feat: rest.WithChain to replace builtin middlewares (#2033)

* feat: rest.WithChain to replace builtin middlewares

* chore: add comments

* chore: refine code

rest/server.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"github.com/zeromicro/go-zero/core/logx"
+	"github.com/zeromicro/go-zero/rest/chain"
 	"github.com/zeromicro/go-zero/rest/handler"
 	"github.com/zeromicro/go-zero/rest/httpx"
 	"github.com/zeromicro/go-zero/rest/internal/cors"
@@ -95,13 +96,6 @@ func (s *Server) Use(middleware Middleware) {
 	s.ngin.use(middleware)
 }
 
-// DisableDefaultMiddlewares returns a RunOption that disables the builtin middlewares.
-func DisableDefaultMiddlewares() RunOption {
-	return func(svr *Server) {
-		svr.ngin.disableDefaultMiddlewares = true
-	}
-}
-
 // ToMiddleware converts the given handler to a Middleware.
 func ToMiddleware(handler func(next http.Handler) http.Handler) Middleware {
 	return func(handle http.HandlerFunc) http.HandlerFunc {
@@ -109,6 +103,14 @@ func ToMiddleware(handler func(next http.Handler) http.Handler) Middleware {
 	}
 }
 
+// WithChain returns a RunOption that uses the given chain to replace the default chain.
+// JWT auth middleware and the middlewares that added by svr.Use() will be appended.
+func WithChain(chn chain.Chain) RunOption {
+	return func(svr *Server) {
+		svr.ngin.chain = chn
+	}
+}
+
 // WithCors returns a func to enable CORS for given origin, or default to all origins (*).
 func WithCors(origin ...string) RunOption {
 	return func(server *Server) {