Use input_buffer as separate crate.

Signed-off-by: Alexey Galakhov <agalakhov@snapview.de>

Cargo.toml

@@ -7,9 +7,9 @@ authors = ["Alexey Galakhov"]
 license = "MIT/Apache-2.0"
 readme = "README.md"
 homepage = "https://github.com/snapview/tungstenite-rs"
-documentation = "https://docs.rs/tungstenite/0.5.0"
+documentation = "https://docs.rs/tungstenite/0.5.1"
 repository = "https://github.com/snapview/tungstenite-rs"
-version = "0.5.0"
+version = "0.5.1"
 
 [features]
 default = ["tls"]
@@ -20,6 +20,7 @@ base64 = "0.6.0"
 byteorder = "1.1.0"
 bytes = "0.4.4"
 httparse = "1.2.3"
+input_buffer = "0.1.1"
 log = "0.3.8"
 rand = "0.3.16"
 sha1 = "0.2.0"

src/handshake/machine.rs

@@ -42,9 +42,11 @@ impl<Stream: Read + Write> HandshakeMachine<Stream> {
         trace!("Doing handshake round.");
         match self.state {
             HandshakeState::Reading(mut buf) => {
-                buf.reserve(MIN_READ, usize::max_value()) // TODO limit size
-                    .map_err(|_| Error::Capacity("Header too long".into()))?;
-                match buf.read_from(&mut self.stream).no_block()? {
+                let read = buf.prepare_reserve(MIN_READ)
+                    .with_limit(usize::max_value()) // TODO limit size
+                    .map_err(|_| Error::Capacity("Header too long".into()))?
+                    .read_from(&mut self.stream).no_block()?;
+                match read {
                     Some(0) => {
                         Err(Error::Protocol("Handshake not finished".into()))
                     }

src/input_buffer.rs

@@ -1,89 +0,0 @@
-use std::io::{Cursor, Read, Result as IoResult};
-use bytes::{Buf, BufMut};
-
-/// A FIFO buffer for reading packets from network.
-pub struct InputBuffer(Cursor<Vec<u8>>);
-
-/// The minimum read size.
-pub const MIN_READ: usize = 4096;
-
-/// Size limit error.
-pub struct SizeLimit;
-
-impl InputBuffer {
-    /// Create a new empty one.
-    pub fn with_capacity(capacity: usize) -> Self {
-        InputBuffer(Cursor::new(Vec::with_capacity(capacity)))
-    }
-
-    /// Create a new one from partially read data.
-    pub fn from_partially_read(part: Vec<u8>) -> Self {
-        InputBuffer(Cursor::new(part))
-    }
-
-    /// Reserve the given amount of space.
-    pub fn reserve(&mut self, space: usize, limit: usize) -> Result<(), SizeLimit>{
-        let remaining = self.inp_mut().capacity() - self.inp_mut().len();
-        if remaining >= space {
-            // We have enough space right now.
-            Ok(())
-        } else {
-            let pos = self.out().position() as usize;
-            self.inp_mut().drain(0..pos);
-            self.out_mut().set_position(0);
-            let avail = self.inp_mut().capacity() - self.inp_mut().len();
-            if space <= avail {
-                Ok(())
-            } else if self.inp_mut().capacity() + space > limit {
-                Err(SizeLimit)
-            } else {
-                self.inp_mut().reserve(space - avail);
-                Ok(())
-            }
-        }
-    }
-
-    /// Read data from stream into the buffer.
-    pub fn read_from<S: Read>(&mut self, stream: &mut S) -> IoResult<usize> {
-        let size;
-        let buf = self.inp_mut();
-        unsafe {
-            size = stream.read(buf.bytes_mut())?;
-            buf.advance_mut(size);
-        }
-        Ok(size)
-    }
-
-    /// Get the rest of the buffer and destroy the buffer.
-    pub fn into_vec(mut self) -> Vec<u8> {
-        let pos = self.out().position() as usize;
-        self.inp_mut().drain(0..pos);
-        self.0.into_inner()
-    }
-
-    /// The output end (to the application).
-    pub fn out(&self) -> &Cursor<Vec<u8>> {
-        &self.0 // the cursor itself
-    }
-    /// The output end (to the application).
-    pub fn out_mut(&mut self) -> &mut Cursor<Vec<u8>> {
-        &mut self.0 // the cursor itself
-    }
-
-    /// The input end (to the network).
-    fn inp_mut(&mut self) -> &mut Vec<u8> {
-        self.0.get_mut() // underlying vector
-    }
-}
-
-impl Buf for InputBuffer {
-    fn remaining(&self) -> usize {
-        Buf::remaining(self.out())
-    }
-    fn bytes(&self) -> &[u8] {
-        Buf::bytes(self.out())
-    }
-    fn advance(&mut self, size: usize) {
-        Buf::advance(self.out_mut(), size)
-    }
-}

src/lib.rs

@@ -14,6 +14,7 @@ extern crate base64;
 extern crate byteorder;
 extern crate bytes;
 extern crate httparse;
+extern crate input_buffer;
 extern crate rand;
 extern crate sha1;
 extern crate url;
@@ -28,8 +29,6 @@ pub mod handshake;
 pub mod stream;
 pub mod util;
 
-mod input_buffer;
-
 pub use client::{connect, client};
 pub use server::{accept, accept_hdr};
 pub use error::{Error, Result};

src/protocol/frame/mod.rs

@@ -57,14 +57,15 @@ impl<Stream> FrameSocket<Stream>
     /// Read a frame from stream.
     pub fn read_frame(&mut self) -> Result<Option<Frame>> {
         loop {
-            if let Some(frame) = Frame::parse(&mut self.in_buffer.out_mut())? {
+            if let Some(frame) = Frame::parse(&mut self.in_buffer.as_cursor_mut())? {
                 trace!("received frame {}", frame);
                 return Ok(Some(frame));
             }
             // No full frames in buffer.
-            self.in_buffer.reserve(MIN_READ, usize::max_value())
-                .map_err(|_| Error::Capacity("Incoming TCP buffer is full".into()))?;
-            let size = self.in_buffer.read_from(&mut self.stream)?;
+            let size = self.in_buffer.prepare_reserve(MIN_READ)
+                .with_limit(usize::max_value())
+                .map_err(|_| Error::Capacity("Incoming TCP buffer is full".into()))?
+                .read_from(&mut self.stream)?;
             if size == 0 {
                 trace!("no frame received");
                 return Ok(None)