forked from mirrors/gotosocial
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package util
|
|
|
|
import "io"
|
|
|
|
// NopReadCloser turns a supplied io.Reader into io.ReadCloser with a nop Close() implementation
|
|
func NopReadCloser(r io.Reader) io.ReadCloser {
|
|
return &nopReadCloser{r}
|
|
}
|
|
|
|
// NopWriteCloser turns a supplied io.Writer into io.WriteCloser with a nop Close() implementation
|
|
func NopWriteCloser(w io.Writer) io.WriteCloser {
|
|
return &nopWriteCloser{w}
|
|
}
|
|
|
|
// ReadCloserWithCallback adds a customizable callback to be called upon Close() of a supplied io.ReadCloser
|
|
func ReadCloserWithCallback(rc io.ReadCloser, cb func()) io.ReadCloser {
|
|
return &callbackReadCloser{
|
|
ReadCloser: rc,
|
|
callback: cb,
|
|
}
|
|
}
|
|
|
|
// nopReadCloser turns an io.Reader -> io.ReadCloser with a nop Close()
|
|
type nopReadCloser struct{ io.Reader }
|
|
|
|
func (r *nopReadCloser) Close() error { return nil }
|
|
|
|
// nopWriteCloser turns an io.Writer -> io.WriteCloser with a nop Close()
|
|
type nopWriteCloser struct{ io.Writer }
|
|
|
|
func (w nopWriteCloser) Close() error { return nil }
|
|
|
|
// callbackReadCloser allows adding our own custom callback to an io.ReadCloser
|
|
type callbackReadCloser struct {
|
|
io.ReadCloser
|
|
callback func()
|
|
}
|
|
|
|
func (c *callbackReadCloser) Close() error {
|
|
defer c.callback()
|
|
return c.ReadCloser.Close()
|
|
}
|