luci/modules/admin-full/luasrc/view/admin_status/connections.htm

<%#
LuCI - Lua Configuration Interface
Copyright 2010 Jo-Philipp Wich <xm@subsignal.org>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

$Id$

-%>

<%+header%>

<script type="text/javascript" src="<%=resource%>/cbi.js"></script>
<script type="text/javascript">//<![CDATA[
	var bwxhr = new XHR();

	var G;
	var TIME = 0;
	var UDP  = 1;
	var TCP  = 2;

	var width  = 760;
	var height = 300;
	var step   = 5;

	var data_wanted = Math.floor(width / step);
	var data_fill   = 0;
	var data_stamp  = 0;

	var data_udp = [ ];
	var data_tcp = [ ];

	var line_udp;
	var line_tcp;

	var label_25;
	var label_50;
	var label_75;

	var label_rx_cur;
	var label_rx_avg;
	var label_rx_peak;

	var label_tx_cur;
	var label_tx_avg;
	var label_tx_peak;

	var label_scale;


	function update_graph()
	{
		bwxhr.get('<%=build_url("admin/status/connections_status")%>', null,
			function(x, data)
			{
				var data_max   = 0;
				var data_scale = 0;

				var data_udp_avg = 0;
				var data_tcp_avg = 0;

				var data_udp_peak = 0;
				var data_tcp_peak = 0;

				for (var i = data_stamp ? 0 : 1; i < data.length; i++)
				{
					/* skip overlapping entries */
					if (data[i][TIME] <= data_stamp)
						continue;

					data_udp.push(data[i][UDP]);
					data_tcp.push(data[i][TCP]);
				}

				/* cut off outdated entries */
				data_udp = data_udp.slice(data_udp.length - data_wanted, data_udp.length);
				data_tcp = data_tcp.slice(data_tcp.length - data_wanted, data_tcp.length);

				/* find peak */
				for (var i = 0; i < data_udp.length; i++)
				{
					data_max = Math.max(data_max, data_udp[i]);
					data_max = Math.max(data_max, data_tcp[i]);

					data_udp_peak = Math.max(data_udp_peak, data_udp[i]);
					data_tcp_peak = Math.max(data_tcp_peak, data_tcp[i]);

					if (i > 0)
					{
						data_udp_avg = (data_udp_avg + data_udp[i]) / 2;
						data_tcp_avg = (data_tcp_avg + data_tcp[i]) / 2;
					}
					else
					{
						data_udp_avg = data_udp[i];
						data_tcp_avg = data_tcp[i];
					}
				}

				/* remember current timestamp, calculate horizontal scale */
				data_stamp = data[data.length-1][TIME];
				data_scale = height / (data_max * 1.1);


				/* plot data */
				var pt_rx = '0,' + height;
				var pt_tx = '0,' + height;

				var y_rx = 0;
				var y_tx = 0;

				for (var i = 0; i < data_udp.length; i++)
				{
					var x = i * step;

					y_rx = height - Math.floor(data_udp[i] * data_scale);
					y_tx = height - Math.floor(data_tcp[i] * data_scale);

					pt_rx += ' ' + x + ',' + y_rx;
					pt_tx += ' ' + x + ',' + y_tx;
				}

				pt_rx += ' ' + width + ',' + y_rx + ' ' + width + ',' + height;
				pt_tx += ' ' + width + ',' + y_tx + ' ' + width + ',' + height;


				line_udp.setAttribute('points', pt_rx);
				line_tcp.setAttribute('points', pt_tx);

				label_25.firstChild.data = Math.floor(1.1 * 0.25 * data_max);
				label_50.firstChild.data = Math.floor(1.1 * 0.50 * data_max);
				label_75.firstChild.data = Math.floor(1.1 * 0.75 * data_max);

				label_rx_cur.innerHTML = Math.floor(data_udp[data_udp.length-1]);
				label_tx_cur.innerHTML = Math.floor(data_tcp[data_tcp.length-1]);

				label_rx_avg.innerHTML = Math.floor(data_udp_avg);
				label_tx_avg.innerHTML = Math.floor(data_tcp_avg);

				label_rx_peak.innerHTML = Math.floor(data_udp_peak);
				label_tx_peak.innerHTML = Math.floor(data_tcp_peak);

