XL: ListObjects should not list when delimiter and prefix are '/'. (#1777)

fs-v1.go

@@ -338,6 +338,15 @@ func (fs fsObjects) listObjectsFS(bucket, prefix, marker, delimiter string, maxK
 		return ListObjectsInfo{}, nil
 	}
 
+	// For delimiter and prefix as '/' we do not list anything at all
+	// since according to s3 spec we stop at the 'delimiter'
+	// along // with the prefix. On a flat namespace with 'prefix'
+	// as '/' we don't have any entries, since all the keys are
+	// of form 'keyName/...'
+	if delimiter == slashSeparator && prefix == slashSeparator {
+		return ListObjectsInfo{}, nil
+	}
+
 	// Over flowing count - reset to maxObjectList.
 	if maxKeys < 0 || maxKeys > maxObjectList {
 		maxKeys = maxObjectList

object-api-listobjects_test.go

@@ -413,6 +413,12 @@ func testListObjects(obj ObjectLayer, instanceType string, t *testing.T) {
 				{Name: "obj2"},
 			},
 		},
+		// ListObjectsResult-30.
+		// Prefix and Delimiter is set to '/', (testCase 62).
+		{
+			IsTruncated: false,
+			Objects:     []ObjectInfo{},
+		},
 	}
 
 	testCases := []struct {
@@ -521,6 +527,8 @@ func testListObjects(obj ObjectLayer, instanceType string, t *testing.T) {
 		// Test with marker set as hierarhical value and with delimiter. (60-61)
 		{"test-bucket-list-object", "", "Asia/India/India-summer-photos-1", "/", 10, resultCases[28], nil, true},
 		{"test-bucket-list-object", "", "Asia/India/Karnataka/Bangalore/Koramangala/pics", "/", 10, resultCases[29], nil, true},
+		// Test with prefix and delimiter set to '/'. (62)
+		{"test-bucket-list-object", "/", "", "/", 10, resultCases[30], nil, true},
 	}
 
 	for i, testCase := range testCases {

xl-v1-list-objects.go

@@ -114,6 +114,14 @@ func (xl xlObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKey
 		return ListObjectsInfo{}, nil
 	}
 
+	// For delimiter and prefix as '/' we do not list anything at all
+	// since according to s3 spec we stop at the 'delimiter' along
+	// with the prefix. On a flat namespace with 'prefix' as '/'
+	// we don't have any entries, since all the keys are of form 'keyName/...'
+	if delimiter == slashSeparator && prefix == slashSeparator {
+		return ListObjectsInfo{}, nil
+	}
+
 	// Over flowing count - reset to maxObjectList.
 	if maxKeys < 0 || maxKeys > maxObjectList {
 		maxKeys = maxObjectList