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qnbox.go
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qnbox.go
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package qnbox
import (
"io"
"os"
"errors"
"strconv"
// "log"
"sync"
"net/http"
"encoding/base64"
"hash/crc32"
"qnbox/rpc"
"qnbox/oauth"
"qnbox/fs"
"qnbox/utils/bytes"
)
const (
InvalidCtx = 701 // UP: 无效的上下文(bput),可能情况:Ctx非法或者已经被淘汰(太久未使用)
)
func EncodeURI(uri string) string {
return base64.URLEncoding.EncodeToString([]byte(uri))
}
type Config struct {
Host map[string]string `json:"HOST"`
Access_key string `json:"ACCESS_KEY"`
Access_secret string `json:"SECRET_KEY"`
// Use for resumable put
BlockBits uint `json:"BLOCK_BITS"`
ChunkSize int64 `json:"PUT_CHUNK_SIZE"`
PutRetryTimes int `json:"PUT_RETRY_TIMES"`
ExpiresTime int `json:"EXPIRES_TIME"`
}
type Service struct {
Config
Conn rpc.Client
}
func New(c Config) *Service {
key := c.Access_key
secret := c.Access_secret
t := oauth.NewTransport(key, secret, nil)
client := &http.Client{Transport: t}
return &Service{c, rpc.Client{client}}
}
func (s *Service) Get(localfile, entryURI string) (code int, err error) {
f, err := os.OpenFile(localfile, os.O_WRONLY, 0644)
if err != nil {
return
}
o := &fs.Object {
EntryURI: entryURI,
Body: f,
}
return s.GetObject(o)
}
func (s *Service) Put(entryURI, mimeType, localfile string) (code int, err error) {
f, err := os.Open(localfile)
if err != nil {
return
}
fi, err := os.Stat(localfile)
if err != nil {
return
}
o := &fs.Object {
EntryURI: entryURI,
Type: mimeType,
Size: fi.Size(),
Body: f,
}
/* Single mode upload */
// return s.PutObject(o)
/* Resumable mode upload */
return s.ResumablePut(o)
}
func (s *Service) Delete(entryURI string) (code int, err error) {
o := &fs.Object {
EntryURI: entryURI,
}
return s.DelObject(o)
}
func (s *Service) PutObject(o *fs.Object) (code int, err error) {
url := s.Host["io"] + "/rs-put/" + EncodeURI(o.EntryURI)
if o.Type != "" {
url += "/mimeType/" + EncodeURI(o.Type)
}
code, err = s.Conn.CallWith64(o, url, "application/octet-stream", o.Body, o.Size)
return
}
func (s *Service) GetObject(o *fs.Object) (code int, err error) {
url := s.Host["rs"] + "/get/" + EncodeURI(o.EntryURI)
if o.Hash != "" {
url += "/base/" + o.Hash
}
if o.Expiry > 0 {
url += "/expires/" + strconv.Itoa(o.Expiry)
}
code, err = s.Conn.Call(o, url)
if code/100 == 2 && o.Body != nil {
code, err = s.Conn.Download(o.Body, o.URL)
}
return
}
func (s *Service) StatObject(o *fs.Object) (code int, err error) {
url := s.Host["rs"] + "/stat/" + EncodeURI(o.EntryURI)
code, err = s.Conn.Call(o, url)
return
}
func (s *Service) DelObject(o *fs.Object) (code int, err error) {
url := s.Host["rs"] + "/delete/" + EncodeURI(o.EntryURI)
return s.Conn.Call(nil, url)
}
func (s *Service) MoveObject(do *fs.Object, so *fs.Object) (code int, err error) {
url := s.Host["rs"] + "/move/" + EncodeURI(so.EntryURI) + "/" + EncodeURI(do.EntryURI)
