// 引入 axios
import axios from 'axios';
// 請(qǐng)求配置單獨(dú)寫一個(gè)文件 baseurl.js
import serverConfig from './baseurl.js'

const serviceAxios = axios.creat({
	baseURL: serverConfig.baseURL, //基礎(chǔ)請(qǐng)求地址
    timeout: 1000 , //請(qǐng)求超時(shí)設(shè)置
    withCredentials: false, // 跨域請(qǐng)求是否需要攜帶 cookie 
})

serviceAxios.interceptors.request.use(
    (config) => {
        console.log("請(qǐng)求配置", config);
        // 是否使用 Token, 
        if(serverConfig.useTokenAuthorization) {
            config.headers["Authorization"] = localStorage.getItem("token");
        }
        // 設(shè)置請(qǐng)求頭
        if(config.method === "post") {
            config.headers["content-type"] = "application/x-ww-form-urlencoded";
            // config.data = qs.stringify(config.data); //序列化  效果等同于下行代碼
            config.requestType = "form"
        } else {
            config.headers["content-type"] = "application/json"
        }
        // 返回
        return config
    },
    (error) => {
        Promise.reject(error)
    }
)

serviceAxios.interceptors.response.use(
    (res) => {
        console.log("響應(yīng)攔截", res);
        let data = res.data;
        // 處理自己的業(yè)務(wù)邏輯,如 token 是否過期...
        return data;
    },
    (error) => {
        let message = ""
        if(error && error.response) {
            switch (error.response.status) {
                case 302: 
                    message = "接口重定向了! ";
                    break;
                case 400:
                    message = "參數(shù)不正確! ";
                    break;
                case 401:
                    message = "您未登錄, 或者登錄已經(jīng)超時(shí), 請(qǐng)先登錄! "
                    break;
                case 403:
                    message = "您還沒有權(quán)限操作! ";
                    break;
                case 404:
                    message = `請(qǐng)求地址出錯(cuò): ${error.response.config.url}`;
                    break;
                case 408:
                    message = "請(qǐng)求超時(shí)! ";
                    break;
                case 409:
                    message = "系統(tǒng)已存在相同數(shù)據(jù)! "
                    break;
                case 500:
                    message = "服務(wù)器內(nèi)部錯(cuò)誤! "
                    break;
                case 501:
                    message = "服務(wù)未實(shí)現(xiàn)! "
                    break;
                case 502:
                    message = "回答錯(cuò)誤! "
                    break;
                case 503:
                    message = "服務(wù)不可用"
                    break;
                case 504:
                    message = "服務(wù)暫時(shí)無法訪問, 請(qǐng)稍后再試"
                    break;
                case 505:
                    message = "HTTP 版本不受支持! "
                    break;
                default:
                    message = "異常問題, 請(qǐng)聯(lián)系管理員! "
                    break;
            }
        }
        return Promise.reject(message);
    }
);

import qs from 'qs'
function regsoleKey(config){
    const {method, url, params, data } = config;
    return [method, url, qs.stringify(params), qs.stringify(data)].join('&')
}

const reqQueue = new Map();
function addreqQueue(config){
    //調(diào)用生成唯一標(biāo)識(shí)值函數(shù), 生成 requestKey
    const requestKey = regsoleKey(config);
    //為每個(gè)請(qǐng)求創(chuàng)建一個(gè)專屬的 CancelToken(用于取消請(qǐng)求)
    config.cancelToken = config.cancelToken || new axios.CancelToken((cancel)=>{
        // 判斷 reqQueue 中是否含有 requestKey, 
        // 將 requestKey 與 CancelToken 以鍵值對(duì)的形式保存到map對(duì)象中
        if(!reqQueue.has(requestKey)){
            reqQueue.set(requestKey,cancel)
        }
    });
}

function removereqQueue(config){
    // 標(biāo)識(shí)值
    const requestKey = generateReqKey(config);
    
    if(reqQueue.has(requestKey)){
        // 取消之前發(fā)出請(qǐng)求
       const cancelToken = reqQueue.get(requestKey);
       cancelToken(requestKey);
        // 從隊(duì)列移除
       reqQueue.delete(requestKey);
    }
}

serviceAxios.interceptors.request.use(
	function(config) {
		removereqQueue(config); // 檢查是否重復(fù)發(fā)送請(qǐng)求
		addreqQueue(config); //將本次請(qǐng)求加入請(qǐng)求隊(duì)列
		return config
	},
	(error) => {
		return Promise.reject(error)
	}
)

serviceAxios.interceptors.response.use(
	(res) => {
		removereqQueue(res.config); //請(qǐng)求從請(qǐng)求隊(duì)列移除
		return res
	},
	(error) => {
		removereqQueue(error.config || {}); //請(qǐng)求從請(qǐng)求隊(duì)列移除
		//....
	}
)

// 最后
export default serviceAxios

const serverConfig = {
    baseURL: 'https://fm-emo-music-api.vercel.app',
    useTokenAuthorization: true, //是否開啟 token 驗(yàn)證
}
export default serverConfig

// 引入index.js
import serviceAxios from './index.js'

// get實(shí)例
export const VideoRecommendLike = (params) => {
    return serviceAxios({
        method: "get",
        url: "/dj/personalize/recommend",
        params,
    })
}
// post實(shí)例
export const ConfirmPhone = (data) =>{
    return serviceAxios({
        method: "post",
        url: "/captcha/sent",
        data,
    })
}

    <!-- axios請(qǐng)求文件 -->
    <script src="/src/utils/axios.js"></script>

import {useRouter} from '../../router/app.js'

  // 按需引入請(qǐng)求接口
    import {emailCounts} from "@/api/api.js"
    export default {
    	...
    	// 異步進(jìn)行axios請(qǐng)求
    	methods: {
    		async comein(){
    			let res = await emailCount(params)
    			console.log(res)
    		}
		}
    }