使用Axios POST请求API遇ECONNREFUSED错误求助

问题描述 #

我的应用监听4000端口，尝试用axios.post连接5000端口的API地址localhost:5000/api/name/user/validate验证授权令牌，但出现连接80端口被拒绝的错误，API本身运行正常。

错误详情 #

AxiosError: connect ECONNREFUSED 127.0.0.1:80
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1187:16) {
port: 80,
address: '127.0.0.1',
syscall: 'connect',
code: 'ECONNREFUSED',
errno: -4078,
config: {
transitional: {
silentJSONParsing: true,
forcedJSONParsing: true,
clarifyTimeoutError: false
},
adapter: [Function: httpAdapter],
transformRequest: [ [Function: transformRequest] ],
transformResponse: [ [Function: transformResponse] ],
timeout: 0,
xsrfCookieName: 'XSRF-TOKEN',
xsrfHeaderName: 'X-XSRF-TOKEN',
maxContentLength: -1,
maxBodyLength: -1,
env: { FormData: [Function] },
validateStatus: [Function: validateStatus],
headers: {
Accept: 'application/json, text/plain, /',
'Content-Type': 'application/json',
'User-Agent': 'axios/0.27.2',
'Content-Length': 225
},
method: 'post',
url: 'http:localhost:5000/api/name/user/validate',
data: '{"proxy":false,"headers":{"Authorization":"Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2MzA0YmYxZmVhM2RiNDYyYjNhM2FiM2IiLCJpYXQiOjE2NjEyODA2MzksImV4cCI6MTY2MTg4NTQzOX0.ClIS6Z3iYAM1631f59Pgu6Gy1MfZFwnqMEk_IXheAzg"}}'
},
// 省略部分request详情
}

相关代码 #

const requireAuth = async (req, res, next) => {
    console.log(authorization);
    const config = {
        headers: {
          'Authorization':  authorization
        }
      }
    // 用认证服务器验证凭证
    try{
        axios.post('http:localhost:5000/api/name/user/validate', config)
        .then((response) => { 
            console.log(response);
            console.log("adssdasd");
            return next();
        })
        .catch((error) => {
            console.log(error);
        })
    } catch (error) {
        console.log(error);
        res.status(401).json({error: "请求未授权"});
    }
}

问题原因及修复方案 #

1. URL格式错误 #

错误日志里的url是http:localhost:5000/...，协议http:后面少了双斜杠//，导致Axios无法识别正确的主机和端口，默认走了80端口（HTTP默认端口）。

2. Axios.post参数顺序错误 #

axios.post的参数顺序是：url, data, config。你把headers配置当成了请求体data传进去，导致请求体变成了配置内容，同时没有正确设置请求头。

修复后的代码 #

const requireAuth = async (req, res, next) => {
    console.log(authorization);
    const config = {
        headers: {
          'Authorization': authorization
        }
    }
    try{
        // 修复URL格式，调整参数顺序：空对象作为请求体，第三个参数传配置
        const response = await axios.post('http://localhost:5000/api/name/user/validate', {}, config);
        console.log(response);
        console.log("adssdasd");
        next();
    } catch (error) {
        console.log(error);
        res.status(401).json({error: "请求未授权"});
    }
}

额外检查项 #

• 如果API不需要请求体，第二个参数传{}或null都可以
• 用curl http://localhost:5000/api/name/user/validate测试API是否真的能连通

内容的提问来源于stack exchange，提问作者Milosz