refactor(headers): Use macros for headers where possible

src/header/common/referer.rs

@@ -1,7 +1,3 @@
-use header::{Header, HeaderFormat};
-use std::fmt;
-use header::parsing::from_one_raw_str;
-
 /// The `Referer` header.
 ///
 /// The Referer header is used by user agents to inform server about
@@ -13,22 +9,8 @@ use header::parsing::from_one_raw_str;
 #[derive(Clone, PartialEq, Debug)]
 pub struct Referer(pub String);
 
-deref!(Referer => String);
-
-impl Header for Referer {
-    fn header_name() -> &'static str {
-        "Referer"
-    }
-
-    fn parse_header(raw: &[Vec<u8>]) -> Option<Referer> {
-        from_one_raw_str(raw).map(|s| Referer(s))
-    }
-}
-
-impl HeaderFormat for Referer {
-    fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&self.0, fmt)
-    }
-}
+impl_header!(Referer,
+             "Referer",
+             String);
 
 bench_header!(bench, Referer, { vec![b"http://foo.com/hello:3000".to_vec()] });