s3: use bucket in the domain

fix https://github.com/chrislusf/seaweedfs/issues/1405

weed/command/s3.go

@@ -151,6 +151,7 @@ func (s3opt *S3Options) startS3Server() bool {
 
 	_, s3ApiServer_err := s3api.NewS3ApiServer(router, &s3api.S3ApiServerOption{
 		Filer:            *s3opt.filer,
+		Port:             *s3opt.port,
 		FilerGrpcAddress: filerGrpcAddress,
 		Config:           *s3opt.config,
 		DomainName:       *s3opt.domainName,

weed/s3api/s3api_server.go

@@ -1,6 +1,7 @@
 package s3api
 
 import (
+	"fmt"
 	"net/http"
 
 	"github.com/gorilla/mux"
@@ -9,6 +10,7 @@ import (
 
 type S3ApiServerOption struct {
 	Filer            string
+	Port             int
 	FilerGrpcAddress string
 	Config           string
 	DomainName       string
@@ -37,7 +39,10 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 	apiRouter := router.PathPrefix("/").Subrouter()
 	var routers []*mux.Router
 	if s3a.option.DomainName != "" {
-		routers = append(routers, apiRouter.Host("{bucket:.+}."+s3a.option.DomainName).Subrouter())
+		routers = append(routers, apiRouter.Host(
+			fmt.Sprintf("%s.%s:%d", "{bucket:.+}", s3a.option.DomainName, s3a.option.Port)).Subrouter())
+		routers = append(routers, apiRouter.Host(
+			fmt.Sprintf("%s.%s", "{bucket:.+}", s3a.option.DomainName)).Subrouter())
 	}
 	routers = append(routers, apiRouter.PathPrefix("/{bucket}").Subrouter())