nginx转发websocket

例：

location /ray {
	if ($http_upgrade != "websocket") {
		return 404;
	}
	proxy_pass       http://127.0.0.1:35020;
	proxy_redirect             off;
	proxy_http_version         1.1;
	proxy_set_header Upgrade   $http_upgrade;
	proxy_set_header Connection "upgrade";
	proxy_set_header Host      $http_host;
	# Show real IP in v2ray access.log
	proxy_set_header X-Real-IP $remote_addr;
	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}