cli and ls s3

minio.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"io/ioutil"
 	"net/url"
+	"sort"
 	"strings"
 
 	minio "github.com/minio/minio-go"
@@ -29,7 +30,8 @@ func (m *Minio) List(ns []string, limits ...string) ([]string, error) {
 	done := make(chan struct{})
 	defer close(done)
 	keys := []string{}
-	for resp := range m.db.ListObjects(namespace, "", true, done) {
+	prefix := commonSubstr(limits[:2])
+	for resp := range m.db.ListObjects(namespace, prefix, true, done) {
 		if resp.Err != nil {
 			return keys, resp.Err
 		}
@@ -81,3 +83,26 @@ func (m *Minio) Close() error {
 func isNotExistErr(err error) bool {
 	return err != nil && strings.Contains(err.Error(), "does not exist")
 }
+
+func commonSubstr(items []string) string {
+	if len(items) == 0 {
+		return ""
+	} else if len(items) == 1 {
+		return items[0]
+	}
+	sort.Strings(items)
+	min := items[0]
+	max := items[len(items)-1]
+	if len(min) == 0 || len(max) == 0 {
+		return ""
+	}
+	if min[0] != max[0] {
+		return ""
+	}
+	for i := 1; i < len(min) && i < len(max); i++ {
+		if min[i] != max[i] {
+			return min[:i-1]
+		}
+	}
+	return min
+}