Method Purge

internal/caches/storage_file.go:875–938

Purge 清理过期的缓存

(keys []string, urlType string)

// Purge 清理过期的缓存
func (this *FileStorage) Purge(keys []string, urlType string) error {
	// 是否正在退出
	if teaconst.IsQuiting {
		return nil
	}

	// 先尝试内存缓存
	this.runMemoryStorageSafety(func(memoryStorage *MemoryStorage) {
		_ = memoryStorage.Purge(keys, urlType)
	})

	// 目录
	if urlType == "dir" {
		for _, key := range keys {
			// 检查是否有通配符 http(s)://*.example.com
			var schemeIndex = strings.Index(key, "://")
			if schemeIndex > 0 {
				var keyRight = key[schemeIndex+3:]
				if strings.HasPrefix(keyRight, "*.") {
					err := this.list.CleanMatchPrefix(key)
					if err != nil {
						return err
					}
					continue
				}
			}

			err := this.list.CleanPrefix(key)
			if err != nil {
				return err
			}
		}
		return nil
	}

	// URL
	for _, key := range keys {
		// 检查是否有通配符 http(s)://*.example.com
		var schemeIndex = strings.Index(key, "://")
		if schemeIndex > 0 {
			var keyRight = key[schemeIndex+3:]
			if strings.HasPrefix(keyRight, "*.") {
				err := this.list.CleanMatchKey(key)
				if err != nil {
					return err
				}
				continue
			}
		}

		// 普通的Key
		hash, path, _ := this.keyPath(key)
		err := this.removeCacheFile(path)
		if err != nil && !os.IsNotExist(err) {
			return err
		}

		err = this.list.Remove(hash)