Subversion-Projekte lars-tiefland.php_share

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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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/**
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 * An example of Listener usage with HTTP_Request. This downloads and saves
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 * the file displaying the progress bar in the process.
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 *
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 * Note two things:
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 * 1) The file should be run in console, not in browser;
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 * 2) You should turn output buffering OFF for this to work properly.
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 *
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 * @category    HTTP
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 * @package     HTTP_Request
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 * @version     CVS: $Id: download-progress.php,v 1.4 2007/10/26 13:45:56 avb Exp $
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 * @ignore
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 */
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/**
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 * Class for performing HTTP requests
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 */
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require_once 'HTTP/Request.php';
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require_once 'HTTP/Request/Listener.php';
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require_once 'Console/ProgressBar.php';
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PEAR::setErrorHandling(PEAR_ERROR_DIE);
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set_time_limit(0);
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/**
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 * A Listener for HTTP_Request that draws download progress indicator
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 *
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 * @category    HTTP
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 * @package     HTTP_Request
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 * @ignore
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 */
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class HTTP_Request_DownloadListener extends HTTP_Request_Listener
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{
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   /**
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    * Handle for the target file
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    * @var int
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    */
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    var $_fp;
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   /**
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    * Console_ProgressBar instance used to display the indicator
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    * @var object
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    */
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    var $_bar;
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   /**
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    * Name of the target file
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    * @var string
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    */
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    var $_target;
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   /**
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    * Number of bytes received so far
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    * @var int
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    */
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    var $_size = 0;
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    function HTTP_Request_DownloadListener()
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    {
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        $this->HTTP_Request_Listener();
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    }
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   /**
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    * Opens the target file
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    * @param string Target file name
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    * @throws PEAR_Error
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    */
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    function setTarget($target)
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    {
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        $this->_target = $target;
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        $this->_fp = @fopen($target, 'wb');
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        if (!$this->_fp) {
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            PEAR::raiseError("Cannot open '{$target}'");
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        }
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    }
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    function update(&$subject, $event, $data = null)
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    {
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        switch ($event) {
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            case 'sentRequest':
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                $this->_target = basename($subject->_url->path);
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                break;
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            case 'gotHeaders':
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                if (isset($data['content-disposition']) &&
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                    preg_match('/filename="([^"]+)"/', $data['content-disposition'], $matches)) {
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                    $this->setTarget(basename($matches[1]));
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                } else {
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                    $this->setTarget($this->_target);
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                }
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                $this->_bar =& new Console_ProgressBar(
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                    '* ' . $this->_target . ' %fraction% KB [%bar%] %percent%', '=>', '-',
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                    79, (isset($data['content-length'])? round($data['content-length'] / 1024): 100)
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                );
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                $this->_size = 0;
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                break;
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            case 'tick':
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                $this->_size += strlen($data);
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                $this->_bar->update(round($this->_size / 1024));
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                fwrite($this->_fp, $data);
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                break;
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            case 'gotBody':
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                fclose($this->_fp);
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                break;
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            case 'connect':
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            case 'disconnect':
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                break;
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            default:
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                PEAR::raiseError("Unhandled event '{$event}'");
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        } // switch
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    }
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}
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// Try using any other package if you like, but choose the bigger ones
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// to be able to see the progress bar
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$url = 'http://pear.php.net/get/HTML_QuickForm-stable';
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$req =& new HTTP_Request($url);
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$download =& new HTTP_Request_DownloadListener();
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$req->attach($download);
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$req->sendRequest(false);
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?>