Echo: Can add NoRoute(h HandlerFunc, m ...MiddlewareFunc) to Group and Echo?

[runner-mei]

Description

Can add NoRoute(h HandlerFunc, m ...MiddlewareFunc) to Group and Echo?
There are NoRoute() in https://github.com/gin-gonic/gin.

NoRoute() usage:

package mai

func main() {
    engine := echo.New()
    engine.Use(middleware.Logger())
    engine.Use(middleware.Recover())
       engine.NoRoute(http.DefaultServeMux)


       q := engine.Group("/query")
       q.GET("/hello", func(ctx echo.Context) error {
           ctx.String(http.StatusOK "hi!")
       })
       q.NoRoute(func(ctx echo.Context) error {
           ctx.String(http.StatusNotFound, "not found with prefix is /query")
       })
}

[vishr]

What is the function of NoRoute? If you are looking for handling route not found requests look at https://echo.labstack.com/guide/error-handling. Echo#DefaultErrorHandler captures all the errors and it can also be customized.

[runner-mei]

NoRoute() have more advantage than ErrorHandler!

1. NoRoute() can add middleware handler, ErrorHandler can't.
2. NoRoute() more user-friendly。

NoRoute() example as follow:
````go
package mai

func main() {
engine := echo.New()
engine.Use(middleware.Logger())
engine.Use(middleware.Recover())
engine.NoRoute(http.DefaultServeMux)

   q := engine.Group("/query", authQuery) // authQueryis middleware handler,
   q.GET("/hello", func(ctx echo.Context) error {
       return ctx.String(http.StatusOK "hi!")
   })
   q.NoRoute(func(ctx echo.Context) error {
       return ctx.JSON(http.StatusOK, xxxx)
   }, auth) // auth is middleware


   cfg := engine.Group("/config", authConfig) // authConfig is middleware handler,
   cfg.GET("/hello", func(ctx echo.Context) error {
       return ctx.String(http.StatusOK "hi!")
   })
   cfg.NoRoute(func(ctx echo.Context) error {
       return  ctx.JSON(http.StatusOK, xxxx)
   })

}
````

ErrorHandler() example as follow:
````go
package mai

func main() {
engine := echo.New()
engine.Use(middleware.Logger())
engine.Use(middleware.Recover())

   q := engine.Group("/query", auth) // auth is middleware handler,
   q.GET("/hello", func(ctx echo.Context) error {
       return ctx.String(http.StatusOK "hi!")
   })
   cfg := engine.Group("/config", auth) // auth is middleware handler,
   cfg.GET("/hello", func(ctx echo.Context) error {
       return ctx.String(http.StatusOK "hi!")
   })


   engine.ErrorHandler = func(e error, ctx Context) error {
      if e == echo.ErrNotFound {
           if strings.Contains(ctx.Request().URL.Path, "/query") {

                //  hack! it isn't standard for run handler
                authQuery(ctx, func(ctx Context) {
                    return ctx.JSON(http.StatusOK, queryxxxx)
                } )
             return nil
           } else if strings.Contains(ctx.Request().URL.Path, "/config") {

                //  hack! it isn't standard for run handler
                authConfig(ctx, func(ctx Context) {
                    return ctx.JSON(http.StatusOK, configxxxx)
                } )
               return nil
           }
          http.DefaultServeMux.ServeHttp(ctx.Response(), ctx.Request())
          return nil
      }
  }

}
````

[bxcodec]

If you looking for example, you could see what gin does here http://godoc.org/github.com/gin-gonic/gin#Engine.NoRoute

It will return default 404 for un-registered routes 🙄

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.