[#507] Return not implemented by default in bucket router

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

api/middleware/policy.go

@@ -24,11 +24,15 @@ import (
 )
 
 const (
-	QueryVersionID = "versionId"
-	QueryPrefix    = "prefix"
-	QueryDelimiter = "delimiter"
-	QueryMaxKeys   = "max-keys"
-	amzTagging     = "x-amz-tagging"
+	QueryVersionID    = "versionId"
+	QueryPrefix       = "prefix"
+	QueryDelimiter    = "delimiter"
+	QueryMaxKeys      = "max-keys"
+	QueryMarker       = "marker"
+	QueryEncodingType = "encoding-type"
+	amzTagging        = "x-amz-tagging"
+
+	unmatchedBucketOperation = "UnmatchedBucketOperation"
 )
 
 // In these operations we don't check resource tags because
@@ -268,8 +272,17 @@ func determineBucketOperation(r *http.Request) string {
 			return ListObjectsV2MOperation
 		case query.Get(ListTypeQuery) == "2":
 			return ListObjectsV2Operation
-		default:
+		case len(query) == 0 || func() bool {
+			for key := range query {
+				if key != QueryDelimiter && key != QueryMaxKeys && key != QueryPrefix && key != QueryMarker && key != QueryEncodingType {
+					return false
+				}
+			}
+			return true
+		}():
 			return ListObjectsV1Operation
+		default:
+			return unmatchedBucketOperation
 		}
 	case http.MethodPut:
 		switch {
@@ -291,8 +304,10 @@ func determineBucketOperation(r *http.Request) string {
 			return PutBucketVersioningOperation
 		case query.Has(NotificationQuery):
 			return PutBucketNotificationOperation
-		default:
+		case len(query) == 0:
 			return CreateBucketOperation
+		default:
+			return unmatchedBucketOperation
 		}
 	case http.MethodPost:
 		switch {
@@ -315,12 +330,14 @@ func determineBucketOperation(r *http.Request) string {
 			return DeleteBucketLifecycleOperation
 		case query.Has(EncryptionQuery):
 			return DeleteBucketEncryptionOperation
-		default:
+		case len(query) == 0:
 			return DeleteBucketOperation
+		default:
+			return unmatchedBucketOperation
 		}
 	}
 
-	return "UnmatchedBucketOperation"
+	return unmatchedBucketOperation
 }
 
 func determineObjectOperation(r *http.Request) string {