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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!--
Example HTML/javascript file that display the
content of a RRD archive file in a graph
using the Flot libraries
Part of the javascriptRRD package
Copyright (c) 2009 Frank Wuerthwein, fkw@ucsd.edu
Original repository: http://javascriptrrd.sourceforge.net/
MIT License [http://www.opensource.org/licenses/mit-license.php]
-->
<!--
This page requires Flot.
Repository: http://code.google.com/p/flot/
For this example we load the required scripts directly from their examples page.
Production web pages should download their copy and serve them locally.
-->
<html>
<script type="text/javascript" src="../lib/binaryXHR.js"></script>
<script type="text/javascript" src="../lib/rrdFile.js"></script>
<script type="text/javascript" src="../lib/rrdFlotSupport.js"></script>
<script type="text/javascript" src="../lib/rrdFlot.js"></script>
<!-- Using jFlot example URL... never do this on production pages -->
<script type="text/javascript" src="http://people.iola.dk/olau/flot/jquery.js"></script>
<script type="text/javascript" src="http://people.iola.dk/olau/flot/jquery.flot.js"></script>
<head>
<title>RRD Graphs with Flot</title>
</head>
<body>
<h1 id="title">RRD Graphs with Flot</h1>
RRD URL:
<input type="text" id="input_fname" value="example1.rrd"
onchange="fname_update()">
<button onclick="fname_update()">Update</button>
<hr>
<table id="infotable" border=1>
<tr><td colspan="21"><b>Javascript needed for this page to work</b></td></tr>
<tr><td><b>RRD file</b></td><td id="fname" colspan="5">None</td></tr>
</table>
<div id="mygraph"></div>
<script type="text/javascript">
// Remove the Javascript warning
document.getElementById("infotable").deleteRow(0);
// fname and rrd_data are the global variable used by all the functions below
fname=document.getElementById("input_fname").value;
rrd_data=undefined;
// This function updates the Web Page with the data from the RRD archive header
// when a new file is selected
function update_fname() {
// Update DS info
var nrDSs=rrd_data.getNrDSs()
// Finally, update the file name and enable the update button
document.getElementById("fname").firstChild.data=fname;
// the rrdFlot object creates and handles the graph
var f=new rrdFlot("mygraph",rrd_data);
}
// This is the callback function that,
// given a binary file object,
// verifies that it is a valid RRD archive
// and performs the update of the Web page
function update_fname_handler(bf) {
var i_rrd_data=undefined;
try {
var i_rrd_data=new RRDFile(bf);
} catch(err) {
alert("File "+fname+" is not a valid RRD archive!");
}
if (i_rrd_data!=undefined) {
rrd_data=i_rrd_data;
update_fname()
}
}
// this function is invoked when the RRD file name changes
function fname_update() {
fname=document.getElementById("input_fname").value;
try {
FetchBinaryURLAsync(fname,update_fname_handler);
} catch (err) {
alert("Failed loading "+fname+"\n"+err);
}
}
// Uncomment this part if you want the Web page to load the
// default RRD file at load time
//
//try {
// FetchBinaryURLAsync(fname,update_fname_handler);
//} catch (err) {
// alert("Failed loading "+fname+"\n"+err);
//}
</script>
</body>
</html>
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