Dropped support for func(http.Handler) http.Handler middleware

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

examples/web/server.go

@@ -0,0 +1,115 @@
+package main
+
+import (
+	"io"
+	"net/http"
+
+	"html/template"
+
+	"github.com/labstack/echo"
+)
+
+type (
+	// Template provides HTML template rendering
+	Template struct {
+		templates *template.Template
+	}
+
+	user struct {
+		ID   string `json:"id"`
+		Name string `json:"name"`
+	}
+)
+
+var (
+	users map[string]user
+)
+
+// Render HTML
+func (t *Template) Render(w io.Writer, name string, data interface{}) error {
+	return t.templates.ExecuteTemplate(w, name, data)
+}
+
+func welcome(c *echo.Context) {
+	c.Render(http.StatusOK, "welcome", "Joe")
+}
+
+func createUser(c *echo.Context) error {
+	u := new(user)
+	if err := c.Bind(u); err != nil {
+		return err
+	}
+	users[u.ID] = *u
+	return c.JSON(http.StatusCreated, u)
+}
+
+func getUsers(c *echo.Context) error {
+	return c.JSON(http.StatusOK, users)
+}
+
+func getUser(c *echo.Context) error {
+	return c.JSON(http.StatusOK, users[c.P(0)])
+}
+
+func main() {
+	e := echo.New()
+
+	// Middleware
+	e.Use(echo.Logger)
+
+	// Serve index file
+	e.Index("public/index.html")
+
+	// Serve static files
+	e.Static("/scripts", "public/scripts")
+
+	//--------
+	// Routes
+	//--------
+	e.Post("/users", createUser)
+	e.Get("/users", getUsers)
+	e.Get("/users/:id", getUser)
+
+	//-----------
+	// Templates
+	//-----------
+	t := &Template{
+		// Cached templates
+		templates: template.Must(template.ParseFiles("public/views/welcome.html")),
+	}
+	e.Renderer(t)
+	e.Get("/welcome", welcome)
+
+	//-------
+	// Group
+	//-------
+
+	// Group with parent middleware
+	a := e.Group("/admin")
+	a.Use(func(c *echo.Context) {
+		// Security middleware
+	})
+	a.Get("", func(c *echo.Context) {
+		c.String(http.StatusOK, "Welcome admin!")
+	})
+
+	// Group with no parent middleware
+	g := e.Group("/files", func(c *echo.Context) {
+		// Security middleware
+	})
+	g.Get("", func(c *echo.Context) {
+		c.String(http.StatusOK, "Your files!")
+	})
+
+	// Start server
+	e.Run(":4444")
+}
+
+func init() {
+	users = map[string]user{
+		"1": user{
+			ID:   "1",
+			Name: "Wreck-It Ralph",
+		},
+	}
+}