				/* reset timer */
				window.setTimeout(update_graph, 1000);
			}
		)
	}

	/* wait for SVG */
	window.setTimeout(
		function() {
			var svg = document.getElementById('bwsvg');
			
			try {
				G = svg.getSVGDocument
					? svg.getSVGDocument() : svg.contentDocument;
			}
			catch(e) {
				G = document.embeds['bwsvg'].getSVGDocument();
			}

			if (!G)
			{
				window.setTimeout(arguments.callee, 1000);
			}
			else
			{
				/* find sizes */
				width       = svg.offsetWidth  - 2;
				height      = svg.offsetHeight - 2;
				data_wanted = Math.ceil(width / step);

				/* prefill datasets */
				for (var i = 0; i < data_wanted; i++)
				{
					data_udp[i] = 0;
					data_tcp[i] = 0;
				}

				/* find svg elements */
				line_udp = G.getElementById('udp');
				line_tcp = G.getElementById('tcp');

				label_25 = G.getElementById('label_25');
				label_50 = G.getElementById('label_50');
				label_75 = G.getElementById('label_75');

				label_rx_cur  = document.getElementById('lb_udp_cur');
				label_rx_avg  = document.getElementById('lb_udp_avg');
				label_rx_peak = document.getElementById('lb_udp_peak');

				label_tx_cur  = document.getElementById('lb_tcp_cur');
				label_tx_avg  = document.getElementById('lb_tcp_avg');
				label_tx_peak = document.getElementById('lb_tcp_peak');

				label_scale   = document.getElementById('scale');


				/* plot horizontal time interval lines */
				for (var i = step * 60; i < width; i += step * 60)
				{
					var line = G.createElementNS('http://www.w3.org/2000/svg', 'line');
						line.setAttribute('x1', i);
						line.setAttribute('y1', 0);
						line.setAttribute('x2', i);
						line.setAttribute('y2', '100%');
						line.setAttribute('style', 'stroke:black;stroke-width:0.1');

					var text = G.createElementNS('http://www.w3.org/2000/svg', 'text');
						text.setAttribute('x', i + 5);
						text.setAttribute('y', 15);
						text.setAttribute('style', 'fill:#999999; font-size:9pt');
						text.appendChild(G.createTextNode(Math.round(i / step / 60) + 'm'));

					label_25.parentNode.appendChild(line);
					label_25.parentNode.appendChild(text);
				}

				label_scale.innerHTML = String.format('<%:(%d minute window, %d second interval)%>', data_wanted / 60, 1);

				/* render datasets, start update interval */
				update_graph();
			}
		}, 1000
	);
//]]></script>

<h2><a id="content" name="content"><%:Realtime Connections%></a></h2>

<embed id="bwsvg" style="width:100%; height:300px; border:1px solid #000000; background-color:#FFFFFF" src="<%=resource%>/connections.svg" />
<div style="text-align:right"><small id="scale">-</small></div>
<br />

<table style="width:100%; table-layout:fixed" cellspacing="5">
	<tr>
		<td style="text-align:right; vertical-align:top"><strong style="border-bottom:2px solid blue"><%:UDP:%></strong></td>
		<td id="lb_udp_cur">0</td>

		<td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
		<td id="lb_udp_avg">0</td>

		<td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
		<td id="lb_udp_peak">0</td>
	</tr>
	<tr>
		<td style="text-align:right; vertical-align:top"><strong style="border-bottom:2px solid green"><%:TCP:%></strong></td>
		<td id="lb_tcp_cur">0</td>

		<td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
		<td id="lb_tcp_avg">0</td>

		<td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
		<td id="lb_tcp_peak">0</td>
	</tr>
</table>

<%+footer%>