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import axios from "axios";
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class Request {
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// axios 实例
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instance;
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// 拦截器对象
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interceptorsObj;
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// * 存放取消请求控制器Map
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abortControllerMap;
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constructor(config) {
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this.instance = axios.create(config);
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// * 初始化存放取消请求控制器Map
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this.abortControllerMap = new Map();
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this.interceptorsObj = config.interceptors;
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// 拦截器执行顺序 接口请求 -> 实例请求 -> 全局请求 -> 实例响应 -> 全局响应 -> 接口响应
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this.instance.interceptors.request.use(
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(res) => {
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const controller = new AbortController();
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const url = res.url || "";
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res.signal = controller.signal;
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this.abortControllerMap.set(url, controller);
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return res;
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},
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(err) => err
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);
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// 使用实例拦截器
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this.instance.interceptors.request.use(
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this.interceptorsObj?.requestInterceptors,
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this.interceptorsObj?.requestInterceptorsCatch
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);
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this.instance.interceptors.response.use(
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this.interceptorsObj?.responseInterceptors,
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this.interceptorsObj?.responseInterceptorsCatch
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);
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// 全局响应拦截器保证最后执行
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this.instance.interceptors.response.use(
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// 因为我们接口的数据都在res.data下，所以我们直接返回res.data
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(res) => {
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const url = res.config.url || "";
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this.abortControllerMap.delete(url);
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return res.data;
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},
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(err) => err
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);
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}
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request(config) {
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return new Promise((resolve, reject) => {
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// 如果我们为单个请求设置拦截器，这里使用单个请求的拦截器
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if (config.interceptors?.requestInterceptors) {
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config = config.interceptors.requestInterceptors(config);
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}
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this.instance
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.request(config)
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.then((res) => {
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// 如果我们为单个响应设置拦截器，这里使用单个响应的拦截器
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if (config.interceptors?.responseInterceptors) {
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res = config.interceptors.responseInterceptors(res);
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}
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resolve(res);
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})
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.catch((err) => {
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reject(err);
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});
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// .finally(() => {})
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});
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}
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/**
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* 取消全部请求
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*/
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cancelAllRequest() {
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for (const [, controller] of this.abortControllerMap) {
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controller.abort();
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}
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this.abortControllerMap.clear();
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}
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/**
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* 取消指定的请求
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* @param url 待取消的请求URL
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*/
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cancelRequest(url) {
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const urlList = Array.isArray(url) ? url : [url];
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for (const _url of urlList) {
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this.abortControllerMap.get(_url)?.abort();
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this.abortControllerMap.delete(_url);
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}
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}
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}
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export default Request;
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