[44] | 1 | <?php
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| 2 | /**
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| 3 | * Socket-based adapter for HTTP_Request2
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| 4 | *
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| 5 | * PHP version 5
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| 6 | *
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| 7 | * LICENSE:
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| 8 | *
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| 9 | * Copyright (c) 2008, Alexey Borzov <avb@php.net>
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| 10 | * All rights reserved.
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| 11 | *
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| 12 | * Redistribution and use in source and binary forms, with or without
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| 13 | * modification, are permitted provided that the following conditions
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| 14 | * are met:
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| 15 | *
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| 16 | * * Redistributions of source code must retain the above copyright
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| 17 | * notice, this list of conditions and the following disclaimer.
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| 18 | * * Redistributions in binary form must reproduce the above copyright
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| 19 | * notice, this list of conditions and the following disclaimer in the
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| 20 | * documentation and/or other materials provided with the distribution.
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| 21 | * * The names of the authors may not be used to endorse or promote products
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| 22 | * derived from this software without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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| 25 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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| 26 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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| 28 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 29 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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| 30 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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| 31 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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| 32 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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| 33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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| 34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 35 | *
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| 36 | * @category HTTP
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| 37 | * @package HTTP_Request2
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| 38 | * @author Alexey Borzov <avb@php.net>
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| 39 | * @license http://opensource.org/licenses/bsd-license.php New BSD License
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| 40 | * @version CVS: $Id: Socket.php,v 1.2 2008/11/17 12:30:12 avb Exp $
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| 41 | * @link http://pear.php.net/package/HTTP_Request2
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| 42 | */
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| 43 |
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| 44 | /**
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| 45 | * Base class for HTTP_Request2 adapters
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| 46 | */
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| 47 |
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| 48 | function_exists('tubepress_load_classes')
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| 49 | || require(dirname(__FILE__) . '/../../../../../../tubepress_classloader.php');
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| 50 | tubepress_load_classes(array('net_php_pear_HTTP_Request2_Adapter',
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| 51 | 'net_php_pear_HTTP_Request2',
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| 52 | 'net_php_pear_HTTP_Request2_Exception',
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| 53 | 'net_php_pear_HTTP_Request2_Response'));
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| 54 |
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| 55 | /**
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| 56 | * Socket-based adapter for HTTP_Request2
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| 57 | *
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| 58 | * This adapter uses only PHP sockets and will work on almost any PHP
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| 59 | * environment. Code is based on original HTTP_Request PEAR package.
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| 60 | *
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| 61 | * @category HTTP
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| 62 | * @package HTTP_Request2
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| 63 | * @author Alexey Borzov <avb@php.net>
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| 64 | * @version Release: 0.1.0
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| 65 | * @todo Implement HTTPS proxy support via stream_socket_enable_crypto()
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| 66 | * @todo Implement Digest authentication support
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| 67 | * @todo Proper read timeout handling
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| 68 | * @todo Support various SSL options
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| 69 | */
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| 70 | class net_php_pear_HTTP_Request2_Adapter_Socket extends net_php_pear_HTTP_Request2_Adapter
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| 71 | {
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| 72 | /**
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| 73 | * Connected sockets, needed for Keep-Alive support
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| 74 | * @var array
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| 75 | * @see connect()
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| 76 | */
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| 77 | protected static $sockets;
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| 78 |
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| 79 | /**
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| 80 | * Connected socket
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| 81 | * @var resource
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| 82 | * @see connect()
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| 83 | */
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| 84 | protected $socket;
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| 85 |
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| 86 | /**
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| 87 | * Remaining length of the current chunk, when reading chunked response
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| 88 | * @var integer
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| 89 | * @see readChunked()
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| 90 | */
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| 91 | protected $chunkLength = 0;
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| 92 |
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| 93 | /**
