Middlewares should use errors.As() instead of type assertion on HTTPError

- Helps consumers who want to wrap HTTPError, and other use cases

middleware/request_logger.go

@@ -2,9 +2,10 @@ package middleware
 
 import (
 	"errors"
-	"github.com/labstack/echo/v4"
 	"net/http"
 	"time"
+
+	"github.com/labstack/echo/v4"
 )
 
 // Example for `fmt.Printf`
@@ -264,7 +265,8 @@ func (config RequestLoggerConfig) ToMiddleware() (echo.MiddlewareFunc, error) {
 			if config.LogStatus {
 				v.Status = res.Status
 				if err != nil {
-					if httpErr, ok := err.(*echo.HTTPError); ok {
+					var httpErr *echo.HTTPError
+					if errors.As(err, &httpErr) {
 						v.Status = httpErr.Code
 					}
 				}

middleware/static.go

@@ -1,6 +1,7 @@
 package middleware
 
 import (
+	"errors"
 	"fmt"
 	"html/template"
 	"net/http"
@@ -196,8 +197,8 @@ func StaticWithConfig(config StaticConfig) echo.MiddlewareFunc {
 					return err
 				}
 
-				he, ok := err.(*echo.HTTPError)
-				if !(ok && config.HTML5 && he.Code == http.StatusNotFound) {
+				var he *echo.HTTPError
+				if !(errors.As(err, &he) && config.HTML5 && he.Code == http.StatusNotFound) {
 					return err
 				}