chat.php

ajax开发的聊天室,无刷新技术实现,用于开发在线聊天室.

<?php
/****************************************
*	Mini AJAX Chatroom By Longbill
*	   http://www.longbill.cn
*	 Longbill all rights reserved
*	         2006-08-16
****************************************/
//****************参数设置****************
//显示在线用户
$disonline = 1;
//新登陆时显示最近内容的条数(默认为30条)
$leastnum = 30;
//默认的房间名(默认是每天换一个文件)，如果去掉d，则是每月换一个文件
$room = date("Y-m");
//房间保存路径,必须仿quot;/"结尾,可以丿quot;../"，等
$roomdir = "rooms/";
//编码方式
$charset = "GB2312";
//客户端最大显示内容条数(建议不要太大)
$maxdisplay = 300;
//语言包
$lang = array(
//聊天室描述
"description"=>"Welcome to my chatroom!! More : <a href='http://longbill.cn' target=_blank>www.longbill.cn</a>", 
//聊天室标题
"title"=>"Mini AJAX Chatroom By Longbill", 
//第一个到聊天室的欢迎
"firstone"=>"<span style='color:#16a5e9;'>Welcome to Longbill's Mini AJAX Chatroom!</span>", 
//当信息有禁止内容时显示
"ban"=>"I am a pig!",
//关键字
"keywords"=>"Mini,AJAX,Chat,Chatroom,Longbill,Longbill.cn,PHP,Javascript",
//发言提示
"hereyourwords" => "在这里发言!"
);

$touchs = 10;
$title = $lang["title"];
$earlier = 10;
$description = $lang["description"];
$origroom = $room;
$least = ($_GET["dis"])?intval($_GET["dis"]):$leastnum;
if ($_GET["room"]) $room = $_GET["room"];
$room = checkfilename($room);
if (!$room) $room = $origroom;
$filename = $roomdir.$room.".dat.php";
$datafile = $roomdir.$room.".php";
if (!file_exists($filename)) @file_put_contents($filename,'<?php die();?>'."\n".time()."|".$lang["firstone"]."\n");
if (!file_exists($datafile)) @file_put_contents($datafile,'<?php die();?>'."\n");
$action = $_GET["action"];


if (!function_exists("file_get_contents"))
{
	function file_get_contents($path)
	{
		if (!file_exists($path)) return false;
		$fp=@fopen($path,"r");
		$all=fread($fp,filesize($path));
		fclose($fp);
		return $all;
	}
}

if (!function_exists("file_put_contents"))
{
	function file_put_contents($path,$val)
	{
		$fp=@fopen($path,"w");
		fputs($fp,$val);
		fclose($fp);
		return true;
	}
}

function checkfilename($file)
{
	if (!$file) return "";
	$file = trim($file);
	$a = substr($file,-1);
	$file = eregi_replace("^[.\\\/]*","",$file);
	$file = eregi_replace("[.\\\/]*$","",$file);
	$arr = array("../","./","/","\\","..\\",".\\");
	$file = str_replace($arr,"",$file);
	return $file;
}

function get_ip()
{
	global $_SERVER;
	if ($_SERVER)
	{
		if ( $_SERVER[HTTP_X_FORWARDED_FOR] )
			$realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
		else if ( $_SERVER["HTTP_CLIENT_ip"] )
			$realip = $_SERVER["HTTP_CLIENT_ip"];
		else
			$realip = $_SERVER["REMOTE_ADDR"];
	}
	else
	{
		if ( getenv( 'HTTP_X_FORWARDED_FOR' ) )
			$realip = getenv( 'HTTP_X_FORWARDED_FOR' );
		else if ( getenv( 'HTTP_CLIENT_ip' ) ) 
			$realip = getenv( 'HTTP_CLIENT_ip' );
		else
			$realip = getenv( 'REMOTE_ADDR' );
	}
	return $realip;
}

