Axios请求失败重试实现

代码实现

// request.ts

import axios, { AxiosRequestConfig } from "axios";

// 自定义ReuqestConfig
interface RetryConfg extends AxiosRequestConfig {
    retry: number,
    retryDelay: number,
    retryCount: number;
}

const defaultConfig: RetryConfg = {
    retry: 3,
    retryDelay: 3000,
    retryCount: 0
};

// 创建请求实例
const request = axios.create(defaultConfig);

// 响应拦截
request.interceptors.response.use(res => {
    return res;
}, err => {
    const config: RetryConfg = err.config;
    
    // 重试配置判断
    if (!config || !config.retry) {
        return Promise.reject(err);
    }
    
    // 重试次数判断
    config.retryCount = config.retryCount || 0;
    if (config.retryCount >= config.retry) {
        return Promise.reject(err);
    }
    
	if(err.response){
	    console.error("err => ",err.response.data)
	}else{
	    console.error("err ==> ",err)
	}
	
    // 次数自增
    config.retryCount++;
    
    // 重试
    return new Promise<void>((resolve) => {
        // 延迟
        setTimeout(() => {
            resolve();
        }, config.retryDelay || 0);
    }).then(() => {
        console.log(`retryCount ==> : ${config.retryCount}`);
        return request(config);
    });
});

export default request;

测试环境

// server.ts

import express from "express";

const app = express();

app.use(express.json());

app.post("/retry", (req, res) => {
    console.log(`Path: Path: ${req.path}`);
    return res.status(500)
        .json({
            code: 500,
            message: "error"
        });
});

const port = 3000;
app.listen(port, () => {
    console.log(`The service starts on port ${port}.`);
});

测试代码

// client.ts

import request, { RetryConfg } from "./request";

const config: RetryConfg = {
    retry: 3,
    retryDelay: 3000,
    url: "http://localhost:3000/retry",
    method: "post"
};

request(config)
    .then(res => {
        console.log('res ==> ', res.data);
    }).catch(err => {
        if (err.response) {
            console.log('err ==> ', err.response.data);
        } else {
            console.log('err ==> ', err.message);
        }
    });

测试结果

err ==>  { code: 500, message: 'error' }
retryCount: 1
err ==>  { code: 500, message: 'error' }
retryCount: 2
err ==>  { code: 500, message: 'error' }
retryCount: 3
err ==>  { code: 500, message: 'error' }

重试流程