452 lines
13 KiB
PHP
452 lines
13 KiB
PHP
<?php
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/**
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* fsockopen HTTP transport
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*
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* @package Requests
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* @subpackage Transport
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*/
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/**
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* fsockopen HTTP transport
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*
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* @package Requests
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* @subpackage Transport
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*/
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class Requests_Transport_fsockopen implements Requests_Transport {
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/**
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* Second to microsecond conversion
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*
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* @var integer
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*/
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const SECOND_IN_MICROSECONDS = 1000000;
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/**
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* Raw HTTP data
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*
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* @var string
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*/
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public $headers = '';
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/**
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* Stream metadata
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*
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* @var array Associative array of properties, see {@see https://secure.php.net/stream_get_meta_data}
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*/
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public $info;
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/**
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* What's the maximum number of bytes we should keep?
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*
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* @var int|bool Byte count, or false if no limit.
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*/
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protected $max_bytes = false;
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protected $connect_error = '';
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/**
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* Perform a request
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*
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* @throws Requests_Exception On failure to connect to socket (`fsockopenerror`)
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* @throws Requests_Exception On socket timeout (`timeout`)
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*
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* @param string $url URL to request
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* @param array $headers Associative array of request headers
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* @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD
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* @param array $options Request options, see {@see Requests::response()} for documentation
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* @return string Raw HTTP result
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*/
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public function request($url, $headers = array(), $data = array(), $options = array()) {
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$options['hooks']->dispatch('fsockopen.before_request');
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$url_parts = parse_url($url);
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if (empty($url_parts)) {
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throw new Requests_Exception('Invalid URL.', 'invalidurl', $url);
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}
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$host = $url_parts['host'];
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$context = stream_context_create();
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$verifyname = false;
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$case_insensitive_headers = new Requests_Utility_CaseInsensitiveDictionary($headers);
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// HTTPS support
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if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https') {
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$remote_socket = 'ssl://' . $host;
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if (!isset($url_parts['port'])) {
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$url_parts['port'] = 443;
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}
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$context_options = array(
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'verify_peer' => true,
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'capture_peer_cert' => true,
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);
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$verifyname = true;
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// SNI, if enabled (OpenSSL >=0.9.8j)
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// phpcs:ignore PHPCompatibility.Constants.NewConstants.openssl_tlsext_server_nameFound
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if (defined('OPENSSL_TLSEXT_SERVER_NAME') && OPENSSL_TLSEXT_SERVER_NAME) {
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$context_options['SNI_enabled'] = true;
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if (isset($options['verifyname']) && $options['verifyname'] === false) {
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$context_options['SNI_enabled'] = false;
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}
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}
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if (isset($options['verify'])) {
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if ($options['verify'] === false) {
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$context_options['verify_peer'] = false;
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$context_options['verify_peer_name'] = false;
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$verifyname = false;
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}
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elseif (is_string($options['verify'])) {
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$context_options['cafile'] = $options['verify'];
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}
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}
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if (isset($options['verifyname']) && $options['verifyname'] === false) {
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$context_options['verify_peer_name'] = false;
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$verifyname = false;
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}
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stream_context_set_option($context, array('ssl' => $context_options));
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}
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else {
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$remote_socket = 'tcp://' . $host;
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}
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$this->max_bytes = $options['max_bytes'];
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if (!isset($url_parts['port'])) {
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$url_parts['port'] = 80;
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}
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$remote_socket .= ':' . $url_parts['port'];
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// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_set_error_handler
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set_error_handler(array($this, 'connect_error_handler'), E_WARNING | E_NOTICE);
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$options['hooks']->dispatch('fsockopen.remote_socket', array(&$remote_socket));
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$socket = stream_socket_client($remote_socket, $errno, $errstr, ceil($options['connect_timeout']), STREAM_CLIENT_CONNECT, $context);
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restore_error_handler();
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if ($verifyname && !$this->verify_certificate_from_context($host, $context)) {
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throw new Requests_Exception('SSL certificate did not match the requested domain name', 'ssl.no_match');
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}
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if (!$socket) {
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if ($errno === 0) {
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// Connection issue
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throw new Requests_Exception(rtrim($this->connect_error), 'fsockopen.connect_error');
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}
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throw new Requests_Exception($errstr, 'fsockopenerror', null, $errno);
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}
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$data_format = $options['data_format'];
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if ($data_format === 'query') {
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$path = self::format_get($url_parts, $data);
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$data = '';
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}
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else {
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$path = self::format_get($url_parts, array());
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}
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$options['hooks']->dispatch('fsockopen.remote_host_path', array(&$path, $url));
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$request_body = '';
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$out = sprintf("%s %s HTTP/%.1F\r\n", $options['type'], $path, $options['protocol_version']);
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if ($options['type'] !== Requests::TRACE) {
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if (is_array($data)) {
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$request_body = http_build_query($data, '', '&');
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}
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else {
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$request_body = $data;
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}
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// Always include Content-length on POST requests to prevent
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// 411 errors from some servers when the body is empty.
