Export only filtered records in jquery-datatables

I am using jquery-datatables in my application which displays over 1000 records. I am using the jQuery table-tools extension to display buttons to save format CVS

. If the user enters a keyword into the global filter and hits it CSV

, I want to export only the filtered rows. How would I do this using JQuery-datatables? I tried the following code but with no success. Please let me know where I am going wrong.

var table=$('#dataTable-state').dataTable({
                        "jQueryUI": true,
                        "dom": 'T<"clear">lfrtip',
                        "sPaginationType": "full_numbers",
                        "aaData": $scope.data,
                        "bFilter": true,
                        "oSearch": {"bRegex":true, "bSmart": false},
                        "aoColumns": [
                            { "mData": "name" },
                            { "mData": "age" },
                            { "mData": "city" },
                            { "mData": "state" }
                        ]
                    });
                  var tableTools = new $.fn.dataTable.TableTools( table);

                $( tableTools.fnContainer() ).insertAfter('div#dataTable-state_wrapper');