如下面我们抓到的这个:
缺少了关键的: Upgrade: websocket.
不知道这个是不是通过你们nginx的时候出的问题？ 还是说是用户网络比较复杂被过滤掉的?
这个不是每个人都有，少数人存在这个问题.
INFO 2016-04-24 18:54:38 { 'x-forwarded-proto': 'http',
INFO 2016-04-24 18:54:38 host: 'xxx.leanapp.cn',
INFO 2016-04-24 18:54:38 'x-real-ip': '112.21.166.68',
INFO 2016-04-24 18:54:38 connection: 'upgrade',
INFO 2016-04-24 18:54:38 'x-avoscloud-code-web-hosting': '1',
INFO 2016-04-24 18:54:38 'sec-websocket-key': 'iPSa/AypkstRAVe41dbEQ==',
INFO 2016-04-24 18:54:38 origin: 'http://xxx.leanapp.cn',
INFO 2016-04-24 18:54:38 'sec-websocket-protocol': 'default-protocol',
INFO 2016-04-24 18:54:38 'sec-websocket-extensions': 'x-webkit-deflate-frame,deflate-frame',
INFO 2016-04-24 18:54:38 'sec-websocket-version': '13',
INFO 2016-04-24 18:54:38 'cache-control': 'no-cache, max-age=259200',
INFO 2016-04-24 18:54:38 'x-forwarded-for': '::ffff:10.10.56.246',
INFO 2016-04-24 18:54:38 'x-forwarded-protocol': 'http',
INFO 2016-04-24 18:54:38 'x-forwarded-port': '80' }
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