peta 0.0.3

Very small and simple http library
Documentation 
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use bytes::BytesMut;

use futures::try_ready;
use tokio::net::TcpStream;
use tokio::prelude::*;

use crate::request::Request;

/// Read from `tokio::io::ReadHalf<TcpStream>` and stream ready http requests
pub struct Http {
  reader: tokio::io::ReadHalf<TcpStream>,
  buffer: BytesMut,
}

impl Http {
  pub fn new(reader: tokio::io::ReadHalf<TcpStream>) -> Http {
    Http {
      reader,
      buffer: BytesMut::new(),
    }
  }

  fn read_buffer(&mut self) -> Poll<(), tokio::io::Error> {
    loop {
      self.buffer.reserve(512);
      let n = try_ready!(self.reader.read_buf(&mut self.buffer));

      if n == 0 {
        return Ok(Async::Ready(()));
      }
    }
  }
}

impl Stream for Http {
  type Item = Request;
  type Error = tokio::io::Error;

  fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
    let is_closed = self.read_buffer()?.is_ready();

    if is_closed {
      return Ok(Async::Ready(None));
    }

    if !self.buffer.is_empty() {
      match Request::decode(&mut self.buffer).expect("Could not create request") {
        Some(req) => {
          self.buffer.clear();
          return Ok(Async::Ready(Some(req)));
        }
        None => {}
      };
    }

    Ok(Async::NotReady)
  }
}