OOP (Sınıf) Kütüphanesi

[ByTRiSLaSiS]

Arkadaşlar bu başlık altında test edilmiş hali hazırda Sınıflarınızı paylaşabilir istekte bulunabilirsiniz...

 

[ByTRiSLaSiS]

Bazen işime yarayan bir sınıf hem dosya linkini gizlemek hem download ettirilecek dosyalara download limiti belirtmek için kullanıyorum

diyelimki bir user dosyayı download etmek istiyor download için linke tıkladıgında ilk 30 saniye 1 mb ile download ediyor 30 saniyeden sonra istediğiniz bir limite düşürüyor tabi bunları siz ayarlayabilirsiniz sınıf alıntıdır...



throttler.php

 <?php

/**
 * QoS Bandwidth Throttler (part of Lotos Framework)
 *
 * Copyright (c) 2005-2010 Artur Graniszewski (aargoth@boo.pl) 
 * All rights reserved.
 * 
 * @category   Library
 * @package    Lotos
 * @subpackage QoS
 * @copyright  Copyright (c) 2005-2010 Artur Graniszewski (aargoth@boo.pl)
 * @license    GNU LESSER GENERAL PUBLIC LICENSE Version 3, 29 June 2007
 * @version    $Id$
 */ 

/**
 * Configuration interface.
 */
interface IThrottleConfig {}

/**
 * Configuration class.
 */
class ThrottleConfig implements IThrottleConfig
{
    /**
     * Burst rate limit in bytes per second.
     * 
     * @var int
     */
    public $burstLimit = 80000;
    
    /**
     * Burst transfer rate time in seconds before reverting to the standard transfer rate.
     * 
     * @var int
     */
    public $burstTimeout = 20;

    /**
     * Standard rate limit in bytes per second.
     * 
     * @var int
     */
    public $rateLimit = 10000;
    
    /**
     * Enable/disable this module.
     * 
     * @var bool
     */
    public $enabled = false;
}

/**
 * Another configuration class.
 */
class ThrottleConfigBySize implements IThrottleConfig
{
    /**
     * Maximal peak rate limit in bytes per second.
     * 
     * @var int
     */
    public $burstLimit = 80000;
    
    /**
     * Size (in bytes) of the already transferred data wjile in burst rate transfer before reverting to standard transfer rate.
     * 
     * @var int
     */
    public $burstSize = 2000;

    /**
     * Standard rate limit in bytes per second.
     * 
     * @var int
     */
    public $rateLimit = 10000;
    
    /**
     * Enable/disable this module.
     * 
     * @var bool
     */
    public $enabled = false;
}

/**
 * The main class.
 */
class Throttle
{
    /**
     * Last heartbeat time in microseconds.
     * 
     * @var int
     */
    protected $lastHeartBeat = 0;
    
    /**
     * First (starting) heartbeat time in microseconds.
     * 
     * @var int
     */
    protected $firstHeartBeat = 0;
    
    /**
     * Number of bytes already sent.
     * 
     * @var int
     */
    protected $bytesSent = 0;
    
    /**
     * Total sending time in microseconds.
     * 
     * @var int
     */
    protected $sendingTime = 0;
    
    /**
     * Current transfer rate in bytes per second.
     * 
     * @var int
     */
    protected $currentLimit = 0;
    
    /**
     * Is this the last packet to send?
     * 
     * @var bool
     */
    protected $isFinishing = false;
    
    /**
     * @var ThrottleConfig
     */
    protected $config;
    
    /**
     * Create new instance of throttler
     * 
     * @param IThrottleConfig $config Configuration object or null to use system defaults
     * @return Throttle
     */
    public function __construct(IThrottleConfig $config = null) {
        if(function_exists('apache_setenv')) {
            // disable gzip HTTP compression so it would not alter the transfer rate
            apache_setenv('no-gzip', '1');
        }
        // disable the script timeout if supported by the server
        if(false === strpos(ini_get('disable_functions'), 'set_time_limit')) {
            // suppress the warnings (in case of the safe_mode)
            @set_time_limit(0);
        }
        if($config) {
            $this->config = $config;
        } else {
            $this->config = new ThrottleConfig();
        }
        
