基于Nginx的Mencached缓存配置详解

简介

memcached是一套分布式的高速缓存系统，memcached缺乏认证以及安全管制，这代表应该将memcached服务器放置在防火墙后。memcached的API使用三十二比特的循环冗余校验（CRC-32）计算键值后，将数据分散在不同的机器上。当表格满了以后，接下来新增的数据会以LRU机制替换掉。由于memcached通常只是当作缓存系统使用，所以使用memcached的应用程序在写回较慢的系统时（像是后端的数据库）需要额外的代码更新memcached内的数据

特征

memcached作为高速运行的分布式缓存服务器，具有以下的特点:

协议简单
基于libevent的事件处理
内置内存存储方式
memcached不互相通信的分布式

前期准备

准备三台Centos7虚拟机，配置IP地址和hostname，关闭防火墙和selinux，同步系统时间，修改IP地址和hostname映射

ip	hostname
192.168.29.132	master
192.168.29.138	bak
192.168.29.133	mid

master和bak机器部署Nginx和PHP

部署memcache

mid机器部署memcached客户端

[root@mid ~]# yum install memcached -y

#启动服务

[root@mid ~]# systemctl start memcached.service

#查看启动情况,点击回车出现ERROR则启动成功

[root@master ~]# telnet 192.168.29.133 11211

Trying 192.168.29.133...

Connected to 192.168.29.133.

Escape character is '^]'.

ERROR

master和mid机器部署PHP的memcached扩展

下载libmemcached和memcached压缩包

#解压并安装libmemcached

[root@master ~]#tar -xvf libmemcached-1.0.18.tar.gz

[root@master ~]#cd libmemcached-1.0.18

#若编译报错，将clients/memflush.cc中报错相应位置的false改为NULL

[root@master ~]#./configure --prefix=/usr/local/libmemcached

make && make install

#解压并安装memcached

[root@master ~]#tar -zxvf memcached-3.1.5.tgz

[root@master ~]#cd memcached-3.1.5

[root@master ~]#phpize

[root@master ~]#./configure --with-libmemcached-dir=/usr/local/libmemcached --disable-memcached-sasl

[root@master ~]#make && make install

#完成后观察php目录下的lib/php/extensions/no-debug-zts-20170718/是否有扩展

memcached.so

#添加扩展至php配置文件

[root@master ~]# vi /usr/local/php/etc/php.ini

extension=memcached.so

测试验证

[root@master ~]# vi /usr/local/nginx/html/test.php

<?php

phpinfo();

?>

访问http://ip/test.php

注:bak机器进行相同操作

配置缓存

配置Nginx配置文件

[root@master ~]# cat /usr/local/nginx/conf/nginx.conf

worker_processes 1;

events {

worker_connections 1024;

}

http {

include mime.types;

default_type application/octet-stream;

sendfile on;

keepalive_timeout 65;

server {

listen 80;

server_name localhost;

location / {

root html;

index index.html index.htm;

}

#memcached缓存配置，有缓存则读取，没有缓存则报404错误

location /demo/ {

set $memcached_key $request_uri;

add_header X-mem-key $memcached_key;

memcached_pass 192.168.29.133:11211;

default_type text/html;

#报错后转到特定Location

error_page 404 502 504 = @mymemcached;

}

#配置重写策略执行特定php文件

location @mymemcached {

rewrite .* /demo.php?key=$request_uri;

}

location ~ .php$ {

root html;

fastcgi_pass 127.0.0.1:9000;

fastcgi_index index.php;

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

include fastcgi_params;

}

编写PHP文件设置memcached缓存

#创建demo文件夹

[root@master ~] mkdir /usr/local/nginx/html/demo

#创建测试文件

[root@master ~] echo "123" >> /usr/local/nginx/html/demo/123.html

[root@master ~]# vi /usr/local/nginx/html/demo.php

<?php

$fn=dirname(__FILE__) . $_SERVER['REQUEST_URI'];

if(file_exists($fn)){

$data=file_get_contents($fn);

$m=new Memcached();

$server=array(

array('192.168.29.133',11211)

);

$m->addServers($server);

$r=$m->set($_GET['key'],$data);

header('Content-Length:'.filesize($fn)." ");

header('Content-Type:file'." ");

header('X-cache:MISS:'." ");

echo $data;

}

#不存在demo文件夹则返回首页

else{

header('Location:../index.html'." ");

}

?>

注:bak机器进行相同的设置

测试验证

#可看出第一次memcache中没有缓存，第二次击中缓存

[root@bak ~]# curl -I http://192.168.29.132/demo/123.html

HTTP/1.1 200 OK

Server: nginx/1.16.1

Date: Thu, 25 Jun 2020 02:23:00 GMT

Content-Type: file

Content-Length: 4

Connection: keep-alive

X-Powered-By: PHP/7.2.26

X-cache: MISS:

[root@bak ~]# curl -I http://192.168.29.132/demo/123.html

HTTP/1.1 200 OK

Server: nginx/1.16.1

Date: Thu, 25 Jun 2020 02:23:01 GMT

Content-Type: text/html

Content-Length: 4

Connection: keep-alive

X-mem-key: /demo/123.html

Accept-Ranges: bytes

#当设置缓存后，访问相同的缓存key时，即使发起访问的机器不相同也同样能击中缓存

[root@master ~]# curl -I http://192.168.29.138/demo/123.html

HTTP/1.1 200 OK

Server: nginx/1.16.1

Date: Thu, 25 Jun 2020 02:29:46 GMT

Content-Type: text/html

Content-Length: 4

Connection: keep-alive

X-mem-key: /demo/123.html

Accept-Ranges: bytes

查看memcached缓存状态

memcached监控文件

<?php

/*

+———————————————————————-+

|PHPVersion5|

+———————————————————————-+

|Copyright(c)1997-2004ThePHPGroup|

+———————————————————————-+

|Thissourcefileissubjecttoversion3.0ofthePHPlicense,|

|thatisbundledwiththispackageinthefileLICENSE,andis|

|availablethroughtheworld-wide-webatthefollowingurl:|

|http://www.php.net/license/3_0.txt.|

|IfyoudidnotreceiveacopyofthePHPlicenseandareunableto|

|obtainitthroughtheworld-wide-web,pleasesendanoteto|

|license@php.netsowecanmailyouacopyimmediately.|

+———————————————————————-+

|Author:HarunYayli<harunyayliatgmail.com>|

+———————————————————————-+

*/

//memcached图形化小工具

$VERSION='$Id:memcache.php,v1.1.2.32008/08/2818:07:54miklExp$';

#设置用户名

define('ADMIN_USERNAME','admin');

#设置密码

define('ADMIN_PASSWORD','123456');

define('DATE_FORMAT','Y/m/dH:i:s');

define('GRAPH_SIZE',200);

define('MAX_ITEM_DUMP',50);

#设置memcached主机信息

$MEMCACHE_SERVERS[]='192.168.29.133:11211';

//////////ENDOFDEFAULTCONFIGAREA/////////////////////////////////////////////////////////////

/////////////////Passwordprotect////////////////////////////////////////////////////////////////

if(!isset($_SERVER['PHP_AUTH_USER'])||!isset($_SERVER['PHP_AUTH_PW'])||

$_SERVER['PHP_AUTH_USER']!=ADMIN_USERNAME||$_SERVER['PHP_AUTH_PW']!=ADMIN_PASSWORD){

Header("WWW-Authenticate:Basicrealm="MemcacheLogin"");

Header("HTTP/1.0401Unauthorized");

echo<<<EOB

<html><body>

<h1>Rejected!</h1>

<big>WrongUsernameorPassword!</big>

</body></html>

EOB;

exit;

}

///////////MEMCACHEFUNCTIONS/////////////////////////////////////////////////////////////////////

functionsendMemcacheCommands($command){

global$MEMCACHE_SERVERS;

$result=array();

foreach($MEMCACHE_SERVERSas$server){

$strs=explode(':',$server);

$host=$strs[0];

$port=$strs[1];

$result[$server]=sendMemcacheCommand($host,$port,$command);

}

return$result;

}

functionsendMemcacheCommand($server,$port,$command){

$s=@fsockopen($server,$port);

if(!$s){

die("Cantconnectto:".$server.':'.$port);

}

fwrite($s,$command."");

$buf='';

while((!feof($s))){

$buf.=fgets($s,256);

if(strpos($buf,"END")!==false){//statsaysend

break;

}

if(strpos($buf,"DELETED")!==false||strpos($buf,"NOT_FOUND")!==false){//deletesaysthese

break;

}

if(strpos($buf,"OK")!==false){//flush_allsaysok

break;

}

}

fclose($s);

returnparseMemcacheResults($buf);

}

functionparseMemcacheResults($str){

$res=array();

$lines=explode("",$str);

$cnt=count($lines);

for($i=0;$i<$cnt;$i++){

$line=$lines[$i];

$l=explode('',$line,3);

if(count($l)==3){

$res[$l[0]][$l[1]]=$l[2];

if($l[0]=='VALUE'){//nextlineisthevalue

$res[$l[0]][$l[1]]=array();

list($flag,$size)=explode('',$l[2]);

$res[$l[0]][$l[1]]['stat']=array('flag'=>$flag,'size'=>$size);

$res[$l[0]][$l[1]]['value']=$lines[++$i];

}

}elseif($line=='DELETED'||$line=='NOT_FOUND'||$line=='OK'){

return$line;

}

}

return$res;

}

functiondumpCacheSlab($server,$slabId,$limit){

list($host,$port)=explode(':',$server);

