# onHandShake
WebSocket建立连接后进行握手。WebSocket服务器已经内置了handshake，如果用户希望自己进行握手处理，可以设置onHandShake事件回调函数。
~~~
function onHandShake(swoole_http_request $request, swoole_http_response $response);
~~~
> 设置onHandShake回调函数后不会再触发onOpen事件，需要应用代码自行处理
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