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view.html
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view.html
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<html>
<head>
<style type="text/css">
<!--
body {
font-family: Helvetica, Tahoma, Arial;
font-size: 12px;
}
#file_canvas {
display: block;
width: 100%;
height: 90%;
}
#text_frame {
font-size: 9px;
display: block;
width: 100%;
height: 100%;
border: 1px solid gray;
}
-->
</style>
<script>
function $(id) { return document.getElementById(id) };
// From: http://thomas.bindzus.me/2007/12/24/adding-dynamic-contents-to-iframes/
// Props to Thomas Bindzus
function IFrame(parentElement)
{
// Create the iframe which will be returned
var iframe = document.createElement("iframe");
// If no parent element is specified then use body as the parent element
if(parentElement == null)
parentElement = document.body;
// This is necessary in order to initialize the document inside the iframe
parentElement.appendChild(iframe);
// Initiate the iframe's document to null
iframe.doc = null;
// Depending on browser platform get the iframe's document, this is only
// available if the iframe has already been appended to an element which
// has been added to the document
if(iframe.contentDocument)
// Firefox, Opera
iframe.doc = iframe.contentDocument;
else if(iframe.contentWindow)
// Internet Explorer
iframe.doc = iframe.contentWindow.document;
else if(iframe.document)
// Others?
iframe.doc = iframe.document;
// If we did not succeed in finding the document then throw an exception
if(iframe.doc == null)
throw "Document not found, append the parent element to the DOM before creating the IFrame";
// Create the script inside the iframe's document which will call the
iframe.doc.open();
iframe.doc.close();
// Return the iframe, now with an extra property iframe.doc containing the
// iframe's document
return iframe;
}
// Initialize XMLHTTPRequest handle
var xmlhttp = false;
var running = false;
var current_line = 0;
var updateInterval = 1000;
var box_iframe = null;
/*@cc_on @*/
/*@if (@_jscript_version >= 5)
// JScript gives us Conditional compilation, we can cope with old IE versions.
// and security blocked creation of the objects.
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
xmlhttp = false;
}
}
@end @*/
if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
try {
xmlhttp = new XMLHttpRequest();
} catch (e) {
xmlhttp=false;
}
}
if (!xmlhttp && window.createRequest) {
try {
xmlhttp = window.createRequest();
} catch (e) {
xmlhttp=false;
}
}
function start_tail() {
if(!running) {
running = true;
load_lines();
}
$("start_button").disabled = true;
$("stop_button").disabled = false;
}
function stop_tail() {
running = false;
$("start_button").disabled = false;
$("stop_button").disabled = true;
}
function add_lines(text) {
var text_box = box_iframe.doc.getElementById("text_box");
if(text != "") {
text_box.innerHTML += text + '\n';
current_line += text.split('\n').length
}
setTimeout(load_lines, updateInterval);
if($("autoscroll").value) {
// Ack! Does not work on Firefox!
box_iframe.scrollTo(0, box_iframe.doc.body.scrollHeight);
}
}
function load_lines() {
if(!running) {
return;
}
xmlhttp.open("GET", "http://HOST_ADDRESS/tail?file=FILE_NAME&start_line=" + current_line, true);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
add_lines(xmlhttp.responseText);
}
}
xmlhttp.send(null);
}
</script>
</head>
<body>
<!-- Controls -->
File: <span id="file_name">FILE_NAME</span>
<div style="float:right">
<input id="autoscroll" type="checkbox"/>Autoscroll</input>
<input id="start_at_end" type="checkbox" value="true" disabled="true"/>Start at end</input>
<button id="start_button" onClick="start_tail()">Start tail -f</button>
<button id="stop_button" disabled="true" onClick="stop_tail()">Stop</button>
</div>
<br> <br>
<!-- Text frame -->
<div id="file_canvas"></div>
<!-- <iframe id="text_frame"></iframe>-->
<script>
box_iframe = IFrame(document.getElementById("file_canvas"));
box_iframe.id = "text_frame";
var text_box = box_iframe.doc.createElement("pre");
text_box.id = "text_box";
box_iframe.doc.body.appendChild(text_box);
</script>
</body>
</html>