1002 lines
30 KiB
PHP
Executable File
1002 lines
30 KiB
PHP
Executable File
<?php
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/**
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* Requests for PHP
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*
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* Inspired by Requests for Python.
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*
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* Based on concepts from SimplePie_File, RequestCore and WP_Http.
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*
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* @package Requests
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*/
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/**
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* Requests for PHP
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*
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* Inspired by Requests for Python.
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*
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* Based on concepts from SimplePie_File, RequestCore and WP_Http.
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*
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* @package Requests
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*/
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class Requests {
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/**
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* POST method
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*
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* @var string
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*/
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const POST = 'POST';
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/**
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* PUT method
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*
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* @var string
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*/
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const PUT = 'PUT';
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/**
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* GET method
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*
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* @var string
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*/
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const GET = 'GET';
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/**
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* HEAD method
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*
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* @var string
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*/
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const HEAD = 'HEAD';
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/**
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* DELETE method
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*
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* @var string
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*/
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const DELETE = 'DELETE';
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/**
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* OPTIONS method
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*
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* @var string
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*/
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const OPTIONS = 'OPTIONS';
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/**
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* TRACE method
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*
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* @var string
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*/
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const TRACE = 'TRACE';
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/**
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* PATCH method
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*
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* @link https://tools.ietf.org/html/rfc5789
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* @var string
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*/
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const PATCH = 'PATCH';
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/**
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* Default size of buffer size to read streams
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*
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* @var integer
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*/
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const BUFFER_SIZE = 1160;
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/**
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* Current version of Requests
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*
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* @var string
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*/
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const VERSION = '1.8.1';
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/**
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* Registered transport classes
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*
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* @var array
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*/
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protected static $transports = array();
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/**
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* Selected transport name
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*
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* Use {@see get_transport()} instead
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*
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* @var array
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*/
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public static $transport = array();
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/**
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* Default certificate path.
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*
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* @see Requests::get_certificate_path()
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* @see Requests::set_certificate_path()
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*
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* @var string
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*/
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protected static $certificate_path;
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/**
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* This is a static class, do not instantiate it
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*
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* @codeCoverageIgnore
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*/
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private function __construct() {}
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/**
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* Autoloader for Requests
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*
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* Register this with {@see register_autoloader()} if you'd like to avoid
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* having to create your own.
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*
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* (You can also use `spl_autoload_register` directly if you'd prefer.)
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*
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* @codeCoverageIgnore
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*
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* @param string $class Class name to load
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*/
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public static function autoloader($class) {
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// Check that the class starts with "Requests"
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if (strpos($class, 'Requests') !== 0) {
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return;
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}
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$file = str_replace('_', '/', $class);
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if (file_exists(dirname(__FILE__) . '/' . $file . '.php')) {
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require_once dirname(__FILE__) . '/' . $file . '.php';
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}
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}
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/**
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* Register the built-in autoloader
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*
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* @codeCoverageIgnore
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*/
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public static function register_autoloader() {
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spl_autoload_register(array('Requests', 'autoloader'));
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}
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/**
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* Register a transport
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*
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* @param string $transport Transport class to add, must support the Requests_Transport interface
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*/
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public static function add_transport($transport) {
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if (empty(self::$transports)) {
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self::$transports = array(
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'Requests_Transport_cURL',
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'Requests_Transport_fsockopen',
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);
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}
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self::$transports = array_merge(self::$transports, array($transport));
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}
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/**
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* Get a working transport
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*
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* @throws Requests_Exception If no valid transport is found (`notransport`)
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* @return Requests_Transport
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*/
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protected static function get_transport($capabilities = array()) {
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// Caching code, don't bother testing coverage
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// @codeCoverageIgnoreStart
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// array of capabilities as a string to be used as an array key
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ksort($capabilities);
