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<?php
/**
* fsockopen HTTP transport
*
* @package Requests
* @subpackage Transport
*/
/**
* fsockopen HTTP transport
*
* @package Requests
* @subpackage Transport
*/
class Requests_Transport_fsockopen implements Requests_Transport {
/**
* Second to microsecond conversion
*
* @var integer
*/
const SECOND_IN_MICROSECONDS = 1000000;
/**
* Raw HTTP data
*
* @var string
*/
public $headers = '';
/**
* Stream metadata
*
* @var array Associative array of properties, see {@see https://secure.php.net/stream_get_meta_data}
*/
public $info;
/**
* What's the maximum number of bytes we should keep?
*
* @var int|bool Byte count, or false if no limit.
*/
protected $max_bytes = false;
protected $connect_error = '';
/**
* Perform a request
*
* @throws Requests_Exception On failure to connect to socket (`fsockopenerror`)
* @throws Requests_Exception On socket timeout (`timeout`)
*
* @param string $url URL to request
* @param array $headers Associative array of request headers
* @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
* @param array $options Request options, see {@see Requests::response()} for documentation
* @return string Raw HTTP result
*/
public function request($url, $headers = array(), $data = array(), $options = array()) {
$options['hooks']->dispatch('fsockopen.before_request');
$url_parts = parse_url($url);
if (empty($url_parts)) {
throw new Requests_Exception('Invalid URL.', 'invalidurl', $url);
}
$host = $url_parts['host'];
$context = stream_context_create();
$verifyname = false;
$case_insensitive_headers = new Requests_Utility_CaseInsensitiveDictionary($headers);
// HTTPS support
if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https') {
$remote_socket = 'ssl://' . $host;
if (!isset($url_parts['port'])) {
$url_parts['port'] = 443;
}
$context_options = array(
'verify_peer' => true,
// 'CN_match' => $host,
'capture_peer_cert' => true
);
$verifyname = true;
// SNI, if enabled (OpenSSL >=0.9.8j)
if (defined('OPENSSL_TLSEXT_SERVER_NAME') && OPENSSL_TLSEXT_SERVER_NAME) {
$context_options['SNI_enabled'] = true;
if (isset($options['verifyname']) && $options['verifyname'] === false) {
$context_options['SNI_enabled'] = false;
}
}
if (isset($options['verify'])) {
if ($options['verify'] === false) {
$context_options['verify_peer'] = false;
}
elseif (is_string($options['verify'])) {
$context_options['cafile'] = $options['verify'];
}
}
if (isset($options['verifyname']) && $options['verifyname'] === false) {
$context_options['verify_peer_name'] = false;
$verifyname = false;
}
stream_context_set_option($context, array('ssl' => $context_options));
}
else {
$remote_socket = 'tcp://' . $host;
}
$this->max_bytes = $options['max_bytes'];
if (!isset($url_parts['port'])) {
$url_parts['port'] = 80;
}
$remote_socket .= ':' . $url_parts['port'];
set_error_handler(array($this, 'connect_error_handler'), E_WARNING | E_NOTICE);
$options['hooks']->dispatch('fsockopen.remote_socket', array(&$remote_socket));
$socket = stream_socket_client($remote_socket, $errno, $errstr, ceil($options['connect_timeout']), STREAM_CLIENT_CONNECT, $context);
restore_error_handler();
if ($verifyname && !$this->verify_certificate_from_context($host, $context)) {
throw new Requests_Exception('SSL certificate did not match the requested domain name', 'ssl.no_match');
}
if (!$socket) {
if ($errno === 0) {