function array2json($arr)
{
	$keys = array_keys($arr);
	$isarr = true;
	$json = "";
	for($i=0;$i<count($keys);$i++)
	{
		if ($keys[$i] !== $i)
		{
			$isarr = false;
			break;
		}
	}
	$json = $space;
	$json.= ($isarr)?"[":"{";
	for($i=0;$i<count($keys);$i++)
	{
		if ($i!=0) $json.= ",";
		$item = $arr[$keys[$i]];
		$json.=($isarr)?"":$keys[$i].':';
		if (is_array($item))
			$json.=array2json($item);
		else if (is_string($item))
			$json.='"'.str_replace(array("\r","\n"),"",$item).'"';
		else $json.=$item;
	}
	$json.= ($isarr)?"]":"}";
	return $json;
}

if ($action == "write")
{
	$color = $_GET["color"];
	if (!eregi("[0-9a-fA-F]{6}",$color) || $color == "#000000") $color = "";
	$color = "#".$color;
	$size = intval($_GET["size"]);
	$arr = @file("php://input");
	$name = str_replace(array("\n","\r"),"",$arr[0]);
	$ip = get_ip();
	if ($disonline)
	{
		$onlines = @file_get_contents($datafile);
		$s1 = "|{$name}|{$ip}|";
		if (strpos($onlines,$s1) === false)
		{
			if (strpos($onlines,"|".$name."|") === false)
			{
				$fp = @fopen($datafile,"a+");
				if ($fp)
				{
					if (@flock($fp, LOCK_EX))
					{
						@fputs($fp,time()."|".time().$s1."\n");
						@flock($fp, LOCK_UN);
					}
					@fclose($fp);
				}
			}
			else
			{
				echo "NAME";
				die();
			}
		}
	}
	
	$s = "";
	$style = "";
	$font = $_GET["font"];
	if ($font == "songti") $font = "瀹嬩綋";
	else if ($font == "heiti") $font = "榛戜綋";
	else if ($font == "kaiti") $font = "妤蜂綋_GB2312";
	else $font = "";
	$style .= (!$font)?"":"font-family:".$font.";";
	$style .= (!$_GET["bold"])?"":"font-weight:bold;";
	$style .= (!$color || $color == "#")?"":"color:{$color};";
	$style .= (!$size || $size == "16")?"":"font-size:{$size}px;";
	$t = time();
	for($i = 1;$i<count($arr);$i++)
	{
		$content = $arr[$i];
		$content = str_replace(array("\n","\r"),"",$content);
		if ($content == "") continue;
		$content = str_replace(array("<img","<IMG","</img","</IMG"),array("[img","[img","[/img","[/img"),$content);
		$content = htmlspecialchars($content);
		$content = str_replace(array("[img","[/img"),array("<img","</img"),$content);
		$content = ($style)?"<span style='{$style}'>{$content}</span>":$content;
		$s.= $t."|".$name.":".$content."\n";
	}
	if (!$name) die("No Name!!");
	if (!$s) die("No Content!!");
	$fp = @fopen($filename,"a+");
	if (!$fp) die("repeat");
	if (@flock($fp, LOCK_EX))
	{
		@fputs($fp,$s);
		@flock($fp, LOCK_UN);
	}
	else die("repeat");
	@fclose($fp);
	echo "OK";
}
else if (trim($action) == "read")
{
	header("CONTENT-TYPE:TEXT/HTML; CHARSET=UTF-8;");
	$first = $_GET["first"];
	$lastmod = intval($_GET["lastmod"]);
	$alastmod = @filemtime($filename);
	$name = file_get_contents("php://input");
	$name = str_replace("\n","",$name);
	$ip = get_ip();
	$json = array();
	$json["lastmod"] = $alastmod;
	$item = array();
	$newonline = array();
	$offline = array();
	
	$lines = @file($filename);
	if ($alastmod > $lastmod && !$first)
	{
		foreach($lines as $l)
		{
			$item2 = array();
			$l = str_replace(array("\n","\r"),"",$l);
			if (strpos($l,"|") === false) continue;
			$arr = explode("|",$l);
			$t = intval($arr[0]);
			if ($t > $lastmod)
			{
				$item2["time"] = date("H:i:s",$t);
				$item2["word"] = addslashes($arr[1]);
				$item[] = $item2;
			}
		}
	}
	else if ($first)
	{
		$item = array();
		$total = count($lines);
		for($i=$total-1;$i>=$total-$least;$i--)
		{
			if ($i<=0) break;
			$item2 = array();
			$l = str_replace(array("\n","\r"),"",$lines[$i]);
			if (strpos($l,"|") === false) continue;
			$arr = explode("|",$l);
			$t = intval($arr[0]);
			$item2["time"] = (date("m-d",time()) == date("m-d",$t))?date("H:i:s",$t):date("m-d H:i",$t);
			$item2["word"] = addslashes($arr[1]);
			$item[] = $item2;
		}
		$item = array_reverse($item);
	}
	