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$cap_string = serialize($capabilities);
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// Don't search for a transport if it's already been done for these $capabilities
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if (isset(self::$transport[$cap_string]) && self::$transport[$cap_string] !== null) {
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$class = self::$transport[$cap_string];
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return new $class();
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}
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// @codeCoverageIgnoreEnd
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if (empty(self::$transports)) {
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self::$transports = array(
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'Requests_Transport_cURL',
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'Requests_Transport_fsockopen',
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);
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}
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// Find us a working transport
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foreach (self::$transports as $class) {
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if (!class_exists($class)) {
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continue;
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}
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$result = call_user_func(array($class, 'test'), $capabilities);
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if ($result) {
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self::$transport[$cap_string] = $class;
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break;
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}
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}
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if (self::$transport[$cap_string] === null) {
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throw new Requests_Exception('No working transports found', 'notransport', self::$transports);
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}
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$class = self::$transport[$cap_string];
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return new $class();
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}
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/**#@+
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* @see request()
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* @param string $url
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* @param array $headers
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* @param array $options
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* @return Requests_Response
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*/
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/**
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* Send a GET request
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*/
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public static function get($url, $headers = array(), $options = array()) {
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return self::request($url, $headers, null, self::GET, $options);
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}
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/**
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* Send a HEAD request
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*/
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public static function head($url, $headers = array(), $options = array()) {
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return self::request($url, $headers, null, self::HEAD, $options);
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}
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/**
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* Send a DELETE request
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*/
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public static function delete($url, $headers = array(), $options = array()) {
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return self::request($url, $headers, null, self::DELETE, $options);
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}
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/**
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* Send a TRACE request
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*/
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public static function trace($url, $headers = array(), $options = array()) {
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return self::request($url, $headers, null, self::TRACE, $options);
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}
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/**#@-*/
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/**#@+
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* @see request()
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* @param string $url
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* @param array $headers
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* @param array $data
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* @param array $options
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* @return Requests_Response
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*/
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/**
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* Send a POST request
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*/
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public static function post($url, $headers = array(), $data = array(), $options = array()) {
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return self::request($url, $headers, $data, self::POST, $options);
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}
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/**
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* Send a PUT request
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*/
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public static function put($url, $headers = array(), $data = array(), $options = array()) {
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return self::request($url, $headers, $data, self::PUT, $options);
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}
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/**
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* Send an OPTIONS request
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*/
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public static function options($url, $headers = array(), $data = array(), $options = array()) {
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return self::request($url, $headers, $data, self::OPTIONS, $options);
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}
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/**
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* Send a PATCH request
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*
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* Note: Unlike {@see post} and {@see put}, `$headers` is required, as the
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* specification recommends that should send an ETag
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*
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* @link https://tools.ietf.org/html/rfc5789
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*/
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public static function patch($url, $headers, $data = array(), $options = array()) {
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return self::request($url, $headers, $data, self::PATCH, $options);
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}
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/**#@-*/
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/**
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* Main interface for HTTP requests
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*
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* This method initiates a request and sends it via a transport before
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* parsing.
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*
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* The `$options` parameter takes an associative array with the following
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* options:
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*
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* - `timeout`: How long should we wait for a response?
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* Note: for cURL, a minimum of 1 second applies, as DNS resolution
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* operates at second-resolution only.
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* (float, seconds with a millisecond precision, default: 10, example: 0.01)
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* - `connect_timeout`: How long should we wait while trying to connect?
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* (float, seconds with a millisecond precision, default: 10, example: 0.01)
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* - `useragent`: Useragent to send to the server
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* (string, default: php-requests/$version)
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* - `follow_redirects`: Should we follow 3xx redirects?
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* (boolean, default: true)
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* - `redirects`: How many times should we redirect before erroring?
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* (integer, default: 10)
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* - `blocking`: Should we block processing on this request?
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* (boolean, default: true)
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* - `filename`: File to stream the body to instead.
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* (string|boolean, default: false)
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* - `auth`: Authentication handler or array of user/password details to use
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* for Basic authentication
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* (Requests_Auth|array|boolean, default: false)
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* - `proxy`: Proxy details to use for proxy by-passing and authentication
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* (Requests_Proxy|array|string|boolean, default: false)
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* - `max_bytes`: Limit for the response body size.
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* (integer|boolean, default: false)
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* - `idn`: Enable IDN parsing
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* (boolean, default: true)
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* - `transport`: Custom transport. Either a class name, or a
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* transport object. Defaults to the first working transport from
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* {@see getTransport()}
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* (string|Requests_Transport, default: {@see getTransport()})
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* - `hooks`: Hooks handler.