$resp=sendMemcacheCommand($host,$port,'statscachedump'.$slabId.''.$limit);

return$resp;

}

functionflushServer($server){

list($host,$port)=explode(':',$server);

$resp=sendMemcacheCommand($host,$port,'flush_all');

return$resp;

}

functiongetCacheItems(){

$items=sendMemcacheCommands('statsitems');

$serverItems=array();

$totalItems=array();

foreach($itemsas$server=>$itemlist){

$serverItems[$server]=array();

$totalItems[$server]=0;

if(!isset($itemlist['STAT'])){

continue;

}

$iteminfo=$itemlist['STAT'];

foreach($iteminfoas$keyinfo=>$value){

if(preg_match('/items:(d+?):(.+?)$/',$keyinfo,$matches)){

$serverItems[$server][$matches[1]][$matches[2]]=$value;

if($matches[2]=='number'){

$totalItems[$server]+=$value;

}

}

}

}

returnarray('items'=>$serverItems,'counts'=>$totalItems);

}

functiongetMemcacheStats($total=true){

$resp=sendMemcacheCommands('stats');

if($total){

$res=array();

foreach($respas$server=>$r){

foreach($r['STAT']as$key=>$row){

if(!isset($res[$key])){

$res[$key]=null;

}

switch($key){

case'pid':

$res['pid'][$server]=$row;

break;

case'uptime':

$res['uptime'][$server]=$row;

break;

case'time':

$res['time'][$server]=$row;

break;

case'version':

$res['version'][$server]=$row;

break;

case'pointer_size':

$res['pointer_size'][$server]=$row;

break;

case'rusage_user':

$res['rusage_user'][$server]=$row;

break;

case'rusage_system':

$res['rusage_system'][$server]=$row;

break;

case'curr_items':

$res['curr_items']+=$row;

break;

case'total_items':

$res['total_items']+=$row;

break;

case'bytes':

$res['bytes']+=$row;

break;

case'curr_connections':

$res['curr_connections']+=$row;

break;

case'total_connections':

$res['total_connections']+=$row;

break;

case'connection_structures':

$res['connection_structures']+=$row;

break;

case'cmd_get':

$res['cmd_get']+=$row;

break;

case'cmd_set':

$res['cmd_set']+=$row;

break;

case'get_hits':

$res['get_hits']+=$row;

break;

case'get_misses':

$res['get_misses']+=$row;

break;

case'evictions':

$res['evictions']+=$row;

break;

case'bytes_read':

$res['bytes_read']+=$row;

break;

case'bytes_written':

$res['bytes_written']+=$row;

break;

case'limit_maxbytes':

$res['limit_maxbytes']+=$row;

break;

case'threads':

$res['rusage_system'][$server]=$row;

break;

}

}

}

return$res;

}

return$resp;

}

//////////////////////////////////////////////////////

//

//don'tcachethispage

//

header("Cache-Control:no-store,no-cache,must-revalidate");//HTTP/1.1

header("Cache-Control:post-check=0,pre-check=0",false);

header("Pragma:no-cache");//HTTP/1.0

functionduration($ts){

global$time;

$years=(int)((($time-$ts)/(7*86400))/52.177457);

$rem=(int)(($time-$ts)-($years*52.177457*7*86400));

$weeks=(int)(($rem)/(7*86400));

$days=(int)(($rem)/86400)-$weeks*7;

$hours=(int)(($rem)/3600)-$days*24-$weeks*7*24;

$mins=(int)(($rem)/60)-$hours*60-$days*24*60-$weeks*7*24*60;

$str='';

if($years==1)$str.="$yearsyear,";

if($years>1)$str.="$yearsyears,";

if($weeks==1)$str.="$weeksweek,";

if($weeks>1)$str.="$weeksweeks,";

if($days==1)$str.="$daysday,";

if($days>1)$str.="$daysdays,";

if($hours==1)$str.="$hourshourand";

if($hours>1)$str.="$hourshoursand";

if($mins==1)$str.="1minute";

else$str.="$minsminutes";

return$str;

}

//creategraphics

//

functiongraphics_avail(){

returnextension_loaded('gd');

}

functionbsize($s){

foreach(array('','K','M','G')as$i=>$k){

if($s<1024)break;

$s/=1024;

}

returnsprintf("%5.1f%sBytes",$s,$k);

}

//createmenuentry

functionmenu_entry($ob,$title){

global$PHP_SELF;

if($ob==$_GET['op']){

return"<li><aclass="child_active"href="$PHP_SELF&op=$ob">$title</a></li>";

}

return"<li><aclass="active"href="$PHP_SELF&op=$ob">$title</a></li>";

}

functiongetHeader(){

$header=<<<EOB

<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">

<html>

<head><title>MEMCACHEINFO</title>

<styletype="text/css"><!–

body{background:white;font-size:100.01%;margin:0;padding:0;}

body,p,td,th,input,submit{font-size:0.8em;font-family:arial,helvetica,sans-serif;}

