/**
* Purge URI
*
* @param string $uri
* @return boolean
*/
function purge($uri)
{
require_once W3TC_INC_DIR . '/functions/http.php';
@set_time_limit($this->_timeout);
if (strpos($uri, '/') !== 0) {
$uri = '/' . $uri;
}
foreach ((array) $this->_servers as $server) {
$url = sprintf('http://%s%s', $server, $uri);
$response = w3_http_request($url, array('method' => 'PURGE'));
if (is_nxt_error($response)) {
$this->_log($url, sprintf('Unable to send request: %s.', implode('; ', $response->get_error_messages())));
return false;
}
if ($response['response']['code'] !== 200) {
$this->_log($url, 'Bad response code.');
return false;
}
$this->_log($url, 'OK');
}
return true;
}
/**
* Send PURGE request to Varnish server
*
* @param string $url
* @param string $auth
* $param boolean $check_status
* @param bool $check_status
* @return string
*/
function w3_http_purge($url, $auth = '', $check_status = true)
{
return w3_http_request('PURGE', $url, null, $auth, $check_status);
}
/**
* Sends HTTP GET request
*
* @param string $url
* @param array $args
* @return array|WP_Error
*/
function w3_http_get($url, $args = array())
{
$args = array_merge($args, array('method' => 'GET'));
return w3_http_request($url, $args);
}
function _request($varnish_server, $url)
{
$parse_url = @parse_url($url);
if (!$parse_url || !isset($parse_url['host'])) {
return new WP_Error('http_request_failed', 'Unrecognized URL format ' . $url);
}
$host = $parse_url['host'];
$port = isset($parse_url['port']) ? (int) $parse_url['port'] : 80;
$path = !empty($parse_url['path']) ? $parse_url['path'] : '/';
$query = isset($parse_url['query']) ? $parse_url['query'] : '';
$request_uri = $path . ($query != '' ? '?' . $query : '');
if (strpos($varnish_server, ':')) {
list($varnish_host, $varnish_port) = explode(':', $varnish_server);
} else {
$varnish_host = $varnish_server;
$varnish_port = 80;
}
// if url host is the same as varnish server - we can use regular
// wordpress http infrastructure, otherwise custom request should be
// sent using fsockopen, since we send request to other server than
// specified by $url
if ($host == $varnish_host && $port == $varnish_port) {
return w3_http_request($url, array('method' => 'PURGE'));
}
$request_headers_array = array(sprintf('PURGE %s HTTP/1.1', $request_uri), sprintf('Host: %s', $host), sprintf('User-Agent: %s', W3TC_POWERED_BY), 'Connection: close');
$request_headers = implode("\r\n", $request_headers_array);
$request = $request_headers . "\r\n\r\n";
// log what we are about to do
$this->_log($url, sprintf('Connecting to %s ...', $varnish_host));
$this->_log($url, sprintf('PURGE %s HTTP/1.1', $request_uri));
$this->_log($url, sprintf('Host: %s', $host));
$errno = null;
$errstr = null;
$fp = @fsockopen($varnish_host, $varnish_port, $errno, $errstr, 10);
if (!$fp) {
return new WP_Error('http_request_failed', $errno . ': ' . $errstr);
}
@stream_set_timeout($fp, 60);
@fputs($fp, $request);
$response = '';
while (!@feof($fp)) {
$response .= @fgets($fp, 4096);
}
@fclose($fp);
list($response_headers, $contents) = explode("\r\n\r\n", $response, 2);
$matches = null;
if (preg_match('~^HTTP/1.[01] (\\d+)~', $response_headers, $matches)) {
$status = (int) $matches[1];
$return = array('response' => array('code' => $status));
return $return;
}
return new WP_Error('http_request_failed', 'Unrecognized response header' . $response_headers);
}