Ngnix Websocket 400 错误

Spring WebSocket 结合ngnix 之后400报错！

今天消息推送功能上测试服以后发现不能使用，到测试服上发现发送的请求一直返回400。后来定位到是ngnix配置问题。联系运维哥们将下面代码添加上以后成功解决:

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

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

添加好之后的样子

map $http_upgrade $connection_upgrade {
    default upgrade;
    ''  close;
}
server {
        ...
        location /chat/ {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
        }
}