*htmlbody{font-size:0.8em}

*htmlp{font-size:0.8em}

*htmltd{font-size:0.8em}

*htmlth{font-size:0.8em}

*htmlinput{font-size:0.8em}

*htmlsubmit{font-size:0.8em}

td{vertical-align:top}

a{color:black;font-weight:none;text-decoration:none;}

a:hover{text-decoration:underline;}

div.content{padding:1em1em1em1em;position:absolute;width:97%;z-index:100;}

h1.memcache{background:rgb(153,153,204);margin:0;padding:0.5em1em0.5em1em;}

*htmlh1.memcache{margin-bottom:-7px;}

h1.memcachea:hover{text-decoration:none;color:rgb(90,90,90);}

h1.memcachespan.logo{

background:rgb(119,123,180);

color:black;

border-right:solidblack1px;

border-bottom:solidblack1px;

font-style:italic;

font-size:1em;

padding-left:1.2em;

padding-right:1.2em;

text-align:right;

display:block;

width:130px;

}

h1.memcachespan.logospan.name{color:white;font-size:0.7em;padding:00.8em02em;}

h1.memcachespan.nameinfo{color:white;display:inline;font-size:0.4em;margin-left:3em;}

h1.memcachediv.copy{color:black;font-size:0.4em;position:absolute;right:1em;}

hr.memcache{

background:white;

border-bottom:solidrgb(102,102,153)1px;

border-style:none;

border-top:solidrgb(102,102,153)10px;

height:12px;

margin:0;

margin-top:1px;

padding:0;

}

ol,menu{margin:1em000;padding:0.2em;margin-left:1em;}

ol.menuli{display:inline;margin-right:0.7em;list-style:none;font-size:85%}

ol.menua{

background:rgb(153,153,204);

border:solidrgb(102,102,153)2px;

color:white;

font-weight:bold;

margin-right:0em;

padding:0.1em0.5em0.1em0.5em;

text-decoration:none;

margin-left:5px;

}

ol.menua.child_active{

background:rgb(153,153,204);

border:solidrgb(102,102,153)2px;

color:white;

font-weight:bold;

margin-right:0em;

padding:0.1em0.5em0.1em0.5em;

text-decoration:none;

border-left:solidblack5px;

margin-left:0px;

}

ol.menuspan.active{

background:rgb(153,153,204);

border:solidrgb(102,102,153)2px;

color:black;

font-weight:bold;

margin-right:0em;

padding:0.1em0.5em0.1em0.5em;

text-decoration:none;

border-left:solidblack5px;

}

ol.menuspan.inactive{

background:rgb(193,193,244);

border:solidrgb(182,182,233)2px;

color:white;

font-weight:bold;

margin-right:0em;

padding:0.1em0.5em0.1em0.5em;

text-decoration:none;

margin-left:5px;

}

ol.menua:hover{

background:rgb(193,193,244);

text-decoration:none;

}

div.info{

background:rgb(204,204,204);

border:solidrgb(204,204,204)1px;

margin-bottom:1em;

}

div.infoh2{

background:rgb(204,204,204);

color:black;

font-size:1em;

margin:0;

padding:0.1em1em0.1em1em;

}

div.infotable{

border:solidrgb(204,204,204)1px;

border-spacing:0;

width:100%;

}

div.infotableth{

background:rgb(204,204,204);

color:white;

margin:0;

padding:0.1em1em0.1em1em;

}

div.infotabletha.sortable{color:black;}

div.infotabletr.tr-0{background:rgb(238,238,238);}

div.infotabletr.tr-1{background:rgb(221,221,221);}

div.infotabletd{padding:0.3em1em0.3em1em;}

div.infotabletd.td-0{border-right:solidrgb(102,102,153)1px;white-space:nowrap;}

div.infotabletd.td-n{border-right:solidrgb(102,102,153)1px;}

div.infotabletdh3{

color:black;

font-size:1.1em;

margin-left:-0.3em;

}

.td-0a,.td-na,.tr-0a,tr-1a{

text-decoration:underline;

}

div.graph{margin-bottom:1em}

div.graphh2{background:rgb(204,204,204);;color:black;font-size:1em;margin:0;padding:0.1em1em0.1em1em;}

div.graphtable{border:solidrgb(204,204,204)1px;color:black;font-weight:normal;width:100%;}

div.graphtabletd.td-0{background:rgb(238,238,238);}

div.graphtabletd.td-1{background:rgb(221,221,221);}

div.graphtabletd{padding:0.2em1em0.4em1em;}

div.div1,div.div2{margin-bottom:1em;width:35em;}

div.div3{position:absolute;left:40em;top:1em;width:580px;}

//div.div3{position:absolute;left:37em;top:1em;right:1em;}

div.sorting{margin:1.5em0em1.5em2em}

.center{text-align:center}

.aright{position:absolute;right:1em}

.right{text-align:right}

.ok{color:rgb(0,200,0);font-weight:bold}

.failed{color:rgb(200,0,0);font-weight:bold}

span.box{

border:blacksolid1px;

border-right:solidblack2px;

border-bottom:solidblack2px;

padding:00.5em00.5em;

margin-right:1em;

