445 lines
10 KiB
PHP
445 lines
10 KiB
PHP
<?php
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/**
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* HTTP Response from HttpSocket.
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @since CakePHP(tm) v 2.0.0
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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/**
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* HTTP Response from HttpSocket.
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*
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* @package Cake.Network.Http
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*/
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class HttpSocketResponse implements ArrayAccess {
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/**
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* Body content
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*
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* @var string
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*/
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public $body = '';
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/**
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* Headers
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*
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* @var array
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*/
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public $headers = array();
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/**
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* Cookies
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*
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* @var array
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*/
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public $cookies = array();
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/**
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* HTTP version
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*
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* @var string
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*/
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public $httpVersion = 'HTTP/1.1';
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/**
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* Response code
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*
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* @var integer
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*/
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public $code = 0;
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/**
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* Reason phrase
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*
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* @var string
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*/
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public $reasonPhrase = '';
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/**
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* Pure raw content
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*
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* @var string
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*/
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public $raw = '';
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/**
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* Context data in the response.
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* Contains SSL certificates for example.
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*
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* @var array
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*/
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public $context = array();
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/**
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* Constructor
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*
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* @param string $message
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*/
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public function __construct($message = null) {
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if ($message !== null) {
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$this->parseResponse($message);
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}
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}
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/**
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* Body content
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*
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* @return string
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*/
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public function body() {
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return (string)$this->body;
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}
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/**
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* Get header in case insensitive
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*
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* @param string $name Header name
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* @param array $headers
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* @return mixed String if header exists or null
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*/
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public function getHeader($name, $headers = null) {
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if (!is_array($headers)) {
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$headers =& $this->headers;
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}
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if (isset($headers[$name])) {
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return $headers[$name];
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}
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foreach ($headers as $key => $value) {
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if (strcasecmp($key, $name) === 0) {
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return $value;
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}
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}
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return null;
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}
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/**
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* If return is 200 (OK)
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*
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* @return boolean
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*/
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public function isOk() {
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return in_array($this->code, array(200, 201, 202, 203, 204, 205, 206));
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}
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/**
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* If return is a valid 3xx (Redirection)
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*
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* @return boolean
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*/
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public function isRedirect() {
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return in_array($this->code, array(301, 302, 303, 307)) && $this->getHeader('Location') !== null;
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}
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/**
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* Parses the given message and breaks it down in parts.
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*
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* @param string $message Message to parse
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* @return void
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* @throws SocketException
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*/
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public function parseResponse($message) {
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if (!is_string($message)) {
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throw new SocketException(__d('cake_dev', 'Invalid response.'));
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}
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if (!preg_match("/^(.+\r\n)(.*)(?<=\r\n)\r\n/Us", $message, $match)) {
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throw new SocketException(__d('cake_dev', 'Invalid HTTP response.'));
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}
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list(, $statusLine, $header) = $match;
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$this->raw = $message;
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$this->body = (string)substr($message, strlen($match[0]));
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if (preg_match("/(.+) ([0-9]{3}) (.+)\r\n/DU", $statusLine, $match)) {
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$this->httpVersion = $match[1];
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$this->code = $match[2];
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$this->reasonPhrase = $match[3];
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}
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$this->headers = $this->_parseHeader($header);
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$transferEncoding = $this->getHeader('Transfer-Encoding');
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$decoded = $this->_decodeBody($this->body, $transferEncoding);
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$this->body = $decoded['body'];
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if (!empty($decoded['header'])) {
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$this->headers = $this->_parseHeader($this->_buildHeader($this->headers) . $this->_buildHeader($decoded['header']));
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}
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if (!empty($this->headers)) {
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$this->cookies = $this->parseCookies($this->headers);
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}
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}
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/**
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* Generic function to decode a $body with a given $encoding. Returns either an array with the keys
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* 'body' and 'header' or false on failure.
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*
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* @param string $body A string containing the body to decode.
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* @param string|boolean $encoding Can be false in case no encoding is being used, or a string representing the encoding.
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* @return mixed Array of response headers and body or false.
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*/
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protected function _decodeBody($body, $encoding = 'chunked') {
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if (!is_string($body)) {
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return false;
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}
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if (empty($encoding)) {
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return array('body' => $body, 'header' => false);
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}
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$decodeMethod = '_decode' . Inflector::camelize(str_replace('-', '_', $encoding)) . 'Body';
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if (!is_callable(array(&$this, $decodeMethod))) {
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return array('body' => $body, 'header' => false);
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}
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return $this->{$decodeMethod}($body);
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}
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/**
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* Decodes a chunked message $body and returns either an array with the keys 'body' and 'header' or false as
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* a result.
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*
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* @param string $body A string containing the chunked body to decode.
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* @return mixed Array of response headers and body or false.
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* @throws SocketException
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*/
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protected function _decodeChunkedBody($body) {
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if (!is_string($body)) {
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return false;
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}
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$decodedBody = null;
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$chunkLength = null;
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while ($chunkLength !== 0) {
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if (!preg_match('/^([0-9a-f]+) *(?:;(.+)=(.+))?(?:\r\n|\n)/iU', $body, $match)) {
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throw new SocketException(__d('cake_dev', 'HttpSocket::_decodeChunkedBody - Could not parse malformed chunk.'));
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}
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$chunkSize = 0;
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$hexLength = 0;
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$chunkExtensionValue = '';
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if (isset($match[0])) {
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$chunkSize = $match[0];
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}
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if (isset($match[1])) {
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$hexLength = $match[1];
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}
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if (isset($match[3])) {
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$chunkExtensionValue = $match[3];
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}
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$body = substr($body, strlen($chunkSize));
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$chunkLength = hexdec($hexLength);
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$chunk = substr($body, 0, $chunkLength);
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$decodedBody .= $chunk;
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if ($chunkLength !== 0) {
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$body = substr($body, $chunkLength + strlen("\r\n"));
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}
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}
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$entityHeader = false;
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if (!empty($body)) {
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$entityHeader = $this->_parseHeader($body);
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}
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return array('body' => $decodedBody, 'header' => $entityHeader);
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}
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/**
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* Parses an array based header.
