func DeleteHandler(w http.ResponseWriter, r *http.Request) { n := new(storage.Needle) vid, fid, _ := parseURLPath(r.URL.Path) volumeId, _ := storage.NewVolumeId(vid) n.ParsePath(fid) debug("deleting", n) cookie := n.Cookie count, ok := store.Read(volumeId, n) if ok != nil { m := make(map[string]uint32) m["size"] = 0 writeJsonQuiet(w, r, m) return } if n.Cookie != cookie { log.Println("delete with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent()) return } n.Size = 0 ret, err := store.Delete(volumeId, n) if err != nil { log.Println("delete error:", err) return } needToReplicate := !store.HasVolume(volumeId) if !needToReplicate && ret > 0 { needToReplicate = store.GetVolume(volumeId).NeedToReplicate() } if needToReplicate { //send to other replica locations if r.FormValue("type") != "standard" { if !distributedOperation(volumeId, func(location operation.Location) bool { return nil == operation.Delete("http://"+location.Url+r.URL.Path+"?type=standard") }) { ret = 0 } } } if ret != 0 { w.WriteHeader(http.StatusAccepted) } else { w.WriteHeader(http.StatusInternalServerError) } m := make(map[string]uint32) m["size"] = uint32(count) writeJsonQuiet(w, r, m) }
func PostHandler(w http.ResponseWriter, r *http.Request) { r.ParseForm() vid, _, _ := parseURLPath(r.URL.Path) volumeId, e := storage.NewVolumeId(vid) if e != nil { writeJson(w, r, e) } else { needle, filename, ne := storage.NewNeedle(r) if ne != nil { writeJson(w, r, ne) } else { ret, err := store.Write(volumeId, needle) errorStatus := "" needToReplicate := !store.HasVolume(volumeId) if err != nil { errorStatus = "Failed to write to local disk (" + err.Error() + ")" } else if ret > 0 { needToReplicate = needToReplicate || store.GetVolume(volumeId).NeedToReplicate() } else { errorStatus = "Failed to write to local disk" } if !needToReplicate && ret > 0 { needToReplicate = store.GetVolume(volumeId).NeedToReplicate() } if needToReplicate { //send to other replica locations if r.FormValue("type") != "standard" { if !distributedOperation(volumeId, func(location operation.Location) bool { _, err := operation.Upload("http://"+location.Url+r.URL.Path+"?type=standard", filename, bytes.NewReader(needle.Data)) return err == nil }) { ret = 0 errorStatus = "Failed to write to replicas for volume " + volumeId.String() } } } m := make(map[string]interface{}) if errorStatus == "" { w.WriteHeader(http.StatusCreated) } else { store.Delete(volumeId, needle) distributedOperation(volumeId, func(location operation.Location) bool { return nil == operation.Delete("http://"+location.Url+r.URL.Path+"?type=standard") }) w.WriteHeader(http.StatusInternalServerError) m["error"] = errorStatus } m["size"] = ret writeJson(w, r, m) } } }
func ReplicatedDelete(masterNode string, store *storage.Store, volumeId storage.VolumeId, n *storage.Needle, r *http.Request) (ret uint32) { ret, err := store.Delete(volumeId, n) if err != nil { log.Println("delete error:", err) return } needToReplicate := !store.HasVolume(volumeId) if !needToReplicate && ret > 0 { needToReplicate = store.GetVolume(volumeId).NeedToReplicate() } if needToReplicate { //send to other replica locations if r.FormValue("type") != "standard" { if !distributedOperation(masterNode, store, volumeId, func(location operation.Location) bool { return nil == operation.Delete("http://"+location.Url+r.URL.Path+"?type=standard") }) { ret = 0 } } } return }
func ReplicatedWrite(masterNode string, s *storage.Store, volumeId storage.VolumeId, needle *storage.Needle, r *http.Request) (size uint32, errorStatus string) { ret, err := s.Write(volumeId, needle) needToReplicate := !s.HasVolume(volumeId) if err != nil { errorStatus = "Failed to write to local disk (" + err.Error() + ")" } else if ret > 0 { needToReplicate = needToReplicate || s.GetVolume(volumeId).NeedToReplicate() } else { errorStatus = "Failed to write to local disk" } if !needToReplicate && ret > 0 { needToReplicate = s.GetVolume(volumeId).NeedToReplicate() } if needToReplicate { //send to other replica locations if r.FormValue("type") != "standard" { if !distributedOperation(masterNode, s, volumeId, func(location operation.Location) bool { _, err := operation.Upload("http://"+location.Url+r.URL.Path+"?type=standard", string(needle.Name), bytes.NewReader(needle.Data)) return err == nil }) { ret = 0 errorStatus = "Failed to write to replicas for volume " + volumeId.String() } } } if errorStatus != "" { if _, err = s.Delete(volumeId, needle); err != nil { errorStatus += "\nCannot delete " + strconv.FormatUint(needle.Id, 10) + " from " + volumeId.String() + ": " + err.Error() } else { distributedOperation(masterNode, s, volumeId, func(location operation.Location) bool { return nil == operation.Delete("http://"+location.Url+r.URL.Path+"?type=standard") }) } } size = ret return }