package util import ( "os" "strings" "github.com/golang/glog" ) type myfile struct{} // File utilities. var File = myfile{} // GetFileSize get the length in bytes of file of the specified path. func (*myfile) GetFileSize(path string) int64 { f, err := os.Open(path) if nil != err { return -1 } fi, err := f.Stat() if nil != err { return -1 } return fi.Size() } // IsExist determines whether the file spcified by the given path is exists. func (*myfile) IsExist(path string) bool { _, err := os.Stat(path) return err == nil || os.IsExist(err) } // IsBinary determines whether the specified content is a binary file content. func (*myfile) IsBinary(content string) bool { for _, b := range content { if 0 == b { return true } } return false } // IsImg determines whether the specified extension is a image. func (*myfile) IsImg(extension string) bool { ext := strings.ToLower(extension) switch ext { case ".jpg", ".jpeg", ".bmp", ".gif", ".png", ".svg", ".ico": return true default: return false } } // IsDir determines whether the specified path is a directory. func (*myfile) IsDir(path string) bool { fio, err := os.Lstat(path) if nil != err { glog.Warningf("Determines whether [%s] is a directory failed: [%v]", path, err) return false } return fio.IsDir() }