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if (!empty($data) || $options['type'] === Requests::POST) {
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if (!isset($case_insensitive_headers['Content-Length'])) {
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$headers['Content-Length'] = strlen($request_body);
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}
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if (!isset($case_insensitive_headers['Content-Type'])) {
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$headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
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}
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}
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}
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if (!isset($case_insensitive_headers['Host'])) {
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$out .= sprintf('Host: %s', $url_parts['host']);
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if ((strtolower($url_parts['scheme']) === 'http' && $url_parts['port'] !== 80) || (strtolower($url_parts['scheme']) === 'https' && $url_parts['port'] !== 443)) {
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$out .= ':' . $url_parts['port'];
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}
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$out .= "\r\n";
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}
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if (!isset($case_insensitive_headers['User-Agent'])) {
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$out .= sprintf("User-Agent: %s\r\n", $options['useragent']);
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}
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$accept_encoding = $this->accept_encoding();
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if (!isset($case_insensitive_headers['Accept-Encoding']) && !empty($accept_encoding)) {
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$out .= sprintf("Accept-Encoding: %s\r\n", $accept_encoding);
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}
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$headers = Requests::flatten($headers);
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if (!empty($headers)) {
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$out .= implode("\r\n", $headers) . "\r\n";
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}
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$options['hooks']->dispatch('fsockopen.after_headers', array(&$out));
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if (substr($out, -2) !== "\r\n") {
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$out .= "\r\n";
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}
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if (!isset($case_insensitive_headers['Connection'])) {
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$out .= "Connection: Close\r\n";
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}
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$out .= "\r\n" . $request_body;
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$options['hooks']->dispatch('fsockopen.before_send', array(&$out));
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fwrite($socket, $out);
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$options['hooks']->dispatch('fsockopen.after_send', array($out));
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if (!$options['blocking']) {
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fclose($socket);
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$fake_headers = '';
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$options['hooks']->dispatch('fsockopen.after_request', array(&$fake_headers));
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return '';
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}
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$timeout_sec = (int) floor($options['timeout']);
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if ($timeout_sec === $options['timeout']) {
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$timeout_msec = 0;
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}
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else {
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$timeout_msec = self::SECOND_IN_MICROSECONDS * $options['timeout'] % self::SECOND_IN_MICROSECONDS;
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}
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stream_set_timeout($socket, $timeout_sec, $timeout_msec);
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$response = '';
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$body = '';
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$headers = '';
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$this->info = stream_get_meta_data($socket);
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$size = 0;
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$doingbody = false;
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$download = false;
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if ($options['filename']) {
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$download = fopen($options['filename'], 'wb');
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}
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while (!feof($socket)) {
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$this->info = stream_get_meta_data($socket);
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if ($this->info['timed_out']) {
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throw new Requests_Exception('fsocket timed out', 'timeout');
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}
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$block = fread($socket, Requests::BUFFER_SIZE);
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if (!$doingbody) {
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$response .= $block;
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if (strpos($response, "\r\n\r\n")) {
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list($headers, $block) = explode("\r\n\r\n", $response, 2);
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$doingbody = true;
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}
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}
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// Are we in body mode now?
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if ($doingbody) {
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$options['hooks']->dispatch('request.progress', array($block, $size, $this->max_bytes));
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$data_length = strlen($block);
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if ($this->max_bytes) {
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// Have we already hit a limit?
