError::Disconnect)
}
Ok(Async::Ready(false)) => (),
Ok(Async::NotReady) => return Ok(Async::NotReady),
Err(err) => return Err(HttpResponseParserError::Error(err.into())),
}
@ -60,10 +62,10 @@ impl HttpResponseParser {
return Err(HttpResponseParserError::Error(ParseError::TooLarge));
}
match io.read_available(buf) {
Ok(Async::Ready(0)) => {
Ok(Async::Ready(true)) => {
return Err(HttpResponseParserError::Disconnect)
}
Ok(Async::Ready(_)) => (),
Ok(Async::Ready(false)) => (),
Ok(Async::NotReady) => return Ok(Async::NotReady),
Err(err) => {
return Err(HttpResponseParserError::Error(err.into()))
@ -84,10 +86,10 @@ impl HttpResponseParser {
loop {
// read payload
let (not_ready, stream_finished) = match io.read_available(buf) {
Ok(Async::Ready(0)) => (false, true),
Err(err) => return Err(err.into()),
Ok(Async::Ready(true)) => (false, true),
Ok(Async::Ready(false)) => (false, false),
Ok(Async::NotReady) => (true, false),
_ => (false, false),
Err(err) => return Err(err.into()),
};
match self.decoder.as_mut().unwrap().decode(buf) {

2
src/server/channel.rs
View file

@ -140,7 +140,7 @@ where
ref mut buf,
)) => {
match io.read_available(buf) {
Ok(Async::Ready(0)) | Err(_) => {
Ok(Async::Ready(true)) | Err(_) => {
debug!("Ignored premature client disconnection");
settings.remove_channel();
if let Some(n) = self.node.as_mut() {

94
src/server/h1.rs
View file

@ -1,10 +1,9 @@
use std::collections::VecDeque;
use std::io;
use std::net::SocketAddr;
use std::rc::Rc;
use std::time::{Duration, Instant};
use bytes::{BufMut, BytesMut};
use bytes::BytesMut;
use futures::{Async, Future, Poll};
use tokio_timer::Delay;
@ -22,8 +21,6 @@ use super::Writer;
use super::{HttpHandler, HttpHandlerTask, IoStream};
const MAX_PIPELINED_MESSAGES: usize = 16;
const LW_BUFFER_SIZE: usize = 4096;
const HW_BUFFER_SIZE: usize = 32_768;
bitflags! {
struct Flags: u8 {
@ -32,6 +29,7 @@ bitflags! {
const KEEPALIVE = 0b0000_0100;
const SHUTDOWN = 0b0000_1000;
const DISCONNECTED = 0b0001_0000;
const POLLED = 0b0010_0000;
}
}
@ -173,29 +171,58 @@ where
#[inline]
/// read data from stream
pub fn poll_io(&mut self) {
if !self.flags.contains(Flags::POLLED) {
self.parse();
self.flags.insert(Flags::POLLED);
return;
}
// read io from socket
if !self.flags.intersects(Flags::ERROR)
&& self.tasks.len() < MAX_PIPELINED_MESSAGES
&& self.can_read()
{
if self.read() {
// notify all tasks
self.stream.disconnected();
for entry in &mut self.tasks {
entry.pipe.disconnected()
}
// kill keepalive
self.keepalive_timer.take();
let res = self.stream.get_mut().read_available(&mut self.buf);
match res {
//self.stream.get_mut().read_available(&mut self.buf) {
Ok(Async::Ready(disconnected)) => {
if disconnected {
// notify all tasks
self.stream.disconnected();
for entry in &mut self.tasks {
entry.pipe.disconnected()
}
// kill keepalive
self.keepalive_timer.take();
// on parse error, stop reading stream but tasks need to be
// completed
self.flags.insert(Flags::ERROR);
// on parse error, stop reading stream but tasks need to be
// completed
self.flags.insert(Flags::ERROR);
if let Some(mut payload) = self.payload.take() {
payload.set_error(PayloadError::Incomplete);
if let Some(mut payload) = self.payload.take() {
payload.set_error(PayloadError::Incomplete);
}
} else {
self.parse();
}
}
Ok(Async::NotReady) => (),
Err(_) => {
// notify all tasks
self.stream.disconnected();
for entry in &mut self.tasks {
entry.pipe.disconnected()
}
// kill keepalive
self.keepalive_timer.take();
// on parse error, stop reading stream but tasks need to be
// completed
self.flags.insert(Flags::ERROR);
if let Some(mut payload) = self.payload.take() {
payload.set_error(PayloadError::Incomplete);
}
}
} else {
self.parse();
}
}
}
@ -434,35 +461,12 @@ where
}
}
}
#[inline]
fn read(&mut self) -> bool {
loop {
unsafe {
if self.buf.remaining_mut() < LW_BUFFER_SIZE {
self.buf.reserve(HW_BUFFER_SIZE);
}
match self.stream.get_mut().read(self.buf.bytes_mut()) {
Ok(n) => {
if n == 0 {
return true;
} else {
self.buf.advance_mut(n);
}
}
Err(e) => {
return e.kind() != io::ErrorKind::WouldBlock;
}
}
}
}
}
}
#[cfg(test)]
mod tests {
use std::net::Shutdown;
use std::{cmp, time};
use std::{cmp, io, time};
use bytes::{Buf, Bytes, BytesMut};
use http::{Method, Version};
@ -606,7 +610,7 @@ mod tests {
let mut h1 = Http1::new(Rc::clone(&settings), buf, None, readbuf);
h1.poll_io();
h1.parse();
h1.poll_io();
assert_eq!(h1.tasks.len(), 1);
}
@ -621,7 +625,7 @@ mod tests {
let mut h1 = Http1::new(Rc::clone(&settings), buf, None, readbuf);
h1.poll_io();
h1.parse();
h1.poll_io();
assert!(h1.flags.contains(Flags::ERROR));
}

39
src/server/mod.rs
View file

@ -216,21 +216,32 @@ pub trait IoStream: AsyncRead + AsyncWrite + 'static {
fn set_linger(&mut self, dur: Option<time::Duration>) -> io::Result<()>;
fn read_available(&mut self, buf: &mut BytesMut) -> Poll<usize, io::Error> {
unsafe {
if buf.remaining_mut() < LW_BUFFER_SIZE {
buf.reserve(HW_BUFFER_SIZE);
}
match self.read(buf.bytes_mut()) {
Ok(n) => {
buf.advance_mut(n);
Ok(Async::Ready(n))
fn read_available(&mut self, buf: &mut BytesMut) -> Poll<bool, io::Error> {
let mut read_some = false;
loop {
unsafe {
if buf.remaining_mut() < LW_BUFFER_SIZE {
buf.reserve(HW_BUFFER_SIZE);
}
Err(e) => {
if e.kind() == io::ErrorKind::WouldBlock {
Ok(Async::NotReady)
} else {
Err(e)
match self.read(buf.bytes_mut()) {
Ok(n) => {
if n == 0 {
return Ok(Async::Ready(!read_some));
} else {
read_some = true;
buf.advance_mut(n);
}
}
Err(e) => {
return if e.kind() == io::ErrorKind::WouldBlock {
if read_some {
Ok(Async::Ready(false))
} else {
Ok(Async::NotReady)
}
} else {
Err(e)
};
}
}
}