mirror of
https://github.com/octoleo/restic.git
synced 2024-11-16 18:15:20 +00:00
671 lines
16 KiB
Go
671 lines
16 KiB
Go
// Copyright 2016, Google
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package b2
|
|
|
|
import (
|
|
"io"
|
|
"math/rand"
|
|
"time"
|
|
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
// This file wraps the baseline interfaces with backoff and retry semantics.
|
|
|
|
type beRootInterface interface {
|
|
backoff(error) time.Duration
|
|
reauth(error) bool
|
|
transient(error) bool
|
|
reupload(error) bool
|
|
authorizeAccount(context.Context, string, string, ...ClientOption) error
|
|
reauthorizeAccount(context.Context) error
|
|
createBucket(ctx context.Context, name, btype string, info map[string]string, rules []LifecycleRule) (beBucketInterface, error)
|
|
listBuckets(context.Context) ([]beBucketInterface, error)
|
|
}
|
|
|
|
type beRoot struct {
|
|
account, key string
|
|
b2i b2RootInterface
|
|
}
|
|
|
|
type beBucketInterface interface {
|
|
name() string
|
|
btype() BucketType
|
|
attrs() *BucketAttrs
|
|
updateBucket(context.Context, *BucketAttrs) error
|
|
deleteBucket(context.Context) error
|
|
getUploadURL(context.Context) (beURLInterface, error)
|
|
startLargeFile(ctx context.Context, name, contentType string, info map[string]string) (beLargeFileInterface, error)
|
|
listFileNames(context.Context, int, string, string, string) ([]beFileInterface, string, error)
|
|
listFileVersions(context.Context, int, string, string, string, string) ([]beFileInterface, string, string, error)
|
|
downloadFileByName(context.Context, string, int64, int64) (beFileReaderInterface, error)
|
|
hideFile(context.Context, string) (beFileInterface, error)
|
|
getDownloadAuthorization(context.Context, string, time.Duration) (string, error)
|
|
baseURL() string
|
|
file(string, string) beFileInterface
|
|
}
|
|
|
|
type beBucket struct {
|
|
b2bucket b2BucketInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beURLInterface interface {
|
|
uploadFile(context.Context, io.ReadSeeker, int, string, string, string, map[string]string) (beFileInterface, error)
|
|
}
|
|
|
|
type beURL struct {
|
|
b2url b2URLInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beFileInterface interface {
|
|
name() string
|
|
size() int64
|
|
timestamp() time.Time
|
|
status() string
|
|
deleteFileVersion(context.Context) error
|
|
getFileInfo(context.Context) (beFileInfoInterface, error)
|
|
listParts(context.Context, int, int) ([]beFilePartInterface, int, error)
|
|
compileParts(int64, map[int]string) beLargeFileInterface
|
|
}
|
|
|
|
type beFile struct {
|
|
b2file b2FileInterface
|
|
url beURLInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beLargeFileInterface interface {
|
|
finishLargeFile(context.Context) (beFileInterface, error)
|
|
getUploadPartURL(context.Context) (beFileChunkInterface, error)
|
|
}
|
|
|
|
type beLargeFile struct {
|
|
b2largeFile b2LargeFileInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beFileChunkInterface interface {
|
|
reload(context.Context) error
|
|
uploadPart(context.Context, io.ReadSeeker, string, int, int) (int, error)
|
|
}
|
|
|
|
type beFileChunk struct {
|
|
b2fileChunk b2FileChunkInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beFileReaderInterface interface {
|
|
io.ReadCloser
|
|
stats() (int, string, string, map[string]string)
|
|
id() string
|
|
}
|
|
|
|
type beFileReader struct {
|
|
b2fileReader b2FileReaderInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beFileInfoInterface interface {
|
|
stats() (string, string, int64, string, map[string]string, string, time.Time)
|
|
}
|
|
|
|
type beFilePartInterface interface {
|
|
number() int
|
|
sha1() string
|
|
size() int64
|
|
}
|
|
|
|
type beFilePart struct {
|
|
b2filePart b2FilePartInterface
|
|
ri beRootInterface
|
|
}
|
|
|
|
type beFileInfo struct {
|
|
name string
|
|
sha string
|
|
size int64
|
|
ct string
|
|
info map[string]string
|
|
status string
|
|
stamp time.Time
|
|
}
|
|
|