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| 94 | * Sends request to the remote server and returns its response
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| 95 | *
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| 96 | * @param HTTP_Request2
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| 97 | * @return net_php_pear_HTTP_Request2_Response
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| 98 | * @throws net_php_pear_HTTP_Request2_Exception
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| 99 | */
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| 100 | public function sendRequest(net_php_pear_HTTP_Request2 $request)
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| 101 | {
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| 102 | $this->request = $request;
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| 103 | $keepAlive = $this->connect();
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| 104 | $headers = $this->prepareHeaders();
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| 105 |
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| 106 | try {
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| 107 | if (false === @fwrite($this->socket, $headers, strlen($headers))) {
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| 108 | throw new net_php_pear_HTTP_Request2_Exception('Error writing request');
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| 109 | }
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| 110 | // provide request headers to the observer, see request #7633
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| 111 | $this->request->setLastEvent('sentHeaders', $headers);
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| 112 | $this->writeBody();
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| 113 |
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| 114 | $response = $this->readResponse();
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| 115 |
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| 116 | // check whether we should keep the connection open
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| 117 | $lengthKnown = 'chunked' == strtolower($response->getHeader('transfer-encoding')) ||
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| 118 | null !== $response->getHeader('content-length');
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| 119 | $persistent = 'keep-alive' == strtolower($response->getHeader('connection')) ||
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| 120 | (null === $response->getHeader('connection') &&
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| 121 | '1.1' == $response->getVersion());
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| 122 | if (!$keepAlive || !$lengthKnown || !$persistent) {
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| 123 | $this->disconnect();
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| 124 | }
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| 125 |
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| 126 | } catch (Exception $e) {
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| 127 | throw $e;
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| 128 | }
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| 129 | return $response;
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| 130 | }
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| 131 |
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| 132 | /**
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| 133 | * Connects to the remote server
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| 134 | *
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| 135 | * @return bool whether the connection can be persistent
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| 136 | * @throws net_php_pear_HTTP_Request2_Exception
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| 137 | */
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| 138 | protected function connect()
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| 139 | {
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| 140 | if ($host = $this->request->getConfigValue('proxy_host')) {
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| 141 | if (!($port = $this->request->getConfigValue('proxy_port'))) {
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| 142 | throw new net_php_pear_HTTP_Request2_Exception('Proxy port not provided');
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| 143 | }
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| 144 | $proxy = true;
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| 145 | } else {
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| 146 | $host = $this->request->getUrl()->getHost();
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| 147 | if (!($port = $this->request->getUrl()->getPort())) {
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| 148 | $port = 0 == strcasecmp(
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| 149 | $this->request->getUrl()->getScheme(), 'https'
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| 150 | )? 443: 80;
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| 151 | }
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| 152 | $proxy = false;
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| 153 | }
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| 154 |
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| 155 | if (0 == strcasecmp($this->request->getUrl()->getScheme(), 'https')) {
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| 156 | if ($proxy) {
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| 157 | throw new net_php_pear_HTTP_Request2_Exception('HTTPS proxy support not yet implemented');
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| 158 | } elseif (!in_array('ssl', stream_get_transports())) {
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| 159 | throw new net_php_pear_HTTP_Request2_Exception('Need OpenSSL support for https:// requests');
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| 160 | }
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| 161 | $host = 'ssl://' . $host;
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| 162 | } else {
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| 163 | $host = 'tcp://' . $host;
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| 164 | }
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| 165 |
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| 166 | $headers = $this->request->getHeaders();
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| 167 |
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| 168 | // RFC 2068, section 19.7.1: A client MUST NOT send the Keep-Alive
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| 169 | // connection token to a proxy server...
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| 170 | if ($proxy && !empty($headers['connection']) && 'Keep-Alive' == $headers['connection'])
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| 171 | {
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| 172 | $this->request->setHeader('connection');
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| 173 | }
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| 174 |
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| 175 | $keepAlive = ('1.1' == $this->request->getConfigValue('protocol_version') &&
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| 176 | empty($headers['connection'])) ||
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| 177 | (!empty($headers['connection']) &&
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| 178 | 'Keep-Alive' == $headers['connection']);
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| 179 | $socketKey = $host . ':' . $port;
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| 180 | unset($this->socket);
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| 181 |
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| 182 | // We use persistent connections and have a connected socket?
