New renderer interface #21

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

Author: vishr

context.go

@@ -48,7 +48,7 @@ func (c *Context) Bind(v interface{}) error {
 func (c *Context) Render(code int, name string, data interface{}) error {
 	c.Response.Header().Set(HeaderContentType, MIMEHTML+"; charset=utf-8")
 	c.Response.WriteHeader(code)
-	return c.echo.renderFunc(c.Response, name, data)
+	return c.echo.renderer.Render(c.Response, name, data)
 }
 
 // JSON sends an application/json response with status code.

context_test.go

@@ -12,7 +12,7 @@ func TestContext(t *testing.T) {
 	b, _ := json.Marshal(u1)
 	r, _ := http.NewRequest(POST, "/users/1", bytes.NewReader(b))
 	c := &Context{
-		Response: &response{writer: httptest.NewRecorder()},
+		Response: &response{Writer: httptest.NewRecorder()},
 		Request:  r,
 		params:   make(Params, 5),
 		store:    make(store),

echo.go

@@ -15,14 +15,16 @@ type (
 		middleware      []MiddlewareFunc
 		maxParam        byte
 		notFoundHandler HandlerFunc
-		renderFunc      RenderFunc
+		renderer        Renderer
 		pool            sync.Pool
 	}
 	Middleware     interface{}
 	MiddlewareFunc func(HandlerFunc) HandlerFunc
 	Handler        interface{}
 	HandlerFunc    func(*Context)
-	RenderFunc     func(io.Writer, string, interface{}) error
+	Renderer       interface {
+		Render(io.Writer, string, interface{}) error
+	}
 )
 
 const (
@@ -72,9 +74,6 @@ func New() (e *Echo) {
 		notFoundHandler: func(c *Context) {
 			http.Error(c.Response, http.StatusText(http.StatusNotFound), http.StatusNotFound)
 		},
-		renderFunc: func(w io.Writer, name string, data interface{}) (err error) {
-			return
-		},
 	}
 	e.Router = NewRouter(e)
 	e.pool.New = func() interface{} {
@@ -115,9 +114,9 @@ func (e *Echo) NotFoundHandler(h Handler) {
 	e.notFoundHandler = wrapH(h)
 }
 
-// RenderFunc sets a custom RenderFunc.
-func (e *Echo) RenderFunc(r RenderFunc) {
-	e.renderFunc = r
+// Renderer sets an HTML Renderer.
+func (e *Echo) Renderer(r Renderer) {
+	e.renderer = r
 }
 
 // Use adds handler to the middleware chain.
@@ -197,7 +196,8 @@ func (e *Echo) Index(file string) {
 }
 
 func (e *Echo) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	h, c, echo := e.Router.Find(r.Method, r.URL.Path)
+	c := e.pool.Get().(*Context)
+	h, echo := e.Router.Find(r.Method, r.URL.Path, c.params)
 	if echo != nil {
 		e = echo
 	}

response.go

@@ -7,15 +7,15 @@ import (
 
 type (
 	response struct {
-		writer    http.ResponseWriter
+		Writer    http.ResponseWriter
 		status    int
 		size      int
 		committed bool
 	}
 )
 
 func (r *response) Header() http.Header {
-	return r.writer.Header()
+	return r.Writer.Header()
 }
 
 func (r *response) WriteHeader(n int) {
@@ -25,12 +25,12 @@ func (r *response) WriteHeader(n int) {
 		return
 	}
 	r.status = n
-	r.writer.WriteHeader(n)
+	r.Writer.WriteHeader(n)
 	r.committed = true
 }
 
 func (r *response) Write(b []byte) (n int, err error) {
-	n, err = r.writer.Write(b)
+	n, err = r.Writer.Write(b)
 	r.size += n
 	return n, err
 }
@@ -44,6 +44,6 @@ func (r *response) Size() int {
 }
 
 func (r *response) reset(w http.ResponseWriter) {
-	r.writer = w
+	r.Writer = w
 	r.committed = false
 }

router.go

@@ -157,8 +157,7 @@ func lcp(a, b string) (i int) {
 	return
 }
 
-func (r *router) Find(method, path string) (h HandlerFunc, c *Context, echo *Echo) {
-	c = r.echo.pool.Get().(*Context)
+func (r *router) Find(method, path string, params Params) (h HandlerFunc, echo *Echo) {
 	cn := r.trees[method] // Current node as root
 	search := path
 	n := 0 // Param count
@@ -182,15 +181,15 @@ func (r *router) Find(method, path string) (h HandlerFunc, c *Context, echo *Ech
 				i, l := 0, len(search)
 				for ; i < l && search[i] != '/'; i++ {
 				}
-				p := c.params[:n+1]
+				p := params[:n+1]
 				p[n].Name = cn.prefix[1:]
 				p[n].Value = search[:i]
 				n++
 				search = search[i:]
 			} else if cn.has == cnode {
 				// Catch-all node
 				cn = cn.edges[0]
-				p := c.params[:n+1]
+				p := params[:n+1]
 				p[n].Name = "_name"
 				p[n].Value = search
 				search = "" // End search
@@ -215,8 +214,9 @@ func (r *router) Find(method, path string) (h HandlerFunc, c *Context, echo *Ech
 }
 
 func (r *router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	h, c, _ := r.Find(req.Method, req.URL.Path)
-	c.Response.writer = w
+	c := r.echo.pool.Get().(*Context)
+	h, _ := r.Find(req.Method, req.URL.Path, c.params)
+	c.Response.Writer = w
 	if h != nil {
 		h(c)
 	} else {