/
file.go
92 lines (73 loc) · 1.79 KB
/
file.go
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package file
import (
"fmt"
"io/ioutil"
"mime/multipart"
"os"
"path"
)
// GetSize get the file size
func GetSize(f multipart.File) (int, error) {
content, err := ioutil.ReadAll(f)
return len(content), err
}
// GetExt get the file ext
func GetExt(fileName string) string {
return path.Ext(fileName)
}
// CheckNotExist check if the file exists
func CheckNotExist(src string) bool {
_, err := os.Stat(src)
return os.IsNotExist(err)
}
// CheckPermission check if the file has permission
func CheckPermission(src string) bool {
_, err := os.Stat(src)
return os.IsPermission(err)
}
// IsNotExistMkDir create a directory if it does not exist
func IsNotExistMkDir(src string) error {
if notExist := CheckNotExist(src); notExist == true {
if err := MkDir(src); err != nil {
return err
}
}
return nil
}
// MkDir create a directory
func MkDir(src string) error {
err := os.MkdirAll(src, os.ModePerm)
if err != nil {
return err
}
return nil
}
// Open a file according to a specific mode
func Open(name string, flag int, perm os.FileMode) (*os.File, error) {
f, err := os.OpenFile(name, flag, perm)
if err != nil {
return nil, err
}
return f, nil
}
// MustOpen maximize trying to open the file
func MustOpen(fileName, filePath string) (*os.File, error) {
dir, err := os.Getwd()
if err != nil {
return nil, fmt.Errorf("os.Getwd err: %v", err)
}
src := dir + "/" + filePath
perm := CheckPermission(src)
if perm == true {
return nil, fmt.Errorf("file.CheckPermission Permission denied src: %s", src)
}
err = IsNotExistMkDir(src)
if err != nil {
return nil, fmt.Errorf("file.IsNotExistMkDir src: %s, err: %v", src, err)
}
f, err := Open(src+fileName, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0644)
if err != nil {
return nil, fmt.Errorf("Fail to OpenFile :%v", err)
}
return f, nil
}