feat(http): use the bytes crate for Chunk and internally

src/http/mod.rs

@@ -2,6 +2,8 @@
 use std::borrow::Cow;
 use std::fmt;
 
+use bytes::BytesMut;
+
 use header::{Connection, ConnectionOption};
 use header::Headers;
 use method::Method;
@@ -13,16 +15,15 @@ use version::HttpVersion::{Http10, Http11};
 pub use self::conn::{Conn, KeepAlive, KA};
 pub use self::body::{Body, TokioBody};
 pub use self::chunk::Chunk;
-use self::buf::MemBuf;
+pub use self::str::ByteStr;
 
 mod body;
-#[doc(hidden)]
-pub mod buf;
 mod chunk;
 mod conn;
 mod io;
 mod h1;
 //mod h2;
+mod str;
 
 /*
 macro_rules! nonblocking {
@@ -124,8 +125,7 @@ pub enum ClientTransaction {}
 pub trait Http1Transaction {
     type Incoming;
     type Outgoing: Default;
-    //type KeepAlive: KeepAlive;
-    fn parse(bytes: &MemBuf) -> ParseResult<Self::Incoming>;
+    fn parse(bytes: &mut BytesMut) -> ParseResult<Self::Incoming>;
     fn decoder(head: &MessageHead<Self::Incoming>) -> ::Result<h1::Decoder>;
     fn encode(head: &mut MessageHead<Self::Outgoing>, dst: &mut Vec<u8>) -> h1::Encoder;
     fn should_set_length(head: &MessageHead<Self::Outgoing>) -> bool;