339 lines
12 KiB
PHP
339 lines
12 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Http
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* @subpackage Client_Adapter
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* @version $Id: Socket.php 12105 2008-10-23 23:38:55Z shahar $
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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require_once 'Zend/Uri/Http.php';
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require_once 'Zend/Http/Client/Adapter/Interface.php';
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/**
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* A sockets based (stream_socket_client) adapter class for Zend_Http_Client. Can be used
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* on almost every PHP environment, and does not require any special extensions.
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*
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* @category Zend
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* @package Zend_Http
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* @subpackage Client_Adapter
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Http_Client_Adapter_Socket implements Zend_Http_Client_Adapter_Interface
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{
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/**
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* The socket for server connection
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*
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* @var resource|null
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*/
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protected $socket = null;
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/**
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* What host/port are we connected to?
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*
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* @var array
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*/
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protected $connected_to = array(null, null);
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/**
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* Parameters array
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*
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* @var array
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*/
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protected $config = array(
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'persistent' => false,
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'ssltransport' => 'ssl',
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'sslcert' => null,
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'sslpassphrase' => null
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);
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/**
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* Request method - will be set by write() and might be used by read()
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*
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* @var string
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*/
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protected $method = null;
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/**
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* Adapter constructor, currently empty. Config is set using setConfig()
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*
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*/
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public function __construct()
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{
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}
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/**
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* Set the configuration array for the adapter
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*
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* @param array $config
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*/
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public function setConfig($config = array())
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{
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if (! is_array($config)) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception(
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'$concig expects an array, ' . gettype($config) . ' recieved.');
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}
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foreach ($config as $k => $v) {
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$this->config[strtolower($k)] = $v;
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}
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}
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/**
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* Connect to the remote server
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*
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* @param string $host
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* @param int $port
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* @param boolean $secure
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* @param int $timeout
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*/
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public function connect($host, $port = 80, $secure = false)
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{
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// If the URI should be accessed via SSL, prepend the Hostname with ssl://
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$host = ($secure ? $this->config['ssltransport'] : 'tcp') . '://' . $host;
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// If we are connected to the wrong host, disconnect first
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if (($this->connected_to[0] != $host || $this->connected_to[1] != $port)) {
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if (is_resource($this->socket)) $this->close();
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}
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// Now, if we are not connected, connect
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if (! is_resource($this->socket) || ! $this->config['keepalive']) {
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$context = stream_context_create();
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if ($secure) {
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if ($this->config['sslcert'] !== null) {
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if (! stream_context_set_option($context, 'ssl', 'local_cert',
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$this->config['sslcert'])) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Unable to set sslcert option');
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}
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}
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if ($this->config['sslpassphrase'] !== null) {
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if (! stream_context_set_option($context, 'ssl', 'passphrase',
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$this->config['sslpassphrase'])) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Unable to set sslpassphrase option');
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}
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}
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}
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$flags = STREAM_CLIENT_CONNECT;
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if ($this->config['persistent']) $flags |= STREAM_CLIENT_PERSISTENT;
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$this->socket = @stream_socket_client($host . ':' . $port,
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$errno,
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$errstr,
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(int) $this->config['timeout'],
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$flags,
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$context);
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if (! $this->socket) {
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$this->close();
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception(
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'Unable to Connect to ' . $host . ':' . $port . '. Error #' . $errno . ': ' . $errstr);
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}
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// Set the stream timeout
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if (! stream_set_timeout($this->socket, (int) $this->config['timeout'])) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Unable to set the connection timeout');
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}
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// Update connected_to
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$this->connected_to = array($host, $port);
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}
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}
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/**
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* Send request to the remote server
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*
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* @param string $method
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* @param Zend_Uri_Http $uri
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* @param string $http_ver
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* @param array $headers
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* @param string $body
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* @return string Request as string
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*/
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public function write($method, $uri, $http_ver = '1.1', $headers = array(), $body = '')
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{
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// Make sure we're properly connected
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if (! $this->socket) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Trying to write but we are not connected');
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}
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$host = $uri->getHost();
