1. (function ($, DX) {
       var dbImpl = {
          url: 'http://master/umbrellamobileservice/product/04',
           _sendRequest: function (type, params) {
               var deferred = new $.Deferred();
               var requestSettings = {
                   url: $.trim(dbImpl.url),
                   type: 'GET',
                //   crossDomain: true,
                     contentType: "application/json; charset=utf-8",
                                
                //   dataType: 'jsonp',
               //    async: false,
                   jsonpcallback: 'Error',
   
                   success: function (data) {
                       //Is it binary Type?????
                       var content_type =  xml_http_request.getResponseHeader('Content-Type');
   
                       if (content_type == "application/octet-stream" )
                       {
                      //     document.write(result);     
                       
                           alert('successful..');
   
                           var blob = new Blob([requestSettings.data]);
                           var link = document.createElement('a');
                           link.href = window.URL.createObjectURL(blob);
                           link.download = "myFileName.txt";
                           link.click();
   
                           }
                       else
                       {
                           //
                           alert('nope...');
                       }
                     
   
                   
                   },
                   error: function (jqXHR, textStatus, errorThrown) {
                       alert('Error Message: ' + textStatus);
                       alert('HTTP Error: ' + errorThrown);
                   }
   
               };
               if (params) {
                   if (type == 'DELETE') {
                       if (requestSettings.url[requestSettings.url.length - 1] != '/')
                           requestSettings.url += '/';
                       requestSettings.url += params.toString();
                   }
                   else
                       requestSettings.data = params;
               }
               $.ajax(requestSettings);
               return deferred;
           },
           load: function (loadOptions) {
   
   
               if (loadOptions.refresh) {
                   return dbImpl._sendRequest('GET');
               }
           },
           insert: function (params) {
               return dbImpl._sendRequest('POST', params);
           },
           update: function (params) {
               return dbImpl._sendRequest('PUT', params);
           },
           remove: function (params) {
               return dbImpl._sendRequest('DELETE', params);
           }
       };
       Restful_Ex_3.db = new DevExpress.data.CustomStore(dbImpl);
   })(jQuery, DevExpress);

this is my home.js file :

1. Restful_Ex_3.home = function (params) {
   
       var viewModel = {
           jsonp: true,
           dSource: new DevExpress.data.DataSource(Restful_Ex_3.db), //
       };
   
       return viewModel;
   };

and this is my home.dxview file :

1. <div data-options="dxView : { name: 'home', title: 'Home' } ">
      <div class="home-view" data-options="dxContent : { targetPlaceholder: 'content' } ">
   
   <div data-bind="dxList: { dataSource: dSource }">
              <div data-options="dxTemplate : { name: 'product' } " >
                  <span data-bind="text: product"></span>
                <!--  <span data-bind="text: Description"></span> -->
                  <div data-bind="dxButton: {text: 'Edit', clickAction: function(e) { $root.btnEditClick($data.code, $data.product); }}"></div>
                  <div data-bind="dxButton: {text: 'Delete', clickAction: function(e) { $root.btnDeleteClick($data.code);}}"></div>
              </div>
   
          <div data-bind="dxTextBox: {dataSource: dSource }">
           <span data-bind="text: product"></span>
          </div>
   
      </div>
   </div>

I need to take the response from the service and populate a listbox ( or anything at this stage ) with the resulting data. I assume the problem is with the service sending me back an octet-stream, which I need to convert into a usable format.

Can anyone help, please? I am quite new to JSON, but I want to learn