func (d *Downloader) download(localId int64, remoteId string, checksum string) {
// TODO: handle all error cases, make sure queue is not blocked
// with erroneous files
logger.V("Downloading", remoteId, checksum)
var (
resp *http.Response
err error
)
if resp, err = d.client.Get(baseUrlDownloadHost + "/" + remoteId); err != nil {
logger.V("error downloading", remoteId, err)
return
}
if resp.StatusCode == 404 {
d.metaService.SetOp(localId, metadata.OpNone)
logger.V("error downloading [not found]", remoteId)
return
}
if resp.StatusCode < 200 || resp.StatusCode > 299 {
logger.V("error downloading [not ok]", remoteId, resp.StatusCode)
return
}
defer resp.Body.Close()
err = d.blobMngr.Save(localId, checksum, resp.Body)
if err != nil {
logger.V(err)
return
}
d.metaService.SetOp(localId, metadata.OpNone)
}
func (d *CachedSyncer) Sync(isForce bool) (err error) {
d.mu.Lock()
defer d.mu.Unlock()
logger.V("Started syncer...")
err = d.syncInbound(isForce)
if err != nil {
logger.V("error during sync", err)
return
}
logger.V("Done syncing...")
return
}
func main() {
flag.Parse()
// add a lock to the config dir, no two instances should
// run at the same time
cfg := config.NewConfig(*flagDataDir)
err := cfg.Setup()
if err != nil {
logger.F("Error initializing configuration.", err)
}
if *flagRunAuthWizard {
cmd.RunAuthWizard(cfg)
os.Exit(0)
}
err = cfg.Load()
if err != nil {
logger.F("Did you mean --wizard? Error reading configuration.", err)
}
transport := auth.NewTransport(cfg.FirstAccount())
metaService, _ = metadata.New(cfg.MetadataPath())
blobManager = blob.New(cfg.BlobPath())
syncManager := syncer.NewCachedSyncer(
transport,
metaService,
blobManager)
if *flagBlockSync {
syncManager.Sync(true)
}
syncManager.Start()
logger.V("mounting...")
mountpoint := cfg.FirstAccount().LocalPath
// TODO: Better error checking here. All sorts of things like stale
// mounts will surface at this moment.
err = os.MkdirAll(mountpoint, 0774)
if err != nil {
logger.V(err)
}
shutdownChan := make(chan io.Closer, 1)
go gracefulShutDown(shutdownChan, mountpoint)
if err = mount.MountAndServe(mountpoint, metaService, blobManager); err != nil {
logger.F(err)
}
}
func (d *CachedSyncer) mergeChanges(isInitialSync bool, rootId string, startChangeId int64, pageToken string) (nextPageToken string, err error) {
logger.V("merging changes starting with pageToken:", pageToken, "and startChangeId", startChangeId)
req := d.remoteService.Changes.List()
req.IncludeSubscribed(false)
if pageToken != "" {
req.PageToken(pageToken)
} else if startChangeId > 0 { // can't set page token and start change mutually
req.StartChangeId(startChangeId)
}
if isInitialSync {
req.IncludeDeleted(false)
}
var changes *client.ChangeList
if changes, err = req.Do(); err != nil {
return
}
var largestId int64
nextPageToken = changes.NextPageToken
for _, item := range changes.Items {
if err = d.mergeChange(rootId, item); err != nil {
return
}
largestId = item.Id
}
if largestId > 0 {
// persist largest change id
d.metaService.SaveLargestChangeId(largestId)
}
return
}
func gracefulShutDown(shutdownc <-chan io.Closer, mountpoint string) {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGTERM, syscall.SIGINT)
select {
case <-c:
logger.V("Gracefully shutting down...")
mount.Umount(mountpoint)
// TODO(burcud): Handle Umount errors
go func() {
<-time.After(3 * time.Second)
logger.V("Couldn't umount, do it manually, now shutting down...")
os.Exit(1)
}()
}
}
func (f *Manager) cleanup(id int64, checksum string) (err error) {
var blobs []os.FileInfo
if blobs, err = ioutil.ReadDir(f.getBlobDir(id)); err != nil {
return
}
for _, file := range blobs {
if file.Name() != f.getBlobName(id, checksum) && strings.Contains(file.Name(), f.getBlobName(id, "")) {
logger.V("Deleting blob", file.Name())
// errors are not show stoppers here, they will cost additional disk space
// we can get rid of on the next removal try.
if rmErr := os.Remove(path.Join(f.getBlobDir(id), file.Name())); rmErr != nil {
logger.V(rmErr)
}
}
}
return nil
}
// Persists the largest change id synchnonized.
func (m *MetaService) SaveLargestChangeId(id int64) error {
m.mu.Lock()
defer m.mu.Unlock()
logger.V("Saving largest change Id", id)
e := &KeyValueEntry{Key: keyLargestChangeId, Value: fmt.Sprintf("%d", id)}
val, err := m.getKey(keyLargestChangeId)
if err != nil {
return err
}
if val == "" {
return m.dbmap.Insert(e)
}
_, err = m.dbmap.Update(e)
return err
}
func (m *MetaService) RemoteRm(remoteId string) (err error) {
m.mu.Lock()
defer m.mu.Unlock()
// TODO: Handle directories recursively
logger.V("Deleting metadata for", remoteId)
var file *CachedDriveFile
if file, err = m.getByRemoteId(remoteId); err != nil {
return err
}
if file == nil {
return
}
file.Op = OpDelete
_, err = m.dbmap.Update(file)
return err
}
// Permanently saves a file/folder's metadata.
func (m *MetaService) RemoteMod(remoteId string, newParentRemoteId string, data *CachedDriveFile) (err error) {
m.mu.Lock()
defer m.mu.Unlock()
logger.V("Caching metadata for", remoteId)
var parentFile *CachedDriveFile
if newParentRemoteId != "" {
if parentFile, err = m.getByRemoteId(newParentRemoteId); err != nil {
return err
}
}
var file *CachedDriveFile
if file, err = m.getByRemoteId(remoteId); err != nil {
return err
}
if file == nil {
file = &CachedDriveFile{Id: remoteId}
}
if data.Md5Checksum != file.Md5Checksum && !data.IsDir {
file.Op = OpDownload
}
file.Id = remoteId
file.Name = data.Name
file.LastMod = data.LastMod
file.Md5Checksum = data.Md5Checksum
file.LastEtag = data.LastEtag
file.FileSize = data.FileSize
file.IsDir = data.IsDir
file.LocalParentId = 0
if parentFile != nil {
file.LocalParentId = parentFile.LocalId
}
if file.LocalId > 0 {
_, err = m.dbmap.Update(file)
return
}
return m.dbmap.Insert(file)
}