Nginx 作为 WebSockets 代理

location /wsapp/ {
    proxy_pass http://wsbackend;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
}

nginx 加上这个三个配置

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;

proxy_set_header Connection "upgrade";