/**
* Handles HTTP Redirects and follows them if appropriate.
*
* @since 3.7.0
*
* @static
*
* @param string $url The URL which was requested.
* @param array $args The Arguments which were used to make the request.
* @param array $response The Response of the HTTP request.
* @return false|object False if no redirect is present, a WP_HTTP or WP_Error result otherwise.
*/
public static function handle_redirects($url, $args, $response)
{
// If no redirects are present, or, redirects were not requested, perform no action.
if (!isset($response['headers']['location']) || 0 === $args['_redirection']) {
return false;
}
// Only perform redirections on redirection http codes.
if ($response['response']['code'] > 399 || $response['response']['code'] < 300) {
return false;
}
// Don't redirect if we've run out of redirects.
if ($args['redirection']-- <= 0) {
return new WP_Error('http_request_failed', __('Too many redirects.'));
}
$redirect_location = $response['headers']['location'];
// If there were multiple Location headers, use the last header specified.
if (is_array($redirect_location)) {
$redirect_location = array_pop($redirect_location);
}
$redirect_location = WP_Http::make_absolute_url($redirect_location, $url);
// POST requests should not POST to a redirected location.
if ('POST' == $args['method']) {
if (in_array($response['response']['code'], array(302, 303))) {
$args['method'] = 'GET';
}
}
// Include valid cookies in the redirect process.
if (!empty($response['cookies'])) {
foreach ($response['cookies'] as $cookie) {
if ($cookie->test($redirect_location)) {
$args['cookies'][] = $cookie;
}
}
}
return wp_remote_request($redirect_location, $args);
}
/**
* Send a HTTP request to a URI using cURL extension.
*
* @access public
* @since 2.7.0
*
* @param string $url The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public function request($url, $args = array())
{
$defaults = array('method' => 'GET', 'timeout' => 5, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => null, 'cookies' => array());
$r = wp_parse_args($args, $defaults);
if (isset($r['headers']['User-Agent'])) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} elseif (isset($r['headers']['user-agent'])) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set.
WP_Http::buildCookieHeader($r);
$handle = curl_init();
// cURL offers really easy proxy support.
$proxy = new WP_HTTP_Proxy();
if ($proxy->is_enabled() && $proxy->send_through_proxy($url)) {
curl_setopt($handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
curl_setopt($handle, CURLOPT_PROXY, $proxy->host());
curl_setopt($handle, CURLOPT_PROXYPORT, $proxy->port());
if ($proxy->use_authentication()) {
curl_setopt($handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
curl_setopt($handle, CURLOPT_PROXYUSERPWD, $proxy->authentication());
}
}
$is_local = isset($r['local']) && $r['local'];
$ssl_verify = isset($r['sslverify']) && $r['sslverify'];
if ($is_local) {
/** This filter is documented in wp-includes/class-wp-http-streams.php */
$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
} elseif (!$is_local) {
/** This filter is documented in wp-includes/class-wp-http-streams.php */
$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
}
/*
* CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since.
* a value of 0 will allow an unlimited timeout.
*/
$timeout = (int) ceil($r['timeout']);
curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($handle, CURLOPT_TIMEOUT, $timeout);
curl_setopt($handle, CURLOPT_URL, $url);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);
curl_setopt($handle, CURLOPT_SSL_VERIFYHOST, $ssl_verify === true ? 2 : false);
curl_setopt($handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify);
if ($ssl_verify) {
curl_setopt($handle, CURLOPT_CAINFO, $r['sslcertificates']);
}
curl_setopt($handle, CURLOPT_USERAGENT, $r['user-agent']);
/*
* The option doesn't work with safe mode or when open_basedir is set, and there's
* a bug #17490 with redirected POST requests, so handle redirections outside Curl.
