no-socket

https://github.com/youzan/zan-proxy/blob/master/README.zh-CN.md

适用于 dva， umijs
修改前端启动命令 SOCKET_SERVER=none，关闭 socket server

"start": "cross-env APP_TYPE=site PORT=8899 SOCKET_SERVER=none umi dev",
"start:no-mock": "cross-env MOCK=none PORT=8899 SOCKET_SERVER=none umi dev",

• 解决报错：npm run start 之后页面一直提示 Disconnect 不断刷新重连
• 原因：同时起了 devServer 和 node 两个端口服务，当访问后端渲染页面时，umi 中的 socket server 端口指向错误。所以它会不断地重连

当 SOCKET_SERVER=none 时就不会走 socket server 这一段

// Connect to WebpackDevServer via a socket.
if (process.env.SOCKET_SERVER !== 'none') {
  socket(
    process.env.SOCKET_SERVER
      ? `${stripLastSlash(process.env.SOCKET_SERVER)}/sockjs-node`
      : url.format({
        protocol: window.location.protocol,
        hostname: window.location.hostname,
        port: window.location.port,
        // Hardcoded in WebpackDevServer
        pathname: '/sockjs-node',
      }),
    {
      onclose() {
        if (
          typeof console !== 'undefined' &&
          typeof console.info === 'function'
        ) {
          console.info(
            'The development server has disconnected.\nRefresh the page if necessary.',
          );
        }
      },
      onmessage(e) {
        var message = JSON.parse(e.data);
        switch (message.type) {
          case 'hash':
            handleAvailableHash(message.data);
            break;
          case 'still-ok':
          case 'ok':
            handleSuccess();
            break;
          case 'content-changed':
            // Triggered when a file from `contentBase` changed.
            window.location.reload();
            break;
          case 'warnings':
            handleWarnings(message.data);
            break;
          case 'errors':
            handleErrors(message.data);
            break;
          default:
          // Do nothing.
        }
      },
    },
  );
}