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backends: Add Save()

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This commit is contained in:
Alexander Neumann 2016-01-24 16:59:38 +01:00
parent ed172c06e0
commit 54f8860612
10 changed files with 233 additions and 11 deletions
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2
backend/handle.go
View file

@ -33,7 +33,7 @@ func (h Handle) Valid() error {
case Index:
case Config:
default:
return fmt.Errorf("invalid config %q", h.Type)
return fmt.Errorf("invalid Type %q", h.Type)
}
if h.Type == Config {

14
backend/local/backend_test.go
View file

@ -58,6 +58,20 @@ func TestLocalBackendWrite(t *testing.T) {
test.TestWrite(t)
}
func TestLocalBackendSave(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSave(t)
}
func TestLocalBackendSaveFilenames(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSaveFilenames(t)
}
func TestLocalBackendBackend(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)

58
backend/local/local.go
View file

@ -11,6 +11,7 @@ import (
"sync"
"github.com/restic/restic/backend"
"github.com/restic/restic/debug"
)
var ErrWrongData = errors.New("wrong data returned by backend, checksum does not match")
@ -231,12 +232,14 @@ func (b *Local) Save(h backend.Handle, p []byte) (err error) {
return err
}
f, err := os.Create(filename(b.p, h.Type, h.Name))
tmpfile, err := ioutil.TempFile(filepath.Join(b.p, backend.Paths.Temp), "temp-")
if err != nil {
return err
}
n, err := f.Write(p)
debug.Log("local.Save", "save %v (%d bytes) to %v", h, len(p), tmpfile.Name())
n, err := tmpfile.Write(p)
if err != nil {
return err
}
@ -245,11 +248,58 @@ func (b *Local) Save(h backend.Handle, p []byte) (err error) {
return errors.New("not all bytes writen")
}
if err = f.Sync(); err != nil {
if err = tmpfile.Sync(); err != nil {
return err
}
return f.Close()
err = tmpfile.Close()
if err != nil {
return err
}
f := filename(b.p, h.Type, h.Name)
// create directories if necessary, ignore errors
if h.Type == backend.Data {
os.MkdirAll(filepath.Dir(f), backend.Modes.Dir)
}
// test if new path already exists
if _, err := os.Stat(f); err == nil {
return fmt.Errorf("Rename(): file %v already exists", f)
}
err = os.Rename(tmpfile.Name(), f)
debug.Log("local.Save", "save %v: rename %v -> %v: %v",
h, filepath.Base(tmpfile.Name()), filepath.Base(f), err)
if err != nil {
return err
}
// set mode to read-only
fi, err := os.Stat(f)
if err != nil {
return err
}
err = setNewFileMode(f, fi)
if err != nil {
return err
}
// try to flush directory
d, err := os.Open(filepath.Dir(f))
if err != nil {
return err
}
err = d.Sync()
if err != nil {
return err
}
return d.Close()
}
// Stat returns information about a blob.

14
backend/mem/backend_test.go
View file

@ -58,6 +58,20 @@ func TestMemBackendWrite(t *testing.T) {
test.TestWrite(t)
}
func TestMemBackendSave(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSave(t)
}
func TestMemBackendSaveFilenames(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSaveFilenames(t)
}
func TestMemBackendBackend(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)

4
backend/mem/mem_backend.go
View file

@ -45,6 +45,10 @@ func New() *MemoryBackend {
return memLoad(be, h, p, off)
}
be.MockBackend.SaveFn = func(h backend.Handle, p []byte) error {
return memSave(be, h, p)
}
be.MockBackend.StatFn = func(h backend.Handle) (backend.BlobInfo, error) {
return memStat(be, h)
}

14
backend/s3/backend_test.go
View file

@ -58,6 +58,20 @@ func TestS3BackendWrite(t *testing.T) {
test.TestWrite(t)
}
func TestS3BackendSave(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSave(t)
}
func TestS3BackendSaveFilenames(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSaveFilenames(t)
}
func TestS3BackendBackend(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)

14
backend/sftp/backend_test.go
View file

@ -58,6 +58,20 @@ func TestSftpBackendWrite(t *testing.T) {
test.TestWrite(t)
}
func TestSftpBackendSave(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSave(t)
}
func TestSftpBackendSaveFilenames(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSaveFilenames(t)
}
func TestSftpBackendBackend(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)

