refactor(headers): Use header!() for CORS headers.

This is the last bunch of headers that should use the new macro. Moved them out of
their own folder so that the macro works. Changed them, so that they are more in
line with the other headers.

BREAKING CHANGE: `AccessControlAllowHeaders` and `AccessControlRequestHeaders` values
are case insensitive now. `AccessControlAllowOrigin` variants are now `Any` and
`Value` to match the other headers.

Author: pyfisch

src/header/common/access_control/allow_headers.rs

@@ -0,0 +1,11 @@
+use unicase::UniCase;
+
+header! {
+    #[doc="`Access-Control-Allow-Headers` header, part of"]
+    #[doc="[CORS](www.w3.org/TR/cors/#access-control-allow-headers-response-header)"]
+    #[doc=""]
+    #[doc="The `Access-Control-Allow-Headers` header indicates, as part of the"]
+    #[doc="response to a preflight request, which header field names can be used"]
+    #[doc="during the actual request."]
+    (AccessControlAllowHeaders, "Access-Control-Allow-Headers") => (UniCase<String>)*
+}

src/header/common/access_control/allow_methods.rs

@@ -0,0 +1,11 @@
+use method::Method;
+
+header! {
+    #[doc="`Access-Control-Allow-Methods` header, part of"]
+    #[doc="[CORS](www.w3.org/TR/cors/#access-control-allow-methods-response-header)"]
+    #[doc=""]
+    #[doc="The `Access-Control-Allow-Methods` header indicates, as part of the"]
+    #[doc="response to a preflight request, which methods can be used during the"]
+    #[doc="actual request."]
+    (AccessControlAllowMethods, "Access-Control-Allow-Methods") => (Method)*
+}

src/header/common/access_control/max_age.rs

@@ -1,8 +1,7 @@
-extern crate url;
-
 use std::fmt::{self};
 use std::str;
 
+use url::Url;
 use header;
 
 /// The `Access-Control-Allow-Origin` response header,
@@ -16,13 +15,12 @@ use header;
 #[derive(Clone, PartialEq, Debug)]
 pub enum AccessControlAllowOrigin {
     /// Allow all origins
-    AllowStar,
+    Any,
     /// Allow one particular origin
-    AllowOrigin(url::Url),
+    Value(Url),
 }
 
 impl header::Header for AccessControlAllowOrigin {
-    #[inline]
     fn header_name() -> &'static str {
         "Access-Control-Allow-Origin"
     }
@@ -32,10 +30,10 @@ impl header::Header for AccessControlAllowOrigin {
             match str::from_utf8(unsafe { &raw.get_unchecked(0)[..] }) {
                 Ok(s) => {
                     if s == "*" {
-                        Some(AccessControlAllowOrigin::AllowStar)
+                        Some(AccessControlAllowOrigin::Any)
                     } else {
-                        url::Url::parse(s).ok().map(
-                            |url| AccessControlAllowOrigin::AllowOrigin(url))
+                        Url::parse(s).ok().map(
+                            |url| AccessControlAllowOrigin::Value(url))
                     }
                 },
                 _ => return None,
@@ -49,8 +47,8 @@ impl header::Header for AccessControlAllowOrigin {
 impl header::HeaderFormat for AccessControlAllowOrigin {
     fn fmt_header(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {
-            AccessControlAllowOrigin::AllowStar => write!(f, "*"),
-            AccessControlAllowOrigin::AllowOrigin(ref url) =>
+            AccessControlAllowOrigin::Any => write!(f, "*"),
+            AccessControlAllowOrigin::Value(ref url) =>
                 write!(f, "{}", url)
         }
     }

src/header/common/access_control/mod.rs

@@ -0,0 +1,8 @@
+header! {
+    #[doc="`Access-Control-Max-Age` header, part of"]
+    #[doc="[CORS](www.w3.org/TR/cors/#access-control-max-age-response-header)"]
+    #[doc=""]
+    #[doc="The `Access-Control-Max-Age` header indicates how long the results of a"]
+    #[doc="preflight request can be cached in a preflight result cache."]
+    (AccessControlMaxAge, "Access-Control-Max-Age") => [u32]
+}