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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">RRD Header Info</h1>
RRD URL:
<input type="text" id="input_fname" value="example1.rrd"
onchange="input_update()">
<button onclick="input_update()">Update</button>
<hr>
<table id="infotable" border=1>
<tr><td colspan="5"><b>Javascript needed for this page to work</b></td></tr>
<tr><td><b>RRD file</b></td><td id="fname" colspan="4">None</td></tr>
<tr><td><b>Min Step</b></td><td id="step" align="right">N/A</td><td><b>Last update</b></td><td id="last_update" colspan="2">N/A</td></tr>
</table>
<script type="text/javascript">
// Remove the Javascript warning
document.getElementById("infotable").deleteRow(0);
// fname is the global variable used by all the functions below
fname=document.getElementById("input_fname").value;
// This function updates the Web Page with the data from the RRD archive
function update_info(fname,rrd_data) {
// cleanup
// rows may have been added during previous updates
var oTable=document.getElementById("infotable");
while (oTable.rows.length>=3) {
oTable.deleteRow(2);
}
// Generic header info
document.getElementById("fname").firstChild.data=fname;
document.getElementById("step").firstChild.data=rrd_data.getMinStep();
document.getElementById("last_update").firstChild.data=rrd_data.getLastUpdate();
// DS info
var nrDSs=rrd_data.getNrDSs()
var oRow=oTable.insertRow(-1);
var oCell=oRow.insertCell(0);
oCell.innerHTML="<b>DS list</b>";
oCell.colSpan=5;
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=4;
}
// RRA Info
var nrRRAs=rrd_data.getNrRRAs()
oRow=oTable.insertRow(-1);
oCell=oRow.insertCell(0);
oCell.innerHTML="<b>RRA list</b>";
oCell.colSpan=5;
for (var i=0; i<nrRRAs; i++) {
var oRRA=rrd_data.getRRAInfo(i);
oRow=oTable.insertRow(-1);
oCell=oRow.insertCell(0)
oCell.innerHTML=i;
oCell.align="center";
oCell=oRow.insertCell(1)
oCell.innerHTML="<b>Rows</b>";
oCell=oRow.insertCell(2)
oCell.innerHTML=oRRA.getNrRows();
oCell.align="right";
oCell=oRow.insertCell(3)
oCell.innerHTML="<b>Step</b>";
oCell=oRow.insertCell(4)
oCell.innerHTML=oRRA.getStep();
oCell.align="right";
}
}
// 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_info_handler(bf) {
var rrd_data=undefined;
if (bf.getLength()<1) {
alert("File "+fname+" is empty (possibly loading failed)!");
return 1;
}
try {
var rrd_data=new RRDFile(bf);
} catch(err) {
alert("File "+fname+" is not a valid RRD archive!\n"+err);
}
if (rrd_data!=undefined) {
update_info(fname,rrd_data)
}
}
// this function is invoked when the RRD file name changes
function input_update() {
fname=document.getElementById("input_fname").value;
try {
FetchBinaryURLAsync(fname,update_info_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_info_handler);
//} catch (err) {
// alert("Failed loading "+fname+"\n"+err);
//}
</script>
</body>
</html>
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