diff --git a/src/header/common/access_control_allow_origin.rs b/src/header/common/access_control_allow_origin.rs
index bf84b20f..03aa31fb 100644
--- a/src/header/common/access_control_allow_origin.rs
+++ b/src/header/common/access_control_allow_origin.rs
@@ -52,9 +52,8 @@ impl header::Header for AccessControlAllowOrigin {
 impl header::HeaderFormat for AccessControlAllowOrigin {
     fn fmt_header(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {
-            AccessControlAllowOrigin::Any => write!(f, "*"),
-            AccessControlAllowOrigin::Value(ref url) =>
-                write!(f, "{}", url)
+            AccessControlAllowOrigin::Any => f.write_str("*"),
+            AccessControlAllowOrigin::Value(ref url) => fmt::Display::fmt(url, f)
         }
     }
 }
diff --git a/src/header/common/authorization.rs b/src/header/common/authorization.rs
index 9ba2a04a..48a89c0f 100644
--- a/src/header/common/authorization.rs
+++ b/src/header/common/authorization.rs
@@ -45,12 +45,11 @@ impl<S: Scheme + Any> Header for Authorization<S> where <S as FromStr>::Err: 'st
 }
 
 impl<S: Scheme + Any> HeaderFormat for Authorization<S> where <S as FromStr>::Err: 'static {
-    fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match <S as Scheme>::scheme() {
-            Some(scheme) => try!(write!(fmt, "{} ", scheme)),
-            None => ()
+    fn fmt_header(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if let Some(scheme) = <S as Scheme>::scheme() {
+            try!(write!(f, "{} ", scheme))
         };
-        self.0.fmt_scheme(fmt)
+        self.0.fmt_scheme(f)
     }
 }
 
@@ -70,7 +69,7 @@ impl Scheme for String {
     }
 
     fn fmt_scheme(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self)
+        fmt::Display::fmt(self, f)
     }
 }
 
@@ -190,4 +189,3 @@ mod tests {
 
 bench_header!(raw, Authorization<String>, { vec![b"foo bar baz".to_vec()] });
 bench_header!(basic, Authorization<Basic>, { vec![b"Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==".to_vec()] });
-
diff --git a/src/header/common/cache_control.rs b/src/header/common/cache_control.rs
index f1def9e1..93f5e228 100644
--- a/src/header/common/cache_control.rs
+++ b/src/header/common/cache_control.rs
@@ -19,7 +19,7 @@ impl Header for CacheControl {
             .filter_map(|line| from_one_comma_delimited(&line[..]))
             .collect::<Vec<Vec<CacheDirective>>>()
             .concat();
-        if directives.len() > 0 {
+        if !directives.is_empty() {
             Some(CacheControl(directives))
         } else {
             None
diff --git a/src/header/common/pragma.rs b/src/header/common/pragma.rs
index c8e5ee7a..a8ddaf04 100644
--- a/src/header/common/pragma.rs
+++ b/src/header/common/pragma.rs
@@ -33,7 +33,6 @@ impl Header for Pragma {
         parsing::from_one_raw_str(raw).and_then(|s: String| {
             let slice = &s.to_ascii_lowercase()[..];
             match slice {
-                "" => None,
                 "no-cache" => Some(Pragma::NoCache),
                 _ => Some(Pragma::Ext(s)),
             }
@@ -58,4 +57,6 @@ fn test_parse_header() {
     let c: Pragma = Header::parse_header([b"FoObar".to_vec()].as_ref()).unwrap();
     let d = Pragma::Ext("FoObar".to_string());
     assert_eq!(c, d);
+    let e: Option<Pragma> = Header::parse_header([b"".to_vec()].as_ref());
+    assert_eq!(e, None);
 }
diff --git a/src/header/common/set_cookie.rs b/src/header/common/set_cookie.rs
index 419e4c8f..c7c35f4f 100644
--- a/src/header/common/set_cookie.rs
+++ b/src/header/common/set_cookie.rs
@@ -22,16 +22,12 @@ impl Header for SetCookie {
 
