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package filecache
import (
"io"
"os"
"github.com/anacrolix/missinggo/resource"
)
type uniformResourceProvider struct {
*Cache
}
var _ resource.Provider = &uniformResourceProvider{}
func (me *uniformResourceProvider) NewInstance(loc string) (resource.Instance, error) {
return &uniformResource{me.Cache, loc}, nil
}
type uniformResource struct {
Cache *Cache
Location string
}
func (me *uniformResource) Get() (io.ReadCloser, error) {
return me.Cache.OpenFile(me.Location, os.O_RDONLY)
}
func (me *uniformResource) Put(r io.Reader) (err error) {
f, err := me.Cache.OpenFile(me.Location, os.O_WRONLY|os.O_CREATE|os.O_TRUNC)
if err != nil {
return
}
defer f.Close()
_, err = io.Copy(f, r)
return
}
func (me *uniformResource) ReadAt(b []byte, off int64) (n int, err error) {
f, err := me.Cache.OpenFile(me.Location, os.O_RDONLY)
if err != nil {
return
}
defer f.Close()
return f.ReadAt(b, off)
}
func (me *uniformResource) WriteAt(b []byte, off int64) (n int, err error) {
f, err := me.Cache.OpenFile(me.Location, os.O_CREATE|os.O_WRONLY)
if err != nil {
return
}
defer f.Close()
return f.WriteAt(b, off)
}
func (me *uniformResource) Stat() (fi os.FileInfo, err error) {
return me.Cache.Stat(me.Location)
}
func (me *uniformResource) Delete() error {
return me.Cache.Remove(me.Location)
}
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