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$host = (strtolower($uri->getScheme()) == 'https' ? $this->config['ssltransport'] : 'tcp') . '://' . $host;
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if ($this->connected_to[0] != $host || $this->connected_to[1] != $uri->getPort()) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Trying to write but we are connected to the wrong host');
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}
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// Save request method for later
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$this->method = $method;
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// Build request headers
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$path = $uri->getPath();
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if ($uri->getQuery()) $path .= '?' . $uri->getQuery();
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$request = "{$method} {$path} HTTP/{$http_ver}\r\n";
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foreach ($headers as $k => $v) {
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if (is_string($k)) $v = ucfirst($k) . ": $v";
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$request .= "$v\r\n";
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}
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// Add the request body
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$request .= "\r\n" . $body;
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// Send the request
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if (! @fwrite($this->socket, $request)) {
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Error writing request to server');
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}
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return $request;
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}
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/**
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* Read response from server
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*
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* @return string
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*/
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public function read()
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{
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// First, read headers only
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$response = '';
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$gotStatus = false;
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while (($line = @fgets($this->socket)) !== false) {
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$gotStatus = $gotStatus || (strpos($line, 'HTTP') !== false);
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if ($gotStatus) {
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$response .= $line;
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if (rtrim($line) === '') break;
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}
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}
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$statusCode = Zend_Http_Response::extractCode($response);
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// Handle 100 and 101 responses internally by restarting the read again
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if ($statusCode == 100 || $statusCode == 101) return $this->read();
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/**
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* Responses to HEAD requests and 204 or 304 responses are not expected
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* to have a body - stop reading here
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*/
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if ($statusCode == 304 || $statusCode == 204 ||
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$this->method == Zend_Http_Client::HEAD) return $response;
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// Check headers to see what kind of connection / transfer encoding we have
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$headers = Zend_Http_Response::extractHeaders($response);
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// If we got a 'transfer-encoding: chunked' header
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if (isset($headers['transfer-encoding'])) {
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if ($headers['transfer-encoding'] == 'chunked') {
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do {
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$line = @fgets($this->socket);
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$chunk = $line;
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// Figure out the next chunk size
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$chunksize = trim($line);
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if (! ctype_xdigit($chunksize)) {
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$this->close();
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require_once 'Zend/Http/Client/Adapter/Exception.php';
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throw new Zend_Http_Client_Adapter_Exception('Invalid chunk size "' .
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$chunksize . '" unable to read chunked body');
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}
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// Convert the hexadecimal value to plain integer
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$chunksize = hexdec($chunksize);
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// Read chunk
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$left_to_read = $chunksize;
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while ($left_to_read > 0) {
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$line = @fread($this->socket, $left_to_read);
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$chunk .= $line;
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$left_to_read -= strlen($line);
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// Break if the connection ended prematurely
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if (feof($this->socket)) break;
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}
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$chunk .= @fgets($this->socket);
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$response .= $chunk;
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} while ($chunksize > 0);
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} else {
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throw new Zend_Http_Client_Adapter_Exception('Cannot handle "' .
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$headers['transfer-encoding'] . '" transfer encoding');
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}
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// Else, if we got the content-length header, read this number of bytes
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} elseif (isset($headers['content-length'])) {
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$left_to_read = $headers['content-length'];
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$chunk = '';
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while ($left_to_read > 0) {
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$chunk = @fread($this->socket, $left_to_read);
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$left_to_read -= strlen($chunk);
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$response .= $chunk;
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// Break if the connection ended prematurely
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if (feof($this->socket)) break;
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}
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// Fallback: just read the response until EOF
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} else {
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while (($buff = @fread($this->socket, 8192)) !== false) {
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$response .= $buff;
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if (feof($this->socket)) break;
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}
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$this->close();
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}
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// Close the connection if requested to do so by the server
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if (isset($headers['connection']) && $headers['connection'] == 'close') {
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$this->close();
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}
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return $response;
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}
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/**
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* Close the connection to the server
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*
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*/
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public function close()
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{
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if (is_resource($this->socket)) @fclose($this->socket);
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$this->socket = null;
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$this->connected_to = array(null, null);
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}
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/**
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* Destructor: make sure the socket is disconnected
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*
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* If we are in persistent TCP mode, will not close the connection
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*
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*/
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public function __destruct()
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{
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if (! $this->config['persistent']) {
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if ($this->socket) $this->close();
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}
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}
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}
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