'headers' 事件

当接收到流的附加标头块时，例如接收到 1xx 信息标头块时，则会触发 'headers' 事件。 监听器回调传入 HTTP/2 标头对象和与标头关联的标志。

stream.on('headers', (headers, flags) => {
  console.log(headers);
});

The 'headers' event is emitted when an additional block of headers is received for a stream, such as when a block of 1xx informational headers is received. The listener callback is passed the HTTP/2 Headers Object and flags associated with the headers.

stream.on('headers', (headers, flags) => {
  console.log(headers);
});