// Connection issue
throw new Requests_Exception(rtrim($this->connect_error), 'fsockopen.connect_error');
}
throw new Requests_Exception($errstr, 'fsockopenerror', null, $errno);
}
$data_format = $options['data_format'];
if ($data_format === 'query') {
$path = self::format_get($url_parts, $data);
$data = '';
}
else {
$path = self::format_get($url_parts, array());
}
$options['hooks']->dispatch('fsockopen.remote_host_path', array(&$path, $url));
$request_body = '';
$out = sprintf("%s %s HTTP/%.1f\r\n", $options['type'], $path, $options['protocol_version']);
if ($options['type'] !== Requests::TRACE) {
if (is_array($data)) {
$request_body = http_build_query($data, null, '&');
}
else {
$request_body = $data;
}
if (!empty($data)) {
if (!isset($case_insensitive_headers['Content-Length'])) {
$headers['Content-Length'] = strlen($request_body);
}
if (!isset($case_insensitive_headers['Content-Type'])) {
$headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
}
}
}
if (!isset($case_insensitive_headers['Host'])) {
$out .= sprintf('Host: %s', $url_parts['host']);
if (( 'http' === strtolower($url_parts['scheme']) && $url_parts['port'] !== 80 ) || ( 'https' === strtolower($url_parts['scheme']) && $url_parts['port'] !== 443 )) {
$out .= ':' . $url_parts['port'];
}
$out .= "\r\n";
}
if (!isset($case_insensitive_headers['User-Agent'])) {
$out .= sprintf("User-Agent: %s\r\n", $options['useragent']);
}
$accept_encoding = $this->accept_encoding();
if (!isset($case_insensitive_headers['Accept-Encoding']) && !empty($accept_encoding)) {
$out .= sprintf("Accept-Encoding: %s\r\n", $accept_encoding);
}
$headers = Requests::flatten($headers);
if (!empty($headers)) {
$out .= implode($headers, "\r\n") . "\r\n";
}
$options['hooks']->dispatch('fsockopen.after_headers', array(&$out));
if (substr($out, -2) !== "\r\n") {
$out .= "\r\n";
}
if (!isset($case_insensitive_headers['Connection'])) {
$out .= "Connection: Close\r\n";
}
$out .= "\r\n" . $request_body;
$options['hooks']->dispatch('fsockopen.before_send', array(&$out));
fwrite($socket, $out);
$options['hooks']->dispatch('fsockopen.after_send', array($out));
if (!$options['blocking']) {
fclose($socket);
$fake_headers = '';
$options['hooks']->dispatch('fsockopen.after_request', array(&$fake_headers));
return '';
}
$timeout_sec = (int) floor($options['timeout']);
if ($timeout_sec == $options['timeout']) {
$timeout_msec = 0;
}
else {
$timeout_msec = self::SECOND_IN_MICROSECONDS * $options['timeout'] % self::SECOND_IN_MICROSECONDS;
}
stream_set_timeout($socket, $timeout_sec, $timeout_msec);
$response = $body = $headers = '';
$this->info = stream_get_meta_data($socket);
$size = 0;
$doingbody = false;
$download = false;
if ($options['filename']) {
$download = fopen($options['filename'], 'wb');
}
while (!feof($socket)) {
$this->info = stream_get_meta_data($socket);
if ($this->info['timed_out']) {
throw new Requests_Exception('fsocket timed out', 'timeout');
}
$block = fread($socket, Requests::BUFFER_SIZE);
if (!$doingbody) {
$response .= $block;
if (strpos($response, "\r\n\r\n")) {
list($headers, $block) = explode("\r\n\r\n", $response, 2);
$doingbody = true;
}
}
// Are we in body mode now?
if ($doingbody) {
$options['hooks']->dispatch('request.progress', array($block, $size, $this->max_bytes));
$data_length = strlen($block);
if ($this->max_bytes) {
// Have we already hit a limit?