|
func (r *beRoot) backoff(err error) time.Duration { return r.b2i.backoff(err) }
|
|
func (r *beRoot) reauth(err error) bool { return r.b2i.reauth(err) }
|
|
func (r *beRoot) reupload(err error) bool { return r.b2i.reupload(err) }
|
|
func (r *beRoot) transient(err error) bool { return r.b2i.transient(err) }
|
|
|
|
func (r *beRoot) authorizeAccount(ctx context.Context, account, key string, opts ...ClientOption) error {
|
|
f := func() error {
|
|
if err := r.b2i.authorizeAccount(ctx, account, key, opts...); err != nil {
|
|
return err
|
|
}
|
|
r.account = account
|
|
r.key = key
|
|
return nil
|
|
}
|
|
return withBackoff(ctx, r, f)
|
|
}
|
|
|
|
func (r *beRoot) reauthorizeAccount(ctx context.Context) error {
|
|
return r.authorizeAccount(ctx, r.account, r.key)
|
|
}
|
|
|
|
func (r *beRoot) createBucket(ctx context.Context, name, btype string, info map[string]string, rules []LifecycleRule) (beBucketInterface, error) {
|
|
var bi beBucketInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
bucket, err := r.b2i.createBucket(ctx, name, btype, info, rules)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
bi = &beBucket{
|
|
b2bucket: bucket,
|
|
ri: r,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, r, g)
|
|
}
|
|
if err := withBackoff(ctx, r, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return bi, nil
|
|
}
|
|
|
|
func (r *beRoot) listBuckets(ctx context.Context) ([]beBucketInterface, error) {
|
|
var buckets []beBucketInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
bs, err := r.b2i.listBuckets(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, b := range bs {
|
|
buckets = append(buckets, &beBucket{
|
|
b2bucket: b,
|
|
ri: r,
|
|
})
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, r, g)
|
|
}
|
|
if err := withBackoff(ctx, r, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return buckets, nil
|
|
}
|
|
|
|
func (b *beBucket) name() string {
|
|
return b.b2bucket.name()
|
|
}
|
|
|
|
func (b *beBucket) btype() BucketType {
|
|
return BucketType(b.b2bucket.btype())
|
|
}
|
|
|
|
func (b *beBucket) attrs() *BucketAttrs {
|
|
return b.b2bucket.attrs()
|
|
}
|
|
|
|
func (b *beBucket) updateBucket(ctx context.Context, attrs *BucketAttrs) error {
|
|
f := func() error {
|
|
g := func() error {
|
|
return b.b2bucket.updateBucket(ctx, attrs)
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
return withBackoff(ctx, b.ri, f)
|
|
}
|
|
|
|
func (b *beBucket) deleteBucket(ctx context.Context) error {
|
|
f := func() error {
|
|
g := func() error {
|
|
return b.b2bucket.deleteBucket(ctx)
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
return withBackoff(ctx, b.ri, f)
|
|
}
|
|
|
|
func (b *beBucket) getUploadURL(ctx context.Context) (beURLInterface, error) {
|
|
var url beURLInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
u, err := b.b2bucket.getUploadURL(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
url = &beURL{
|
|
b2url: u,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return url, nil
|
|
}
|
|
|
|
func (b *beBucket) startLargeFile(ctx context.Context, name, ct string, info map[string]string) (beLargeFileInterface, error) {
|
|
var file beLargeFileInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
f, err := b.b2bucket.startLargeFile(ctx, name, ct, info)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
file = &beLargeFile{
|
|
b2largeFile: f,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return file, nil
|
|
}
|
|
|
|
func (b *beBucket) listFileNames(ctx context.Context, count int, continuation, prefix, delimiter string) ([]beFileInterface, string, error) {
|
|
var cont string
|
|
var files []beFileInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
fs, c, err := b.b2bucket.listFileNames(ctx, count, continuation, prefix, delimiter)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
cont = c
|
|
for _, f := range fs {
|
|
files = append(files, &beFile{
|
|
b2file: f,
|
|
ri: b.ri,
|
|
})
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, "", err
