forked from TrueCloudLab/restic
51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
package backend
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import (
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"context"
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"io"
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"io/ioutil"
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"github.com/restic/restic/internal/restic"
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)
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// LoadAll reads all data stored in the backend for the handle.
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func LoadAll(ctx context.Context, be restic.Backend, h restic.Handle) (buf []byte, err error) {
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err = be.Load(ctx, h, 0, 0, func(rd io.Reader) (ierr error) {
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buf, ierr = ioutil.ReadAll(rd)
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return ierr
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})
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return buf, err
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}
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// LimitedReadCloser wraps io.LimitedReader and exposes the Close() method.
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type LimitedReadCloser struct {
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io.ReadCloser
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io.Reader
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}
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// Read reads data from the limited reader.
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func (l *LimitedReadCloser) Read(p []byte) (int, error) {
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return l.Reader.Read(p)
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}
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// LimitReadCloser returns a new reader wraps r in an io.LimitReader, but also
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// exposes the Close() method.
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func LimitReadCloser(r io.ReadCloser, n int64) *LimitedReadCloser {
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return &LimitedReadCloser{ReadCloser: r, Reader: io.LimitReader(r, n)}
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}
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// DefaultLoad implements Backend.Load using lower-level openReader func
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func DefaultLoad(ctx context.Context, h restic.Handle, length int, offset int64,
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openReader func(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error),
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fn func(rd io.Reader) error) error {
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rd, err := openReader(ctx, h, length, offset)
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if err != nil {
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return err
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}
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err = fn(rd)
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if err != nil {
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rd.Close() // ignore secondary errors closing the reader
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return err
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}
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return rd.Close()
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}
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