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* (Requests_Hooker, default: new Requests_Hooks())
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* - `verify`: Should we verify SSL certificates? Allows passing in a custom
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* certificate file as a string. (Using true uses the system-wide root
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* certificate store instead, but this may have different behaviour
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* across transports.)
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* (string|boolean, default: library/Requests/Transport/cacert.pem)
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* - `verifyname`: Should we verify the common name in the SSL certificate?
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* (boolean, default: true)
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* - `data_format`: How should we send the `$data` parameter?
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* (string, one of 'query' or 'body', default: 'query' for
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* HEAD/GET/DELETE, 'body' for POST/PUT/OPTIONS/PATCH)
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*
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* @throws Requests_Exception On invalid URLs (`nonhttp`)
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*
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* @param string $url URL to request
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* @param array $headers Extra headers to send with the request
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* @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
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* @param string $type HTTP request type (use Requests constants)
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* @param array $options Options for the request (see description for more information)
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* @return Requests_Response
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*/
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public static function request($url, $headers = array(), $data = array(), $type = self::GET, $options = array()) {
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if (empty($options['type'])) {
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$options['type'] = $type;
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}
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$options = array_merge(self::get_default_options(), $options);
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self::set_defaults($url, $headers, $data, $type, $options);
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$options['hooks']->dispatch('requests.before_request', array(&$url, &$headers, &$data, &$type, &$options));
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if (!empty($options['transport'])) {
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$transport = $options['transport'];
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if (is_string($options['transport'])) {
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$transport = new $transport();
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}
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}
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else {
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$need_ssl = (stripos($url, 'https://') === 0);
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$capabilities = array('ssl' => $need_ssl);
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$transport = self::get_transport($capabilities);
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}
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$response = $transport->request($url, $headers, $data, $options);
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$options['hooks']->dispatch('requests.before_parse', array(&$response, $url, $headers, $data, $type, $options));
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return self::parse_response($response, $url, $headers, $data, $options);
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}
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/**
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* Send multiple HTTP requests simultaneously
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*
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* The `$requests` parameter takes an associative or indexed array of
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* request fields. The key of each request can be used to match up the
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* request with the returned data, or with the request passed into your
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* `multiple.request.complete` callback.
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*
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* The request fields value is an associative array with the following keys:
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*
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* - `url`: Request URL Same as the `$url` parameter to
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* {@see Requests::request}
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* (string, required)
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* - `headers`: Associative array of header fields. Same as the `$headers`
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* parameter to {@see Requests::request}
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* (array, default: `array()`)
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* - `data`: Associative array of data fields or a string. Same as the
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* `$data` parameter to {@see Requests::request}
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* (array|string, default: `array()`)
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* - `type`: HTTP request type (use Requests constants). Same as the `$type`
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* parameter to {@see Requests::request}
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* (string, default: `Requests::GET`)
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* - `cookies`: Associative array of cookie name to value, or cookie jar.
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* (array|Requests_Cookie_Jar)
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*
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* If the `$options` parameter is specified, individual requests will
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* inherit options from it. This can be used to use a single hooking system,
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* or set all the types to `Requests::POST`, for example.