}

span.green{background:#60F060;padding:00.5em00.5em}

span.red{background:#D06030;padding:00.5em00.5em}

div.authneeded{

background:rgb(238,238,238);

border:solidrgb(204,204,204)1px;

color:rgb(200,0,0);

font-size:1.2em;

font-weight:bold;

padding:2em;

text-align:center;

}

input{

background:rgb(153,153,204);

border:solidrgb(102,102,153)2px;

color:white;

font-weight:bold;

margin-right:1em;

padding:0.1em0.5em0.1em0.5em;

}

//–>

</style>

</head>

<body>

<divclass="head">

<h1class="memcache">

<spanclass="logo"><ahref="http://pecl.php.net/package/memcache"rel="externalnofollow">memcache</a></span>

<spanclass="nameinfo">memcache.phpby<ahref="http://livebookmark.net"rel="externalnofollow">HarunYayli</a></span>

</h1>

<hrclass="memcache">

</div>

<divclass=content>

EOB;

return$header;

}

functiongetFooter(){

global$VERSION;

$footer='</div><!–Basedonapc.php'.$VERSION.'–></body>

</html>

';

return$footer;

}

functiongetMenu(){

global$PHP_SELF;

echo"<olclass=menu>";

if($_GET['op']!=4){

echo<<<EOB

<li><ahref="$PHP_SELF&op={$_GET['op']}"rel="externalnofollow">RefreshData</a></li>

EOB;

}

else{

echo<<<EOB

<li><ahref="$PHP_SELF&op=2}"rel="externalnofollow">Back</a></li>

EOB;

}

echo

menu_entry(1,'ViewHostStats'),

menu_entry(2,'Variables');

echo<<<EOB

</ol>

<br/>

EOB;

}

//TODO,AUTH

$_GET['op']=!isset($_GET['op'])?'1':$_GET['op'];

$PHP_SELF=isset($_SERVER['PHP_SELF'])?htmlentities(strip_tags($_SERVER['PHP_SELF'],'')):'';

$PHP_SELF=$PHP_SELF.'?';

$time=time();

//sanitize_GET

foreach($_GETas$key=>$g){

$_GET[$key]=htmlentities($g);

}

//singleout

//whensingleoutisset,itonlygivesdetailsforthatserver.

if(isset($_GET['singleout'])&&$_GET['singleout']>=0&&$_GET['singleout']<count($MEMCACHE_SERVERS)){

$MEMCACHE_SERVERS=array($MEMCACHE_SERVERS[$_GET['singleout']]);

}

//displayimages

if(isset($_GET['IMG'])){

$memcacheStats=getMemcacheStats();

$memcacheStatsSingle=getMemcacheStats(false);

if(!graphics_avail()){

exit(0);

}

functionfill_box($im,$x,$y,$w,$h,$color1,$color2,$text='',$placeindex=''){

global$col_black;

$x1=$x+$w-1;

$y1=$y+$h-1;

imagerectangle($im,$x,$y1,$x1+1,$y+1,$col_black);

if($y1>$y)imagefilledrectangle($im,$x,$y,$x1,$y1,$color2);

elseimagefilledrectangle($im,$x,$y1,$x1,$y,$color2);

imagerectangle($im,$x,$y1,$x1,$y,$color1);

if($text){

if($placeindex>0){

if($placeindex<16)

{

$px=5;

$py=$placeindex*12+6;

imagefilledrectangle($im,$px+90,$py+3,$px+90-4,$py-3,$color2);

imageline($im,$x,$y+$h/2,$px+90,$py,$color2);

imagestring($im,2,$px,$py-6,$text,$color1);

}else{

if($placeindex<31){

$px=$x+40*2;

$py=($placeindex-15)*12+6;

}else{

$px=$x+40*2+100*intval(($placeindex-15)/15);

$py=($placeindex%15)*12+6;

}

imagefilledrectangle($im,$px,$py+3,$px-4,$py-3,$color2);

imageline($im,$x+$w,$y+$h/2,$px,$py,$color2);

imagestring($im,2,$px+2,$py-6,$text,$color1);

}

}else{

imagestring($im,4,$x+5,$y1-16,$text,$color1);

}

}

}

functionfill_arc($im,$centerX,$centerY,$diameter,$start,$end,$color1,$color2,$text='',$placeindex=0){

$r=$diameter/2;

