#23 Handle HEAD requests (#31)

Handle  HTTP HEAD and fall back to HTTP GET implementation if HEAD implementation is not present

Author: DeltaManiac

src/router.rs

@@ -25,9 +25,14 @@ impl<Data> Router<Data> {
         path: &'a str,
         method: &http::Method,
     ) -> Option<(&'a BoxedEndpoint<Data>, RouteMatch<'a>)> {
-        self.table
-            .route(path)
-            .and_then(|(r, p)| Some((r.endpoints.get(method)?, p)))
+        let (route, route_match) = self.table.route(path)?;
+        // If it is a HTTP HEAD request then check if there is a callback in the endpoints map
+        // if not then fallback to the behavior of HTTP GET else proceed as usual
+        if method == http::Method::HEAD && !route.endpoints.contains_key(&http::Method::HEAD) {
+            Some((route.endpoints.get(&http::Method::GET)?, route_match))
+        } else {
+            Some((route.endpoints.get(method)?, route_match))
+        }
     }
 }
 
@@ -62,6 +67,11 @@ impl<Data> Resource<Data> {
         self.method(http::Method::GET, ep)
     }
 
+    /// Add an endpoint for `HEAD` requests
+    pub fn head<T: Endpoint<Data, U>, U>(&mut self, ep: T) {
+        self.method(http::Method::HEAD, ep)
+    }
+
     /// Add an endpoint for `PUT` requests
     pub fn put<T: Endpoint<Data, U>, U>(&mut self, ep: T) {
         self.method(http::Method::PUT, ep)