Added MiddlewareFunc to the list of supported middleware, #47.

Signed-off-by: Vishal Rana <vr@labstack.com>

echo.go

@@ -349,6 +349,19 @@ func (e *Echo) RunTLSServer(server *http.Server, certFile, keyFile string) {
 // wraps Middleware
 func wrapM(m Middleware) MiddlewareFunc {
 	switch m := m.(type) {
+	case MiddlewareFunc:
+		return m
+	case func(HandlerFunc) HandlerFunc:
+		return m
+	case func(*Context) *HTTPError:
+		return func(h HandlerFunc) HandlerFunc {
+			return func(c *Context) *HTTPError {
+				if he := m(c); he != nil {
+					return he
+				}
+				return h(c)
+			}
+		}
 	case func(*Context):
 		return func(h HandlerFunc) HandlerFunc {
 			return func(c *Context) *HTTPError {
@@ -359,17 +372,6 @@ func wrapM(m Middleware) MiddlewareFunc {
 				return nil
 			}
 		}
-	case func(*Context) *HTTPError:
-		return func(h HandlerFunc) HandlerFunc {
-			return func(c *Context) *HTTPError {
-				if he := m(c); he != nil {
-					return he
-				}
-				return h(c)
-			}
-		}
-	case func(HandlerFunc) HandlerFunc:
-		return m
 	case func(http.Handler) http.Handler:
 		return func(h HandlerFunc) HandlerFunc {
 			return func(c *Context) (he *HTTPError) {
@@ -432,15 +434,15 @@ func wrapH(h Handler) HandlerFunc {
 			h.(http.Handler).ServeHTTP(c.Response, c.Request)
 			return nil
 		}
+	case func(http.ResponseWriter, *http.Request) *HTTPError:
+		return func(c *Context) *HTTPError {
+			return h(c.Response, c.Request)
+		}
 	case func(http.ResponseWriter, *http.Request):
 		return func(c *Context) *HTTPError {
 			h(c.Response, c.Request)
 			return nil
 		}
-	case func(http.ResponseWriter, *http.Request) *HTTPError:
-		return func(c *Context) *HTTPError {
-			return h(c.Response, c.Request)
-		}
 	default:
 		panic("echo: unknown handler")
 	}

echo_test.go

@@ -54,51 +54,59 @@ func TestEchoMiddleware(t *testing.T) {
 	e := New()
 	b := new(bytes.Buffer)
 
-	// func(*echo.Context)
-	e.Use(func(c *Context) {
-		b.WriteString("a")
-	})
-
-	// func(*echo.Context) *HTTPError
-	e.Use(func(c *Context) *HTTPError {
-		b.WriteString("b")
-		return nil
-	})
+	// MiddlewareFunc
+	e.Use(MiddlewareFunc(func(h HandlerFunc) HandlerFunc {
+		return func(c *Context) *HTTPError {
+			b.WriteString("a")
+			return h(c)
+		}
+	}))
 
 	// func(echo.HandlerFunc) (echo.HandlerFunc, error)
 	e.Use(func(h HandlerFunc) HandlerFunc {
 		return func(c *Context) *HTTPError {
-			b.WriteString("c")
+			b.WriteString("b")
 			return h(c)
 		}
 	})
 
-	// http.HandlerFunc
-	e.Use(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		b.WriteString("d")
-	}))
+	// func(*echo.Context) *HTTPError
+	e.Use(func(c *Context) *HTTPError {
+		b.WriteString("c")
+		return nil
+	})
 
-	// http.Handler
-	e.Use(http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		b.WriteString("e")
-	})))
+	// func(*echo.Context)
+	e.Use(func(c *Context) {
+		b.WriteString("d")
+	})
 
 	// func(http.Handler) http.Handler
 	e.Use(func(h http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			b.WriteString("f")
+			b.WriteString("e")
 			h.ServeHTTP(w, r)
 		})
 	})
 
+	// http.Handler
+	e.Use(http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b.WriteString("f")
+	})))
+
+	// http.HandlerFunc
+	e.Use(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b.WriteString("g")
+	}))
+
 	// func(http.ResponseWriter, *http.Request)
 	e.Use(func(w http.ResponseWriter, r *http.Request) {
-		b.WriteString("g")
+		b.WriteString("h")
 	})
 
 	// func(http.ResponseWriter, *http.Request) *HTTPError
 	e.Use(func(w http.ResponseWriter, r *http.Request) *HTTPError {
-		b.WriteString("h")
+		b.WriteString("i")
 		return nil
 	})
 
@@ -110,8 +118,8 @@ func TestEchoMiddleware(t *testing.T) {
 	w := httptest.NewRecorder()
 	r, _ := http.NewRequest(GET, "/hello", nil)
 	e.ServeHTTP(w, r)
-	if b.String() != "abcdefgh" {
-		t.Errorf("buffer should be abcdefgh, found %s", b.String())
+	if b.String() != "abcdefghi" {
+		t.Errorf("buffer should be abcdefghi, found %s", b.String())
 	}
 	if w.Body.String() != "world" {
 		t.Error("body should be world")

router_test.go

@@ -535,7 +535,6 @@ func TestRouterPriority(t *testing.T) {
 	}
 }
 
-
 func TestRouterParamNames(t *testing.T) {
 	r := New().Router
 	b := new(bytes.Buffer)