func handleMultiPartUpload(req *http.Request, blobReceiver blobserver.Storage) (interface{}, error) {
res := new(protocol.UploadResponse)
receivedBlobs := make([]blob.SizedRef, 0, 4)
multipart, err := req.MultipartReader()
if err != nil {
return nil, newHTTPError(fmt.Sprintf("Expected multipart/form-data POST request; %v", err), http.StatusBadRequest)
}
useFilename := false
req.ParseForm()
if req.FormValue("use-filename") != "" {
useFilename = true
}
for {
mimePart, err := multipart.NextPart()
if err == io.EOF {
break
}
if err != nil {
return nil, newHTTPError(fmt.Sprintf("Error reading multipart section: %v", err), http.StatusBadRequest)
}
contentDisposition, _, err := mime.ParseMediaType(mimePart.Header.Get("Content-Disposition"))
if err != nil {
return nil, newHTTPError("Invalid Content-Disposition", http.StatusBadRequest)
}
if contentDisposition != "form-data" {
return nil, newHTTPError(fmt.Sprintf("Expected Content-Disposition of \"form-data\"; got %q", contentDisposition), http.StatusBadRequest)
}
var ref blob.Ref
var tooBig int64 = blobserver.MaxBlobSize + 1
var readBytes int64
filename := mimePart.FileName()
log.Println("filename:", filename)
if useFilename {
log.Println("Use filename")
ref = blob.NewRefFilename(filename)
} else {
ref = blob.NewRef(filename)
}
blobGot, err := blobReceiver.ReceiveBlob(ref, &readerutil.CountingReader{
Reader: io.LimitReader(mimePart, tooBig),
N: &readBytes,
})
if readBytes == tooBig {
err = fmt.Errorf("blob over the limit of %d bytes", blobserver.MaxBlobSize)
}
if err != nil {
var errmsg string
if log.Severity >= log.LevelInfo {
errmsg = fmt.Sprintf("Error receiving blob (read bytes: %d) %v: %v\n", readBytes, ref, err)
} else {
errmsg = fmt.Sprintf("Error receiving blob: %v\n", err)
}
return nil, newHTTPError(errmsg, http.StatusInternalServerError)
}
log.Printf("Received blob %v\n", blobGot)
receivedBlobs = append(receivedBlobs, blobGot)
}
for _, got := range receivedBlobs {
rv := protocol.RefInfo{
Ref: got.Ref,
Size: uint32(got.Size),
}
if h := got.Hash(); h != nil {
rv.MD5 = hex.EncodeToString(h.Sum(nil))
}
res.Received = append(res.Received, rv)
}
return res, nil
}