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*
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* @param array $header Header as an indexed array (field => value)
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* @return array Parsed header
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*/
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protected function _parseHeader($header) {
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if (is_array($header)) {
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return $header;
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} elseif (!is_string($header)) {
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return false;
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}
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preg_match_all("/(.+):(.+)(?:(?<![\t ])\r\n|\$)/Uis", $header, $matches, PREG_SET_ORDER);
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$header = array();
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foreach ($matches as $match) {
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list(, $field, $value) = $match;
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$value = trim($value);
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$value = preg_replace("/[\t ]\r\n/", "\r\n", $value);
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$field = $this->_unescapeToken($field);
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if (!isset($header[$field])) {
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$header[$field] = $value;
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} else {
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$header[$field] = array_merge((array)$header[$field], (array)$value);
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}
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}
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return $header;
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}
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/**
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* Parses cookies in response headers.
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*
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* @param array $header Header array containing one ore more 'Set-Cookie' headers.
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* @return mixed Either false on no cookies, or an array of cookies received.
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*/
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public function parseCookies($header) {
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$cookieHeader = $this->getHeader('Set-Cookie', $header);
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if (!$cookieHeader) {
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return false;
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}
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$cookies = array();
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foreach ((array)$cookieHeader as $cookie) {
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if (strpos($cookie, '";"') !== false) {
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$cookie = str_replace('";"', "{__cookie_replace__}", $cookie);
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$parts = str_replace("{__cookie_replace__}", '";"', explode(';', $cookie));
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} else {
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$parts = preg_split('/\;[ \t]*/', $cookie);
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}
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list($name, $value) = explode('=', array_shift($parts), 2);
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$cookies[$name] = compact('value');
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foreach ($parts as $part) {
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if (strpos($part, '=') !== false) {
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list($key, $value) = explode('=', $part);
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} else {
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$key = $part;
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$value = true;
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}
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$key = strtolower($key);
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if (!isset($cookies[$name][$key])) {
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$cookies[$name][$key] = $value;
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}
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}
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}
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return $cookies;
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}
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/**
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* Unescapes a given $token according to RFC 2616 (HTTP 1.1 specs)
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*
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* @param string $token Token to unescape
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* @param array $chars
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* @return string Unescaped token
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*/
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protected function _unescapeToken($token, $chars = null) {
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$regex = '/"([' . implode('', $this->_tokenEscapeChars(true, $chars)) . '])"/';
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$token = preg_replace($regex, '\\1', $token);
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return $token;
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}
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/**
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* Gets escape chars according to RFC 2616 (HTTP 1.1 specs).
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*
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* @param boolean $hex true to get them as HEX values, false otherwise
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* @param array $chars
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* @return array Escape chars
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*/
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protected function _tokenEscapeChars($hex = true, $chars = null) {
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if (!empty($chars)) {
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$escape = $chars;
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} else {
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$escape = array('"', "(", ")", "<", ">", "@", ",", ";", ":", "\\", "/", "[", "]", "?", "=", "{", "}", " ");
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for ($i = 0; $i <= 31; $i++) {
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$escape[] = chr($i);
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}
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$escape[] = chr(127);
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}
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if (!$hex) {
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return $escape;
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}
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foreach ($escape as $key => $char) {
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$escape[$key] = '\\x' . str_pad(dechex(ord($char)), 2, '0', STR_PAD_LEFT);
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}
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return $escape;
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}
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/**
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* ArrayAccess - Offset Exists
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*
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* @param string $offset
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* @return boolean
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*/
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public function offsetExists($offset) {
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return in_array($offset, array('raw', 'status', 'header', 'body', 'cookies'));
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}
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/**
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* ArrayAccess - Offset Get
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*
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* @param string $offset
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* @return mixed
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*/
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public function offsetGet($offset) {
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switch ($offset) {
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case 'raw':
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$firstLineLength = strpos($this->raw, "\r\n") + 2;
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if ($this->raw[$firstLineLength] === "\r") {
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$header = null;
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} else {
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$header = substr($this->raw, $firstLineLength, strpos($this->raw, "\r\n\r\n") - $firstLineLength) . "\r\n";
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}
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return array(
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'status-line' => $this->httpVersion . ' ' . $this->code . ' ' . $this->reasonPhrase . "\r\n",
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'header' => $header,
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'body' => $this->body,
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'response' => $this->raw
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);
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case 'status':
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return array(
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'http-version' => $this->httpVersion,
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'code' => $this->code,
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'reason-phrase' => $this->reasonPhrase
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);
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case 'header':
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return $this->headers;
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case 'body':
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return $this->body;
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case 'cookies':
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return $this->cookies;
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}
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return null;
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}
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/**
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* ArrayAccess - Offset Set
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*
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* @param string $offset
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* @param mixed $value
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* @return void
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*/
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public function offsetSet($offset, $value) {
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}
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/**
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* ArrayAccess - Offset Unset
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*
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* @param string $offset
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* @return void
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*/
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public function offsetUnset($offset) {
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}
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/**
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* Instance as string
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*
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* @return string
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*/
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public function __toString() {
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return $this->body();
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}
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}
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