$w=deg2rad((360+$start+($end-$start)/2)%360);

if(function_exists("imagefilledarc")){

//existsonlyifGD2.0.1isavaliable

imagefilledarc($im,$centerX+1,$centerY+1,$diameter,$diameter,$start,$end,$color1,IMG_ARC_PIE);

imagefilledarc($im,$centerX,$centerY,$diameter,$diameter,$start,$end,$color2,IMG_ARC_PIE);

imagefilledarc($im,$centerX,$centerY,$diameter,$diameter,$start,$end,$color1,IMG_ARC_NOFILL|IMG_ARC_EDGED);

}else{

imagearc($im,$centerX,$centerY,$diameter,$diameter,$start,$end,$color2);

imageline($im,$centerX,$centerY,$centerX+cos(deg2rad($start))*$r,$centerY+sin(deg2rad($start))*$r,$color2);

imageline($im,$centerX,$centerY,$centerX+cos(deg2rad($start+1))*$r,$centerY+sin(deg2rad($start))*$r,$color2);

imageline($im,$centerX,$centerY,$centerX+cos(deg2rad($end-1))*$r,$centerY+sin(deg2rad($end))*$r,$color2);

imageline($im,$centerX,$centerY,$centerX+cos(deg2rad($end))*$r,$centerY+sin(deg2rad($end))*$r,$color2);

imagefill($im,$centerX+$r*cos($w)/2,$centerY+$r*sin($w)/2,$color2);

}

if($text){

if($placeindex>0){

imageline($im,$centerX+$r*cos($w)/2,$centerY+$r*sin($w)/2,$diameter,$placeindex*12,$color1);

imagestring($im,4,$diameter,$placeindex*12,$text,$color1);

}else{

imagestring($im,4,$centerX+$r*cos($w)/2,$centerY+$r*sin($w)/2,$text,$color1);

}

}

}

$size=GRAPH_SIZE;//imagesize

$image=imagecreate($size+50,$size+10);

$col_white=imagecolorallocate($image,0xFF,0xFF,0xFF);

$col_red=imagecolorallocate($image,0xD0,0x60,0x30);

$col_green=imagecolorallocate($image,0x60,0xF0,0x60);

$col_black=imagecolorallocate($image,0,0,0);

imagecolortransparent($image,$col_white);

switch($_GET['IMG']){

case1://piechart

$tsize=$memcacheStats['limit_maxbytes'];

$avail=$tsize-$memcacheStats['bytes'];

$x=$y=$size/2;

$angle_from=0;

$fuzz=0.000001;

foreach($memcacheStatsSingleas$serv=>$mcs){

$free=$mcs['STAT']['limit_maxbytes']-$mcs['STAT']['bytes'];

$used=$mcs['STAT']['bytes'];

if($free>0){

//drawfree

$angle_to=($free*360)/$tsize;

$perc=sprintf("%.2f%%",($free*100)/$tsize);

fill_arc($image,$x,$y,$size,$angle_from,$angle_from+$angle_to,$col_black,$col_green,$perc);

$angle_from=$angle_from+$angle_to;

}

if($used>0){

//drawused

$angle_to=($used*360)/$tsize;

$perc=sprintf("%.2f%%",($used*100)/$tsize);

fill_arc($image,$x,$y,$size,$angle_from,$angle_from+$angle_to,$col_black,$col_red,'('.$perc.')');

$angle_from=$angle_from+$angle_to;

}

}

break;

case2://hitmiss

$hits=($memcacheStats['get_hits']==0)?1:$memcacheStats['get_hits'];

$misses=($memcacheStats['get_misses']==0)?1:$memcacheStats['get_misses'];

$total=$hits+$misses;

fill_box($image,30,$size,50,-$hits*($size-21)/$total,$col_black,$col_green,sprintf("%.1f%%",$hits*100/$total));

fill_box($image,130,$size,50,-max(4,($total-$hits)*($size-21)/$total),$col_black,$col_red,sprintf("%.1f%%",$misses*100/$total));

break;

}

header("Content-type:image/png");

imagepng($image);

exit;

}

echogetHeader();

echogetMenu();

switch($_GET['op']){

case1://hoststats

$phpversion=phpversion();

$memcacheStats=getMemcacheStats();

$memcacheStatsSingle=getMemcacheStats(false);

$mem_size=$memcacheStats['limit_maxbytes'];

$mem_used=$memcacheStats['bytes'];

$mem_avail=$mem_size-$mem_used;

$startTime=time()-array_sum($memcacheStats['uptime']);

$curr_items=$memcacheStats['curr_items'];

$total_items=$memcacheStats['total_items'];

$hits=($memcacheStats['get_hits']==0)?1:$memcacheStats['get_hits'];

$misses=($memcacheStats['get_misses']==0)?1:$memcacheStats['get_misses'];

$sets=$memcacheStats['cmd_set'];

$req_rate=sprintf("%.2f",($hits+$misses)/($time-$startTime));

$hit_rate=sprintf("%.2f",($hits)/($time-$startTime));

