Moved WriteStatus, Fresh, and Streaming in to the net module.

src/net.rs

@@ -3,6 +3,23 @@ use std::io::{IoResult, Stream, Listener, Acceptor};
 use std::io::net::ip::{SocketAddr, Port};
 use std::io::net::tcp::{TcpStream, TcpListener, TcpAcceptor};
 
+/// The write-status indicating headers have not been written.
+pub struct Fresh;
+
+/// The write-status indicating headers have been written.
+pub struct Streaming;
+
+/// The write-status of a Request
+pub trait WriteStatus: Private {}
+impl WriteStatus for Fresh {}
+impl WriteStatus for Streaming {}
+
+// Only Fresh and Streaming can be WriteStatus
+#[doc(hidden)]
+trait Private {}
+impl Private for Fresh {}
+impl Private for Streaming {}
+
 /// An abstraction to listen for connections on a certain port.
 pub trait NetworkListener<S: NetworkStream, A: NetworkAcceptor<S>>: Listener<S, A> {
     /// Bind to a socket.