vue cli代理运行在mac平台偶尔请求失败问题

1.问题
Proxy error: Could not proxy request /chart/update from xxx.xx.xx.xx:xxxx to http://xxx.xx.xx.xx:xxxx.
See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (ECONNRESET).

2.解决
vue.config.js:

const http = require('http')

    devServer: {
        proxy: {
            '/': {
                target: 'http://xxx.xx.xx.xx:xxxx,
                changeOrigin: true,
                ws: false,
                // 解决mac 代理失败问题
                headers: {
                    Connection: 'keep-alive'
                },
                agent: new http.Agent()
            }
        }
    },