forked from GoAdminGroup/go-admin
/
file.go
81 lines (65 loc) · 1.38 KB
/
file.go
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package file
import (
"github.com/chenhg5/go-admin/plugins/admin/modules"
"io"
"mime/multipart"
"os"
"path"
"sync"
)
type Uploader interface {
Upload(*multipart.Form) (*multipart.Form, error)
}
func GetFileEngine(name string) Uploader {
if name == "local" {
return GetLocalFileUploader()
}
return nil
}
type UploadFun func(*multipart.FileHeader, string) (string, error)
func Upload(c UploadFun, form *multipart.Form) (*multipart.Form, error) {
var (
suffix string
filename string
)
for k, _ := range (*form).File {
fileObj := form.File[k][0]
suffix = path.Ext(fileObj.Filename)
filename = modules.Uuid(50) + suffix
pathStr, err := c(fileObj, filename)
if err != nil {
return nil, err
}
(*form).Value[k] = []string{pathStr}
}
return form, nil
}
func SaveMultipartFile(fh *multipart.FileHeader, path string) error {
f, err := fh.Open()
if err != nil {
return err
}
defer f.Close()
if ff, ok := f.(*os.File); ok {
return os.Rename(ff.Name(), path)
}
ff, err := os.Create(path)
if err != nil {
return err
}
defer ff.Close()
_, err = copyZeroAlloc(ff, f)
return err
}
func copyZeroAlloc(w io.Writer, r io.Reader) (int64, error) {
vbuf := copyBufPool.Get()
buf := vbuf.([]byte)
n, err := io.CopyBuffer(w, r, buf)
copyBufPool.Put(vbuf)
return n, err
}
var copyBufPool = sync.Pool{
New: func() interface{} {
return make([]byte, 4096)
},
}