     fn parse_header(raw: &[Vec<u8>]) -> Option<SetCookie> {
         let mut set_cookies = Vec::with_capacity(raw.len());
-        for set_cookies_raw in raw.iter() {
-            match from_utf8(&set_cookies_raw[..]) {
-                Ok(s) if !s.is_empty() => {
-                    match s.parse() {
-                        Ok(cookie) => set_cookies.push(cookie),
-                        Err(_) => ()
-                    }
-                },
-                _ => ()
-            };
+        for set_cookies_raw in raw {
+            if let Ok(s) = from_utf8(&set_cookies_raw[..]) {
+                if let Ok(cookie) = s.parse() {
+                    set_cookies.push(cookie);
+                }
+            }
         }
 
         if !set_cookies.is_empty() {
diff --git a/src/header/mod.rs b/src/header/mod.rs
index 739ab529..942b282c 100644
--- a/src/header/mod.rs
+++ b/src/header/mod.rs
@@ -252,10 +252,7 @@ impl<'a> Iterator for HeadersItems<'a> {
     type Item = HeaderView<'a>;
 
     fn next(&mut self) -> Option<HeaderView<'a>> {
-        match self.inner.next() {
-            Some((k, v)) => Some(HeaderView(k, v)),
-            None => None
-        }
+        self.inner.next().map(|(k, v)| HeaderView(k, v))
     }
 }
 
diff --git a/src/header/parsing.rs b/src/header/parsing.rs
index 07ded6c5..957a3f9b 100644
--- a/src/header/parsing.rs
+++ b/src/header/parsing.rs
@@ -9,10 +9,12 @@ pub fn from_one_raw_str<T: str::FromStr>(raw: &[Vec<u8>]) -> Option<T> {
         return None;
     }
     // we JUST checked that raw.len() == 1, so raw[0] WILL exist.
-    match str::from_utf8(&raw[0][..]) {
-        Ok(s) => str::FromStr::from_str(s).ok(),
-        Err(_) => None
+    if let Ok(s) = str::from_utf8(&raw[0][..]) {
+        if s != "" {
+            return str::FromStr::from_str(s).ok();
+        }
     }
+    None
 }
 
 /// Reads a comma-delimited raw header into a Vec.
diff --git a/src/header/shared/httpdate.rs b/src/header/shared/httpdate.rs
index a61cd329..f89b56db 100644
--- a/src/header/shared/httpdate.rs
+++ b/src/header/shared/httpdate.rs
@@ -46,12 +46,7 @@ impl FromStr for HttpDate {
 
 impl Display for HttpDate {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let tm = self.0;
-        let tm = match tm.tm_utcoff {
-            0 => tm,
-            _ => tm.to_utc(),
-        };
-        fmt::Display::fmt(&tm.rfc822(), f)
+        fmt::Display::fmt(&self.0.to_utc().rfc822(), f)
     }
 }
 
diff --git a/src/http.rs b/src/http.rs
index 39befa5f..97c58ddc 100644
--- a/src/http.rs
+++ b/src/http.rs
@@ -300,7 +300,7 @@ impl<W: Write> Write for HttpWriter<W> {
                 }
             },
             EmptyWriter(..) => {
-                if msg.len() != 0 {
+                if !msg.is_empty() {
                     error!("Cannot include a body with this kind of message");
                 }
                 Ok(0)
@@ -354,7 +354,7 @@ fn parse<R: Read, T: TryParse<Subject=I>, I>(rdr: &mut BufReader<R>) -> HttpResu
             _partial => ()
         }
         match try!(rdr.read_into_buf()) {
-            0 if rdr.get_buf().len() == 0 => {
+            0 if rdr.get_buf().is_empty() => {
                 return Err(HttpIoError(io::Error::new(
                     io::ErrorKind::ConnectionAborted,
                     "Connection closed"