Archief - AJAX: chatbox niet functioneel in FF

input, textarea { font-family: verdana; color:white; background:darkgreen; font-size: 13px; }
#content { width:500px; text-align:left; margin-left:10px; }

#chatwindow { border:0px solid #aaaaaa; padding:4px; background:#232D2F; color:white; width:450px; height:auto; font-family:courier new;}
#chatnick { border: 1px solid #00dd00; padding:4px; background:darkgreen;}
#chatmsg { border: 1px solid #00dd00; padding:4px; background:darkgreen; }

<div id="content">
<p id="chatwindow"> </p>
<!-- <textarea id="chatwindow" rows="19" cols="95" readonly></textarea><br>
-->
<input id="chatnick" type="text" size="9" maxlength="12" >&nbsp;
<input id="chatmsg" type="text" size="40" maxlength="80" onkeyup="keyup(event.keyCode);">
<input type="button" value="Zend" onclick="submit_msg();" style="cursor:pointer;border:1px solid #00dd00;"><br><br>
<br>
</div>



<script type="text/javascript">
/****************************************************************
* Most Simple Ajax Chat Script (www.linuxuser.at) *
* Version: 3.1 *
* *
* Author: Chris (chris[at]linuxuser.at) *
* Contributors: Derek, BlueScreenJunky (http://forums.linuxuser.at/viewtopic.php?f=6&t=17)
* *
* Licence: GPLv2 *
****************************************************************/

/* Settings you might want to define */
var waittime=800;

/* Internal Variables & Stuff */
chatmsg.focus()
document.getElementById("chatwindow").innerHTML = "loading...";

var xmlhttp = false;
var xmlhttp2 = false;


/* Request for Reading the Chat Content */
function ajax_read(url) {
if(window.XMLHttpRequest){
xmlhttp=new XMLHttpRequest();
if(xmlhttp.overrideMimeType){
xmlhttp.overrideMimeType('text/xml');
}
} else if(window.ActiveXObject){
try{
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
} catch(e){
}
}
}

if(!xmlhttp) {
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}

xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState==4) {
document.getElementById("chatwindow").innerHTML = xmlhttp.responseText;

zeit = new Date();
ms = (zeit.getHours() * 24 * 60 * 1000) + (zeit.getMinutes() * 60 * 1000) + (zeit.getSeconds() * 1000) + zeit.getMilliseconds();
intUpdate = setTimeout("ajax_read('chat.txt?x=" + ms + "')", waittime)
}
}

xmlhttp.open('GET',url,true);
xmlhttp.send(null);
}

/* Request for Writing the Message */
function ajax_write(url){
if(window.XMLHttpRequest){
xmlhttp2=new XMLHttpRequest();
if(xmlhttp2.overrideMimeType){
xmlhttp2.overrideMimeType('text/xml');
}
} else if(window.ActiveXObject){
try{
xmlhttp2=new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try{
xmlhttp2=new ActiveXObject("Microsoft.XMLHTTP");
} catch(e){
}
}
}

if(!xmlhttp2) {
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}

xmlhttp2.open('GET',url,true);
xmlhttp2.send(null);
}

/* Submit the Message */
function submit_msg(){
nick = document.getElementById("chatnick").value;
msg = document.getElementById("chatmsg").value;

if (nick == "") {
check = prompt("please enter username:");
if (check === null) return 0;
if (check == "") check = "anonymous";
document.getElementById("chatnick").value = check;
nick = check;
}

document.getElementById("chatmsg").value = "";
ajax_write("w.php?m=" + msg + "&n=" + nick);
}

/* Check if Enter is pressed */
function keyup(arg1) {
if (arg1 == 13) submit_msg();
}

/* Start the Requests! ;) */
var intUpdate = setTimeout("ajax_read('chat.txt')", waittime);

</script>

<?php
	/* author: chris at linuxuser.at 
		licence: GPLv2 
	*/
	
	$fn = "chat.txt";
	$maxlines = 18;
	$nick_length = 9;

	/* Set this to a minimum wait time between posts (in sec) */
	$waittime_sec = 0;	
	
	/* spam keywords */
	$spam[] = "nigger";
	$spam[] = "cum";
	$spam[] = "dick";
	$spam[] = "EAT coon";

	/* IP's to block */
	$blockip[] = "72.60.167.89";

	/* spam, if message IS exactly that string */	
	$espam[] = "ajax";
	
	/* Get Message & Nick from the Request and Escape them */
	$msg = $_REQUEST["m"];
	$msg = htmlspecialchars(stripslashes($msg));

	$n = $_REQUEST["n"];
	$n = htmlspecialchars(stripslashes($n));

	if (strlen($n) >= $nick_length) { 
		$n = substr($n, 0, $nick_length); 
	} else { 
		for ($i=strlen($n); $i<$nick_length; $i++) $n .= "&nbsp;";
	}

	if ($waittime_sec > 0) {
		$lastvisit = $_COOKIE["lachatlv"];
		setcookie("lachatlv", time());
 
		if ($lastvisit != "") {
			$diff = time() - $lastvisit;
			if ($diff < 5) { die();	}
		} 
	}

	if ($msg != "")  {
		if (strlen($msg) < 2) { die(); }
		if (strlen($msg) > 3) { 
			/* Smilies are ok */
			if (strtoupper($msg) == $msg) { die(); }
		}
		if (strlen($msg) > 150) { die(); }
		if (strlen($msg) > 15) { 
			if (substr_count($msg, substr($msg, 6, 8)) > 1) { die(); }
		}

		foreach ($blockip as $a) {
			if ($_SERVER["REMOTE_ADDR"] == $a) { die(); }
		}
		
		$mystring = strtoupper($msg);
		foreach ($spam as $a) {	
			 if (strpos($mystring, strtoupper($a)) === false) {
			 	/* Everything Ok Here */
			 } else {
			 	die();
			 }
		}		

		foreach ($espam as $a) {
			if (strtoupper($msg) == strtoupper($a)) { die(); }		
		}
				
		$handle = fopen ($fn, 'r'); 
		$chattext = fread($handle, filesize($fn)); fclose($handle);
		
		$arr1 = explode("\n", $chattext);

		if (count($arr1) > $maxlines) {
			/* Pruning */
			$arr1 = array_reverse($arr1);
			for ($i=0; $i<$maxlines; $i++) { $arr2[$i] = $arr1[$i]; }
			$arr2 = array_reverse($arr2);			
		} else {
			$arr2 = $arr1;
		}
		
		$chattext = implode("\n", $arr2);

		if (substr_count($chattext, $msg) > 2) { die(); }
		 
		$out = $chattext . $n . "&nbsp;| " . $msg . "<br>\n";
		$out = str_replace("\'", "'", $out);
		$out = str_replace("\\\"", "\"", $out);
		
		$handle = fopen ($fn, 'w'); fwrite ($handle, $out); fclose($handle);				
	}
?>