modules/admin-full: add SVG based realtime bandwidth status
[project/luci.git] / modules / admin-full / luasrc / view / admin_status / bandwidth.htm
diff --git a/modules/admin-full/luasrc/view/admin_status/bandwidth.htm b/modules/admin-full/luasrc/view/admin_status/bandwidth.htm
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+<%#
+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
+
+$Id$
+
+-%>
+
+<%-
+       local dev
+       local devices = { }
+       for _, dev in luci.util.kspairs(luci.sys.net.devices()) do
+               if dev ~= "lo" then
+                       devices[#devices+1] = dev
+               end
+       end
+
+       local curdev = luci.dispatcher.context.requestpath
+             curdev = curdev[#curdev] ~= "bandwidth" and curdev[#curdev] or devices[1]
+-%>
+
+<%+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 RXB  = 1;
+       var RXP  = 2;
+       var TXB  = 3;
+       var TXP  = 4;
+
+       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_rx = [ ];
+       var data_tx = [ ];
+
+       var line_rx;
+       var line_tx;
+
+       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 bandwidth_label(bytes, br)
+       {
+               var uby = 'KByte';
+               var kby = (bytes / 1024);
+
+               if (kby >= 1024)
+               {
+                       uby = 'MByte';
+                       kby = kby / 1024;
+               }
+
+               var ubi = 'KBit';
+               var kbi = (bytes * 8 / 1024);
+
+               if (kbi >= 1024)
+               {
+                       ubi = 'MBit';
+                       kbi = kbi / 1024;
+               }
+
+               return String.format("%f %s/s%s(%f %s/s)",
+                       kbi.toFixed(2), ubi,
+                       br ? '<br />' : ' ',
+                       kby.toFixed(2), uby
+               );
+       }
+
+       function update_graph()
+       {
+               bwxhr.get('<%=build_url("admin/status/bandwidth_status", curdev)%>', null,
+                       function(x, data)
+                       {
+                               var data_max   = 0;
+                               var data_scale = 0;
+
+                               var data_rx_avg = 0;
+                               var data_tx_avg = 0;
+
+                               var data_rx_peak = 0;
+                               var data_tx_peak = 0;
+
+                               for (var i = data_stamp ? 0 : 1; i < data.length; i++)
+                               {
+                                       /* skip overlapping entries */
+                                       if (data[i][TIME] <= data_stamp)
+                                               continue;
+
+                                       /* normalize difference against time interval */
+                                       var time_delta = data[i][TIME] - data[i-1][TIME];
+                                       if (time_delta)
+                                       {
+                                               data_rx.push((data[i][RXB] - data[i-1][RXB]) / time_delta);
+                                               data_tx.push((data[i][TXB] - data[i-1][TXB]) / time_delta);
+                                       }
+                               }
+
+                               /* cut off outdated entries */
+                               data_rx = data_rx.slice(data_rx.length - data_wanted, data_rx.length);
+                               data_tx = data_tx.slice(data_tx.length - data_wanted, data_tx.length);
+
+                               /* find peak */
+                               for (var i = 0; i < data_rx.length; i++)
+                               {
+                                       data_max = Math.max(data_max, data_rx[i]);
+                                       data_max = Math.max(data_max, data_tx[i]);
+
+                                       data_rx_peak = Math.max(data_rx_peak, data_rx[i]);
+                                       data_tx_peak = Math.max(data_tx_peak, data_tx[i]);
+
+                                       if (i > 0)
+                                       {
+                                               data_rx_avg = (data_rx_avg + data_rx[i]) / 2;
+                                               data_tx_avg = (data_tx_avg + data_tx[i]) / 2;
+                                       }
+                                       else
+                                       {
+                                               data_rx_avg = data_rx[i];
+                                               data_tx_avg = data_tx[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_rx.length; i++)
+                               {
+                                       var x = i * step;