	$s = "";
	$nt = time();
	$onlines = array();
	if($disonline && $touchme)
	{
		$users = @file($datafile);
		foreach($users as $l)
		{
			$l = str_replace(array("\r","\n"),"",$l);
			if (strpos($l,"|") === false)
			{
				$s.=$l."\n";
				continue;
			}
			$arr = explode("|",$l);
			if ($nt - intval($arr[1]) < $touchs*2+1)
			{
				if (trim($name) == trim($arr[2]))
				{
					$s.= $arr[0]."|".time()."|".$name."|".get_ip()."|\n";
				}
				else $s.=$l."\n";
				$onlines [] = $arr[2];
			}
		}
		@file_put_contents($datafile,$s);
		$json["onlines"] = $onlines;
	}
	$json["lines"] = $item;
	echo array2json($json);
}
else
{
?>
<html>
<head>
 <title><?php echo $title;?></title>
 <meta http-equiv='Pragma' content='no-cache' />
 <meta http-equiv=Content-Type content="text/html; charset=<?php echo $charset;?>" />
 <meta name="keywords" content="<?php echo $lang["keywords"];?>">
 <meta name="description" content="Mini AJAX Chatroom By Longbill. <?php echo $description;?>">

<style type='text/css'>
body	{ text-align:center; color:#333333; font-size:12px; font-family:宋体;}
a	{ text-decoration:none; color:#a2b700; }
.mydiv	{ text-align:left; margin:5px; padding:5px; border:1px solid #ff8c05; background-color:#fdd283; width:600px; }
.inputtext	{ border:0px; border-bottom:1px solid #333333; background-color:transparent;}
.submit	{ border:1px solid #ff8c05; background-color:transparent; }
.contents	{ border:1px solid #ff8c05;margin:5px; margin-top:10px;background-color:#ffffff; overflow:auto;word-break:break-all;word-wrap :break-word;}
.bg	{ background-color:#ffffff; }
.content	{ border:0px;background-color:transparent;width:auto; font-size:16px; font-family:Fixedsys; margin:2px; padding:1px; }
.time	{ color:#aaaaaa; font-size:10px; font-family:Arial;}
.online	{ margin:5px; padding:0px; display:inline; }
.mybut	{ width:20px; height:20px; background-color:#ff8c05; text-align:center; font-size:18px; color: #333333;}
</style>

<script>
function $(obj)
{
	return document.getElementById(obj);
}

function setCookie(name,value,t)
{
	var cookieexp = 5*30*24*60*60*1000; //5 months
	var cookiestr=name+"="+escape(value)+";";
	var expires = "";
	var d = new Date();
	var t2=(!t)?cookieexp:t*60*1000;
	d.setTime( d.getTime() + cookieexp);
	expires = "expires=" + d.toGMTString()+";";
	document.cookie = cookiestr+ expires;
}

function getCookie(name)
{
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) return "";
	if ( start == -1 ) return "";
	var end = document.cookie.indexOf( ";", len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}

function sack(file) {
	this.xmlhttp = null;

	this.resetData = function() {
		this.method = "GET";
		this.URLString = "";
		this.encodeURL = true;
		this.file = file;
		this.late = true;
		this.failed = false;
  	};

	this.resetFunctions = function() {
  		this.onLoading = function() { };
  		this.onLoaded = function() { };
  		this.onInteractive = function() { };
  		this.onCompletion = function() { };
  		this.onError = function() { };
		this.encode = (encodeURIComponent && this.encodeURL)?function(s) {
			return encodeURIComponent(s);
		}:function(s){return s;}
	};

	this.reset = function() {
		this.resetFunctions();