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Editing: SendFile.php

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<?php
// alex@cgi-central.net - W4 have changed just prefix from Noginn_ to Am_ to 
// do not create another folders tree. Thanks Tom for great code!
/**
* Sends a file for download
*
* @copyright Copyright (c) 2009 Tom Graham (http://www.noginn.com)
* @license http://www.opensource.org/licenses/mit-license.php
* @package Am_Controller
*/
class Am_Controller_Action_Helper_SendFile extends Zend_Controller_Action_Helper_Abstract
{
/**
* Set cache headers
*
* @param array $options
*/
    public function setCacheHeaders($options)
    {
        $response = $this->getResponse();
        
        $cacheControl = array();
        if (isset($options['public']) && $options['public']) {
            $cacheControl[] = 'public';
        }
        if (isset($options['no-cache']) && $options['no-cache']) {
            $cacheControl[] = 'no-cache';
        }
        if (isset($options['no-store']) && $options['no-store']) {
            $cacheControl[] = 'no-store';
        }
        if (isset($options['must-revalidate']) && $options['must-revalidate']) {
            $cacheControl[] = 'must-revalidate';
        }
        if (isset($options['proxy-validation']) && $options['proxy-validation']) {
            $cacheControl[] = 'proxy-validation';
        }
        if (isset($options['max-age'])) {
            $cacheControl[] = 'max-age=' . (int) $options['max-age'];
            $response->setHeader('Expires', gmdate('r', time() + $options['max-age']), true);
        }
        if (isset($options['s-maxage'])) {
            $cacheControl[] = 's-maxage=' . (int) $options['s-maxage'];
        }

$response->setHeader('Cache-Control', implode(',', $cacheControl), true);
        $response->setHeader('Pragma', 'public', true);
    }

/**
* Validate the cache using the If-Modified-Since request header
*
* @param int $modified When the file was last modified as a unix timestamp
* @return bool
*/
    public function notModifiedSince($modified)
    {
        if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $modified <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
            // Send a 304 Not Modified header
            $response = $this->getResponse();
            $response->setHttpResponseCode(304);
            $response->sendHeaders();
            return true;
        }

return false;
    }

/**
* Send a file for download
*
* @param string $path Path to the file
* @param string $type The mime-type of the file
* @param array $options
* @return bool Whether the headers and file were sent
*/
    public function sendFile($path, $type, $options = array())
    {
        $response = $this->getResponse();
        
        
        if (!is_readable($path)) 
            throw new Am_Exception_InternalError("File [$path] does not exists");
        
        if (!$response->canSendHeaders())
            throw new Am_Exception_InternalError("Headers are already sent");

// Set the cache-control
        if (isset($options['cache'])) {
            $this->setCacheHeaders($options['cache']);
        }

// Get the last modified time
        if (isset($options['modified'])) {
            $modified = (int) $options['modified'];
        } else {
            $modified = filemtime($path);
        }

// Validate the cache
        if (!isset($options['cache']['no-store']) && $this->notModifiedSince($modified)) {
            return true;
        }

// Set the file name
        if (isset($options['filename']) && !empty($options['filename'])) {
            $filename = $options['filename'];
        } else {
            $filename = basename($path);
        }

while (@ob_end_clean());
        
        $response->setHttpResponseCode(200);
        $response->setHeader('Content-Type', $type, true);
        $response->setHeader('Content-Disposition', $disposition . '; filename="' . $filename . '"', true);

// Do we want to use the X-Sendfile header or stream the file
        if (isset($options['xsendfile']) && $options['xsendfile']) {
            $response->setHeader('X-Sendfile', $path);
            $response->sendHeaders();
            return true;
        }
        
        
        $response->setHeader('Last-Modified', gmdate('r', $modified), true);
        $response->setHeader('Content-Length', filesize($path), true);
        $response->sendHeaders();

readfile($path);
        exit();
    }

/**
* Send file data as a download
*
* @param string $path Path to the file
* @param string $type The mime-type of the file
* @param string $filename The filename to send the file as, if null then use the base name of the path
* @param array $options
* @return bool Whether the headers and file were sent
*/
    public function sendData($data, $type, $filename, $options = array())
    {
        $response = $this->getResponse();
        
        if (!$response->canSendHeaders()) {
            return false;
        }

// Set the cache-control
        if (isset($options['cache'])) {
            $this->setCacheHeaders($options['cache']);
        }
        
        if (isset($options['modified'])) {
            // Validate the cache
            if (!isset($options['cache']['no-store']) && $this->notModifiedSince($options['modified'])) {
                return true;
            }
            
            $response->setHeader('Last-Modified', gmdate('r', $options['modified']), true);
        }

// Set the content disposition
        if (isset($options['disposition']) && $options['disposition'] == 'inline') {
            $disposition = 'inline';
        } else {
            $disposition = 'attachment';
        }
        
        $response->setHttpResponseCode(200);
        $response->setHeader('Content-Type', $type, true);
        $response->setHeader('Content-Disposition', $disposition . '; filename="' . $filename . '"', true);
        $response->setHeader('Content-Length', strlen($data), true);
        $response->setBody($data);
    }

/**
* Proxy method for sendFile
*
* @param string $path Path to the file
* @param string $type The mime-type of the file
* @param array $options
* @return bool Whether the headers and file were sent
*/
    public function direct($path, $type, $options = array())
    {
        return $this->sendFile($path, $type, $options);
    }
}

Editing: SendFile.php

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