|
|
}
|
|
return files, cont, nil
|
|
}
|
|
|
|
func (b *beBucket) listFileVersions(ctx context.Context, count int, nextName, nextID, prefix, delimiter string) ([]beFileInterface, string, string, error) {
|
|
var name, id string
|
|
var files []beFileInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
fs, n, d, err := b.b2bucket.listFileVersions(ctx, count, nextName, nextID, prefix, delimiter)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
name = n
|
|
id = d
|
|
for _, f := range fs {
|
|
files = append(files, &beFile{
|
|
b2file: f,
|
|
ri: b.ri,
|
|
})
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, "", "", err
|
|
}
|
|
return files, name, id, nil
|
|
}
|
|
|
|
func (b *beBucket) downloadFileByName(ctx context.Context, name string, offset, size int64) (beFileReaderInterface, error) {
|
|
var reader beFileReaderInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
fr, err := b.b2bucket.downloadFileByName(ctx, name, offset, size)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
reader = &beFileReader{
|
|
b2fileReader: fr,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return reader, nil
|
|
}
|
|
|
|
func (b *beBucket) hideFile(ctx context.Context, name string) (beFileInterface, error) {
|
|
var file beFileInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
f, err := b.b2bucket.hideFile(ctx, name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
file = &beFile{
|
|
b2file: f,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return file, nil
|
|
}
|
|
|
|
func (b *beBucket) getDownloadAuthorization(ctx context.Context, p string, v time.Duration) (string, error) {
|
|
var tok string
|
|
f := func() error {
|
|
g := func() error {
|
|
t, err := b.b2bucket.getDownloadAuthorization(ctx, p, v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
tok = t
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return "", err
|
|
}
|
|
return tok, nil
|
|
}
|
|
|
|
func (b *beBucket) baseURL() string {
|
|
return b.b2bucket.baseURL()
|
|
}
|
|
|
|
func (b *beBucket) file(id, name string) beFileInterface {
|
|
return &beFile{
|
|
b2file: b.b2bucket.file(id, name),
|
|
ri: b.ri,
|
|
}
|
|
}
|
|
|
|
func (b *beURL) uploadFile(ctx context.Context, r io.ReadSeeker, size int, name, ct, sha1 string, info map[string]string) (beFileInterface, error) {
|
|
var file beFileInterface
|
|
f := func() error {
|
|
if _, err := r.Seek(0, 0); err != nil {
|
|
return err
|
|
}
|
|
f, err := b.b2url.uploadFile(ctx, r, size, name, ct, sha1, info)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
file = &beFile{
|
|
b2file: f,
|
|
url: b,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return file, nil
|
|
}
|
|
|
|
func (b *beFile) deleteFileVersion(ctx context.Context) error {
|
|
f := func() error {
|
|
g := func() error {
|
|
return b.b2file.deleteFileVersion(ctx)
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
return withBackoff(ctx, b.ri, f)
|
|
}
|
|
|
|
func (b *beFile) size() int64 {
|
|
return b.b2file.size()
|
|
}
|
|
|
|
func (b *beFile) name() string {
|
|
return b.b2file.name()
|
|
}
|
|
|
|
func (b *beFile) timestamp() time.Time {
|
|
return b.b2file.timestamp()
|
|
}
|
|
|
|
func (b *beFile) status() string {
|
|
return b.b2file.status()
|
|
}
|
|
|
|
func (b *beFile) getFileInfo(ctx context.Context) (beFileInfoInterface, error) {
|
|
var fileInfo beFileInfoInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
fi, err := b.b2file.getFileInfo(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
name, sha, size, ct, info, status, stamp := fi.stats()
|
|
fileInfo = &beFileInfo{
|
|
name: name,
|
|
sha: sha,
|
|
size: size,
|
|
ct: ct,
|
|
info: info,
|
|
status: status,
|
|
stamp: stamp,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return fileInfo, nil
|
|
}
|
|
|
|
func (b *beFile) listParts(ctx context.Context, next, count int) ([]beFilePartInterface, int, error) {
|
|
var fpi []beFilePartInterface
|
|
var rnxt int
|
|
f := func() error {
|
|
