func changefeed(logger ctxu.Logger, store storage.MetaStore, imageName, changeID string, records int64) ([]byte, error) {
changes, err := store.GetChanges(changeID, int(records), imageName)
if err != nil {
logger.Errorf("%d GET could not retrieve records: %s", http.StatusInternalServerError, err.Error())
return nil, errors.ErrUnknown.WithDetail(err)
}
out, err := json.Marshal(&changefeedResponse{
NumberOfRecords: len(changes),
Records: changes,
})
if err != nil {
logger.Errorf("%d GET could not json.Marshal changefeedResponse", http.StatusInternalServerError)
return nil, errors.ErrUnknown.WithDetail(err)
}
return out, nil
}
func serveError(log ctxu.Logger, w http.ResponseWriter, err error) {
if httpErr, ok := err.(errcode.Error); ok {
// info level logging for non-5XX http errors
httpErrCode := httpErr.ErrorCode().Descriptor().HTTPStatusCode
if httpErrCode >= http.StatusInternalServerError {
// error level logging for 5XX http errors
log.Errorf("%s: %s: %v", httpErr.ErrorCode().Error(), httpErr.Message, httpErr.Detail)
} else {
log.Infof("%s: %s: %v", httpErr.ErrorCode().Error(), httpErr.Message, httpErr.Detail)
}
}
e := errcode.ServeJSON(w, err)
if e != nil {
log.Error(e)
}
return
}
func checkChangefeedInputs(logger ctxu.Logger, s interface{}, r string) (
store storage.MetaStore, pageSize int64, err error) {
store, ok := s.(storage.MetaStore)
if !ok {
logger.Errorf("%d GET unable to retrieve storage", http.StatusInternalServerError)
err = errors.ErrNoStorage.WithDetail(nil)
return
}
pageSize, err = strconv.ParseInt(r, 10, 32)
if err != nil {
logger.Errorf("%d GET invalid pageSize: %s", http.StatusBadRequest, r)
err = errors.ErrInvalidParams.WithDetail(
fmt.Sprintf("invalid records parameter: %s", err.Error()),
)
return
}
if pageSize == 0 {
pageSize = notary.DefaultPageSize
}
return
}