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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!--
Example HTML/javascript file that display the
header of a RRD archive files
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]
-->
<html>
<script type="text/javascript" src="../lib/binaryXHR.js"></script>
<script type="text/javascript" src="../lib/rrdFile.js"></script>
<head>
<title>RRD Header Info</title>
</head>
<body>
<h1 id="title">Javascript needed for this page to work</h1>
<script type="text/javascript">
document.getElementById("title").firstChild.data="RRD Header Info";
</script>
<label for="form_label_fname">RRD URL:</label>
<input type="text" id="input_fname" value="Test.rrd"
onchange="input_update()">
<button onclick="input_update()">Update</button>
<hr>
<table id="infotable" border=1>
<tr><th>RRD file</th><td id="fname" colspan="3">None</td></tr>
<tr><th>Step</th><td id="step">N/A</td><th>Last update</th><td id="last_update">N/A</td></tr>
</table>
<script type="text/javascript">
function write_failure() {
var pel=document.getElementById("hello");
pel.style.color='red';
pel.firstChild.data="Invalid RRD file.";
}
function update_info(fname,rrd_data) {
document.getElementById("fname").firstChild.data=fname;
document.getElementById("step").firstChild.data=rrd_data.getStep();
document.getElementById("last_update").firstChild.data=rrd_data.getLastUpdate();
var oTable=document.getElementById("infotable");
while (oTable.rows.length>=3) {
oTable.deleteRow(2);
}
var nrDSs=rrd_data.getNrDSs()
var oRow=oTable.insertRow(-1);
var oCell=oRow.insertCell(0);
oCell.innerHTML="<b>DS list</b>";
oCell.colSpan=4;
for (var i=0; i<nrDSs; i++) {
var oDS=rrd_data.getDS(i);
oRow=oTable.insertRow(-1);
oCell=oRow.insertCell(0)
oCell.innerHTML="<b>"+oDS.getName()+"</B>";
oCell=oRow.insertCell(1)
oCell.innerHTML=oDS.getType();
oCell.colSpan=3;
}
}
function update_info_handler(bf) {
var rrd_data=undefined;
try {
var rrd_data=new RRDFile(bf);
} catch(err) {
alert("File "+fname+" is not a valid RRD archive!");
}
if (rrd_data!=undefined) {
update_info(fname,rrd_data)
}
}
fname=document.getElementById("input_fname").value;
function input_update() {
fname=document.getElementById("input_fname").value;
try {
FetchBinaryURLAsync(fname,update_info_handler);
} catch (err) {
alert("Failed loading "+fname+"\n"+err);
}
}
//try {
// FetchBinaryURLAsync(fname,update_info_handler);
//} catch (err) {
// alert("Failed loading "+fname+"\n"+err);
//}
</script>
</body>
</html>
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