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/
handle.go
94 lines (86 loc) · 2.59 KB
/
handle.go
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package svfs
import (
"fmt"
"io"
"time"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"golang.org/x/net/context"
)
type ObjectHandle struct {
target *Object
rd io.ReadCloser
wd io.WriteCloser
wroteSegment bool
segmentID uint
uploaded uint64
segmentPrefix string
segmentPath string
}
func (fh *ObjectHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
resp.Data = make([]byte, req.Size)
io.ReadFull(fh.rd, resp.Data)
return nil
}
func (fh *ObjectHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
if fh.rd != nil {
fh.rd.Close()
}
if fh.wd != nil {
fh.wd.Close()
if fh.wroteSegment {
// Create the manifest
headers := map[string]string{ManifestHeader: fh.target.cs.Name + "/" + fh.segmentPrefix, "Content-Length": "0"}
SwiftConnection.ObjectDelete(fh.target.c.Name, fh.target.so.Name)
manifest, err := SwiftConnection.ObjectCreate(fh.target.c.Name, fh.target.so.Name, false, "", ObjContentType, headers)
if err != nil {
return err
}
manifest.Write(nil)
manifest.Close()
}
DirectoryCache.Set(fh.target.c.Name, fh.target.path, fh.target.name, fh.target)
}
return nil
}
func (fh *ObjectHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) (err error) {
if fh.uploaded+uint64(len(req.Data)) <= uint64(SegmentSize) {
// File size is less than the size of a segment
// or we didn't filled the current segment yet.
if _, err := fh.wd.Write(req.Data); err != nil {
return err
}
fh.uploaded += uint64(len(req.Data))
fh.target.so.Bytes += int64(fh.uploaded)
goto EndWrite
}
if fh.uploaded+uint64(len(req.Data)) > uint64(SegmentSize) {
if !fh.wroteSegment {
// File size is greater than the size of a segment
// Move it to the segment directory and start writing
// next segment.
fh.wd.Close()
fh.wroteSegment = true
fh.segmentPrefix = fmt.Sprintf("%s/%d", fh.target.path, time.Now().Unix())
fh.segmentPath = segmentPath(fh.segmentPrefix, &fh.segmentID)
if err := SwiftConnection.ObjectMove(fh.target.c.Name, fh.target.path, fh.target.cs.Name, fh.segmentPath); err != nil {
return err
}
}
fh.wd.Close()
fh.wd, err = createAndWriteSegment(fh.target.cs.Name, fh.segmentPrefix, &fh.segmentID, fh.target.so, req.Data, &fh.uploaded)
if err != nil {
return err
}
goto EndWrite
}
EndWrite:
resp.Size = len(req.Data)
return nil
}
var (
_ fs.Handle = (*ObjectHandle)(nil)
_ fs.HandleReleaser = (*ObjectHandle)(nil)
_ fs.HandleReader = (*ObjectHandle)(nil)
_ fs.HandleWriter = (*ObjectHandle)(nil)
)