weed shell: simplify CLI option for filer

weed/util/parse.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+	"fmt"
 	"net/url"
 	"strconv"
 	"strings"
@@ -45,3 +46,18 @@ func ParseFilerUrl(entryPath string) (filerServer string, filerPort int64, path
 	path = u.Path
 	return
 }
+
+func ParseHostPort(hostPort string) (filerServer string, filerPort int64, err error) {
+	parts := strings.Split(hostPort, ":")
+	if len(parts) != 2 {
+		err = fmt.Errorf("failed to parse %s\n", hostPort)
+		return
+	}
+
+	filerPort, err = strconv.ParseInt(parts[1], 10, 64)
+	if err == nil {
+		filerServer = parts[0]
+	}
+
+	return
+}