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*
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* In addition, the `$options` parameter takes the following global options:
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*
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* - `complete`: A callback for when a request is complete. Takes two
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* parameters, a Requests_Response/Requests_Exception reference, and the
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* ID from the request array (Note: this can also be overridden on a
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* per-request basis, although that's a little silly)
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* (callback)
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*
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* @param array $requests Requests data (see description for more information)
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* @param array $options Global and default options (see {@see Requests::request})
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* @return array Responses (either Requests_Response or a Requests_Exception object)
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*/
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public static function request_multiple($requests, $options = array()) {
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$options = array_merge(self::get_default_options(true), $options);
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if (!empty($options['hooks'])) {
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$options['hooks']->register('transport.internal.parse_response', array('Requests', 'parse_multiple'));
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if (!empty($options['complete'])) {
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$options['hooks']->register('multiple.request.complete', $options['complete']);
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}
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}
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foreach ($requests as $id => &$request) {
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if (!isset($request['headers'])) {
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$request['headers'] = array();
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}
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if (!isset($request['data'])) {
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$request['data'] = array();
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}
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if (!isset($request['type'])) {
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$request['type'] = self::GET;
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}
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if (!isset($request['options'])) {
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$request['options'] = $options;
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$request['options']['type'] = $request['type'];
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}
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else {
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if (empty($request['options']['type'])) {
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$request['options']['type'] = $request['type'];
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}
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$request['options'] = array_merge($options, $request['options']);
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}
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self::set_defaults($request['url'], $request['headers'], $request['data'], $request['type'], $request['options']);
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// Ensure we only hook in once
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if ($request['options']['hooks'] !== $options['hooks']) {
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$request['options']['hooks']->register('transport.internal.parse_response', array('Requests', 'parse_multiple'));
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if (!empty($request['options']['complete'])) {
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$request['options']['hooks']->register('multiple.request.complete', $request['options']['complete']);
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}
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}
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}
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unset($request);
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if (!empty($options['transport'])) {
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$transport = $options['transport'];
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if (is_string($options['transport'])) {
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$transport = new $transport();
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}
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}
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else {
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$transport = self::get_transport();
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}
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$responses = $transport->request_multiple($requests, $options);
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foreach ($responses as $id => &$response) {
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// If our hook got messed with somehow, ensure we end up with the
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// correct response
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if (is_string($response)) {
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$request = $requests[$id];
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self::parse_multiple($response, $request);
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$request['options']['hooks']->dispatch('multiple.request.complete', array(&$response, $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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* Get the default options
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*
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* @see Requests::request() for values returned by this method
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* @param boolean $multirequest Is this a multirequest?
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* @return array Default option values
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*/
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protected static function get_default_options($multirequest = false) {
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$defaults = array(
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'timeout' => 10,
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'connect_timeout' => 10,
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'useragent' => 'php-requests/' . self::VERSION,
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'protocol_version' => 1.1,
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'redirected' => 0,
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'redirects' => 10,
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'follow_redirects' => true,
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'blocking' => true,
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'type' => self::GET,
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'filename' => false,
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'auth' => false,
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'proxy' => false,
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'cookies' => false,
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'max_bytes' => false,
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'idn' => true,
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'hooks' => null,
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'transport' => null,
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'verify' => self::get_certificate_path(),
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'verifyname' => true,
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);
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if ($multirequest !== false) {
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$defaults['complete'] = null;
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}
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return $defaults;
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}
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/**
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* Get default certificate path.
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*
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* @return string Default certificate path.
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*/
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public static function get_certificate_path() {
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if (!empty(self::$certificate_path)) {
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return self::$certificate_path;
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}
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return dirname(__FILE__) . '/Requests/Transport/cacert.pem';
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}
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/**
|
||
* Set default certificate path.
|
||
*
|
||
* @param string $path Certificate path, pointing to a PEM file.
|
||
*/
|
||
public static function set_certificate_path($path) {
|
||
self::$certificate_path = $path;
|
||
}
|
||
|
||
/**
|
||
* Set the default values
|
||
*
|
||
* @param string $url URL to request
|
||
* @param array $headers Extra headers to send with the request
|
||
* @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
|
||
* @param string $type HTTP request type
|
||
* @param array $options Options for the request
|
||
* @return array $options
|
||
*/
|
||
protected static function set_defaults(&$url, &$headers, &$data, &$type, &$options) {
|
||
if (!preg_match('/^http(s)?:\/\//i', $url, $matches)) {
|
||
throw new Requests_Exception('Only HTTP(S) requests are handled.', 'nonhttp', $url);
|
||
}
|
||
|
||
if (empty($options['hooks'])) {
|
||
$options['hooks'] = new Requests_Hooks();
|
||
}
|
||
|
||
if (is_array($options['auth'])) {
|
||
$options['auth'] = new Requests_Auth_Basic($options['auth']);
|
||
}
|
||
if ($options['auth'] !== false) {
|
||
$options['auth']->register($options['hooks']);
|
||
}
|
||
|
||
if (is_string($options['proxy']) || is_array($options['proxy'])) {
|
||
$options['proxy'] = new Requests_Proxy_HTTP($options['proxy']);
|
||
}
|
||
if ($options['proxy'] !== false) {
|
||
$options['proxy']->register($options['hooks']);
|
||
}
|
||
|
||
if (is_array($options['cookies'])) {
|
||
$options['cookies'] = new Requests_Cookie_Jar($options['cookies']);
|
||
}
|
||
elseif (empty($options['cookies'])) {
|
||
$options['cookies'] = new Requests_Cookie_Jar();
|
||
}
|
||
if ($options['cookies'] !== false) {
|
||
$options['cookies']->register($options['hooks']);
|
||
}
|
||
|
||
if ($options['idn'] !== false) {
|
||
$iri = new Requests_IRI($url);
|
||
$iri->host = Requests_IDNAEncoder::encode($iri->ihost);
|
||
$url = $iri->uri;
|
||
}
|
||
|
||
// Massage the type to ensure we support it.
