// CheckMetadata downloads the metadata about all of the files currently
// stored on Drive and compares it with the local cache.
func (gd *GDrive) CheckMetadata(filename string, report func(string)) error {
idToFile, err := gd.getIdToFile(filename)
if err != nil {
return err
}
// This will almost certainly take a while, so put up a progress bar.
var bar *pb.ProgressBar
if !gd.quiet {
bar = pb.New(len(idToFile))
bar.ShowBar = true
bar.ShowCounters = false
bar.Output = os.Stderr
bar.Prefix("Checking metadata cache: ")
bar.Start()
}
err = gd.runQuery("trashed=false", func(f *drive.File) {
if file, ok := idToFile[f.Id]; ok {
df := newFile(f.Title, f)
if !filesEqual(df, file) {
report(fmt.Sprintf("%s: metadata mismatch.\nLocal: %+v\nDrive: %+v",
file.Path, file, df))
}
if bar != nil {
bar.Increment()
}
delete(idToFile, f.Id)
} else {
// It'd be preferable to have "sharedWithMe=false" included in
// the query string above, but the combination of that with
// "trashed=false" seems to lead to no results being returned.
if f.Shared == false {
report(fmt.Sprintf("%s: found on Drive, not in local cache [%+v]",
f.Title, f))
}
}
})
for _, f := range idToFile {
report(fmt.Sprintf("%s: found in local cache, not on Drive [%+v]",
f.Path, f))
}
if bar != nil {
bar.Finish()
}
return nil
}
func runClusterBackup(args *docopt.Args) error {
client, err := getClusterClient()
if err != nil {
return err
}
var bar *pb.ProgressBar
var progress backup.ProgressBar
if term.IsTerminal(os.Stderr.Fd()) {
bar = pb.New(0)
bar.SetUnits(pb.U_BYTES)
bar.ShowBar = false
bar.ShowSpeed = true
bar.Output = os.Stderr
bar.Start()
progress = bar
}
var dest io.Writer = os.Stdout
if filename := args.String["--file"]; filename != "" {
f, err := os.Create(filename)
if err != nil {
return err
}
defer f.Close()
dest = f
}
fmt.Fprintln(os.Stderr, "Creating cluster backup...")
if err := backup.Run(client, dest, progress); err != nil {
return err
}
if bar != nil {
bar.Finish()
}
fmt.Fprintln(os.Stderr, "Backup complete.")
return nil
}
// PostMultipartP posts a multipart message in the MIME internet format with a callback function with a string stating the upload Progress.
func (c *Client) PostMultipartP(path string, files map[string][]byte, params Params, out interface{}, callback func(s string)) error {
body := &bytes.Buffer{}
writer := multipart.NewWriter(body)
for name, source := range files {
part, err := writer.CreateFormFile(name, "source.tgz")
if err != nil {
return err
}
_, err = io.Copy(part, bytes.NewReader(source))
if err != nil {
return err
}
}
for name, value := range params {
writer.WriteField(name, value)
}
err := writer.Close()
if err != nil {
return err
}
var bodyReader io.Reader
bodyReader = body
var bar *pb.ProgressBar
if callback != nil {
bar = pb.New(body.Len()).SetUnits(pb.U_BYTES)
bar.NotPrint = true
bar.ShowBar = false
bar.Callback = callback
bar.Start()
bodyReader = bar.NewProxyReader(body)
}
req, err := c.request("POST", path, bodyReader)
if err != nil {
return err
}
req.SetBasicAuth("convox", string(c.Password))
req.Header.Set("Content-Type", writer.FormDataContentType())
res, err := c.client().Do(req)
if err != nil {
return err
}
defer res.Body.Close()
if err := responseError(res); err != nil {
return err
}
data, err := ioutil.ReadAll(res.Body)
if err != nil {
return err
}
if out != nil {
err = json.Unmarshal(data, out)
if err != nil {
return err
}
}
if callback != nil {
bar.Finish()
}
return nil
}
func (gd *GDrive) getMetadataChanges(svc *drive.Service, startChangeId int64,
changeChan chan<- []*drive.Change, errorChan chan<- error) {
var about *drive.About
var err error
// Get the Drive About information in order to figure out how many
// changes we need to download to get up to date.
for try := 0; ; try++ {
about, err = svc.About.Get().Do()
if err == nil {
break
} else {
err = gd.tryToHandleDriveAPIError(err, try)
}
if err != nil {
errorChan <- err
return
}
}
// Don't clutter the output with a progress bar unless it looks like
// downloading changes may take a while.
// TODO: consider using timer.AfterFunc to put up the progress bar if
// we're not done after a few seconds? It's not clear if this is worth
// the trouble.
var bar *pb.ProgressBar
numChanges := about.LargestChangeId - startChangeId
if numChanges > 1000 && !gd.quiet {
bar = pb.New64(numChanges)
bar.ShowBar = true
bar.ShowCounters = false
bar.Output = os.Stderr
bar.Prefix("Updating metadata cache: ")
bar.Start()
}
pageToken := ""
try := 0
// Keep asking Drive for more changes until we get through them all.
for {
// Only ask for the fields in the drive.Change structure that we
// actually to be filled in to save some bandwidth...
fields := []googleapi.Field{"nextPageToken",
"items/id", "items/fileId", "items/deleted",
"items/file/id", "items/file/parents", "items/file/title",
"items/file/fileSize", "items/file/mimeType", "items/file/properties",
"items/file/modifiedDate", "items/file/md5Checksum", "items/file/labels"}
q := svc.Changes.List().MaxResults(1000).IncludeSubscribed(false).Fields(fields...)
if startChangeId >= 0 {
q = q.StartChangeId(startChangeId + 1)
}
if pageToken != "" {
q = q.PageToken(pageToken)
}
r, err := q.Do()
if err != nil {
err = gd.tryToHandleDriveAPIError(err, try)
if err != nil {
errorChan <- err
return
}
try++
continue
}
// Success. Reset the try counter in case we had errors leading up
// to this.
try = 0
if len(r.Items) > 0 {
// Send the changes along to the goroutine that's updating the
// local cache.
changeChan <- r.Items
if bar != nil {
bar.Set(int(r.Items[len(r.Items)-1].Id - startChangeId))
}
}
pageToken = string(r.NextPageToken)
if pageToken == "" {
break
}
}
// Signal that no more changes are coming.
close(changeChan)
if bar != nil {
bar.Finish()
}
gd.debug("Done updating metadata from Drive")
}
