File size: 4,010 Bytes
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package utils
import (
"fmt"
"io"
"mime"
"os"
"path"
"path/filepath"
"strings"
"github.com/alist-org/alist/v3/internal/errs"
"github.com/alist-org/alist/v3/internal/conf"
log "github.com/sirupsen/logrus"
)
// CopyFile File copies a single file from src to dst
func CopyFile(src, dst string) error {
var err error
var srcfd *os.File
var dstfd *os.File
var srcinfo os.FileInfo
if srcfd, err = os.Open(src); err != nil {
return err
}
defer srcfd.Close()
if dstfd, err = CreateNestedFile(dst); err != nil {
return err
}
defer dstfd.Close()
if _, err = CopyWithBuffer(dstfd, srcfd); err != nil {
return err
}
if srcinfo, err = os.Stat(src); err != nil {
return err
}
return os.Chmod(dst, srcinfo.Mode())
}
// CopyDir Dir copies a whole directory recursively
func CopyDir(src, dst string) error {
var err error
var fds []os.DirEntry
var srcinfo os.FileInfo
if srcinfo, err = os.Stat(src); err != nil {
return err
}
if err = os.MkdirAll(dst, srcinfo.Mode()); err != nil {
return err
}
if fds, err = os.ReadDir(src); err != nil {
return err
}
for _, fd := range fds {
srcfp := path.Join(src, fd.Name())
dstfp := path.Join(dst, fd.Name())
if fd.IsDir() {
if err = CopyDir(srcfp, dstfp); err != nil {
fmt.Println(err)
}
} else {
if err = CopyFile(srcfp, dstfp); err != nil {
fmt.Println(err)
}
}
}
return nil
}
// SymlinkOrCopyFile symlinks a file or copy if symlink failed
func SymlinkOrCopyFile(src, dst string) error {
if err := CreateNestedDirectory(filepath.Dir(dst)); err != nil {
return err
}
if err := os.Symlink(src, dst); err != nil {
return CopyFile(src, dst)
}
return nil
}
// Exists determine whether the file exists
func Exists(name string) bool {
if _, err := os.Stat(name); err != nil {
if os.IsNotExist(err) {
return false
}
}
return true
}
// CreateNestedDirectory create nested directory
func CreateNestedDirectory(path string) error {
err := os.MkdirAll(path, 0700)
if err != nil {
log.Errorf("can't create folder, %s", err)
}
return err
}
// CreateNestedFile create nested file
func CreateNestedFile(path string) (*os.File, error) {
basePath := filepath.Dir(path)
if err := CreateNestedDirectory(basePath); err != nil {
return nil, err
}
return os.Create(path)
}
// CreateTempFile create temp file from io.ReadCloser, and seek to 0
func CreateTempFile(r io.Reader, size int64) (*os.File, error) {
if f, ok := r.(*os.File); ok {
return f, nil
}
f, err := os.CreateTemp(conf.Conf.TempDir, "file-*")
if err != nil {
return nil, err
}
readBytes, err := CopyWithBuffer(f, r)
if err != nil {
_ = os.Remove(f.Name())
return nil, errs.NewErr(err, "CreateTempFile failed")
}
if size > 0 && readBytes != size {
_ = os.Remove(f.Name())
return nil, errs.NewErr(err, "CreateTempFile failed, incoming stream actual size= %d, expect = %d ", readBytes, size)
}
_, err = f.Seek(0, io.SeekStart)
if err != nil {
_ = os.Remove(f.Name())
return nil, errs.NewErr(err, "CreateTempFile failed, can't seek to 0 ")
}
return f, nil
}
// GetFileType get file type
func GetFileType(filename string) int {
ext := strings.ToLower(Ext(filename))
if SliceContains(conf.SlicesMap[conf.AudioTypes], ext) {
return conf.AUDIO
}
if SliceContains(conf.SlicesMap[conf.VideoTypes], ext) {
return conf.VIDEO
}
if SliceContains(conf.SlicesMap[conf.ImageTypes], ext) {
return conf.IMAGE
}
if SliceContains(conf.SlicesMap[conf.TextTypes], ext) {
return conf.TEXT
}
return conf.UNKNOWN
}
func GetObjType(filename string, isDir bool) int {
if isDir {
return conf.FOLDER
}
return GetFileType(filename)
}
var extraMimeTypes = map[string]string{
".apk": "application/vnd.android.package-archive",
}
func GetMimeType(name string) string {
ext := path.Ext(name)
if m, ok := extraMimeTypes[ext]; ok {
return m
}
m := mime.TypeByExtension(ext)
if m != "" {
return m
}
return "application/octet-stream"
}
const (
KB = 1 << (10 * (iota + 1))
MB
GB
TB
)
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