';
/**
* Retrieve data from external URL
*
* @param string $src: URL
* @param global $dest: can be a file ressource or string
* @return bool
*/
function fetchRemote($src, &$dest, $user_agent='Piwigo', $step=0)
{
// After 3 redirections, return false
if ($step > 3) return false;
// Initialize $dest
is_resource($dest) or $dest = '';
// Try curl to read remote file
if (function_exists('curl_init'))
{
$ch = @curl_init();
@curl_setopt($ch, CURLOPT_URL, $src);
@curl_setopt($ch, CURLOPT_HEADER, 1);
@curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
@curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$content = @curl_exec($ch);
$header_length = @curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$status = @curl_getinfo($ch, CURLINFO_HTTP_CODE);
@curl_close($ch);
if ($content !== false and $status >= 200 and $status < 400)
{
if (preg_match('/Location:\s+?(.+)/', substr($content, 0, $header_length), $m))
{
return fetchRemote($m[1], $dest, $user_agent, $step+1);
}
$content = substr($content, $header_length);
is_resource($dest) ? @fwrite($dest, $content) : $dest = $content;
return true;
}
}
// Try file_get_contents to read remote file
if (ini_get('allow_url_fopen'))
{
$content = @file_get_contents($src);
if ($content !== false)
{
is_resource($dest) ? @fwrite($dest, $content) : $dest = $content;
return true;
}
}
// Try fsockopen to read remote file
$src = parse_url($src);
$host = $src['host'];
$path = isset($src['path']) ? $src['path'] : '/';
$path .= isset($src['query']) ? '?'.$src['query'] : '';
if (($s = @fsockopen($host,80,$errno,$errstr,5)) === false)
{
return false;
}
fwrite($s,
"GET ".$path." HTTP/1.0\r\n"
."Host: ".$host."\r\n"
."User-Agent: ".$user_agent."\r\n"
."Accept: */*\r\n"
."\r\n"
);
$i = 0;
$in_content = false;
while (!feof($s))
{
$line = fgets($s);
if (rtrim($line,"\r\n") == '' && !$in_content)
{
$in_content = true;
$i++;
continue;
}
if ($i == 0)
{
if (!preg_match('/HTTP\/(\\d\\.\\d)\\s*(\\d+)\\s*(.*)/',rtrim($line,"\r\n"), $m))
{
fclose($s);
return false;
}
$status = (integer) $m[2];
if ($status < 200 || $status >= 400)
{
fclose($s);
return false;
}
}
if (!$in_content)
{
if (preg_match('/Location:\s+?(.+)$/',rtrim($line,"\r\n"),$m))
{
fclose($s);
return fetchRemote(trim($m[1]),$dest,$user_agent,$step+1);
}
$i++;
continue;
}
is_resource($dest) ? @fwrite($dest, $line) : $dest .= $line;
$i++;
}
fclose($s);
return true;
}
?>