$miss_rate=sprintf("%.2f",($misses)/($time-$startTime));

$set_rate=sprintf("%.2f",($sets)/($time-$startTime));

echo<<<EOB

<divclass="infodiv1"><h2>GeneralCacheInformation</h2>

<tablecellspacing=0><tbody>

<trclass=tr-1><tdclass=td-0>PHPVersion</td><td>$phpversion</td></tr>

EOB;

echo"<trclass=tr-0><tdclass=td-0>MemcachedHost".((count($MEMCACHE_SERVERS)>1)?'s':'')."</td><td>";

$i=0;

if(!isset($_GET['singleout'])&&count($MEMCACHE_SERVERS)>1){

foreach($MEMCACHE_SERVERSas$server){

echo($i+1).'.<ahref="'.$PHP_SELF.'&singleout='.$i++.'"rel="externalnofollow">'.$server.'</a><br/>';

}

}

else{

echo'1.'.$MEMCACHE_SERVERS[0];

}

if(isset($_GET['singleout'])){

echo'<ahref="'.$PHP_SELF.'"rel="externalnofollow">(allservers)</a><br/>';

}

echo"</td></tr>";

echo"<trclass=tr-1><tdclass=td-0>TotalMemcacheCache</td><td>".bsize($memcacheStats['limit_maxbytes'])."</td></tr>";

echo<<<EOB

</tbody></table>

</div>

<divclass="infodiv1"><h2>MemcacheServerInformation</h2>

EOB;

foreach($MEMCACHE_SERVERSas$server){

echo'<tablecellspacing=0><tbody>';

echo'<trclass=tr-1><tdclass=td-1>'.$server.'</td><td><ahref="'.$PHP_SELF.'&server='.array_search($server,$MEMCACHE_SERVERS).'&op=6"rel="externalnofollow">[<b>Flushthisserver</b>]</a></td></tr>';

echo'<trclass=tr-0><tdclass=td-0>StartTime</td><td>',date(DATE_FORMAT,$memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'</td></tr>';

echo'<trclass=tr-1><tdclass=td-0>Uptime</td><td>',duration($memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'</td></tr>';

echo'<trclass=tr-0><tdclass=td-0>MemcachedServerVersion</td><td>'.$memcacheStatsSingle[$server]['STAT']['version'].'</td></tr>';

echo'<trclass=tr-1><tdclass=td-0>UsedCacheSize</td><td>',bsize($memcacheStatsSingle[$server]['STAT']['bytes']),'</td></tr>';

echo'<trclass=tr-0><tdclass=td-0>TotalCacheSize</td><td>',bsize($memcacheStatsSingle[$server]['STAT']['limit_maxbytes']),'</td></tr>';

echo'</tbody></table>';

}

echo<<<EOB

</div>

<divclass="graphdiv3"><h2>HostStatusDiagrams</h2>

<tablecellspacing=0><tbody>

EOB;

$size='width='.(GRAPH_SIZE+50).'height='.(GRAPH_SIZE+10);

echo<<<EOB

<tr>

<tdclass=td-0>CacheUsage</td>

<tdclass=td-1>Hits&Misses</td>

</tr>

EOB;

echo

graphics_avail()?

'<tr>'.

"<tdclass=td-0><imgalt=""$sizesrc="$PHP_SELF&IMG=1&".(isset($_GET['singleout'])?'singleout='.$_GET['singleout'].'&':'')."$time"></td>".

"<tdclass=td-1><imgalt=""$sizesrc="$PHP_SELF&IMG=2&".(isset($_GET['singleout'])?'singleout='.$_GET['singleout'].'&':'')."$time"></td></tr>"

:"",

'<tr>',

'<tdclass=td-0><spanclass="greenbox"> </span>Free:',bsize($mem_avail).sprintf("(%.1f%%)",$mem_avail*100/$mem_size),"</td>",

'<tdclass=td-1><spanclass="greenbox"> </span>Hits:',$hits.sprintf("(%.1f%%)",$hits*100/($hits+$misses)),"</td>",

'</tr>',

'<tr>',

'<tdclass=td-0><spanclass="redbox"> </span>Used:',bsize($mem_used).sprintf("(%.1f%%)",$mem_used*100/$mem_size),"</td>",

'<tdclass=td-1><spanclass="redbox"> </span>Misses:',$misses.sprintf("(%.1f%%)",$misses*100/($hits+$misses)),"</td>";

echo<<<EOB

</tr>

</tbody></table>

<br/>

<divclass="info"><h2>CacheInformation</h2>

<tablecellspacing=0><tbody>

<trclass=tr-0><tdclass=td-0>CurrentItems(total)</td><td>$curr_items($total_items)</td></tr>