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if ($size === $this->max_bytes) {
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continue;
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}
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if (($size + $data_length) > $this->max_bytes) {
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// Limit the length
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$limited_length = ($this->max_bytes - $size);
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$block = substr($block, 0, $limited_length);
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}
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}
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$size += strlen($block);
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if ($download) {
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fwrite($download, $block);
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}
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else {
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$body .= $block;
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}
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}
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}
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$this->headers = $headers;
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if ($download) {
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fclose($download);
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}
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else {
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$this->headers .= "\r\n\r\n" . $body;
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}
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fclose($socket);
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$options['hooks']->dispatch('fsockopen.after_request', array(&$this->headers, &$this->info));
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return $this->headers;
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}
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/**
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* Send multiple requests simultaneously
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*
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* @param array $requests Request data (array of 'url', 'headers', 'data', 'options') as per {@see Requests_Transport::request}
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* @param array $options Global options, see {@see Requests::response()} for documentation
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* @return array Array of Requests_Response objects (may contain Requests_Exception or string responses as well)
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*/
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public function request_multiple($requests, $options) {
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$responses = array();
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$class = get_class($this);
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foreach ($requests as $id => $request) {
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try {
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$handler = new $class();
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$responses[$id] = $handler->request($request['url'], $request['headers'], $request['data'], $request['options']);
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$request['options']['hooks']->dispatch('transport.internal.parse_response', array(&$responses[$id], $request));
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}
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catch (Requests_Exception $e) {
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$responses[$id] = $e;
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}
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if (!is_string($responses[$id])) {
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$request['options']['hooks']->dispatch('multiple.request.complete', array(&$responses[$id], $id));
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}
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}
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return $responses;
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}
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/**
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* Retrieve the encodings we can accept
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*
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* @return string Accept-Encoding header value
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*/
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protected static function accept_encoding() {
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$type = array();
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if (function_exists('gzinflate')) {
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$type[] = 'deflate;q=1.0';
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}
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if (function_exists('gzuncompress')) {
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$type[] = 'compress;q=0.5';
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}
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$type[] = 'gzip;q=0.5';
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return implode(', ', $type);
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}
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/**
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* Format a URL given GET data
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*
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* @param array $url_parts
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* @param array|object $data Data to build query using, see {@see https://secure.php.net/http_build_query}
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* @return string URL with data
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*/
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protected static function format_get($url_parts, $data) {
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if (!empty($data)) {
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if (empty($url_parts['query'])) {
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$url_parts['query'] = '';
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}
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$url_parts['query'] .= '&' . http_build_query($data, '', '&');
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$url_parts['query'] = trim($url_parts['query'], '&');
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}
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if (isset($url_parts['path'])) {
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if (isset($url_parts['query'])) {
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$get = $url_parts['path'] . '?' . $url_parts['query'];
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}
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else {
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$get = $url_parts['path'];
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}
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}
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else {
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$get = '/';
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}
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return $get;
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}
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/**
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* Error handler for stream_socket_client()
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*
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* @param int $errno Error number (e.g. E_WARNING)
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* @param string $errstr Error message
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*/
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public function connect_error_handler($errno, $errstr) {
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// Double-check we can handle it
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if (($errno & E_WARNING) === 0 && ($errno & E_NOTICE) === 0) {
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// Return false to indicate the default error handler should engage
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return false;
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}
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$this->connect_error .= $errstr . "\n";
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return true;
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}
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/**
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* Verify the certificate against common name and subject alternative names
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*
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* Unfortunately, PHP doesn't check the certificate against the alternative
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* names, leading things like 'https://www.github.com/' to be invalid.
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* Instead
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*
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* @see https://tools.ietf.org/html/rfc2818#section-3.1 RFC2818, Section 3.1
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*
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* @throws Requests_Exception On failure to connect via TLS (`fsockopen.ssl.connect_error`)
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* @throws Requests_Exception On not obtaining a match for the host (`fsockopen.ssl.no_match`)
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* @param string $host Host name to verify against
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* @param resource $context Stream context
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* @return bool
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*/
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public function verify_certificate_from_context($host, $context) {
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$meta = stream_context_get_options($context);
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// If we don't have SSL options, then we couldn't make the connection at
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// all
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if (empty($meta) || empty($meta['ssl']) || empty($meta['ssl']['peer_certificate'])) {
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throw new Requests_Exception(rtrim($this->connect_error), 'ssl.connect_error');
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}
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$cert = openssl_x509_parse($meta['ssl']['peer_certificate']);
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return Requests_SSL::verify_certificate($host, $cert);
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}
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/**
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* Whether this transport is valid
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*
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* @codeCoverageIgnore
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* @return boolean True if the transport is valid, false otherwise.
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*/
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public static function test($capabilities = array()) {
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if (!function_exists('fsockopen')) {
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return false;
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}
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// If needed, check that streams support SSL
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if (isset($capabilities['ssl']) && $capabilities['ssl']) {
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if (!extension_loaded('openssl') || !function_exists('openssl_x509_parse')) {
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return false;
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}
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// Currently broken, thanks to https://github.com/facebook/hhvm/issues/2156
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if (defined('HHVM_VERSION')) {
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return false;
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}
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}
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return true;
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}
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}
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