mirror of
https://gitee.com/johng/gf.git
synced 2024-12-02 12:17:53 +08:00
72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the MIT License.
|
|
// If a copy of the MIT was not distributed with this file,
|
|
// You can obtain one at https://github.com/gogf/gf.
|
|
|
|
package gres
|
|
|
|
import (
|
|
"bytes"
|
|
"os"
|
|
|
|
"github.com/gogf/gf/v2/errors/gerror"
|
|
)
|
|
|
|
// Close implements interface of http.File.
|
|
func (f *File) Close() error {
|
|
return nil
|
|
}
|
|
|
|
// Readdir implements Readdir interface of http.File.
|
|
func (f *File) Readdir(count int) ([]os.FileInfo, error) {
|
|
files := f.resource.ScanDir(f.Name(), "*", false)
|
|
if len(files) > 0 {
|
|
if count <= 0 || count > len(files) {
|
|
count = len(files)
|
|
}
|
|
infos := make([]os.FileInfo, count)
|
|
for k, v := range files {
|
|
infos[k] = v.FileInfo()
|
|
}
|
|
return infos, nil
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
// Stat implements Stat interface of http.File.
|
|
func (f *File) Stat() (os.FileInfo, error) {
|
|
return f.FileInfo(), nil
|
|
}
|
|
|
|
// Read implements the io.Reader interface.
|
|
func (f *File) Read(b []byte) (n int, err error) {
|
|
reader, err := f.getReader()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if n, err = reader.Read(b); err != nil {
|
|
err = gerror.Wrapf(err, `read content failed`)
|
|
}
|
|
return
|
|
}
|
|
|
|
// Seek implements the io.Seeker interface.
|
|
func (f *File) Seek(offset int64, whence int) (n int64, err error) {
|
|
reader, err := f.getReader()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if n, err = reader.Seek(offset, whence); err != nil {
|
|
err = gerror.Wrapf(err, `seek failed for offset %d, whence %d`, offset, whence)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (f *File) getReader() (*bytes.Reader, error) {
|
|
if f.reader == nil {
|
|
f.reader = bytes.NewReader(f.Content())
|
|
}
|
|
return f.reader, nil
|
|
}
|