mirror of
https://github.com/kopia/kopia.git
synced 2025-12-23 22:57:50 -05:00
f8be8f6a56
- repolog package - blobcrypto package - indexblob package Minor cleanups: - removed dead code - introduced New*() methods for object construction
101 lines
2.2 KiB
Go
101 lines
2.2 KiB
Go
package cli
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import (
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"bytes"
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"context"
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"encoding/json"
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"io"
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"github.com/pkg/errors"
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"github.com/kopia/kopia/internal/blobcrypto"
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"github.com/kopia/kopia/internal/gather"
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"github.com/kopia/kopia/internal/iocopy"
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"github.com/kopia/kopia/repo"
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"github.com/kopia/kopia/repo/blob"
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)
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type commandBlobShow struct {
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blobShowDecrypt bool
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blobShowIDs []string
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out textOutput
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}
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func (c *commandBlobShow) setup(svc appServices, parent commandParent) {
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cmd := parent.Command("show", "Show contents of BLOBs").Alias("cat")
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cmd.Flag("decrypt", "Decrypt blob if possible").BoolVar(&c.blobShowDecrypt)
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cmd.Arg("blobID", "Blob IDs").Required().StringsVar(&c.blobShowIDs)
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cmd.Action(svc.directRepositoryReadAction(c.run))
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c.out.setup(svc)
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}
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func (c *commandBlobShow) run(ctx context.Context, rep repo.DirectRepository) error {
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for _, blobID := range c.blobShowIDs {
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if err := c.maybeDecryptBlob(ctx, c.out.stdout(), rep, blob.ID(blobID)); err != nil {
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return errors.Wrap(err, "error presenting blob")
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}
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}
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return nil
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}
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func (c *commandBlobShow) maybeDecryptBlob(ctx context.Context, w io.Writer, rep repo.DirectRepository, blobID blob.ID) error {
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var (
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d gather.WriteBuffer
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b gather.Bytes
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)
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if err := rep.BlobReader().GetBlob(ctx, blobID, 0, -1, &d); err != nil {
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return errors.Wrap(err, "error reading blob")
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}
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b = d.Bytes()
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if c.blobShowDecrypt && canDecryptBlob(blobID) {
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var tmp gather.WriteBuffer
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defer tmp.Close()
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if err := blobcrypto.Decrypt(rep.ContentReader().ContentFormat(), b, blobID, &tmp); err != nil {
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return errors.Wrap(err, "error decrypting blob")
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}
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b = tmp.Bytes()
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}
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if isJSONBlob(blobID) {
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var buf bytes.Buffer
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if err := json.Indent(&buf, b.ToByteSlice(), "", " "); err != nil {
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return errors.Wrap(err, "invalid JSON")
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}
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b = gather.FromSlice(buf.Bytes())
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}
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if err := iocopy.JustCopy(w, b.Reader()); err != nil {
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return errors.Wrap(err, "error copying data")
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}
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return nil
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}
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func canDecryptBlob(b blob.ID) bool {
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switch b[0] {
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case '_', 'n', 'm', 'l':
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return true
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default:
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return false
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}
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}
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func isJSONBlob(b blob.ID) bool {
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switch b[0] {
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case 'm', 'l':
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return true
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default:
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return false
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}
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}
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