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ReadCloser: Call close if reader implements it

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This commit is contained in:
Alexander Neumann 2016-01-02 14:10:38 +01:00
parent e0361b1f9f
commit 5071f28d55
1 changed files with 6 additions and 2 deletions
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8
backend/mem_backend.go
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@ -125,17 +125,21 @@ func memCreate(be *MemoryBackend) (Blob, error) {
return blob, nil return blob, nil
} }
// ReadCloser wraps a reader and adds a noop Close method. // ReadCloser wraps a reader and adds a noop Close method if rd does not implement io.Closer.
func ReadCloser(rd io.Reader) io.ReadCloser { func ReadCloser(rd io.Reader) io.ReadCloser {
return readCloser{rd} return readCloser{rd}
} }
// readCloser wraps a reader and adds a noop Close method. // readCloser wraps a reader and adds a noop Close method if rd does not implement io.Closer.
type readCloser struct { type readCloser struct {
io.Reader io.Reader
} }
func (rd readCloser) Close() error { func (rd readCloser) Close() error {
if r, ok := rd.Reader.(io.Closer); ok {
return r.Close()
}
return nil return nil
} }