|
||
$type = strtoupper($type);
|
||
|
||
if (!isset($options['data_format'])) {
|
||
if (in_array($type, array(self::HEAD, self::GET, self::DELETE), true)) {
|
||
$options['data_format'] = 'query';
|
||
}
|
||
else {
|
||
$options['data_format'] = 'body';
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* HTTP response parser
|
||
*
|
||
* @throws Requests_Exception On missing head/body separator (`requests.no_crlf_separator`)
|
||
* @throws Requests_Exception On missing head/body separator (`noversion`)
|
||
* @throws Requests_Exception On missing head/body separator (`toomanyredirects`)
|
||
*
|
||
* @param string $headers Full response text including headers and body
|
||
* @param string $url Original request URL
|
||
* @param array $req_headers Original $headers array passed to {@link request()}, in case we need to follow redirects
|
||
* @param array $req_data Original $data array passed to {@link request()}, in case we need to follow redirects
|
||
* @param array $options Original $options array passed to {@link request()}, in case we need to follow redirects
|
||
* @return Requests_Response
|
||
*/
|
||
protected static function parse_response($headers, $url, $req_headers, $req_data, $options) {
|
||
$return = new Requests_Response();
|
||
if (!$options['blocking']) {
|
||
return $return;
|
||
}
|
||
|
||
$return->raw = $headers;
|
||
$return->url = (string) $url;
|
||
$return->body = '';
|
||
|
||
if (!$options['filename']) {
|
||
$pos = strpos($headers, "\r\n\r\n");
|
||
if ($pos === false) {
|
||
// Crap!
|
||
throw new Requests_Exception('Missing header/body separator', 'requests.no_crlf_separator');
|
||
}
|
||
|
||
$headers = substr($return->raw, 0, $pos);
|
||
// Headers will always be separated from the body by two new lines - `\n\r\n\r`.
|
||
$body = substr($return->raw, $pos + 4);
|
||
if (!empty($body)) {
|
||
$return->body = $body;
|
||
}
|
||
}
|
||
// Pretend CRLF = LF for compatibility (RFC 2616, section 19.3)
|
||
$headers = str_replace("\r\n", "\n", $headers);
|
||
// Unfold headers (replace [CRLF] 1*( SP | HT ) with SP) as per RFC 2616 (section 2.2)
|
||
$headers = preg_replace('/\n[ \t]/', ' ', $headers);
|
||
$headers = explode("\n", $headers);
|
||
preg_match('#^HTTP/(1\.\d)[ \t]+(\d+)#i', array_shift($headers), $matches);
|
||
if (empty($matches)) {
|
||
throw new Requests_Exception('Response could not be parsed', 'noversion', $headers);
|
||
}
|
||
$return->protocol_version = (float) $matches[1];
|
||
$return->status_code = (int) $matches[2];
|
||
if ($return->status_code >= 200 && $return->status_code < 300) {
|
||
$return->success = true;
|
||
}
|
||
|
||
foreach ($headers as $header) {
|
||
list($key, $value) = explode(':', $header, 2);
|
||
$value = trim($value);
|
||
preg_replace('#(\s+)#i', ' ', $value);
|
||
$return->headers[$key] = $value;
|
||
}
|
||
if (isset($return->headers['transfer-encoding'])) {
|
||
$return->body = self::decode_chunked($return->body);
|
||
unset($return->headers['transfer-encoding']);
|
||
}
|
||
if (isset($return->headers['content-encoding'])) {
|
||
$return->body = self::decompress($return->body);
|
||
}
|
||
|
||
//fsockopen and cURL compatibility
|
||
if (isset($return->headers['connection'])) {
|
||
unset($return->headers['connection']);
|
||
}
|
||
|
||
$options['hooks']->dispatch('requests.before_redirect_check', array(&$return, $req_headers, $req_data, $options));
|
||
|
||
if ($return->is_redirect() && $options['follow_redirects'] === true) {
|
||
if (isset($return->headers['location']) && $options['redirected'] < $options['redirects']) {
|
||
if ($return->status_code === 303) {
|
||
$options['type'] = self::GET;
|
||
}
|
||
$options['redirected']++;
|
||
$location = $return->headers['location'];
|
||
if (strpos($location, 'http://') !== 0 && strpos($location, 'https://') !== 0) {
|
||
// relative redirect, for compatibility make it absolute
