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Reworked Backend.Load API to retry errors during ongoing download

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Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
This commit is contained in:
Igor Fedorenko 2018-01-16 23:59:16 -05:00
parent b723094739
commit d58ae43317
26 changed files with 388 additions and 257 deletions
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6
internal/backend/backend_error.go
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@ -66,12 +66,12 @@ func (be *ErrorBackend) Save(ctx context.Context, h restic.Handle, rd io.Reader)
// given offset. If length is larger than zero, only a portion of the file
// is returned. rd must be closed after use. If an error is returned, the
// ReadCloser must be nil.
func (be *ErrorBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
func (be *ErrorBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, consumer func(rd io.Reader) error) error {
if be.fail(be.FailLoad) {
return nil, errors.Errorf("Load(%v, %v, %v) random error induced", h, length, offset)
return errors.Errorf("Load(%v, %v, %v) random error induced", h, length, offset)
}
return be.Backend.Load(ctx, h, length, offset)
return be.Backend.Load(ctx, h, length, offset, consumer)
}
// Stat returns information about the File identified by h.