格式化请求对象

  /**
   * 格式化请求对象
   * @param obj
   * @param skipEmpty 是否忽略空值
   * @param trim 如果是字符串，是否需要trim,默认执行
   */
  formatRequest(obj: object, skipEmpty: boolean= true, trim: boolean= true) {
    if (!obj) { return; }
    const resoult = {};
    Object.keys(obj).forEach(key => {
      if (obj[key] !== undefined && obj[key] !== null) {
        if (obj[key] === '') {
          if (!skipEmpty) { resoult[key] = ''; }
        } else if (obj[key] instanceof Array) {
          resoult[key] = obj[key].map(item => this.formatRequest(item));
          else if (obj[key] instanceof Object) {
          resoult[key] = this.formatRequest(obj[key]);
        } else {
          if (typeof obj[key] === 'string' && trim) {
            const trimedStr = (obj[key] as string).trim();
            if (trimedStr === '' && skipEmpty) {
              return;
            } else {
              obj[key] = trimedStr;
            }
          }
            resoult[key] = obj[key];
        }
      }
    });
    return resoult;
  }