g := func() error {
|
|
ps, n, err := b.b2file.listParts(ctx, next, count)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
rnxt = n
|
|
for _, p := range ps {
|
|
fpi = append(fpi, &beFilePart{
|
|
b2filePart: p,
|
|
ri: b.ri,
|
|
})
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, 0, err
|
|
}
|
|
return fpi, rnxt, nil
|
|
}
|
|
|
|
func (b *beFile) compileParts(size int64, seen map[int]string) beLargeFileInterface {
|
|
return &beLargeFile{
|
|
b2largeFile: b.b2file.compileParts(size, seen),
|
|
ri: b.ri,
|
|
}
|
|
}
|
|
|
|
func (b *beLargeFile) getUploadPartURL(ctx context.Context) (beFileChunkInterface, error) {
|
|
var chunk beFileChunkInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
fc, err := b.b2largeFile.getUploadPartURL(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
chunk = &beFileChunk{
|
|
b2fileChunk: fc,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return chunk, nil
|
|
}
|
|
|
|
func (b *beLargeFile) finishLargeFile(ctx context.Context) (beFileInterface, error) {
|
|
var file beFileInterface
|
|
f := func() error {
|
|
g := func() error {
|
|
f, err := b.b2largeFile.finishLargeFile(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
file = &beFile{
|
|
b2file: f,
|
|
ri: b.ri,
|
|
}
|
|
return nil
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return nil, err
|
|
}
|
|
return file, nil
|
|
}
|
|
|
|
func (b *beFileChunk) reload(ctx context.Context) error {
|
|
f := func() error {
|
|
g := func() error {
|
|
return b.b2fileChunk.reload(ctx)
|
|
}
|
|
return withReauth(ctx, b.ri, g)
|
|
}
|
|
return withBackoff(ctx, b.ri, f)
|
|
}
|
|
|
|
func (b *beFileChunk) uploadPart(ctx context.Context, r io.ReadSeeker, sha1 string, size, index int) (int, error) {
|
|
// no re-auth; pass it back up to the caller so they can get an new upload URI and token
|
|
// TODO: we should handle that here probably
|
|
var i int
|
|
f := func() error {
|
|
if _, err := r.Seek(0, 0); err != nil {
|
|
return err
|
|
}
|
|
j, err := b.b2fileChunk.uploadPart(ctx, r, sha1, size, index)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
i = j
|
|
return nil
|
|
}
|
|
if err := withBackoff(ctx, b.ri, f); err != nil {
|
|
return 0, err
|
|
}
|
|
return i, nil
|
|
}
|
|
|
|
func (b *beFileReader) Read(p []byte) (int, error) {
|
|
return b.b2fileReader.Read(p)
|
|
}
|
|
|
|
func (b *beFileReader) Close() error {
|
|
return b.b2fileReader.Close()
|
|
}
|
|
|
|
func (b *beFileReader) stats() (int, string, string, map[string]string) {
|
|
return b.b2fileReader.stats()
|
|
}
|
|
|
|
func (b *beFileReader) id() string { return b.b2fileReader.id() }
|
|
|
|
func (b *beFileInfo) stats() (string, string, int64, string, map[string]string, string, time.Time) {
|
|
return b.name, b.sha, b.size, b.ct, b.info, b.status, b.stamp
|
|
}
|
|
|
|
func (b *beFilePart) number() int { return b.b2filePart.number() }
|
|
func (b *beFilePart) sha1() string { return b.b2filePart.sha1() }
|
|
func (b *beFilePart) size() int64 { return b.b2filePart.size() }
|
|
|
|
func jitter(d time.Duration) time.Duration {
|
|
f := float64(d)
|
|
f /= 50
|
|
f += f * (rand.Float64() - 0.5)
|
|
return time.Duration(f)
|
|
}
|
|
|
|
func getBackoff(d time.Duration) time.Duration {
|
|
if d > 15*time.Second {
|
|
return d + jitter(d)
|
|
}
|
|
return d*2 + jitter(d*2)
|
|
}
|
|
|
|
var after = time.After
|
|
|
|
func withBackoff(ctx context.Context, ri beRootInterface, f func() error) error {
|
|
backoff := 500 * time.Millisecond
|
|
for {
|
|
err := f()
|
|
if !ri.transient(err) {
|
|
return err
|
|
}
|
|
bo := ri.backoff(err)
|
|
if bo > 0 {
|
|
backoff = bo
|
|
} else {
|
|
backoff = getBackoff(backoff)
|
|
}
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
case <-after(backoff):
|
|
}
|
|
}
|
|
}
|
|
|
|
func withReauth(ctx context.Context, ri beRootInterface, f func() error) error {
|
|
err := f()
|
|
if ri.reauth(err) {
|
|
if err := ri.reauthorizeAccount(ctx); err != nil {
|
|
return err
|
|
}
|
|
err = f()
|
|
}
|
|
return err
|
|
}
|