mirror of
https://github.com/octoleo/restic.git
synced 2024-11-05 21:07:52 +00:00
99f7fd74e3
As mentioned in issue [#1560](https://github.com/restic/restic/pull/1560#issuecomment-364689346) this changes the signature for `backend.Save()`. It now takes a parameter of interface type `RewindReader`, so that the backend implementations or our `RetryBackend` middleware can reset the reader to the beginning and then retry an upload operation. The `RewindReader` interface also provides a `Length()` method, which is used in the backend to get the size of the data to be saved. This removes several ugly hacks we had to do to pull the size back out of the `io.Reader` passed to `Save()` before. In the `s3` and `rest` backend this is actively used.
146 lines
3.4 KiB
Go
146 lines
3.4 KiB
Go
package pack_test
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto/rand"
|
|
"crypto/sha256"
|
|
"encoding/binary"
|
|
"encoding/json"
|
|
"io"
|
|
"testing"
|
|
|
|
"github.com/restic/restic/internal/backend/mem"
|
|
"github.com/restic/restic/internal/crypto"
|
|
"github.com/restic/restic/internal/pack"
|
|
"github.com/restic/restic/internal/restic"
|
|
rtest "github.com/restic/restic/internal/test"
|
|
)
|
|
|
|
var testLens = []int{23, 31650, 25860, 10928, 13769, 19862, 5211, 127, 13690, 30231}
|
|
|
|
type Buf struct {
|
|
data []byte
|
|
id restic.ID
|
|
}
|
|
|
|
func newPack(t testing.TB, k *crypto.Key, lengths []int) ([]Buf, []byte, uint) {
|
|
bufs := []Buf{}
|
|
|
|
for _, l := range lengths {
|
|
b := make([]byte, l)
|
|
_, err := io.ReadFull(rand.Reader, b)
|
|
rtest.OK(t, err)
|
|
h := sha256.Sum256(b)
|
|
bufs = append(bufs, Buf{data: b, id: h})
|
|
}
|
|
|
|
// pack blobs
|
|
p := pack.NewPacker(k, nil)
|
|
for _, b := range bufs {
|
|
p.Add(restic.TreeBlob, b.id, b.data)
|
|
}
|
|
|
|
_, err := p.Finalize()
|
|
rtest.OK(t, err)
|
|
|
|
packData := p.Writer().(*bytes.Buffer).Bytes()
|
|
return bufs, packData, p.Size()
|
|
}
|
|
|
|
func verifyBlobs(t testing.TB, bufs []Buf, k *crypto.Key, rd io.ReaderAt, packSize uint) {
|
|
written := 0
|
|
for _, buf := range bufs {
|
|
written += len(buf.data)
|
|
}
|
|
// header length
|
|
written += binary.Size(uint32(0))
|
|
// header + header crypto
|
|
headerSize := len(bufs) * (binary.Size(restic.BlobType(0)) + binary.Size(uint32(0)) + len(restic.ID{}))
|
|
written += restic.CiphertextLength(headerSize)
|
|
|
|
// check length
|
|
rtest.Equals(t, uint(written), packSize)
|
|
|
|
// read and parse it again
|
|
entries, err := pack.List(k, rd, int64(packSize))
|
|
rtest.OK(t, err)
|
|
rtest.Equals(t, len(entries), len(bufs))
|
|
|
|
var buf []byte
|
|
for i, b := range bufs {
|
|
e := entries[i]
|
|
rtest.Equals(t, b.id, e.ID)
|
|
|
|
if len(buf) < int(e.Length) {
|
|
buf = make([]byte, int(e.Length))
|
|
}
|
|
buf = buf[:int(e.Length)]
|
|
n, err := rd.ReadAt(buf, int64(e.Offset))
|
|
rtest.OK(t, err)
|
|
buf = buf[:n]
|
|
|
|
rtest.Assert(t, bytes.Equal(b.data, buf),
|
|
"data for blob %v doesn't match", i)
|
|
}
|
|
}
|
|
|
|
func TestCreatePack(t *testing.T) {
|
|
// create random keys
|
|
k := crypto.NewRandomKey()
|
|
|
|
bufs, packData, packSize := newPack(t, k, testLens)
|
|
rtest.Equals(t, uint(len(packData)), packSize)
|
|
verifyBlobs(t, bufs, k, bytes.NewReader(packData), packSize)
|
|
}
|
|
|
|
var blobTypeJSON = []struct {
|
|
t restic.BlobType
|
|
res string
|
|
}{
|
|
{restic.DataBlob, `"data"`},
|
|
{restic.TreeBlob, `"tree"`},
|
|
}
|
|
|
|
func TestBlobTypeJSON(t *testing.T) {
|
|
for _, test := range blobTypeJSON {
|
|
// test serialize
|
|
buf, err := json.Marshal(test.t)
|
|
rtest.OK(t, err)
|
|
rtest.Equals(t, test.res, string(buf))
|
|
|
|
// test unserialize
|
|
var v restic.BlobType
|
|
err = json.Unmarshal([]byte(test.res), &v)
|
|
rtest.OK(t, err)
|
|
rtest.Equals(t, test.t, v)
|
|
}
|
|
}
|
|
|
|
func TestUnpackReadSeeker(t *testing.T) {
|
|
// create random keys
|
|
k := crypto.NewRandomKey()
|
|
|
|
bufs, packData, packSize := newPack(t, k, testLens)
|
|
|
|
b := mem.New()
|
|
id := restic.Hash(packData)
|
|
|
|
handle := restic.Handle{Type: restic.DataFile, Name: id.String()}
|
|
rtest.OK(t, b.Save(context.TODO(), handle, restic.NewByteReader(packData)))
|
|
verifyBlobs(t, bufs, k, restic.ReaderAt(b, handle), packSize)
|
|
}
|
|
|
|
func TestShortPack(t *testing.T) {
|
|
k := crypto.NewRandomKey()
|
|
|
|
bufs, packData, packSize := newPack(t, k, []int{23})
|
|
|
|
b := mem.New()
|
|
id := restic.Hash(packData)
|
|
|
|
handle := restic.Handle{Type: restic.DataFile, Name: id.String()}
|
|
rtest.OK(t, b.Save(context.TODO(), handle, restic.NewByteReader(packData)))
|
|
verifyBlobs(t, bufs, k, restic.ReaderAt(b, handle), packSize)
|
|
}
|