nginx解决egg-socket.io中wss(https)问

egg-socked.io客户端访问服务端时，会在端口号或ip后增加：
socket.io/?EIO=3&transport=polling字样，
服务器ip绑定的域名如果分配给了多个服务去使用，那么通过访问路径去配置egg-socket.io访问设置，多半不会成功，起码我没有成功。我解决egg-socket.io中wss访问失败方法如下

1、为egg-socket.io重新申请了一个二级域名

2、申请ssl证书

3、配置nginx

    server {
        #SSL 访问端口号为 443
        listen 443 ssl; 
        #填写绑定证书的域名
        server_name xxx.xxx.xxx; 
        #ssl on;
        #证书文件名称
        ssl_certificate  /etc/nginx/cpem/7094410_xxx.xxx.xxx.pem;
        #私钥文件名称
        ssl_certificate_key  /etc/nginx/cpem/7094410_xxx.xxx.xxxkey; 
        ssl_session_timeout 5m;
        #请按照以下协议配置
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2 SSLv2 SSLv3; 
        #请按照以下套件配置，配置加密套件，写法遵循 openssl 标准。
        ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
        ssl_prefer_server_ciphers on;
        ssl_verify_client off;

        location/{      
            proxy_pass http://wssapi;      # 转发
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
    upstream wssapi { //与server同级
        server 127.0.0.1:7161;
    }
    server{
        listen       80;
        server_name  xxx.xxx.xxx;
        location/{
            proxy_pass http://127.0.0.1:7161;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
        }
    }

4、所有关于egg-socket.io的服务都切成新配置的域名访问