计算Angular JS中CSV的行数

Question

我有一个html form将该文件提交到angular js：

<form id="uploadForm">
   <div id="republishBulk" class="panel-collapse collapse desc vertical" style="display: none; text-align: left">
      <div class="horizontal">
         <div class="dropdown">
            <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" id="selectSource1" aria-haspopup="true" aria-expanded="true">
            Source system
            </button>
            <div class="dropdown-menu" aria-labelledby="dropdownMenu1">
               <h5 class="dropdown-header">Source system</h5>
               <a class="dropdown-item" href="#" data-value="s1">S1</a>
               <a class="dropdown-item" href="#" data-value="s2">S2</a>
               <a class="dropdown-item" href="#" data-value="s3">S3</a>
            </div>
         </div>
         <div class="col-md-7">
            <input id="upload" type="file" class="form-control" placeholder="Upload republish file" file-model="uploadedRepublishFile" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel"/>
         </div>
         <div class="form-group mb-3">
            <div class="form-group" aria-label="file upload">
               <input id="republish" type="submit" class="btn btn-primary"
                  ng-click="doRepublishFile()" value="Upload"/>
            </div>
         </div>
      </div>
   </div>
</form>

我的控制器将文件传递到我的spring controller的位置：

$scope.doRepublishFile = function() {
    var file = $scope.uploadedRepublishFile;
    var url = "/republishfile";

    var data = new FormData();
    data.append('republishfile', file);

    var config = {
        transformRequest: angular.identity,
        headers: {
            'Content-Type': undefined
        }
    }

    $http.post(url, data, config).then(
        function(response) {
            $rootScope.republishData = response.data;
        });
};

我可以计算angular js中文件的行数吗？

我需要显示一个alert box，该文件包含一个指定的行数，并带有一个OK和Cancel按钮。仅在选择OK时才应调用弹簧控制器。

任何帮助将不胜感激。