|
||
$location = Requests_IRI::absolutize($url, $location);
|
||
$location = $location->uri;
|
||
}
|
||
|
||
$hook_args = array(
|
||
&$location,
|
||
&$req_headers,
|
||
&$req_data,
|
||
&$options,
|
||
$return,
|
||
);
|
||
$options['hooks']->dispatch('requests.before_redirect', $hook_args);
|
||
$redirected = self::request($location, $req_headers, $req_data, $options['type'], $options);
|
||
$redirected->history[] = $return;
|
||
return $redirected;
|
||
}
|
||
elseif ($options['redirected'] >= $options['redirects']) {
|
||
throw new Requests_Exception('Too many redirects', 'toomanyredirects', $return);
|
||
}
|
||
}
|
||
|
||
$return->redirects = $options['redirected'];
|
||
|
||
$options['hooks']->dispatch('requests.after_request', array(&$return, $req_headers, $req_data, $options));
|
||
return $return;
|
||
}
|
||
|
||
/**
|
||
* Callback for `transport.internal.parse_response`
|
||
*
|
||
* Internal use only. Converts a raw HTTP response to a Requests_Response
|
||
* while still executing a multiple request.
|
||
*
|
||
* @param string $response Full response text including headers and body (will be overwritten with Response instance)
|
||
* @param array $request Request data as passed into {@see Requests::request_multiple()}
|
||
* @return null `$response` is either set to a Requests_Response instance, or a Requests_Exception object
|
||
*/
|
||
public static function parse_multiple(&$response, $request) {
|
||
try {
|
||
$url = $request['url'];
|
||
$headers = $request['headers'];
|
||
$data = $request['data'];
|
||
$options = $request['options'];
|
||
$response = self::parse_response($response, $url, $headers, $data, $options);
|
||
}
|
||
catch (Requests_Exception $e) {
|
||
$response = $e;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Decoded a chunked body as per RFC 2616
|
||
*
|
||
* @see https://tools.ietf.org/html/rfc2616#section-3.6.1
|
||
* @param string $data Chunked body
|
||
* @return string Decoded body
|
||
*/
|
||
protected static function decode_chunked($data) {
|
||
if (!preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', trim($data))) {
|
||
return $data;
|
||
}
|
||
|
||
$decoded = '';
|
||
$encoded = $data;
|
||
|
||
while (true) {
|
||
$is_chunked = (bool) preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', $encoded, $matches);
|
||
if (!$is_chunked) {
|
||
// Looks like it's not chunked after all
|
||
return $data;
|
||
}
|
||
|
||
$length = hexdec(trim($matches[1]));
|
||
if ($length === 0) {
|
||
// Ignore trailer headers
|
||
return $decoded;
|
||
}
|
||
|
||
$chunk_length = strlen($matches[0]);
|
||
$decoded .= substr($encoded, $chunk_length, $length);
|
||
$encoded = substr($encoded, $chunk_length + $length + 2);
|
||
|
||
if (trim($encoded) === '0' || empty($encoded)) {
|
||
return $decoded;
|
||
}
|
||
}
|
||
|
||
// We'll never actually get down here
|
||
// @codeCoverageIgnoreStart
|
||
}
|
||
// @codeCoverageIgnoreEnd
|
||
|
||
/**
|
||
* Convert a key => value array to a 'key: value' array for headers
|
||
*
|
||
* @param array $array Dictionary of header values
|
||
* @return array List of headers
|
||
*/
|
||
public static function flatten($array) {
|
||
$return = array();
|
||
foreach ($array as $key => $value) {
|
||
$return[] = sprintf('%s: %s', $key, $value);
|
||
}
|
||
return $return;
|
||
}
|
||
|
||
/**
|
||
* Convert a key => value array to a 'key: value' array for headers
|
||
*
|
||
* @codeCoverageIgnore
|
||
* @deprecated Misspelling of {@see Requests::flatten}
|
||
* @param array $array Dictionary of header values
|
||
* @return array List of headers
|
||
*/
|
||
public static function flattern($array) {
|
||
return self::flatten($array);
|
||
}
|
||
|
||
/**
|
||
* Decompress an encoded body
|
||
*
|
||
* Implements gzip, compress and deflate. Guesses which it is by attempting
|
||
* to decode.