23
backend/sftp/sftp.go
View file

@ -15,6 +15,7 @@ import (
"github.com/juju/errors"
"github.com/pkg/sftp"
"github.com/restic/restic/backend"
"github.com/restic/restic/debug"
)
const (
@ -379,12 +380,10 @@ func (r *SFTP) Save(h backend.Handle, p []byte) (err error) {
return err
}
f, err := r.c.Create(r.filename(h.Type, h.Name))
if err != nil {
return err
}
filename, tmpfile, err := r.tempFile()
debug.Log("sftp.Save", "save %v (%d bytes) to %v", h, len(p), filename)
n, err := f.Write(p)
n, err := tmpfile.Write(p)
if err != nil {
return err
}
@ -393,7 +392,19 @@ func (r *SFTP) Save(h backend.Handle, p []byte) (err error) {
return errors.New("not all bytes writen")
}
return f.Close()
err = tmpfile.Close()
if err != nil {
return err
}
err = r.renameFile(filename, h.Type, h.Name)
debug.Log("sftp.Save", "save %v: rename %v: %v",
h, filepath.Base(filename), err)
if err != nil {
return fmt.Errorf("sftp: renameFile: %v", err)
}
return nil
}
// Stat returns information about a blob.

14
backend/test/backend_test.go
View file

@ -58,6 +58,20 @@ func TestTestBackendWrite(t *testing.T) {
test.TestWrite(t)
}
func TestTestBackendSave(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSave(t)
}
func TestTestBackendSaveFilenames(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)
}
test.TestSaveFilenames(t)
}
func TestTestBackendBackend(t *testing.T) {
if SkipMessage != "" {
t.Skip(SkipMessage)

87
backend/test/tests.go
View file

@ -325,6 +325,93 @@ func TestWrite(t testing.TB) {
}
}
// TestSave tests saving data in the backend.
func TestSave(t testing.TB) {
b := open(t)
defer close(t)
length := rand.Intn(1<<23) + 2000
data := make([]byte, length)
for i := 0; i < 10; i++ {
_, err := io.ReadFull(crand.Reader, data)
OK(t, err)
id := backend.Hash(data)
h := backend.Handle{
Type: backend.Data,
Name: fmt.Sprintf("%s-%d", id, i),
}
err = b.Save(h, data)
OK(t, err)
buf, err := backend.LoadAll(b, h, nil)
OK(t, err)
if len(buf) != len(data) {
t.Fatalf("number of bytes does not match, want %v, got %v", len(data), len(buf))
}
if !bytes.Equal(buf, data) {
t.Fatalf("data not equal")
}
fi, err := b.Stat(h)
OK(t, err)
if fi.Size != int64(len(data)) {
t.Fatalf("Stat() returned different size, want %q, got %d", len(data), fi.Size)
}
err = b.Remove(h.Type, h.Name)
if err != nil {
t.Fatalf("error removing item: %v", err)
}
}
}
var filenameTests = []struct {
name string
data string
}{
{"1dfc6bc0f06cb255889e9ea7860a5753e8eb9665c9a96627971171b444e3113e", "x"},
{"foobar", "foobar"},
{
"1dfc6bc0f06cb255889e9ea7860a5753e8eb9665c9a96627971171b444e3113e4bf8f2d9144cc5420a80f04a4880ad6155fc58903a4fb6457c476c43541dcaa6-5",
"foobar content of data blob",
},
}
// TestSaveFilenames tests saving data with various file names in the backend.
func TestSaveFilenames(t testing.TB) {
b := open(t)
defer close(t)
for i, test := range filenameTests {
h := backend.Handle{Name: test.name, Type: backend.Data}
err := b.Save(h, []byte(test.data))
if err != nil {
t.Errorf("test %d failed: Save() returned %v", i, err)
continue
}
buf, err := backend.LoadAll(b, h, nil)
if err != nil {
t.Errorf("test %d failed: Load() returned %v", i, err)
continue
}
if !bytes.Equal(buf, []byte(test.data)) {
t.Errorf("test %d: returned wrong bytes", i)
}
err = b.Remove(h.Type, h.Name)
if err != nil {
t.Errorf("test %d failed: Remove() returned %v", i, err)
continue
}
}
}
var testStrings = []struct {
id string
data string