Viewing file:  download-progress.php (3.38 KB) -rw-r--r--
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<?php
/**
* An example of Listener usage with HTTP_Request. This downloads and saves
* the file displaying the progress bar in the process.
*
* Note two things:
* 1) The file should be run in console, not in browser;
* 2) You should turn output buffering OFF for this to work properly.
*
* @category HTTP
* @package HTTP_Request
* @version CVS: $Id: download-progress.php,v 1.4 2007/10/26 13:45:56 avb Exp $
* @ignore
*/
/**
* Class for performing HTTP requests
*/
require_once 'HTTP/Request.php';
require_once 'HTTP/Request/Listener.php';
require_once 'Console/ProgressBar.php';
PEAR::setErrorHandling(PEAR_ERROR_DIE);
set_time_limit(0);
/**
* A Listener for HTTP_Request that draws download progress indicator
*
* @category HTTP
* @package HTTP_Request
* @ignore
*/
class HTTP_Request_DownloadListener extends HTTP_Request_Listener
{
/**
* Handle for the target file
* @var int
*/
var $_fp;
/**
* Console_ProgressBar instance used to display the indicator
* @var object
*/
var $_bar;
/**
* Name of the target file
* @var string
*/
var $_target;
/**
* Number of bytes received so far
* @var int
*/
var $_size = 0;
function HTTP_Request_DownloadListener()
{
$this->HTTP_Request_Listener();
}
/**
* Opens the target file
* @param string Target file name
* @throws PEAR_Error
*/
function setTarget($target)
{
$this->_target = $target;
$this->_fp = @fopen($target, 'wb');
if (!$this->_fp) {
PEAR::raiseError("Cannot open '{$target}'");
}
}
function update(&$subject, $event, $data = null)
{
switch ($event) {
case 'sentRequest':
$this->_target = basename($subject->_url->path);
break;
case 'gotHeaders':
if (isset($data['content-disposition']) &&
preg_match('/filename="([^"]+)"/', $data['content-disposition'], $matches)) {
$this->setTarget(basename($matches[1]));
} else {
$this->setTarget($this->_target);
}
$this->_bar =& new Console_ProgressBar(
'* ' . $this->_target . ' %fraction% KB [%bar%] %percent%', '=>', '-',
79, (isset($data['content-length'])? round($data['content-length'] / 1024): 100)
);
$this->_size = 0;
break;
case 'tick':
$this->_size += strlen($data);
$this->_bar->update(round($this->_size / 1024));
fwrite($this->_fp, $data);
break;
case 'gotBody':
fclose($this->_fp);
break;
case 'connect':
case 'disconnect':
break;
default:
PEAR::raiseError("Unhandled event '{$event}'");
} // switch
}
}
// Try using any other package if you like, but choose the bigger ones
// to be able to see the progress bar
$url = 'http://pear.php.net/get/HTML_QuickForm-stable';
$req =& new HTTP_Request($url);
$download =& new HTTP_Request_DownloadListener();
$req->attach($download);
$req->sendRequest(false);
?>
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