Added callback function
Added callback function

martinmr/node-ldp-httpd,timbl/ldnode,evWork/nds-server,martinmr/node-ldp-httpd,evWork/nds-server,nicola/ldnode,evWork/nds-server,linkeddata/ldnode,dmitrizagidulin/solid-server-unstable,dmitrizagidulin/solid-server-unstable,dmitrizagidulin/solid-server-unstable,deiu/ldnode,linkeddata/ldnode,nicola/ldnode,deiu/ldnode,timbl/ldnode