extern/rclone
1
0
Fork 0
mirror of https://github.com/rclone/rclone.git synced 2024-11-23 00:43:49 +01:00
Code Issues Packages Projects Releases Wiki Activity

dropbox: buffer the chunks when uploading large files so they can be retried

Browse Source 
We use fs.RepeatableReader to buffer the chunks which plays nice with
the accounting.  The default chunk size is 128M which may be too
large.

Fixes #1806
This commit is contained in:
Nick Craig-Wood 2017-11-08 09:18:16 +00:00
parent 159fce0106
commit 6f61da5c75
1 changed files with 22 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
dropbox/dropbox.go
View File

@ -1,7 +1,6 @@
// Package dropbox provides an interface to Dropbox object storage
package dropbox
// FIXME buffer chunks for retries in upload
// FIXME dropbox for business would be quite easy to add
/*
@ -805,8 +804,6 @@ func (o *Object) Open(options ...fs.OpenOption) (in io.ReadCloser, err error) {
// Will work optimally if size is >= uploadChunkSize. If the size is either
// unknown (i.e. -1) or smaller than uploadChunkSize, the method incurs an
// avoidable request to the Dropbox API that does not carry payload.
//
// FIXME buffer chunks to improve upload retries
func (o *Object) uploadChunked(in0 io.Reader, commitInfo *files.CommitInfo, size int64) (entry *files.FileMetadata, err error) {
chunkSize := int64(uploadChunkSize)
chunks := 0
@ -828,8 +825,13 @@ func (o *Object) uploadChunked(in0 io.Reader, commitInfo *files.CommitInfo, size
// write the first chunk
fmtChunk(1, false)
var res *files.UploadSessionStartResult
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
res, err = o.fs.srv.UploadSessionStart(&files.UploadSessionStartArg{}, &io.LimitedReader{R: in, N: chunkSize})
chunk := fs.NewRepeatableReader(&io.LimitedReader{R: in, N: chunkSize})
err = o.fs.pacer.Call(func() (bool, error) {
// seek to the start in case this is a retry
if _, err = chunk.Seek(0, 0); err != nil {
return false, nil
}
res, err = o.fs.srv.UploadSessionStart(&files.UploadSessionStartArg{}, chunk)
return shouldRetry(err)
})
if err != nil {
@ -859,8 +861,13 @@ func (o *Object) uploadChunked(in0 io.Reader, commitInfo *files.CommitInfo, size
}
cursor.Offset = in.BytesRead()
fmtChunk(currentChunk, false)
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
err = o.fs.srv.UploadSessionAppendV2(&appendArg, &io.LimitedReader{R: in, N: chunkSize})
chunk = fs.NewRepeatableReader(&io.LimitedReader{R: in, N: chunkSize})
err = o.fs.pacer.Call(func() (bool, error) {
// seek to the start in case this is a retry
if _, err = chunk.Seek(0, 0); err != nil {
return false, nil
}
err = o.fs.srv.UploadSessionAppendV2(&appendArg, chunk)
return shouldRetry(err)
})
if err != nil {
@ -876,8 +883,13 @@ func (o *Object) uploadChunked(in0 io.Reader, commitInfo *files.CommitInfo, size
Commit: commitInfo,
}
fmtChunk(currentChunk, true)
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
entry, err = o.fs.srv.UploadSessionFinish(args, in)
chunk = fs.NewRepeatableReader(in)
err = o.fs.pacer.Call(func() (bool, error) {
// seek to the start in case this is a retry
if _, err = chunk.Seek(0, 0); err != nil {
return false, nil
}
entry, err = o.fs.srv.UploadSessionFinish(args, chunk)
return shouldRetry(err)
})
if err != nil {
@ -921,7 +933,7 @@ func (o *Object) Update(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOptio
// Remove an object
func (o *Object) Remove() (err error) {
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
err = o.fs.pacer.Call(func() (bool, error) {
_, err = o.fs.srv.DeleteV2(&files.DeleteArg{Path: o.remotePath()})
return shouldRetry(err)
})