|
||
*
|
||
* @param string $data Compressed data in one of the above formats
|
||
* @return string Decompressed string
|
||
*/
|
||
public static function decompress($data) {
|
||
if (substr($data, 0, 2) !== "\x1f\x8b" && substr($data, 0, 2) !== "\x78\x9c") {
|
||
// Not actually compressed. Probably cURL ruining this for us.
|
||
return $data;
|
||
}
|
||
|
||
if (function_exists('gzdecode')) {
|
||
// phpcs:ignore PHPCompatibility.FunctionUse.NewFunctions.gzdecodeFound -- Wrapped in function_exists() for PHP 5.2.
|
||
$decoded = @gzdecode($data);
|
||
if ($decoded !== false) {
|
||
return $decoded;
|
||
}
|
||
}
|
||
|
||
if (function_exists('gzinflate')) {
|
||
$decoded = @gzinflate($data);
|
||
if ($decoded !== false) {
|
||
return $decoded;
|
||
}
|
||
}
|
||
|
||
$decoded = self::compatible_gzinflate($data);
|
||
if ($decoded !== false) {
|
||
return $decoded;
|
||
}
|
||
|
||
if (function_exists('gzuncompress')) {
|
||
$decoded = @gzuncompress($data);
|
||
if ($decoded !== false) {
|
||
return $decoded;
|
||
}
|
||
}
|
||
|
||
return $data;
|
||
}
|
||
|
||
/**
|
||
* Decompression of deflated string while staying compatible with the majority of servers.
|
||
*
|
||
* Certain Servers will return deflated data with headers which PHP's gzinflate()
|
||
* function cannot handle out of the box. The following function has been created from
|
||
* various snippets on the gzinflate() PHP documentation.
|
||
*
|
||
* Warning: Magic numbers within. Due to the potential different formats that the compressed
|
||
* data may be returned in, some "magic offsets" are needed to ensure proper decompression
|
||
* takes place. For a simple progmatic way to determine the magic offset in use, see:
|
||
* https://core.trac.wordpress.org/ticket/18273
|
||
*
|
||
* @since 2.8.1
|
||
* @link https://core.trac.wordpress.org/ticket/18273
|
||
* @link https://secure.php.net/manual/en/function.gzinflate.php#70875
|
||
* @link https://secure.php.net/manual/en/function.gzinflate.php#77336
|
||
*
|
||
* @param string $gz_data String to decompress.
|
||
* @return string|bool False on failure.
