| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Package storageutil provides helpers for storage implementations. |
| package storageutil |
| |
| import ( |
| "context" |
| "errors" |
| "fmt" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-kubernetes/pkg/bufman/pkg/normalpath" |
| ) |
| |
| // ObjectInfo is an embeddable ObjectInfo. |
| // |
| // This is intentially static and should not be modifiable. |
| // If constructing an object, do not use an ObjectInfo to build it. |
| type ObjectInfo struct { |
| path string |
| externalPath string |
| } |
| |
| // NewObjectInfo returns a new ObjectInfo. |
| func NewObjectInfo( |
| path string, |
| externalPath string, |
| ) ObjectInfo { |
| return ObjectInfo{ |
| path: path, |
| externalPath: externalPath, |
| } |
| } |
| |
| // Path implements ObjectInfo. |
| func (o ObjectInfo) Path() string { |
| return o.path |
| } |
| |
| // ExternalPath implements ObjectInfo. |
| func (o ObjectInfo) ExternalPath() string { |
| return o.externalPath |
| } |
| |
| // ValidatePath validates a path. |
| func ValidatePath(path string) (string, error) { |
| path, err := normalpath.NormalizeAndValidate(path) |
| if err != nil { |
| return "", err |
| } |
| if path == "." { |
| return "", errors.New("cannot use root") |
| } |
| return path, nil |
| } |
| |
| // ValidatePrefix validates a prefix. |
| func ValidatePrefix(prefix string) (string, error) { |
| return normalpath.NormalizeAndValidate(prefix) |
| } |
| |
| // WalkChecker does validation for every step of a walk. |
| type WalkChecker interface { |
| Check(ctx context.Context) error |
| } |
| |
| // NewWalkChecker returns a new WalkChecker. |
| func NewWalkChecker() WalkChecker { |
| return &walkChecker{} |
| } |
| |
| type walkChecker struct { |
| count int |
| } |
| |
| func (w *walkChecker) Check(ctx context.Context) error { |
| w.count++ |
| select { |
| case <-ctx.Done(): |
| err := ctx.Err() |
| if err == context.DeadlineExceeded { |
| return fmt.Errorf("timed out after %d files: %v", w.count, err) |
| } |
| return err |
| default: |
| return nil |
| } |
| } |