refactor(http): move h1 and h2 into http module

src/http/mod.rs

@@ -0,0 +1,28 @@
+//! Pieces pertaining to the HTTP message protocol.
+use std::borrow::Cow;
+
+use header::Connection;
+use header::ConnectionOption::{KeepAlive, Close};
+use header::Headers;
+use version::HttpVersion;
+use version::HttpVersion::{Http10, Http11};
+
+pub use self::message::{HttpMessage, RequestHead, ResponseHead, Protocol};
+
+pub mod h1;
+pub mod h2;
+pub mod message;
+
+/// The raw status code and reason-phrase.
+#[derive(Clone, PartialEq, Debug)]
+pub struct RawStatus(pub u16, pub Cow<'static, str>);
+
+/// Checks if a connection should be kept alive.
+#[inline]
+pub fn should_keep_alive(version: HttpVersion, headers: &Headers) -> bool {
+    match (version, headers.get::<Connection>()) {
+        (Http10, Some(conn)) if !conn.contains(&KeepAlive) => false,
+        (Http11, Some(conn)) if conn.contains(&Close)  => false,
+        _ => true
+    }
+}