*/
curl_setopt($handle, CURLOPT_FOLLOWLOCATION, false);
if (defined('CURLOPT_PROTOCOLS')) {
// PHP 5.2.10 / cURL 7.19.4
curl_setopt($handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
}
switch ($r['method']) {
case 'HEAD':
curl_setopt($handle, CURLOPT_NOBODY, true);
break;
case 'POST':
curl_setopt($handle, CURLOPT_POST, true);
curl_setopt($handle, CURLOPT_POSTFIELDS, $r['body']);
break;
case 'PUT':
curl_setopt($handle, CURLOPT_CUSTOMREQUEST, 'PUT');
curl_setopt($handle, CURLOPT_POSTFIELDS, $r['body']);
break;
default:
curl_setopt($handle, CURLOPT_CUSTOMREQUEST, $r['method']);
if (!is_null($r['body'])) {
curl_setopt($handle, CURLOPT_POSTFIELDS, $r['body']);
}
break;
}
if (true === $r['blocking']) {
curl_setopt($handle, CURLOPT_HEADERFUNCTION, array($this, 'stream_headers'));
curl_setopt($handle, CURLOPT_WRITEFUNCTION, array($this, 'stream_body'));
}
curl_setopt($handle, CURLOPT_HEADER, false);
if (isset($r['limit_response_size'])) {
$this->max_body_length = intval($r['limit_response_size']);
} else {
$this->max_body_length = false;
}
// If streaming to a file open a file handle, and setup our curl streaming handler.
if ($r['stream']) {
if (!WP_DEBUG) {
$this->stream_handle = @fopen($r['filename'], 'w+');
} else {
$this->stream_handle = fopen($r['filename'], 'w+');
}
if (!$this->stream_handle) {
return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $r['filename']));
}
} else {
$this->stream_handle = false;
}
if (!empty($r['headers'])) {
// cURL expects full header strings in each element.
$headers = array();
foreach ($r['headers'] as $name => $value) {
$headers[] = "{$name}: {$value}";
}
curl_setopt($handle, CURLOPT_HTTPHEADER, $headers);
}
if ($r['httpversion'] == '1.0') {
curl_setopt($handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
} else {
curl_setopt($handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
}
/**
* Fires before the cURL request is executed.
*
* Cookies are not currently handled by the HTTP API. This action allows
* plugins to handle cookies themselves.
*
* @since 2.8.0
*
* @param resource &$handle The cURL handle returned by curl_init().
* @param array $r The HTTP request arguments.
* @param string $url The request URL.
*/
do_action_ref_array('http_api_curl', array(&$handle, $r, $url));
// We don't need to return the body, so don't. Just execute request and return.
if (!$r['blocking']) {
curl_exec($handle);
if ($curl_error = curl_error($handle)) {
curl_close($handle);
return new WP_Error('http_request_failed', $curl_error);
}
if (in_array(curl_getinfo($handle, CURLINFO_HTTP_CODE), array(301, 302))) {
curl_close($handle);
return new WP_Error('http_request_failed', __('Too many redirects.'));
}
curl_close($handle);
return array('headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array());
}
curl_exec($handle);
$theHeaders = WP_Http::processHeaders($this->headers, $url);
$theBody = $this->body;
$bytes_written_total = $this->bytes_written_total;
$this->headers = '';
$this->body = '';
$this->bytes_written_total = 0;
$curl_error = curl_errno($handle);
// If an error occurred, or, no response.
if ($curl_error || 0 == strlen($theBody) && empty($theHeaders['headers'])) {
if (CURLE_WRITE_ERROR == $curl_error) {
if (!$this->max_body_length || $this->max_body_length != $bytes_written_total) {
if ($r['stream']) {
curl_close($handle);
fclose($this->stream_handle);
return new WP_Error('http_request_failed', __('Failed to write request to temporary file.'));
} else {
curl_close($handle);
return new WP_Error('http_request_failed', curl_error($handle));
}
}
} else {
if ($curl_error = curl_error($handle)) {
curl_close($handle);
return new WP_Error('http_request_failed', $curl_error);
}
}
if (in_array(curl_getinfo($handle, CURLINFO_HTTP_CODE), array(301, 302))) {
curl_close($handle);
return new WP_Error('http_request_failed', __('Too many redirects.'));
}
}
curl_close($handle);
if ($r['stream']) {
fclose($this->stream_handle);
}
$response = array('headers' => $theHeaders['headers'], 'body' => null, 'response' => $theHeaders['response'], 'cookies' => $theHeaders['cookies'], 'filename' => $r['filename']);
// Handle redirects.
if (false !== ($redirect_response = WP_HTTP::handle_redirects($url, $r, $response))) {
return $redirect_response;
}
if (true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers'])) {
$theBody = WP_Http_Encoding::decompress($theBody);
}
$response['body'] = $theBody;
return $response;
}