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os/gres/gres_http_file.go
71 строка
2 KB
John Guo
change errors wrapped by gerror.Wrap with error stack info for all packages
22 дек 2021, 19:09
22 дек 2021, 19:09
48c5c1e
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// 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 }