cnetong-core-frontend/base/libs/Util.js

## 1. 开始使用 ```js // 在npm项目中的main.js文件中加入以下代码 import Base from "cnetong-core-frontend";

import querystring from "querystring";
import moment from "moment";

//  文件下载
const downFileIframe = function (url, params) {
  const id = "iframe_to_download_file_hidden" + new Date().getTime();
  let fullURL = url + "?" + querystring.stringify(params);
  let iframe = document.getElementById(id);
  if (iframe === null) {
    iframe = document.createElement("iframe");
  }
  iframe.id = id;
  iframe.src = fullURL;
  iframe.style.display = 'none';
  document.body.appendChild(iframe);
  iframe.onload = () => {
    document.body.removeChild(iframe);
  };
};

/**
 * post方法下载
 * @param url 下载地址
 * @param params 参数
 */
const downFilePost = function (url, params) {
  const id = "iframe_to_download_file_hidden" + new Date().getTime();
  let iframe = document.createElement("iframe");
  iframe.id = id;
  iframe.name = id;
  iframe.style.display = 'none';
  document.body.appendChild(iframe);


  let turnForm = document.createElement("form");
  //一定要加入到body中！！
  document.body.appendChild(turnForm);
  turnForm.method = 'post';
  turnForm.action = url;
  turnForm.target = iframe.name;

  for (let name in params) {
    if (params.hasOwnProperty(name)) {
      let value = params[name];
      let newElement = document.createElement("input");
      newElement.setAttribute("name", name);
      newElement.setAttribute("type", "hidden");
      newElement.setAttribute("value", value);
      turnForm.appendChild(newElement);
    }
  }
  iframe.onload = () => {
    document.body.removeChild(iframe);
    document.body.removeChild(turnForm);
  };
  turnForm.submit();
};

/**
 * 数据安全处理
 */
const safety = {
  // 防止非法数据
  safeData(data) {
    if (typeof data !== "object") {
      return;
    }

    if (data) {
      //  过滤非法数据
      // delete data.opDesc;
      delete data.opUuid;
      delete data.crUserUuid;
      delete data.crTime;
      delete data.opUserUuid;
      delete data.opUserName;
      delete data.opUserName;
      delete data.opTime;

      for (let key in data) {
        if (data.hasOwnProperty(key)) {
          //  字符串去掉空白
          if (typeof data[key] === "string") {
            data[key] = data[key].trim();
          }

          //  过滤 空字符串 和null 不传递
          if (key === "uuid") {
            // uuid不能穿 空白等
            if (
              data[key] === "" ||
              data[key] == null ||
              data[key] === undefined
            ) {
              delete data[key];
            }
          }

          // 处理日期类型
          if (moment.isDate(data[key])) {
            data[key] = moment(data[key]).format("x");
          }
        }
      }
    }
    return data;
  },
  // 递归预处理数据提交
  preSubmit(data) {
    this.safeData(data);
    for (let key in data) {
      if (data.hasOwnProperty(key)) {
        if (typeof data[key] === "object") {
          data[key] = this.preSubmit(data[key]);
        }
      }
    }
    return data;
  }
};

export default {downFileIframe, downFilePost, safety};