在ECS上使用websocket，需要怎么配置nginx！

我现在的nginx配置是：

server {
    location ~ ^/push/ {
        ...
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;


        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";


        access_log /var/log/nginx/wspush/access.log;
        error_log /var/log/nginx/wspush/error.log;
    }


    location ~ ^/socket.io/ {
        ...

        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;


        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";


        access_log /var/log/nginx/wspush/access.log;
        error_log /var/log/nginx/wspush/error.log;
    }
}
但是socket.io会报：
warn: client not handshaken client should reconnect
并且一直重连，无法使用。。
求大牛解答！