webpack devServer代理打印日志

proxy: {
    '/api': {
      target: 'http://api.xxx.com',
      //去除api头，即去除context，不加pathRewrite，则不去除任何
      pathRewrite: {'^/api': ''},
      changeOrigin: true,
      logLevel: 'debug',
      onProxyReq: (proxyReq, req) => {
        // http请求
        console.log('[HPM] %s %s %s %s', req.method, req.originalUrl, '->', req.url);
      },
      onProxyReqWs(proxyReq, req, socket, options, head) {
        // websocket请求（单个TCP连接上进行全双工通信的协议）
        console.log('[HPM] %s %s %s %s', req.method, '-', req.url);
      }
    }
}