<trclass=tr-1><tdclass=td-0>Hits</td><td>{$hits}</td></tr>

<trclass=tr-0><tdclass=td-0>Misses</td><td>{$misses}</td></tr>

<trclass=tr-1><tdclass=td-0>RequestRate(hits,misses)</td><td>$req_ratecacherequests/second</td></tr>

<trclass=tr-0><tdclass=td-0>HitRate</td><td>$hit_ratecacherequests/second</td></tr>

<trclass=tr-1><tdclass=td-0>MissRate</td><td>$miss_ratecacherequests/second</td></tr>

<trclass=tr-0><tdclass=td-0>SetRate</td><td>$set_ratecacherequests/second</td></tr>

</tbody></table>

</div>

EOB;

break;

case2://variables

$m=0;

$cacheItems=getCacheItems();

$items=$cacheItems['items'];

$totals=$cacheItems['counts'];

$maxDump=MAX_ITEM_DUMP;

foreach($itemsas$server=>$entries){

echo<<<EOB

<divclass="info"><tablecellspacing=0><tbody>

<tr><thcolspan="2">$server</th></tr>

<tr><th>SlabId</th><th>Info</th></tr>

EOB;

foreach($entriesas$slabId=>$slab){

$dumpUrl=$PHP_SELF.'&op=2&server='.(array_search($server,$MEMCACHE_SERVERS)).'&dumpslab='.$slabId;

echo

"<trclass=tr-$m>",

"<tdclass=td-0><center>",'<ahref="',$dumpUrl,'"rel="externalnofollow">',$slabId,'</a>',"</center></td>",

"<tdclass=td-last><b>Itemcount:</b>",$slab['number'],'<br/><b>Age:</b>',duration($time-$slab['age']),'<br/><b>Evicted:</b>',((isset($slab['evicted'])&&$slab['evicted']==1)?'Yes':'No');

if((isset($_GET['dumpslab'])&&$_GET['dumpslab']==$slabId)&&(isset($_GET['server'])&&$_GET['server']==array_search($server,$MEMCACHE_SERVERS))){

echo"<br/><b>Items:item</b><br/>";

$items=dumpCacheSlab($server,$slabId,$slab['number']);

//maybesomeonelikestodoapaginationhere:)

$i=1;

foreach($items['ITEM']as$itemKey=>$itemInfo){

$itemInfo=trim($itemInfo,'[]');

echo'<ahref="',$PHP_SELF,'&op=4&server=',(array_search($server,$MEMCACHE_SERVERS)),'&key=',base64_encode($itemKey).'"rel="externalnofollow">',$itemKey,'</a>';

if($i++%10==0){

echo'<br/>';

}

elseif($i!=$slab['number']+1){

echo',';

}

}

}

echo"</td></tr>";

$m=1-$m;

}

echo<<<EOB

</tbody></table>

</div><hr/>

EOB;

}

break;

break;

case4://itemdump

if(!isset($_GET['key'])||!isset($_GET['server'])){

echo"Nokeyset!";

break;

}

//I'mnotdoinganythingtocheckthevalidityofthekeystring.

//probablyanexploitcanbewrittentodeleteallthefilesinkey=base64_encode("deleteall").

//somebodyhastodoafixtothis.

$theKey=htmlentities(base64_decode($_GET['key']));

$theserver=$MEMCACHE_SERVERS[(int)$_GET['server']];

list($h,$p)=explode(':',$theserver);

$r=sendMemcacheCommand($h,$p,'get'.$theKey);

echo<<<EOB

<divclass="info"><tablecellspacing=0><tbody>

<tr><th>Server<th>Key</th><th>Value</th><th>Delete</th></tr>

EOB;

echo"<tr><tdclass=td-0>",$theserver,"</td><tdclass=td-0>",$theKey,

"<br/>flag:",$r['VALUE'][$theKey]['stat']['flag'],

"<br/>Size:",bsize($r['VALUE'][$theKey]['stat']['size']),

"</td><td>",chunk_split($r['VALUE'][$theKey]['value'],40),"</td>",

'<td><ahref="',$PHP_SELF,'&op=5&server=',(int)$_GET['server'],'&key=',base64_encode($theKey),"rel="externalnofollow"">Delete</a></td>","</tr>";

echo<<<EOB

</tbody></table>

</div><hr/>

EOB;

break;

case5://itemdelete

if(!isset($_GET['key'])||!isset($_GET['server'])){

echo"Nokeyset!";

break;

}

$theKey=htmlentities(base64_decode($_GET['key']));

$theserver=$MEMCACHE_SERVERS[(int)$_GET['server']];

list($h,$p)=explode(':',$theserver);

$r=sendMemcacheCommand($h,$p,'delete'.$theKey);

echo'Deleting'.$theKey.':'.$r;

break;

case6://flushserver

$theserver=$MEMCACHE_SERVERS[(int)$_GET['server']];

$r=flushServer($theserver);

echo'Flush'.$theserver.":".$r;

break;

}

echogetFooter();

?>