import { Method } from '../types/index';
/**
 *
 *
 * @export
 * @param {*} headers
 * @param {*} data
 * @returns {*}
 * @description 为 header 设置 content-type 头
 */
export declare function handleHeaders(headers: any, data: any): any;
/**
 *
 *
 * @export
 * @param {string} headers
 * @returns {*}
 * @description
 * 将 header 属性中的字符串
 * 'date: Fri, 05 Apr 2019 12:40:49 GMT
 *  etag: W/"d-Ssxx4FRxEutDLwo2+xkkxKc4y0k"
 * 转变成
 * {
 *  date: Fri, 05 Apr 2019 12:40:49 GMT
 *  etag: W/"d-Ssxx4FRxEutDLwo2+xkkxKc4y0k"
 * }
 * 对象
 */
export declare function parseHeaders(headers: string): any;
/**
 *
 *
 * @export
 * @param {*} headers
 * @param {Method} method
 * @returns {*}
 * @description
 * 主要将
 * headers: {
 *   common: {
 *     Accept: 'application/json, text/plain'
 *   },
 *   post: {
 *     'Content-Type':'application/x-www-form-urlencoded'
 *   }
 * }
 * flatten 成一层
 * headers: {
 *   Accept: 'application/json, text/plain'
 *   'Content-Type':'application/x-www-form-urlencoded'
 * }
 * common 中定义的 header 字段都要做提取值
 * 对于 post 之类的需要对请求的方法做判断提取值
 */
export declare function flattenHeaders(headers: any, method: Method): any;