void rchvdwnld_page(void){
  const char *zUuid;
  char *zBase;
  int nUuid;
  int rid;
  login_check_credentials();
  if( !g.perm.Zip ){ login_needed(g.anon.Zip); return; }
  robot_restrict("zip");
  if( robot_restrict("zip") || robot_restrict("download") ) return;
  robot_restrict("download");

  zUuid = P("name");
  if( zUuid==0
   || (nUuid = (int)strlen(zUuid))<6
   || !validate16(zUuid,-1)
   || (rid = db_int(0, "SELECT rid FROM blob WHERE uuid GLOB '%q*'", zUuid))==0
   || !db_exists("SELECT 1 from event WHERE type='ci' AND objid=%d",rid)