fix(header): fix fmt_header outputs of several headers

Closes #246

src/header/common/cache_control.rs

@@ -72,7 +72,7 @@ pub enum CacheDirective {
 impl fmt::String for CacheDirective {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         use self::CacheDirective::*;
-        match *self {
+        fmt::String::fmt(match *self {
             NoCache => "no-cache",
             NoStore => "no-store",
             NoTransform => "no-transform",
@@ -91,7 +91,7 @@ impl fmt::String for CacheDirective {
             Extension(ref name, None) => &name[],
             Extension(ref name, Some(ref arg)) => return write!(f, "{}={}", name, arg),
 
-        }.fmt(f)
+        }, f)
     }
 }
 

src/header/common/connection.rs

@@ -1,5 +1,5 @@
 use header::{Header, HeaderFormat};
-use std::fmt::{self, Show};
+use std::fmt;
 use std::str::FromStr;
 use header::shared::util::{from_comma_delimited, fmt_comma_delimited};
 
@@ -12,7 +12,7 @@ pub struct Connection(pub Vec<ConnectionOption>);
 deref!(Connection => Vec<ConnectionOption>);
 
 /// Values that can be in the `Connection` header.
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Show)]
 pub enum ConnectionOption {
     /// The `keep-alive` connection value.
     KeepAlive,
@@ -49,12 +49,6 @@ impl fmt::String for ConnectionOption {
     }
 }
 
-impl fmt::Show for ConnectionOption {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-		self.to_string().fmt(fmt)
-	}
-}
-
 impl Header for Connection {
     fn header_name(_: Option<Connection>) -> &'static str {
         "Connection"

src/header/common/content_type.rs

@@ -1,5 +1,5 @@
 use header::{Header, HeaderFormat};
-use std::fmt::{self, String};
+use std::fmt;
 use header::shared::util::from_one_raw_str;
 use mime::Mime;
 
@@ -24,8 +24,7 @@ impl Header for ContentType {
 
 impl HeaderFormat for ContentType {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let ContentType(ref value) = *self;
-        value.fmt(fmt)
+        fmt::String::fmt(&self.0, fmt)
     }
 }
 

src/header/common/date.rs

@@ -1,4 +1,4 @@
-use std::fmt::{self, Show};
+use std::fmt;
 use std::str::FromStr;
 use time::Tm;
 use header::{Header, HeaderFormat};
@@ -7,7 +7,7 @@ use header::shared::time::tm_from_str;
 
 // Egh, replace as soon as something better than time::Tm exists.
 /// The `Date` header field.
-#[derive(Copy, PartialEq, Clone)]
+#[derive(Copy, PartialEq, Clone, Show)]
 pub struct Date(pub Tm);
 
 deref!(Date => Tm);
@@ -25,11 +25,12 @@ impl Header for Date {
 
 impl HeaderFormat for Date {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let tm = **self;
-        match tm.tm_utcoff {
-            0 => tm.rfc822().fmt(fmt),
-            _ => tm.to_utc().rfc822().fmt(fmt)
-        }
+        let tm = self.0;
+        let tm = match tm.tm_utcoff {
+            0 => tm,
+            _ => tm.to_utc(),
+        };
+        fmt::String::fmt(&tm.rfc822(), fmt)
     }
 }
 

src/header/common/expires.rs

@@ -1,4 +1,4 @@
-use std::fmt::{self, Show};
+use std::fmt;
 use std::str::FromStr;
 use time::Tm;
 use header::{Header, HeaderFormat};
@@ -6,7 +6,7 @@ use header::shared::util::from_one_raw_str;
 use header::shared::time::tm_from_str;
 
 /// The `Expires` header field.
-#[derive(Copy, PartialEq, Clone)]
+#[derive(Copy, PartialEq, Clone, Show)]
 pub struct Expires(pub Tm);
 
 deref!(Expires => Tm);
@@ -24,11 +24,12 @@ impl Header for Expires {
 
 impl HeaderFormat for Expires {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let tm = **self;
-        match tm.tm_utcoff {
-            0 => tm.rfc822().fmt(fmt),
-            _ => tm.to_utc().rfc822().fmt(fmt)
-        }
+        let tm = self.0;
+        let tm = match tm.tm_utcoff {
+            0 => tm,
+            _ => tm.to_utc(),
+        };
+        fmt::String::fmt(&tm.rfc822(), fmt)
     }
 }
 

src/header/common/if_modified_since.rs

@@ -1,4 +1,4 @@
-use std::fmt::{self, Show};
+use std::fmt;
 use std::str::FromStr;
 use time::Tm;
 use header::{Header, HeaderFormat};
@@ -6,7 +6,7 @@ use header::shared::util::from_one_raw_str;
 use header::shared::time::tm_from_str;
 
