angular-download-service.js

(function () {
  'use strict';

  var app = angular.module('angular.download.service', []);

  function FileDownload() {

    this.strMimeType = 'application/octet-stream;charset=utf-8';

    /**
     * @ngdoc function
     * @name setMimeType
     * @methodOf  angular.download.service:downloadService
     * @param {string} mimeType Mime type for the download
     * @description Sets mime type for current download
     *
     * Original function from: https://github.com/angular-ui/ng-grid/blob/master/src/features/exporter/js/exporter.js
     */
    this.setMimeType = function (mimeType) {
      this.strMimeType = mimeType;
    }

    /**
     * @ngdoc function
     * @name isIE
     * @methodOf  angular.download.service:downloadService
     * @description Checks whether current browser is IE and returns it's version if it is
     *
     * Original function from: https://github.com/angular-ui/ng-grid/blob/master/src/features/exporter/js/exporter.js
     */
    this.isIE = function () {
      var match = navigator.userAgent.match(/(?:MSIE |Trident\/.*; rv:)(\d+)/);
      return match ? parseInt(match[1]) : false;
    }

    /**
     * @ngdoc function
     * @name isSafari
     * @methodOf  angular.download.service:downloadService
     * @description Checks whether current browser is Safari and returns it's version if it is
     */
    this.isSafari = function () {
      var match = navigator.userAgent.match('(Version)/(\\d+)\\.(\\d+)(?:\\.(\\d+))?.*Safari/');
      return match ? parseInt(match[2]) : false;
    }

    /**
     * @ngdoc function
     * @name downloadFile
     * @methodOf  angular.download.service:downloadService
     * @param {string} fileName Name of the file that will be downloaded
     * @param {string} content Base64 encoded file content
     * @description Launch a file download witch specified filename and data
     *
     * Original function from: https://github.com/angular-ui/ng-grid/blob/master/src/features/exporter/js/exporter.js
     */
    this.downloadFile = function (fileName, content) {
      var D = document;
      var a = D.createElement('a');
      var rawFile;
      var ieVersion;

      ieVersion = this.isIE();
      if (ieVersion && ieVersion < 10) {
        var frame = D.createElement('iframe');
        document.body.appendChild(frame);

        frame.contentWindow.document.open("text/html", "replace");
        frame.contentWindow.document.write('sep=,\r\n' + content);
        frame.contentWindow.document.close();
        frame.contentWindow.focus();
        frame.contentWindow.document.execCommand('SaveAs', true, fileName);

        document.body.removeChild(frame);
        return true;
      }

      // IE10+
      if (navigator.msSaveBlob) {
        return navigator.msSaveBlob(
          new Blob([content], {
            type: this.strMimeType
          }),
          fileName
        );
      }

      //html5 A[download]
      if ('download' in a) {
        var blob = new Blob(
                    [content], {
            type: this.strMimeType
          }
        );
        rawFile = URL.createObjectURL(blob);
        a.setAttribute('download', fileName);
      } else {
        rawFile = 'data:' + this.strMimeType + ',' + encodeURIComponent(content);
        a.setAttribute('target', '_blank');
      }

      a.href = rawFile;
      a.setAttribute('style', 'display:none;');
      D.body.appendChild(a);
      setTimeout(function () {
        if (a.click) {
          a.click();
          // Workaround for Safari 5
        } else if (document.createEvent) {
          var eventObj = document.createEvent('MouseEvents');
          eventObj.initEvent('click', true, true);
          a.dispatchEvent(eventObj);
        }
        D.body.removeChild(a);
      }, this.delay);
    }
  }

  app.factory('fileDownloadService',
    function () {
      return new FileDownload();
    }
  );

})();