New type: ContentType. Parse ContentType from attribute.

Cargo.toml

@@ -13,4 +13,5 @@ members = [
   "examples/redirect",
   "examples/static_files",
   "examples/todo",
+  "examples/content_types",
 ]

lib/Cargo.toml

@@ -7,6 +7,7 @@ authors = ["Sergio Benitez <sb@sergio.bz>"]
 term-painter = "*"
 hyper = "*"
 url = "*"
+mime = "*"
 
 # [dependencies.hyper]
 # git = "https://github.com/hyperium/hyper.git"

lib/src/codegen.rs

@@ -1,10 +1,11 @@
-use method::Method;
-use handler::Handler;
+use ::{Method, Handler};
+use content_type::ContentType;
 
 pub struct StaticRouteInfo {
     pub method: Method,
     pub path: &'static str,
-    pub handler: Handler
+    pub content_type: ContentType,
+    pub handler: Handler,
 }
 
 pub struct StaticCatchInfo {

lib/src/content_type.rs

@@ -0,0 +1,78 @@
+pub use mime::{Mime, TopLevel, SubLevel};
+
+use std::str::FromStr;
+use mime::{Param};
+use self::TopLevel::{Text, Application};
+use self::SubLevel::{Json, Html};
+
+#[derive(Debug, Clone)]
+pub struct ContentType(pub TopLevel, pub SubLevel, pub Option<Vec<Param>>);
+
+impl ContentType {
+    #[inline(always)]
+    pub fn of(t: TopLevel, s: SubLevel) -> ContentType {
+        ContentType(t, s, None)
+    }
+
+    #[inline(always)]
+    pub fn any() -> ContentType {
+        ContentType::of(TopLevel::Star, SubLevel::Star)
+    }
+
+    pub fn is_json(&self) -> bool {
+        match *self {
+            ContentType(Application, Json, _) => true,
+            _ => false,
+        }
+    }
+
+    pub fn is_any(&self) -> bool {
+        match *self {
+            ContentType(TopLevel::Star, SubLevel::Star, None) => true,
+            _ => false,
+        }
+    }
+
+    pub fn is_ext(&self) -> bool {
+        if let TopLevel::Ext(_) = self.0 {
+            true
+        } else if let SubLevel::Ext(_) = self.1 {
+            true
+        } else {
+            false
+        }
+    }
+
+    pub fn is_html(&self) -> bool {
+        match *self {
+            ContentType(Text, Html, _) => true,
+            _ => false,
+        }
+    }
+}
+
+impl Into<Mime> for ContentType {
+    fn into(self) -> Mime {
+        Mime(self.0, self.1, self.2.unwrap_or_default())
+    }
+}
+
+impl From<Mime> for ContentType {
+    fn from(mime: Mime) -> ContentType {
+        let params = match mime.2.len() {
+            0 => None,
+            _ => Some(mime.2)
+        };
+
+        ContentType(mime.0, mime.1, params)
+    }
+}
+
+impl FromStr for ContentType {
+    type Err = ();
+
+    fn from_str(raw: &str) -> Result<ContentType, ()> {
+        let mime = Mime::from_str(raw)?;
+        Ok(ContentType::from(mime))
+    }
+}

lib/src/lib.rs

@@ -4,6 +4,7 @@
 extern crate term_painter;
 extern crate hyper;
 extern crate url;
+extern crate mime;
 
 mod method;
 mod error;
@@ -16,6 +17,7 @@ mod catcher;
 pub mod form;
 pub mod request;
 pub mod response;
+pub mod content_type;
 
 pub mod handler {
     use super::{Request, Response};
@@ -23,6 +25,7 @@ pub mod handler {
     pub type Handler = for<'r> fn(Request<'r>) -> Response<'r>;
 }
 
+pub use content_type::ContentType;
 pub use codegen::{StaticRouteInfo, StaticCatchInfo};
 pub use request::Request;
 pub use method::Method;

lib/src/router/route.rs

@@ -1,9 +1,10 @@
+use ::{Method, Handler, StaticRouteInfo};
+use content_type::ContentType;
+use super::{Collider, URI, URIBuf}; // :D
+
 use term_painter::ToStyle;
 use term_painter::Color::*;
-use method::Method;
-use super::{Collider, URI, URIBuf}; // :D
-use handler::Handler;
-use codegen::StaticRouteInfo;
+
 use std::fmt;
 use std::convert::From;
 
@@ -11,17 +12,19 @@ pub struct Route {
     pub method: Method,
     pub handler: Handler,
     pub path: URIBuf,
-    pub rank: isize
+    pub rank: isize,
+    pub content_type: ContentType,
 }
 
 impl Route {
-    pub fn ranked<S>(rank: isize, m: Method, path: S, handler: Handler)
+    pub fn ranked<S>(rank: isize, m: Method, path: S, handler: Handler, t: ContentType)
             -> Route where S: AsRef<str> {
         Route {
             method: m,
             path: URIBuf::from(path.as_ref()),
             handler: handler,
-            rank: rank
+            rank: rank,
+            content_type: t,
         }
     }
 
@@ -32,6 +35,7 @@ impl Route {
             handler: handler,
             rank: (!path.as_ref().contains('<') as isize),
             path: URIBuf::from(path.as_ref()),
+            content_type: ContentType::any(),
         }
     }
 

macros/src/meta_item_parser.rs

@@ -6,7 +6,7 @@ use syntax::codemap::{Span, Spanned, BytePos};
 use syntax::ptr::P;
 
 use utils::*;
-use rocket::Method;
+use rocket::{Method, ContentType};
 
 #[allow(dead_code)]
 const DEBUG: bool = true;
@@ -122,7 +122,7 @@ pub struct RouteParams {
     pub method: Spanned<Method>,
     pub path: KVSpanned<String>,
     pub form: Option<KVSpanned<String>>,
-    pub content_type: Option<KVSpanned<String>>,
+    pub content_type: Option<KVSpanned<ContentType>>,
 }
 
 pub trait RouteDecoratorExt {
@@ -206,7 +206,18 @@ impl<'a, 'c> RouteDecoratorExt for MetaItemParser<'a, 'c> {
         });
 
         let content_type = kv_pairs.get("content").and_then(|data| {
-            Some(data.clone().map(String::from))
+            if let Ok(ct) = ContentType::from_str(data.node) {
+                if ct.is_ext() {
+                    let msg = format!("'{}' is not a known content-type", data.node);
+                    self.ctxt.span_warn(data.v_span, &msg);
+                }
+
+                Some(data.clone().map(|_| ct))
+            } else {
+                let msg = format!("'{}' is not a valid content-type", data.node);
+                self.ctxt.span_err(data.v_span, &msg);
+                None
+            }
         });
 
         debug!("Found data: {:?}", content_type);

macros/src/route_decorator.rs

@@ -217,7 +217,11 @@ pub fn route_decorator(known_method: Option<Spanned<Method>>, ecx: &mut ExtCtxt,
             ::rocket::StaticRouteInfo {
                 method: $method,
                 path: $path,
-                handler: $route_fn_name
+                handler: $route_fn_name,
+                content_type: ::rocket::ContentType(
+                    ::rocket::content_type::TopLevel::Star,
+                    ::rocket::content_type::SubLevel::Star,
+                    None)
             };
     ).unwrap()));
 }