[nginx]配置nginx支持websocket解决返回400错误问题

当nginx里没有配置支持webocket时 , 但是已经配置了域名 比如:ws://gofly.sopans.com/ws_visitor 

直接js连会返回400的错误

需要在nginx  location 块下增加这三个header头 , 把http连接升级为websocket连接

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

比如我的开源客服gofly中

server{
       listen 80;
        server_name  gofly.sopans.com;
        access_log  /var/log/nginx/gofly.sopans.com.access.log  main;
        client_max_body_size 10M;
        location /static {
                root /var/www/html/go-fly;
        } 
        location / {
                proxy_pass http://127.0.0.1:8081;
                    proxy_http_version 1.1;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header Upgrade $http_upgrade;
                    proxy_set_header Connection "upgrade";
        }
}