 /// The `If-Modified-Since` header field.
-#[derive(Copy, PartialEq, Clone)]
+#[derive(Copy, PartialEq, Clone, Show)]
 pub struct IfModifiedSince(pub Tm);
 
 deref!(IfModifiedSince => Tm);
@@ -24,11 +24,12 @@ impl Header for IfModifiedSince {
 
 impl HeaderFormat for IfModifiedSince {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let tm = **self;
-        match tm.tm_utcoff {
-            0 => tm.rfc822().fmt(fmt),
-            _ => tm.to_utc().rfc822().fmt(fmt)
-        }
+        let tm = self.0;
+        let tm = match tm.tm_utcoff {
+            0 => tm,
+            _ => tm.to_utc(),
+        };
+        fmt::String::fmt(&tm.rfc822(), fmt)
     }
 }
 

src/header/common/last_modified.rs

@@ -1,4 +1,4 @@
-use std::fmt::{self, Show};
+use std::fmt;
 use std::str::FromStr;
 use time::Tm;
 use header::{Header, HeaderFormat};
@@ -6,7 +6,7 @@ use header::shared::util::from_one_raw_str;
 use header::shared::time::tm_from_str;
 
 /// The `LastModified` header field.
-#[derive(Copy, PartialEq, Clone)]
+#[derive(Copy, PartialEq, Clone, Show)]
 pub struct LastModified(pub Tm);
 
 deref!(LastModified => Tm);
@@ -24,11 +24,12 @@ impl Header for LastModified {
 
 impl HeaderFormat for LastModified {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let tm = **self;
-        match tm.tm_utcoff {
-            0 => tm.rfc822().fmt(fmt),
-            _ => tm.to_utc().rfc822().fmt(fmt)
-        }
+        let tm = self.0;
+        let tm = match tm.tm_utcoff {
+            0 => tm,
+            _ => tm.to_utc(),
+        };
+        fmt::String::fmt(&tm.rfc822(), fmt)
     }
 }
 

src/header/common/location.rs

@@ -1,5 +1,5 @@
 use header::{Header, HeaderFormat};
-use std::fmt::{self, Show};
+use std::fmt;
 use header::shared::util::from_one_raw_str;
 
 /// The `Location` header.
@@ -30,8 +30,7 @@ impl Header for Location {
 
 impl HeaderFormat for Location {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let Location(ref value) = *self;
-        value.fmt(fmt)
+        fmt.write_str(&*self.0)
     }
 }
 

src/header/common/server.rs

@@ -1,5 +1,5 @@
 use header::{Header, HeaderFormat};
-use std::fmt::{self, Show};
+use std::fmt;
 use header::shared::util::from_one_raw_str;
 
 /// The `Server` header field.
@@ -22,8 +22,7 @@ impl Header for Server {
 
 impl HeaderFormat for Server {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let Server(ref value) = *self;
-        value.fmt(fmt)
+        fmt.write_str(&*self.0)
     }
 }
 

src/header/common/transfer_encoding.rs

@@ -33,7 +33,7 @@ deref!(TransferEncoding => Vec<Encoding>);
 /// # use hyper::header::Headers;
 /// # let mut headers = Headers::new();
 /// headers.set(TransferEncoding(vec![Gzip, Chunked]));
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Show)]
 pub enum Encoding {
     /// The `chunked` encoding.
     Chunked,
@@ -59,12 +59,6 @@ impl fmt::String for Encoding {
     }
 }
 
-impl fmt::Show for Encoding {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-		self.to_string().fmt(fmt)
-	}
-}
-
 impl FromStr for Encoding {
     fn from_str(s: &str) -> Option<Encoding> {
         match s {

src/header/common/upgrade.rs

@@ -1,5 +1,5 @@
 use header::{Header, HeaderFormat};
-use std::fmt::{self, Show};
+use std::fmt;
 use std::str::FromStr;
 use header::shared::util::{from_comma_delimited, fmt_comma_delimited};
 
@@ -12,7 +12,7 @@ pub struct Upgrade(pub Vec<Protocol>);
 deref!(Upgrade => Vec<Protocol>);
 
 /// Protocol values that can appear in the Upgrade header.
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Show)]
 pub enum Protocol {
     /// The websocket protocol.
     WebSocket,
@@ -38,12 +38,6 @@ impl fmt::String for Protocol {
     }
 }
 
-impl fmt::Show for Protocol {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        self.to_string().fmt(fmt)
-    }
-}
-
 impl Header for Upgrade {
     fn header_name(_: Option<Upgrade>) -> &'static str {
         "Upgrade"