nginx配置webSocket转发

一、连接webSocket后台报Handshake failed due to invalid Upgrade header: null 解决方案

解决办法：在 nginx的location 中添加以下代码：

　proxy_set_header Upgrade $http_upgrade;
　proxy_set_header Connection  "upgrade";

　　例如：

location /strong_learning_police_czys_yanshi/ {
            proxy_pass http://192.168.0.247:6610/strong_learning_police_czys_yanshi/;
            proxy_set_header  Host  $host;
            proxy_set_header  X-Real-IP  $remote_addr;
            proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
            client_max_body_size 1000M;
            proxy_read_timeout 1800s;
	    proxy_http_version 1.1;
	    proxy_set_header Upgrade $http_upgrade;
	    proxy_set_header Connection "upgrade";
        }