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| 183 | if ($keepAlive && !empty(self::$sockets[$socketKey])) {
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| 184 | $this->socket =& self::$sockets[$socketKey];
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| 185 | } else {
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| 186 | $this->socket = stream_socket_client(
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| 187 | $socketKey, $errno, $errstr,
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| 188 | $this->request->getConfigValue('connect_timeout'),
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| 189 | STREAM_CLIENT_CONNECT
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| 190 | );
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| 191 | if (!$this->socket) {
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| 192 | throw new net_php_pear_HTTP_Request2_Exception(
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| 193 | 'Unable to connect to ' . $socketKey . '. Error #' . $errno .
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| 194 | ': ' . $errstr
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| 195 | );
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| 196 | }
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| 197 | $this->request->setLastEvent('connect', $socketKey);
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| 198 | self::$sockets[$socketKey] =& $this->socket;
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| 199 | }
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| 200 | return $keepAlive;
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| 201 | }
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| 202 |
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| 203 | /**
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| 204 | * Disconnects from the remote server
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| 205 | */
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| 206 | protected function disconnect()
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| 207 | {
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| 208 | if (is_resource($this->socket)) {
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| 209 | fclose($this->socket);
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| 210 | $this->socket = null;
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| 211 | $this->request->setLastEvent('disconnect');
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| 212 | }
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| 213 | }
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| 214 |
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| 215 | /**
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| 216 | * Creates the value for '[Proxy-]Authorization:' header
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| 217 | *
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| 218 | * @param string user name
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| 219 | * @param string password
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| 220 | * @param string authentication scheme, one of the HTTP_Request2::AUTH_* constants
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| 221 | * @return string header value
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| 222 | * @throws net_php_pear_HTTP_Request2_Exception
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| 223 | */
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| 224 | protected function createAuthHeader($user, $pass, $scheme)
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| 225 | {
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| 226 | switch ($scheme) {
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| 227 | case net_php_pear_HTTP_Request2::AUTH_BASIC:
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| 228 | return 'Basic ' . base64_encode($user . ':' . $pass);
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| 229 |
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| 230 | case net_php_pear_HTTP_Request2::AUTH_DIGEST:
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| 231 | throw new net_php_pear_HTTP_Request2_Exception('Digest authentication is not implemented yet.');
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| 232 |
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| 233 | default:
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| 234 | throw new net_php_pear_HTTP_Request2_Exception("Unknown HTTP authentication scheme '{$scheme}'");
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| 235 | }
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| 236 | }
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| 237 |
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| 238 | /**
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| 239 | * Creates the string with the Request-Line and request headers
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| 240 | *
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| 241 | * @return string
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| 242 | * @throws net_php_pear_HTTP_Request2_Exception
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| 243 | */
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| 244 | protected function prepareHeaders()
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| 245 | {
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| 246 | $headers = $this->request->getHeaders();
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| 247 | $url = $this->request->getUrl();
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| 248 |
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| 249 | $host = $url->getHost();
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| 250 | if ($port = $url->getPort()) {
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| 251 | $scheme = $url->getScheme();
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| 252 | if ((0 == strcasecmp($scheme, 'http') && 80 != $port) ||
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| 253 | (0 == strcasecmp($scheme, 'https') && 443 != $port)
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| 254 | ) {
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| 255 | $host .= ':' . $port;
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| 256 | }
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| 257 | }
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| 258 | $headers['host'] = $host;
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| 259 |
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| 260 | if (!$this->request->getConfigValue('proxy_host')) {
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| 261 | $requestUrl = '';
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| 262 | } else {
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| 263 | if ($user = $this->request->getConfigValue('proxy_user')) {
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| 264 | $headers['proxy-authorization'] = $this->createAuthHeader(
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| 265 | $user, $this->request->getConfigValue('proxy_password'),
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| 266 | $this->request->getConfigValue('proxy_auth_scheme')
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| 267 | );
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| 268 | }
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| 269 | $requestUrl = $url->getScheme() . '://' . $host;
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| 270 | }
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| 271 | $path = $url->getPath();
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| 272 | $query = $url->getQuery();
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| 273 | $requestUrl .= (empty($path)? '/': $path) . (empty($query)? '': '?' . $query);
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| 274 |
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| 275 | if ($auth = $this->request->getAuth()) {
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| 276 | $headers['authorization'] = $this->createAuthHeader(
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| 277 | $auth['user'], $auth['password'], $auth['scheme']
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| 278 | );
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| 279 | }
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| 280 | if ('1.1' == $this->request->getConfigValue('protocol_version') &&
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| 281 | extension_loaded('zlib') && !isset($headers['accept-encoding'])
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| 282 | ) {
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| 283 | $headers['accept-encoding'] = 'gzip, deflate';
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| 284 | }
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| 285 |
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| 286 | $this->calculateRequestLength($headers);
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| 287 |
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| 288 | $headersStr = $this->request->getMethod() . ' ' . $requestUrl . ' HTTP/' .
