Remove get and rename get_ref to get

Since `get_ref` (now `get`) takes `&self` there is no need
for a special cloning method.

src/client/request.rs

@@ -111,7 +111,7 @@ impl Request<Fresh> {
         let mut chunked = true;
         let mut len = 0;
 
-        match self.headers.get_ref::<common::ContentLength>() {
+        match self.headers.get::<common::ContentLength>() {
             Some(cl) => {
                 chunked = false;
                 len = cl.len();
@@ -122,7 +122,7 @@ impl Request<Fresh> {
         // cant do in match above, thanks borrowck
         if chunked {
             //TODO: use CollectionViews (when implemented) to prevent double hash/lookup
-            let encodings = match self.headers.get::<common::TransferEncoding>() {
+            let encodings = match self.headers.get::<common::TransferEncoding>().map(|h| h.clone()) {
                 Some(common::TransferEncoding(mut encodings)) => {
                     //TODO: check if chunked is already in encodings. use HashSet?
                     encodings.push(common::transfer_encoding::Chunked);

src/client/response.rs

@@ -33,7 +33,7 @@ impl Response {
         debug!("{}", headers);
 
         let body = if headers.has::<TransferEncoding>() {
-            match headers.get_ref::<TransferEncoding>() {
+            match headers.get::<TransferEncoding>() {
                 Some(&TransferEncoding(ref codings)) => {
                     if codings.len() > 1 {
                         debug!("TODO: #2 handle other codings: {}", codings);
@@ -49,7 +49,7 @@ impl Response {
                 None => unreachable!()
             }
         } else if headers.has::<ContentLength>() {
-            match headers.get_ref::<ContentLength>() {
+            match headers.get::<ContentLength>() {
                 Some(&ContentLength(len)) => SizedReader(stream, len),
                 None => unreachable!()
             }

src/header/mod.rs

@@ -118,20 +118,6 @@ impl Headers {
         self.data.insert(CaseInsensitive(Slice(header_name::<H>())), RWLock::new(Typed(box value as Box<Header + Send + Sync>)));
     }
 
-    /// Get a clone of the header field's value, if it exists.
-    ///
-    /// Example:
-    ///
-    /// ```
-    /// # use hyper::header::Headers;
-    /// # use hyper::header::common::ContentType;
-    /// # let mut headers = Headers::new();
-    /// let content_type = headers.get::<ContentType>();
-    /// ```
-    pub fn get<H: Header + Clone>(&self) -> Option<H> {
-        self.get_ref().map(|v: &H| v.clone())
-    }
-
     /// Access the raw value of a header, if it exists and has not
     /// been already parsed.
     ///
@@ -158,7 +144,7 @@ impl Headers {
     }
 
     /// Get a reference to the header field's value, if it exists.
-    pub fn get_ref<H: Header>(&self) -> Option<&H> {
+    pub fn get<H: Header>(&self) -> Option<&H> {
         self.data.find(&CaseInsensitive(Slice(header_name::<H>()))).and_then(|item| {
             let done = match *item.read() {
                 // Huge borrowck hack here, should be refactored to just return here.

src/server/request.rs

@@ -46,7 +46,7 @@ impl Request {
 
 
         let body = if headers.has::<ContentLength>() {
-            match headers.get_ref::<ContentLength>() {
+            match headers.get::<ContentLength>() {
                 Some(&ContentLength(len)) => SizedReader(stream, len),
                 None => unreachable!()
             }

src/server/response.rs

@@ -72,7 +72,7 @@ impl Response<Fresh> {
         let mut chunked = true;
         let mut len = 0;
 
-        match self.headers.get_ref::<common::ContentLength>() {
+        match self.headers.get::<common::ContentLength>() {
             Some(cl) => {
                 chunked = false;
                 len = cl.len();
@@ -83,7 +83,7 @@ impl Response<Fresh> {
         // cant do in match above, thanks borrowck
         if chunked {
             //TODO: use CollectionViews (when implemented) to prevent double hash/lookup
-            let encodings = match self.headers.get::<common::TransferEncoding>() {
+            let encodings = match self.headers.get::<common::TransferEncoding>().map(|h| h.clone()) {
                 Some(common::TransferEncoding(mut encodings)) => {
                     //TODO: check if chunked is already in encodings. use HashSet?
                     encodings.push(common::transfer_encoding::Chunked);