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use bytes::{ BytesMut, Buf };
use crate::{
HttpResult,
HttpError,
Request,
};
use tokio_util::codec::{
Decoder,
};
#[derive(Debug, Default)]
pub struct HttpCodec {
pub pos_n: Vec<usize>,
pub payload: BytesMut,
}
impl HttpCodec {
#[inline(always)]
fn _parse(&mut self, buf: &mut BytesMut) -> Option<Request> {
for (i, c) in buf.iter().enumerate() {
if *c == 0x0A {
let i = self.payload.len() + i;
self.pos_n.push(i);
if self.pos_n.len() >= 2 && (i - 2 == self.pos_n[self.pos_n.len() - 2]) {
self._advance(buf);
return self._build_request();
}
}
}
self._advance(buf);
None
}
#[inline(always)]
fn _advance(&mut self, buf: &mut BytesMut) {
self.payload.extend_from_slice(&buf[..]);
buf.advance(buf.len());
}
#[inline(always)]
fn _build_request(&self) -> Option<Request> {
Some(Request::new(&self.payload, &self.pos_n))
}
}
impl HttpCodec {
}
impl Decoder for HttpCodec {
type Item = Request;
type Error = HttpError;
fn decode(&mut self, buf: &mut BytesMut) -> HttpResult<Option<Self::Item>> {
println!("{:?}", buf);
if let Some(request) = self._parse(buf) {
return Ok(Some(request))
}
Ok(None)
}
}
#[cfg(test)]
mod tests {
extern crate test;
use bytes::{ BytesMut, BufMut };
use super::*;
use crate::Method;
use test::Bencher;
#[test]
fn decode() {
let mut codec = HttpCodec::default();
let mut buf = BytesMut::from(&b"GET "[..]);
let res = codec.decode(&mut buf);
assert!(res.unwrap().is_none());
buf.put_slice(&b"/ws/terminal HTTP/"[..]);
let res = codec.decode(&mut buf);
assert!(res.unwrap().is_none());
buf.put_slice(&b"1.1\r\nHost: hawk.local\r"[..]);
let res = codec.decode(&mut buf);
assert!(res.unwrap().is_none());
buf.put_slice(&b"\nUpgrade:websocket\r"[..]);
let res = codec.decode(&mut buf);
assert!(res.unwrap().is_none());
buf.put_slice(&b"\n\r\n"[..]);
let res = codec.decode(&mut buf);
let req = res.unwrap().unwrap();
assert_eq!("https://hawk.local/ws/terminal", req.url.as_str());
assert_eq!(Method::GET, req.method);
assert_eq!(1, req.version);
assert_eq!("hawk.local", req.headers.get("host").unwrap());
assert_eq!("websocket", req.headers.get("upgrade").unwrap());
}
#[bench]
fn bench_decode(b: &mut Bencher) {
b.iter(|| decode())
}
}