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| 289 | $this->request->getConfigValue('protocol_version') . "\r\n";
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| 290 | foreach ($headers as $name => $value) {
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| 291 | $canonicalName = implode('-', array_map('ucfirst', explode('-', $name)));
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| 292 | $headersStr .= $canonicalName . ': ' . $value . "\r\n";
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| 293 | }
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| 294 | return $headersStr . "\r\n";
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| 295 | }
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| 296 |
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| 297 | /**
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| 298 | * Sends the request body
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| 299 | *
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| 300 | * @throws net_php_pear_HTTP_Request2_Exception
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| 301 | */
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| 302 | protected function writeBody()
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| 303 | {
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| 304 | if (in_array($this->request->getMethod(), self::$bodyDisallowed) ||
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| 305 | 0 == $this->contentLength
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| 306 | ) {
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| 307 | return;
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| 308 | }
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| 309 |
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| 310 | $position = 0;
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| 311 | $bufferSize = $this->request->getConfigValue('buffer_size');
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| 312 | while ($position < $this->contentLength) {
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| 313 | if (is_string($this->requestBody)) {
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| 314 | $str = substr($this->requestBody, $position, $bufferSize);
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| 315 | } elseif (is_resource($this->requestBody)) {
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| 316 | $str = fread($this->requestBody, $bufferSize);
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| 317 | } else {
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| 318 | $str = $this->requestBody->read($bufferSize);
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| 319 | }
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| 320 | if (false === @fwrite($this->socket, $str, strlen($str))) {
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| 321 | throw new net_php_pear_HTTP_Request2_Exception('Error writing request');
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| 322 | }
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| 323 | // Provide the length of written string to the observer, request #7630
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| 324 | $this->request->setLastEvent('sentBodyPart', strlen($str));
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| 325 | $position += strlen($str);
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| 326 | }
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| 327 | }
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| 328 |
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| 329 | /**
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| 330 | * Reads the remote server's response
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| 331 | *
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| 332 | * @return net_php_pear_HTTP_Request2_Response
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| 333 | * @throws net_php_pear_HTTP_Request2_Exception
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| 334 | */
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| 335 | protected function readResponse()
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| 336 | {
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| 337 | $bufferSize = $this->request->getConfigValue('buffer_size');
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| 338 |
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| 339 | do {
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| 340 | $response = new net_php_pear_HTTP_Request2_Response($this->readLine($bufferSize), true);
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| 341 | do {
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| 342 | $headerLine = $this->readLine($bufferSize);
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| 343 | $response->parseHeaderLine($headerLine);
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| 344 | } while ('' != $headerLine);
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| 345 | } while (in_array($response->getStatus(), array(100, 101)));
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| 346 |
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| 347 | $this->request->setLastEvent('receivedHeaders', $response);
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| 348 |
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| 349 | // No body possible in such responses
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| 350 | if (net_php_pear_HTTP_Request2::METHOD_HEAD == $this->request->getMethod() ||
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| 351 | in_array($response->getStatus(), array(204, 304))
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| 352 | ) {
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| 353 | return $response;
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| 354 | }
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| 355 |
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| 356 | $chunked = 'chunked' == $response->getHeader('transfer-encoding');
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| 357 | $length = $response->getHeader('content-length');
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| 358 | $hasBody = false;
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| 359 | if ($chunked || null === $length || 0 < intval($length)) {
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| 360 | // RFC 2616, section 4.4:
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| 361 | // 3. ... If a message is received with both a
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| 362 | // Transfer-Encoding header field and a Content-Length header field,
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| 363 | // the latter MUST be ignored.