return s.Conn.Call(nil, url)
}
func (s *Service) CopyObject(do *fs.Object, so *fs.Object) (code int, err error) {
url := s.Host["rs"] + "/copy/" + EncodeURI(so.EntryURI) + "/" + EncodeURI(do.EntryURI)
return s.Conn.Call(nil, url)
}
func (s *Service) NewBucket(b *fs.Bucket) (code int, err error) {
url := s.Host["rs"] + "/mkbucket/" + EncodeURI(b.EntryURI)
return s.Conn.Call(nil, url)
}
func (s *Service) DropBucket(b *fs.Bucket) (code int, err error) {
url := s.Host["rs"] + "/drop/" + EncodeURI(b.EntryURI)
return s.Conn.Call(nil, url)
}
func (s *Service) ListBucket(b *fs.Bucket) (code int, err error) {
return
}
// ---------
type putRet struct {
Ctx string `json:"ctx"`
Checksum string `json:"checksum"`
Crc32 uint32 `json:"crc32"`
Offset uint32 `json:"offset"`
}
func (s *Service) putBlock(o *fs.Object, Idx int) (code int, err error) {
var (
ret putRet
url string
)
h := crc32.NewIEEE()
prog := o.Progress[Idx]
offbase := int64(Idx << s.BlockBits)
initProg := func(p *fs.Block) {
if Idx == len(o.Progress) - 1 {
p.RestSize = o.Size - offbase
} else {
p.RestSize = 1 << s.BlockBits
}
p.Offset = 0
p.Ctx = ""
p.Checksum = ""
}
if prog.Ctx == "" {
initProg(prog)
}
for prog.RestSize > 0 {
bdlen := s.ChunkSize
if bdlen > prog.RestSize {
bdlen = prog.RestSize
}
retry := s.PutRetryTimes
lzRetry:
h.Reset()
bd1 := io.NewSectionReader(o.Body, int64(offbase + prog.Offset), int64(bdlen))
bd := io.TeeReader(bd1, h)
if prog.Ctx == "" {
url = s.Host["up"] + "/mkblk/" + strconv.FormatInt(prog.RestSize, 10)
} else {
url = s.Host["up"] + "/bput/" + prog.Ctx + "/" + strconv.FormatInt(prog.Offset, 10)
}
code, err = s.Conn.CallWith(&ret, url, "application/octet-stream", bd, int(bdlen))
if err == nil {
if ret.Crc32 == h.Sum32() {
prog.Ctx = ret.Ctx
prog.Offset += bdlen
prog.RestSize -= bdlen
continue
} else {
err = errors.New("ResumableBlockPut: Invalid Checksum")
}
}
if code == InvalidCtx {
initProg(prog)
continue // retry upload current block
}
if retry > 0 {
retry--
goto lzRetry
}
break
}
return
}
func (s *Service) mkObject(o *fs.Object) (code int, err error) {
var (
ctx string
)
for k,p := range o.Progress {
if k == len(o.Progress) - 1 {
ctx += p.Ctx
} else {
ctx += p.Ctx + ","
}
}
bd := []byte(ctx)
url := s.Host["up"] + "/rs-mkfile/" + EncodeURI(o.EntryURI) + "/fsize/" + strconv.FormatInt(o.Size, 10)
code, err = s.Conn.CallWith(nil, url, "", bytes.NewReader(bd), len(bd))
return
}
func (s *Service) ResumablePut(o *fs.Object) (code int, err error) {
var (
wg sync.WaitGroup
failed bool
)
blockcnt := int((o.Size + (1 << s.BlockBits) - 1) >> s.BlockBits)
o.Progress = make([]*fs.Block, blockcnt)
wg.Add(blockcnt)
for i := 0; i < blockcnt; i++ {
o.Progress[i] = &fs.Block{}
blkIdx := i
task := func() {
defer wg.Done()
code, err = s.putBlock(o, blkIdx)
if err != nil {
failed = true
}
}
go task()
}
wg.Wait()
if failed {
return 400, errors.New("ResumableBlockPut haven't done")
}
return s.mkObject(o)
}