Question

• （对象）

握手（handshake）细节：

{
  headers: /* the headers sent as part of the handshake */,
  time: /* the date of creation (as string) */,
  address: /* the ip of the client */,
  xdomain: /* whether the connection is cross-domain */,
  secure: /* whether the connection is secure */,
  issued: /* the date of creation (as unix timestamp) */,
  url: /* the request URL string */,
  query: /* the query object */
}

用例

io.use((socket, next) => {
  let handshake = socket.handshake;
  // ...
});

io.on('connection', (socket) => {
  let handshake = socket.handshake;
  // ...
});

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