|
||
*/
|
||
public static function compatible_gzinflate($gz_data) {
|
||
// Compressed data might contain a full zlib header, if so strip it for
|
||
// gzinflate()
|
||
if (substr($gz_data, 0, 3) === "\x1f\x8b\x08") {
|
||
$i = 10;
|
||
$flg = ord(substr($gz_data, 3, 1));
|
||
if ($flg > 0) {
|
||
if ($flg & 4) {
|
||
list($xlen) = unpack('v', substr($gz_data, $i, 2));
|
||
$i += 2 + $xlen;
|
||
}
|
||
if ($flg & 8) {
|
||
$i = strpos($gz_data, "\0", $i) + 1;
|
||
}
|
||
if ($flg & 16) {
|
||
$i = strpos($gz_data, "\0", $i) + 1;
|
||
}
|
||
if ($flg & 2) {
|
||
$i += 2;
|
||
}
|
||
}
|
||
$decompressed = self::compatible_gzinflate(substr($gz_data, $i));
|
||
if ($decompressed !== false) {
|
||
return $decompressed;
|
||
}
|
||
}
|
||
|
||
// If the data is Huffman Encoded, we must first strip the leading 2
|
||
// byte Huffman marker for gzinflate()
|
||
// The response is Huffman coded by many compressors such as
|
||
// java.util.zip.Deflater, Ruby’s Zlib::Deflate, and .NET's
|
||
// System.IO.Compression.DeflateStream.
|
||
//
|
||
// See https://decompres.blogspot.com/ for a quick explanation of this
|
||
// data type
|
||
$huffman_encoded = false;
|
||
|
||
// low nibble of first byte should be 0x08
|
||
list(, $first_nibble) = unpack('h', $gz_data);
|
||
|
||
// First 2 bytes should be divisible by 0x1F
|
||
list(, $first_two_bytes) = unpack('n', $gz_data);
|
||
|
||
if ($first_nibble === 0x08 && ($first_two_bytes % 0x1F) === 0) {
|
||
$huffman_encoded = true;
|
||
}
|
||
|
||
if ($huffman_encoded) {
|
||
$decompressed = @gzinflate(substr($gz_data, 2));
|
||
if ($decompressed !== false) {
|
||
return $decompressed;
|
||
}
|
||
}
|
||
|
||
if (substr($gz_data, 0, 4) === "\x50\x4b\x03\x04") {
|
||
// ZIP file format header
|
||
// Offset 6: 2 bytes, General-purpose field
|
||
// Offset 26: 2 bytes, filename length
|
||
// Offset 28: 2 bytes, optional field length
|
||
// Offset 30: Filename field, followed by optional field, followed
|
||
// immediately by data
|
||
list(, $general_purpose_flag) = unpack('v', substr($gz_data, 6, 2));
|
||
|
||
// If the file has been compressed on the fly, 0x08 bit is set of
|
||
// the general purpose field. We can use this to differentiate
|
||
// between a compressed document, and a ZIP file
|
||
$zip_compressed_on_the_fly = ((0x08 & $general_purpose_flag) === 0x08);
|
||
|
||
if (!$zip_compressed_on_the_fly) {
|
||
// Don't attempt to decode a compressed zip file
|
||
return $gz_data;
|
||
}
|
||
|
||
// Determine the first byte of data, based on the above ZIP header
|
||
// offsets:
|
||
$first_file_start = array_sum(unpack('v2', substr($gz_data, 26, 4)));
|
||
$decompressed = @gzinflate(substr($gz_data, 30 + $first_file_start));
|
||
if ($decompressed !== false) {
|
||
return $decompressed;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
// Finally fall back to straight gzinflate
|
||
$decompressed = @gzinflate($gz_data);
|
||
if ($decompressed !== false) {
|
||
return $decompressed;
|
||
}
|
||
|
||
// Fallback for all above failing, not expected, but included for
|
||
// debugging and preventing regressions and to track stats
|
||
$decompressed = @gzinflate(substr($gz_data, 2));
|
||
if ($decompressed !== false) {
|
||
return $decompressed;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
public static function match_domain($host, $reference) {
|
||
// Check for a direct match
|
||
if ($host === $reference) {
|
||
return true;
|
||
}
|
||
|
||
// Calculate the valid wildcard match if the host is not an IP address
|
||
// Also validates that the host has 3 parts or more, as per Firefox's
|
||
// ruleset.
|
||
$parts = explode('.', $host);
|
||
if (ip2long($host) === false && count($parts) >= 3) {
|
||
$parts[0] = '*';
|
||
$wildcard = implode('.', $parts);
|
||
if ($wildcard === $reference) {
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
}
|