        // set the burst rate by default as the current transfer rate
        $this->currentLimit = $this->config->burstLimit;
        
        // set the output callback
        ob_start(array($this, 'onFlush'), $this->config->rateLimit);
    }
    
    /**
     * Throttler destructor
     * 
     * @return void
     */
    public function __destruct() {
        $this->isFinishing = true;
    }
    
    /**
     * Throttling mechanism
     * 
     * @param string $buffer Input buffer
     * @return string Output buffer (the same as input)
     */
    public function onFlush(& $buffer) {
        // do nothing when buffer is empty (in case of implicit ob_flush() or script halt)
        // and check if this is a last portion of the output, if it is - do not throttle
        if($buffer === "" || $this->isFinishing) {
            return $buffer;
        }
                
        // cache the buffer length for futher use
        $bufferLength = strlen($buffer);
        
        // cache current microtime to save us from executing too many system request
        $now = microtime(true);
        
        // initialize last heartbeat time if this is a first iteration of the callback
        if($this->lastHeartBeat === 0) {
            $this->lastHeartBeat = $this->firstHeartBeat = $now;
        }
        
        // calculate how much data have we have to send to the user, so we can set the appropriate time delay
        // if the buffer is smaller than the current limit (per second) send it proportionally faster than the full
        // data package
        $usleep = $bufferLength / $this->currentLimit;
        if($usleep > 0) {
            usleep($usleep * 1000000);
            $this->sendingTime += $usleep;
        }

        // check if the burst rate is active, and if we should switch it off (in both if cases)
        if($this->currentLimit === $this->config->burstLimit && $this->config->burstLimit !== $this->config->rateLimit) {
            if(isset($this->config->burstSize)) {
                if($this->config->burstSize < $this->bytesSent + $bufferLength) {
                    $this->currentLimit = $this->config->rateLimit;
                }            
            } else {
                if($now > ($this->firstHeartBeat + $this->config->burstTimeout)) {
                    $this->currentLimit = $this->config->rateLimit;
                }
            }
        }
        
        // update system statistics        
        $this->bytesSent += $bufferLength;
        $this->lastHeartBeat = $now;
        
        return $buffer;
    }
    
    /**
     * Returns throttle statistics.
     * 
     * @return stdClass
     */
    public function getStatistics() {
        if(ob_get_level() > 0) {
            ob_flush();
        }
        $stats = new stdClass();
        $stats->bytesSent = $this->bytesSent;
        $stats->sendingTime = $this->sendingTime;
        $stats->averageRate = $this->sendingTime > 0 ? $this->bytesSent/$this->sendingTime : $stats->bytesSent;
        return $stats;
    }
}

Kullanımı

require("./throttler.php");

//ayarlar
$config = new ThrottleConfig();
//30 saniye sonra hız düşsün
$config->burstTimeout = 30;
//30 saniyeden sonra 50 kb ile downloada devam etsin
$config->burstLimit = 50000;
//Standart aktarım 15kb geçmesin
$config->rateLimit = 15000;
// hız düşüme modulu devrede olsun false ise devre dışı
$config->enabled = true;

$x = new Throttle($config);


//test.txt  yerine download ettireceğiniz dosya
header("Content-type: application/force-download");
header("Content-Disposition: attachment; filename=\"test.txt\"");
header("Content-Length: 60000000");
  
for($i = 0; $i < 60000000; $i++) {
    echo "A";
}

 

[senuyurken]

Teşekkürler..

 

[selahattinunlu]

Kolay ve Hızlı Bir Şekilde Thumbnail Oluşturma Sınıfı

Ayrıca sadece resim uploadları için de kullanılabilir

Sınıf kodları : https://github.com/selahattinunlu/createThumbnail.class/blob/master/createThumbnail.php

Thumbnailli Kullanımı:https://github.com/selahattinunlu/createThumbnail.class/blob/master/examples/upload_and_thumbnail/upload.php

Normal Kullanımı :https://github.com/selahattinunlu/createThumbnail.class/blob/master/examples/only_upload/upload.php

Eksiklerim yada yanlışlarım varsa bilgilendirirseniz çok sevinirim

 

[Byvenoms]

Burdaki kodları işime yarayabilir