wide/util/file.go

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2014-11-16 11:25:27 +03:00
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()
}
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// 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()
}