seaweedfs/go/weed/weed_server/volume_server_handlers_sync.go
chrislusf 86cd40fba8 Add "weed backup" command.
This is a pre-cursor for asynchronous replication.
2015-05-26 00:58:41 -07:00

87 lines
2.7 KiB
Go

package weed_server
import (
"fmt"
"net/http"
"github.com/chrislusf/seaweedfs/go/glog"
"github.com/chrislusf/seaweedfs/go/storage"
"github.com/chrislusf/seaweedfs/go/util"
)
func (vs *VolumeServer) getVolumeSyncStatusHandler(w http.ResponseWriter, r *http.Request) {
v, err := vs.getVolume("volume", r)
if v == nil {
writeJsonError(w, r, http.StatusBadRequest, err)
return
}
syncStat := v.GetVolumeSyncStatus()
if syncStat.Error != "" {
writeJsonError(w, r, http.StatusInternalServerError, fmt.Errorf("Get Volume %d status error: %s", v.Id, syncStat.Error))
glog.V(2).Infoln("getVolumeSyncStatusHandler volume =", r.FormValue("volume"), ", error =", err)
} else {
writeJsonQuiet(w, r, http.StatusOK, syncStat)
}
}
func (vs *VolumeServer) getVolumeIndexContentHandler(w http.ResponseWriter, r *http.Request) {
v, err := vs.getVolume("volume", r)
if v == nil {
writeJsonError(w, r, http.StatusBadRequest, err)
return
}
content, err := v.IndexFileContent()
if err != nil {
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
w.Write(content)
}
func (vs *VolumeServer) getVolumeDataContentHandler(w http.ResponseWriter, r *http.Request) {
v, err := vs.getVolume("volume", r)
if v == nil {
writeJsonError(w, r, http.StatusBadRequest, fmt.Errorf("Not Found volume: %v", err))
return
}
if int(v.SuperBlock.CompactRevision) != util.ParseInt(r.FormValue("revision"), 0) {
writeJsonError(w, r, http.StatusExpectationFailed, fmt.Errorf("Requested Volume Revision is %s, but current revision is %d", r.FormValue("revision"), v.SuperBlock.CompactRevision))
return
}
offset := uint32(util.ParseUint64(r.FormValue("offset"), 0))
size := uint32(util.ParseUint64(r.FormValue("size"), 0))
content, err := storage.ReadNeedleBlob(v.DataFile(), int64(offset)*storage.NeedlePaddingSize, size)
if err != nil {
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
id := util.ParseUint64(r.FormValue("id"), 0)
n := new(storage.Needle)
n.ParseNeedleHeader(content)
if id != n.Id {
writeJsonError(w, r, http.StatusNotFound, fmt.Errorf("Expected file entry id %d, but found %d", id, n.Id))
return
}
w.Write(content)
}
func (vs *VolumeServer) getVolume(volumeParameterName string, r *http.Request) (*storage.Volume, error) {
volumeIdString := r.FormValue(volumeParameterName)
if volumeIdString == "" {
err := fmt.Errorf("Empty Volume Id: Need to pass in %s=the_volume_id.", volumeParameterName)
return nil, err
}
vid, err := storage.NewVolumeId(volumeIdString)
if err != nil {
err = fmt.Errorf("Volume Id %s is not a valid unsigned integer", volumeIdString)
return nil, err
}
v := vs.store.GetVolume(vid)
if v == nil {
return nil, fmt.Errorf("Not Found Volume Id %s: %d", volumeIdString, vid)
}
return v, nil
}