+
+                                       y_rx = height - Math.floor(data_rx[i] * data_scale);
+                                       y_tx = height - Math.floor(data_tx[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_rx.setAttribute('points', pt_rx);
+                               line_tx.setAttribute('points', pt_tx);
+
+                               label_25.firstChild.data = bandwidth_label(1.1 * 0.25 * data_max);
+                               label_50.firstChild.data = bandwidth_label(1.1 * 0.50 * data_max);
+                               label_75.firstChild.data = bandwidth_label(1.1 * 0.75 * data_max);
+
+                               label_rx_cur.innerHTML = bandwidth_label(data_rx[data_rx.length-1], true);
+                               label_tx_cur.innerHTML = bandwidth_label(data_tx[data_tx.length-1], true);
+
+                               label_rx_avg.innerHTML = bandwidth_label(data_rx_avg, true);
+                               label_tx_avg.innerHTML = bandwidth_label(data_tx_avg, true);
+
+                               label_rx_peak.innerHTML = bandwidth_label(data_rx_peak, true);
+                               label_tx_peak.innerHTML = bandwidth_label(data_tx_peak, true);
+
+                               /* reset timer */
+                               window.setTimeout(update_graph, 1000);
+                       }
+               )
+       }
+
+       /* wait for SVG */
+       window.setTimeout(
+               function() {
+                       G = document.embeds["bwsvg"].getSVGDocument();
+
+                       if (!G)
+                       {
+                               window.setTimeout(arguments.callee, 1000);
+                       }
+                       else
+                       {
+                               /* find sizes */
+                               width       = document.embeds["bwsvg"].offsetWidth  - 2;
+                               height      = document.embeds["bwsvg"].offsetHeight - 2;
+                               data_wanted = Math.ceil(width / step);
+
+                               /* prefill datasets */
+                               for (var i = 0; i < data_wanted; i++)
+                               {
+                                       data_rx[i] = 0;
+                                       data_tx[i] = 0;
+                               }
+
+                               /* find svg elements */
+                               line_rx = G.getElementById('rx');
+                               line_tx = G.getElementById('tx');
+
+                               label_25 = G.getElementById('label_25');
+                               label_50 = G.getElementById('label_50');
+                               label_75 = G.getElementById('label_75');
+
+                               label_rx_cur  = document.getElementById('rx_bw_cur');
+                               label_rx_avg  = document.getElementById('rx_bw_avg');
+                               label_rx_peak = document.getElementById('rx_bw_peak');
+
+                               label_tx_cur  = document.getElementById('tx_bw_cur');
+                               label_tx_avg  = document.getElementById('tx_bw_avg');
+                               label_tx_peak = document.getElementById('tx_bw_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 Traffic%></a></h2>
+
+<ul class="cbi-tabmenu">
+       <% for _, dev in ipairs(devices) do %>
+               <li class="cbi-tab<%= dev == curdev and "" or "-disabled" %>"><a href="<%=pcdata(dev)%>"><%=pcdata(dev)%></a></li>
+       <% end %>
+</ul>
+
+<embed id="bwsvg" style="width:100%; height:300px; border:1px solid #000000; background-color:#FFFFFF" src="<%=resource%>/bandwidth.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"><%:Inbound:%></strong></td>
+               <td id="rx_bw_cur">0 kbit/s<br />(0 KB/s)</td>
+
+               <td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
+               <td id="rx_bw_avg">0 kbit/s<br />(0 KB/s)</td>
+
+               <td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
+               <td id="rx_bw_peak">0 kbit/s<br />(0 KB/s)</td>
+       </tr>
+       <tr>
+               <td style="text-align:right; vertical-align:top"><strong style="border-bottom:2px solid green"><%:Outbound:%></strong></td>
+               <td id="tx_bw_cur">0 kbit/s<br />(0 KB/s)</td>
+
+               <td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
+               <td id="tx_bw_avg">0 kbit/s<br />(0 KB/s)</td>
+
+               <td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
+               <td id="tx_bw_peak">0 kbit/s<br />(0 KB/s)</td>
+       </tr>
+</table>
+
+
+<pre id="debug"></pre>
+
+
+<%+footer%>