CasaOS/pkg/utils/file/file.go

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
}

// RMDir remove a directory
func RMDir(src string) error {
	err := os.RemoveAll(src)
	if err != nil {
		return err
	}
	os.Remove(src)
	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 := 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
}

// 判断所给路径文件/文件夹是否存在
func Exists(path string) bool {
	_, err := os.Stat(path) //os.Stat获取文件信息
	if err != nil {
		if os.IsExist(err) {
			return true
		}
		return false
	}
	return true
}

// 判断所给路径是否为文件夹
func IsDir(path string) bool {
	s, err := os.Stat(path)
	if err != nil {
		return false
	}
	return s.IsDir()
}

// 判断所给路径是否为文件
func IsFile(path string) bool {
	return !IsDir(path)
}

func CreateFile(path string) error {
	file, err := os.Create(path)
	if err != nil {
		return err
	}
	defer file.Close()
	return nil
}

// IsNotExistMkDir create a directory if it does not exist
func IsNotExistCreateFile(src string) error {
	if notExist := CheckNotExist(src); notExist == true {
		if err := CreateFile(src); err != nil {
			return err
		}
	}

	return nil
}