Q1: 通过nginx部署vue工程时，Springboot使用webSocket（spring-boot-starter-websocket）造成经常连接失败的问题

A1：Nginx反向代理要支持WebSocket,需要配置几个header，否则连接时会报404

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 3600s;//这个时间不长的话就容易断开连接

Q2: 如何把系统变成使用SSL证书的访问协议https

A2: 需要按一下思路进行：（假定nginx网页和oss图片资源）

1. 申请与域名绑定的SSL证书
2. 然后下载SSL证书的nginx版本
3. 申请与oss绑定的SSL证书
4. oss端添加相关的域名记录
5. nginx配置修改：证书文件安装

nginx.conf

     http{
	server {
	    ###HTTPS的配置开始####
            listen 443 ssl;
            ssl_certificate /etc/nginx/cert/cert.pem;
            ssl_certificate_key /etc/nginx/cert/cert.key;
 
            ssl_session_timeout 5m;
            ssl_session_cache shared:SSL:50m;
            ssl_protocols SSLv3 SSLv2 TLSv1 TLSv1.1 TLSv1.2; #按照这个协议配置
            ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
            ssl_prefer_server_ciphers on;
        ###HTTPS的配置结束####
        }
      }

7. nginx中加入websocket的https版本 nginx.conf

http {
	map $http_upgrade $connection_upgrade {
	    default upgrade;
	    ''      close;
	}
    upstream wsbackend{ 
    		server ip:port; 
    		keepalive 1000; 
	}
  server {
	    location /wss  {   
                proxy_pass http://wsbackend;        #通过配置端口指向部署websocker的项目
                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";
                rewrite /wss/(.*) /$1 break;
                proxy_redirect off;
	     }
  }
}

8. web的websocket的连接代码如下：

wss://域名/wss/socket/message

WebSocketServer.java

@ServerEndpoint(value = "/socket/message/{id}",subprotocols = {"protocol"})