Added echo.HandlerFunc to handlers

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

README.md

@@ -16,8 +16,9 @@ Echo is a fast HTTP router (zero memory allocation) and micro web framework in G
 		- `func(http.ResponseWriter, *http.Request)`
 		- `func(http.ResponseWriter, *http.Request) error`
 	- Handler
-		- `func(*echo.Context)`
+		- `echo.HandlerFunc`
 		- `func(*echo.Context) error`
+		- `func(*echo.Context)`
 		- `http.Handler`
 		- `http.HandlerFunc`
 		- `func(http.ResponseWriter, *http.Request)`
@@ -110,7 +111,7 @@ func main() {
 ## Contribute
 
 **Use issues for everything**
- 
+
 - Report problems
 - Discuss before sending pull request
 - Suggest new features

echo.go

@@ -398,13 +398,15 @@ func wrapM(m Middleware) MiddlewareFunc {
 // wraps Handler
 func wrapH(h Handler) HandlerFunc {
 	switch h := h.(type) {
+	case HandlerFunc:
+		return h
+	case func(*Context) error:
+		return h
 	case func(*Context):
 		return func(c *Context) error {
 			h(c)
 			return nil
 		}
-	case func(*Context) error:
-		return h
 	case http.Handler, http.HandlerFunc:
 		return func(c *Context) error {
 			h.(http.Handler).ServeHTTP(c.Response, c.Request)

echo_test.go

@@ -121,7 +121,7 @@ func TestEchoMiddleware(t *testing.T) {
 func TestEchoHandler(t *testing.T) {
 	e := New()
 
-	// func(*echo.Context)
+	// func(*echo.Context) error
 	e.Get("/1", func(c *Context) {
 		c.String(http.StatusOK, "1")
 	})
@@ -132,7 +132,7 @@ func TestEchoHandler(t *testing.T) {
 		t.Error("body should be 1")
 	}
 
-	// func(*echo.Context) error
+	// HandlerFunc
 	e.Get("/2", func(c *Context) {
 		c.String(http.StatusOK, "2")
 	})
@@ -143,10 +143,10 @@ func TestEchoHandler(t *testing.T) {
 		t.Error("body should be 2")
 	}
 
-	// http.Handler/http.HandlerFunc
-	e.Get("/3", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Write([]byte("3"))
-	}))
+	// func(*echo.Context)
+	e.Get("/3", func(c *Context) {
+		c.String(http.StatusOK, "3")
+	})
 	w = httptest.NewRecorder()
 	r, _ = http.NewRequest(GET, "/3", nil)
 	e.ServeHTTP(w, r)
@@ -154,10 +154,10 @@ func TestEchoHandler(t *testing.T) {
 		t.Error("body should be 3")
 	}
 
-	// func(http.ResponseWriter, *http.Request)
-	e.Get("/4", func(w http.ResponseWriter, r *http.Request) {
+	// http.Handler/http.HandlerFunc
+	e.Get("/4", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte("4"))
-	})
+	}))
 	w = httptest.NewRecorder()
 	r, _ = http.NewRequest(GET, "/4", nil)
 	e.ServeHTTP(w, r)
@@ -165,10 +165,9 @@ func TestEchoHandler(t *testing.T) {
 		t.Error("body should be 4")
 	}
 
-	// func(http.ResponseWriter, *http.Request) error
-	e.Get("/5", func(w http.ResponseWriter, r *http.Request) error {
+	// func(http.ResponseWriter, *http.Request)
+	e.Get("/5", func(w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte("5"))
-		return nil
 	})
 	w = httptest.NewRecorder()
 	r, _ = http.NewRequest(GET, "/5", nil)
@@ -176,6 +175,18 @@ func TestEchoHandler(t *testing.T) {
 	if w.Body.String() != "5" {
 		t.Error("body should be 5")
 	}
+
+	// func(http.ResponseWriter, *http.Request) error
+	e.Get("/6", func(w http.ResponseWriter, r *http.Request) error {
+		w.Write([]byte("6"))
+		return nil
+	})
+	w = httptest.NewRecorder()
+	r, _ = http.NewRequest(GET, "/6", nil)
+	e.ServeHTTP(w, r)
+	if w.Body.String() != "6" {
+		t.Error("body should be 6")
+	}
 }
 
 func TestEchoGroup(t *testing.T) {

website/docs/index.md

@@ -22,8 +22,9 @@ Echo is a fast HTTP router (zero memory allocation) and micro web framework in G
 		- `func(http.ResponseWriter, *http.Request)`
 		- `func(http.ResponseWriter, *http.Request) error`
 	- Handler
-		- `func(*echo.Context)`
+		- `echo.HandlerFunc`
 		- `func(*echo.Context) error`
+		- `func(*echo.Context)`
 		- `http.Handler`
 		- `http.HandlerFunc`
 		- `func(http.ResponseWriter, *http.Request)`
@@ -112,7 +113,7 @@ Hello, World! on the page.
 ## Contribute
 
 **Use issues for everything**
- 
+
 - Report problems
 - Discuss before sending pull request
 - Suggest new features