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| 364 | $toRead = ($chunked || null === $length)? null: $length;
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| 365 | $this->chunkLength = 0;
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| 366 |
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| 367 | while (!feof($this->socket) && (is_null($toRead) || 0 < $toRead)) {
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| 368 | if ($chunked) {
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| 369 | $data = $this->readChunked($bufferSize);
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| 370 | } elseif (is_null($toRead)) {
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| 371 | $data = fread($this->socket, $bufferSize);
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| 372 | } else {
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| 373 | $data = fread($this->socket, min($toRead, $bufferSize));
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| 374 | $toRead -= strlen($data);
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| 375 | }
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| 376 | if ('' == $data && (!$this->chunkLength || feof($this->socket))) {
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| 377 | break;
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| 378 | }
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| 379 |
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| 380 | $hasBody = true;
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| 381 | $response->appendBody($data);
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| 382 | if (!in_array($response->getHeader('content-encoding'), array('identity', null))) {
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| 383 | $this->request->setLastEvent('receivedEncodedBodyPart', $data);
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| 384 | } else {
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| 385 | $this->request->setLastEvent('receivedBodyPart', $data);
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| 386 | }
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| 387 | }
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| 388 | }
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| 389 |
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| 390 | if ($hasBody) {
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| 391 | $this->request->setLastEvent('receivedBody', $response);
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| 392 | }
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| 393 | return $response;
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| 394 | }
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| 395 |
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| 396 | /**
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| 397 | * Reads until either the end of the socket or a newline, whichever comes first
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| 398 | *
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| 399 | * Strips the trailing newline from the returned data. Method borrowed from
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| 400 | * Net_Socket PEAR package.
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| 401 | *
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| 402 | * @param int buffer size to use for reading
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| 403 | * @return Available data up to the newline (not including newline)
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| 404 | */
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| 405 | protected function readLine($bufferSize)
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| 406 | {
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| 407 | $line = '';
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| 408 | while (!feof($this->socket)) {
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| 409 | $line .= @fgets($this->socket, $bufferSize);
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| 410 | if (substr($line, -1) == "\n") {
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| 411 | return rtrim($line, "\r\n");
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| 412 | }
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| 413 | }
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| 414 | return $line;
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| 415 | }
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| 416 |
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| 417 | /**
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| 418 | * Reads a part of response body encoded with chunked Transfer-Encoding
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| 419 | *
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| 420 | * @param int buffer size to use for reading
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| 421 | * @return string
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| 422 | * @throws net_php_pear_HTTP_Request2_Exception
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| 423 | */
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| 424 | protected function readChunked($bufferSize)
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| 425 | {
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| 426 | // at start of the next chunk?
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| 427 | if (0 == $this->chunkLength) {
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| 428 | $line = $this->readLine($bufferSize);
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| 429 | if (!preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
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| 430 | throw new net_php_pear_HTTP_Request2_Exception(
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| 431 | "Cannot decode chunked response, invalid chunk length '{$line}'"
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| 432 | );
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| 433 | } else {
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| 434 | $this->chunkLength = hexdec($matches[1]);
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| 435 | // Chunk with zero length indicates the end
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| 436 | if (0 == $this->chunkLength) {
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| 437 | $this->readLine($bufferSize);
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| 438 | return '';
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| 439 | }
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| 440 | }
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| 441 | }
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| 442 | $data = fread($this->socket, min($this->chunkLength, $bufferSize));
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| 443 | $this->chunkLength -= strlen($data);
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| 444 | if (0 == $this->chunkLength) {
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| 445 | $this->readLine($bufferSize); // Trailing CRLF
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| 446 | }
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| 447 | return $data;
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| 448 | }
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| 449 | }
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| 450 |
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| 451 | ?> |
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