if ($size === $this->max_bytes) {
continue;
}
if (($size + $data_length) > $this->max_bytes) {
// Limit the length
$limited_length = ($this->max_bytes - $size);
$block = substr($block, 0, $limited_length);
}
}
$size += strlen($block);
if ($download) {
fwrite($download, $block);
}
else {
$body .= $block;
}
}
}
$this->headers = $headers;
if ($download) {
fclose($download);
}
else {
$this->headers .= "\r\n\r\n" . $body;
}
fclose($socket);
$options['hooks']->dispatch('fsockopen.after_request', array(&$this->headers, &$this->info));
return $this->headers;
}
/**
* Send multiple requests simultaneously
*
* @param array $requests Request data (array of 'url', 'headers', 'data', 'options') as per {@see Requests_Transport::request}
* @param array $options Global options, see {@see Requests::response()} for documentation
* @return array Array of Requests_Response objects (may contain Requests_Exception or string responses as well)
*/
public function request_multiple($requests, $options) {
$responses = array();
$class = get_class($this);
foreach ($requests as $id => $request) {
try {
$handler = new $class();
$responses[$id] = $handler->request($request['url'], $request['headers'], $request['data'], $request['options']);
$request['options']['hooks']->dispatch('transport.internal.parse_response', array(&$responses[$id], $request));
}
catch (Requests_Exception $e) {
$responses[$id] = $e;
}
if (!is_string($responses[$id])) {
$request['options']['hooks']->dispatch('multiple.request.complete', array(&$responses[$id], $id));
}
}
return $responses;
}
/**
* Retrieve the encodings we can accept
*
* @return string Accept-Encoding header value
*/
protected static function accept_encoding() {
$type = array();
if (function_exists('gzinflate')) {
$type[] = 'deflate;q=1.0';
}
if (function_exists('gzuncompress')) {
$type[] = 'compress;q=0.5';
}
$type[] = 'gzip;q=0.5';
return implode(', ', $type);
}
/**
* Format a URL given GET data
*
* @param array $url_parts
* @param array|object $data Data to build query using, see {@see https://secure.php.net/http_build_query}
* @return string URL with data
*/
protected static function format_get($url_parts, $data) {
if (!empty($data)) {
if (empty($url_parts['query'])) {
$url_parts['query'] = '';
}
$url_parts['query'] .= '&' . http_build_query($data, null, '&');
$url_parts['query'] = trim($url_parts['query'], '&');
}
if (isset($url_parts['path'])) {
if (isset($url_parts['query'])) {
$get = $url_parts['path'] . '?' . $url_parts['query'];
}
else {
$get = $url_parts['path'];
}
}
else {
$get = '/';
}
return $get;
}
/**
* Error handler for stream_socket_client()
*
* @param int $errno Error number (e.g. E_WARNING)
* @param string $errstr Error message
*/
public function connect_error_handler($errno, $errstr) {
// Double-check we can handle it
if (($errno & E_WARNING) === 0 && ($errno & E_NOTICE) === 0) {
// Return false to indicate the default error handler should engage
return false;
}
$this->connect_error .= $errstr . "\n";
return true;
}
/**
* Verify the certificate against common name and subject alternative names
*
* Unfortunately, PHP doesn't check the certificate against the alternative
* names, leading things like 'https://www.github.com/' to be invalid.
* Instead
*
* @see https://tools.ietf.org/html/rfc2818#section-3.1 RFC2818, Section 3.1
*
* @throws Requests_Exception On failure to connect via TLS (`fsockopen.ssl.connect_error`)
* @throws Requests_Exception On not obtaining a match for the host (`fsockopen.ssl.no_match`)
* @param string $host Host name to verify against
* @param resource $context Stream context
* @return bool
*/
public function verify_certificate_from_context($host, $context) {
$meta = stream_context_get_options($context);
// If we don't have SSL options, then we couldn't make the connection at
// all
if (empty($meta) || empty($meta['ssl']) || empty($meta['ssl']['peer_certificate'])) {
throw new Requests_Exception(rtrim($this->connect_error), 'ssl.connect_error');
}
$cert = openssl_x509_parse($meta['ssl']['peer_certificate']);
return Requests_SSL::verify_certificate($host, $cert);
}
/**
* Whether this transport is valid
*
* @codeCoverageIgnore
* @return boolean True if the transport is valid, false otherwise.
*/
public static function test($capabilities = array()) {
if (!function_exists('fsockopen')) {
return false;
}
// If needed, check that streams support SSL
if (isset($capabilities['ssl']) && $capabilities['ssl']) {
if (!extension_loaded('openssl') || !function_exists('openssl_x509_parse')) {
return false;
}
// Currently broken, thanks to https://github.com/facebook/hhvm/issues/2156
if (defined('HHVM_VERSION')) {
return false;
}
}
return true;
}
}