62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
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package resource
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import (
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"io"
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"os"
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)
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// Provides access to resources through the native OS filesystem.
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type OSFileProvider struct{}
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var _ Provider = OSFileProvider{}
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func (me OSFileProvider) NewInstance(filePath string) (r Instance, err error) {
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return &osFileInstance{filePath}, nil
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}
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type osFileInstance struct {
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path string
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}
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var _ Instance = &osFileInstance{}
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func (me *osFileInstance) Get() (ret io.ReadCloser, err error) {
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return os.Open(me.path)
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}
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func (me *osFileInstance) Put(r io.Reader) (err error) {
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f, err := os.OpenFile(me.path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0640)
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if err != nil {
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return
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}
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defer f.Close()
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_, err = io.Copy(f, r)
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return
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}
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func (me *osFileInstance) ReadAt(b []byte, off int64) (n int, err error) {
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f, err := os.Open(me.path)
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if err != nil {
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return
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}
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defer f.Close()
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return f.ReadAt(b, off)
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}
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func (me *osFileInstance) WriteAt(b []byte, off int64) (n int, err error) {
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f, err := os.OpenFile(me.path, os.O_CREATE|os.O_WRONLY, 0640)
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if err != nil {
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return
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}
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defer f.Close()
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return f.WriteAt(b, off)
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}
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func (me *osFileInstance) Stat() (fi os.FileInfo, err error) {
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return os.Stat(me.path)
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}
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func (me *osFileInstance) Delete() error {
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return os.Remove(me.path)
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}
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