@ylz/plugins/lib/file-download.umd.js

ylz plugins

/* * Copyright © 2019-2019 chenwenbin * Released under the MIT License. */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = global || self, global['file-download'] = factory());
}(this, function () { 'use strict';

  /**
   * 根据后台接口文件流下载
   * @param {*} data
   * @param {*} filename
   * @param {*} mime
   * @param {*} bom
   */
  var downloadByData = function downloadByData(data, filename, mime, bom) {
    var blobData = typeof bom !== 'undefined' ? [bom, data] : [data];
    var blob = new Blob(blobData, {
      type: mime || 'application/octet-stream'
    });

    if (typeof window.navigator.msSaveBlob !== 'undefined') {
      window.navigator.msSaveBlob(blob, filename);
    } else {
      var blobURL = window.URL.createObjectURL(blob);
      var tempLink = document.createElement('a');
      tempLink.style.display = 'none';
      tempLink.href = blobURL;
      tempLink.setAttribute('download', filename);

      if (typeof tempLink.download === 'undefined') {
        tempLink.setAttribute('target', '_blank');
      }

      document.body.appendChild(tempLink);
      tempLink.click();
      document.body.removeChild(tempLink);
      window.URL.revokeObjectURL(blobURL);
    }
  };
  /**
   * 根据文件地址下载文件
   * @param {*} sUrl
   */


  var downloadByUrl = function downloadByUrl(sUrl) {
    var target = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '_self';
    var isChrome = window.navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
    var isSafari = window.navigator.userAgent.toLowerCase().indexOf('safari') > -1;

    if (/(iP)/g.test(window.navigator.userAgent)) {
      console.error('您的浏览器不支持下载!');
      return false;
    }

    if (isChrome || isSafari) {
      var link = document.createElement('a');
      link.href = sUrl;
      link.target = target;

      if (link.download !== undefined) {
        var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
        link.download = fileName;
      }

      if (document.createEvent) {
        var e = document.createEvent('MouseEvents');
        e.initEvent('click', true, true);
        link.dispatchEvent(e);
        return true;
      }
    }

    if (sUrl.indexOf('?') === -1) {
      sUrl += '?download';
    }

    window.open(sUrl, target);
    return true;
  };

  var index = {
    downloadByData: downloadByData,
    downloadByUrl: downloadByUrl
  };

  return index;

}));