👷 Extract "USE" to a global const variable

app.go

@@ -297,7 +297,7 @@ func (app *App) Use(args ...interface{}) *Route {
 			log.Fatalf("Use: Invalid Handler %v", reflect.TypeOf(arg))
 		}
 	}
-	return app.register("USE", prefix, handlers...)
+	return app.register(methodUse, prefix, handlers...)
 }
 
 // Get registers a route for GET methods that requests a representation
@@ -375,7 +375,7 @@ func (app *App) All(path string, handlers ...Handler) []*Route {
 // Group is used for Routes with common prefix to define a new sub-router with optional middleware.
 func (app *App) Group(prefix string, handlers ...Handler) *Group {
 	if len(handlers) > 0 {
-		app.register("USE", prefix, handlers...)
+		app.register(methodUse, prefix, handlers...)
 	}
 	return &Group{prefix: prefix, app: app}
 }
@@ -408,10 +408,10 @@ func (app *App) Routes() []*Route {
 				continue
 			}
 			// Don't duplicate USE routes
-			if app.stack[m][r].Method == "USE" {
+			if app.stack[m][r].Method == methodUse {
 				duplicate := false
 				for i := range routes {
-					if routes[i].Method == "USE" && routes[i].Name == app.stack[m][r].Name {
+					if routes[i].Method == methodUse && routes[i].Name == app.stack[m][r].Name {
 						duplicate = true
 					}
 				}

group.go

@@ -35,7 +35,7 @@ func (grp *Group) Use(args ...interface{}) *Route {
 			log.Fatalf("Use: Invalid Handler %v", reflect.TypeOf(arg))
 		}
 	}
-	return grp.app.register("USE", getGroupPath(grp.prefix, path), handlers...)
+	return grp.app.register(methodUse, getGroupPath(grp.prefix, path), handlers...)
 }
 
 // Get registers a route for GET methods that requests a representation
@@ -114,7 +114,7 @@ func (grp *Group) All(path string, handlers ...Handler) []*Route {
 func (grp *Group) Group(prefix string, handlers ...Handler) *Group {
 	prefix = getGroupPath(grp.prefix, prefix)
 	if len(handlers) > 0 {
-		grp.app.register("USE", prefix, handlers...)
+		grp.app.register(methodUse, prefix, handlers...)
 	}
 	return grp.app.Group(prefix)
 }

router.go

@@ -146,7 +146,7 @@ func (app *App) register(method, pathRaw string, handlers ...Handler) *Route {
 	// Uppercase HTTP methods
 	method = utils.ToUpper(method)
 	// Check if the HTTP method is valid unless it's USE
-	if method != "USE" && methodInt(method) == 0 && method != MethodGet {
+	if methodInt(method) == -1 {
 		log.Fatalf("Add: Invalid HTTP method %s", method)
 	}
 	// A route requires atleast one ctx handler
@@ -172,7 +172,7 @@ func (app *App) register(method, pathRaw string, handlers ...Handler) *Route {
 		pathPretty = utils.TrimRight(pathPretty, '/')
 	}
 	// Is layer a middleware?
-	var isUse = method == "USE"
+	var isUse = method == methodUse
 	// Is path a direct wildcard?
 	var isStar = pathPretty == "/*"
 	// Is path a root slash?

utils.go

@@ -241,8 +241,10 @@ func methodInt(s string) int {
 		return 7
 	case MethodPatch:
 		return 8
+	case methodUse:
+		return 9
 	default:
-		return 0
+		return -1
 	}
 }
 
@@ -270,6 +272,7 @@ const (
 	MethodConnect = "CONNECT" // RFC 7231, 4.3.6
 	MethodOptions = "OPTIONS" // RFC 7231, 4.3.7
 	MethodTrace   = "TRACE"   // RFC 7231, 4.3.8
+	methodUse     = "USE"
 )
 
 // MIME types that are commonly used