    ## <DATASRC> ##

    location /data/hist.tsv {
        alias /tmp/stats.tsv;
    }

    location /data/stream.tsv { 
        alias /tmp/event.tsv;
    }

    location /data/stream.ws {
        proxy_http_version 1.1;
        proxy_set_header Upgrade         $http_upgrade;
        proxy_set_header Connection      "upgrade";

        proxy_set_header Host            $host; # $http_host;
        proxy_set_header X-Real-IP       $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-NginX-Proxy   true;

        proxy_read_timeout 3600;
        proxy_buffering off;
        tcp_nodelay on;

        error_page 502 = /data/stream.tsv; # serve http for non-ws clients

        proxy_pass http://127.0.0.1:5800/websockify;
    }

    ## </DATASRC> ##

