0
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1 <?php
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2 /**
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3 * Net_Socket
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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) 1997-2017 The PHP Group
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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 * o 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 * o 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 *
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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33 *
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34 * @category Net
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35 * @package Net_Socket
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36 * @author Stig Bakken <ssb@php.net>
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37 * @author Chuck Hagenbuch <chuck@horde.org>
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38 * @copyright 1997-2017 The PHP Group
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39 * @license http://opensource.org/licenses/bsd-license.php BSD-2-Clause
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40 * @link http://pear.php.net/packages/Net_Socket
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41 */
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42
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43 require_once 'PEAR.php';
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44
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45 define('NET_SOCKET_READ', 1);
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46 define('NET_SOCKET_WRITE', 2);
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47 define('NET_SOCKET_ERROR', 4);
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48
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49 /**
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50 * Generalized Socket class.
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51 *
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52 * @category Net
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53 * @package Net_Socket
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54 * @author Stig Bakken <ssb@php.net>
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55 * @author Chuck Hagenbuch <chuck@horde.org>
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56 * @copyright 1997-2017 The PHP Group
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57 * @license http://opensource.org/licenses/bsd-license.php BSD-2-Clause
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58 * @link http://pear.php.net/packages/Net_Socket
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59 */
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60 class Net_Socket extends PEAR
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61 {
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62 /**
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63 * Socket file pointer.
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64 * @var resource $fp
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65 */
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66 public $fp = null;
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67
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68 /**
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69 * Whether the socket is blocking. Defaults to true.
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70 * @var boolean $blocking
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71 */
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72 public $blocking = true;
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73
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74 /**
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75 * Whether the socket is persistent. Defaults to false.
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76 * @var boolean $persistent
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77 */
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78 public $persistent = false;
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79
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80 /**
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81 * The IP address to connect to.
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82 * @var string $addr
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83 */
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84 public $addr = '';
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85
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86 /**
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87 * The port number to connect to.
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88 * @var integer $port
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89 */
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90 public $port = 0;
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91
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92 /**
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93 * Number of seconds to wait on socket operations before assuming
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94 * there's no more data. Defaults to no timeout.
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95 * @var integer|float $timeout
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96 */
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97 public $timeout = null;
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98
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99 /**
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100 * Number of bytes to read at a time in readLine() and
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101 * readAll(). Defaults to 2048.
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102 * @var integer $lineLength
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103 */
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104 public $lineLength = 2048;
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105
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106 /**
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107 * The string to use as a newline terminator. Usually "\r\n" or "\n".
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108 * @var string $newline
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109 */
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110 public $newline = "\r\n";
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111
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112 /**
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113 * Connect to the specified port. If called when the socket is
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114 * already connected, it disconnects and connects again.
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115 *
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116 * @param string $addr IP address or host name (may be with protocol prefix).
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117 * @param integer $port TCP port number.
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118 * @param boolean $persistent (optional) Whether the connection is
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119 * persistent (kept open between requests
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120 * by the web server).
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121 * @param integer $timeout (optional) Connection socket timeout.
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122 * @param array $options See options for stream_context_create.
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123 *
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124 * @access public
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125 *
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126 * @return boolean|PEAR_Error True on success or a PEAR_Error on failure.
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127 */
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128 public function connect(
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129 $addr,
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130 $port = 0,
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131 $persistent = null,
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132 $timeout = null,
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133 $options = null
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134 ) {
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135 if (is_resource($this->fp)) {
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136 @fclose($this->fp);
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137 $this->fp = null;
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138 }
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139
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140 if (!$addr) {
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141 return $this->raiseError('$addr cannot be empty');
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142 } else {
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143 if (strspn($addr, ':.0123456789') === strlen($addr)) {
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144 $this->addr = strpos($addr, ':') !== false ? '[' . $addr . ']' : $addr;
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145 } else {
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146 $this->addr = $addr;
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147 }
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148 }
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149
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150 $this->port = $port % 65536;
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151
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152 if ($persistent !== null) {
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153 $this->persistent = $persistent;
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154 }
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155
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156 $openfunc = $this->persistent ? 'pfsockopen' : 'fsockopen';
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157 $errno = 0;
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158 $errstr = '';
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159
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160 $old_track_errors = @ini_set('track_errors', 1);
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161
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162 if ($timeout <= 0) {
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163 $timeout = @ini_get('default_socket_timeout');
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164 }
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165
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166 if ($options && function_exists('stream_context_create')) {
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167 $context = stream_context_create($options);
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168
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169 // Since PHP 5 fsockopen doesn't allow context specification
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170 if (function_exists('stream_socket_client')) {
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171 $flags = STREAM_CLIENT_CONNECT;
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172
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173 if ($this->persistent) {
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174 $flags = STREAM_CLIENT_PERSISTENT;
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175 }
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176
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177 $addr = $this->addr . ':' . $this->port;
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178 $fp = @stream_socket_client($addr, $errno, $errstr,
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179 $timeout, $flags, $context);
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180 } else {
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181 $fp = @$openfunc($this->addr, $this->port, $errno,
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182 $errstr, $timeout, $context);
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183 }
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184 } else {
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185 $fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $timeout);
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186 }
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187
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188 if (!$fp) {
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189 if ($errno === 0 && !strlen($errstr) && isset($php_errormsg)) {
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190 $errstr = $php_errormsg;
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191 }
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192 @ini_set('track_errors', $old_track_errors);
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193
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194 return $this->raiseError($errstr, $errno);
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195 }
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196
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197 @ini_set('track_errors', $old_track_errors);
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198 $this->fp = $fp;
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199 $this->setTimeout();
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200
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201 return $this->setBlocking($this->blocking);
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202 }
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203
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204 /**
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205 * Disconnects from the peer, closes the socket.
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206 *
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207 * @access public
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208 * @return mixed true on success or a PEAR_Error instance otherwise
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209 */
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210 public function disconnect()
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211 {
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212 if (!is_resource($this->fp)) {
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213 return $this->raiseError('not connected');
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214 }
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215
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216 @fclose($this->fp);
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217 $this->fp = null;
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218
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219 return true;
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220 }
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221
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222 /**
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223 * Set the newline character/sequence to use.
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224 *
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225 * @param string $newline Newline character(s)
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226 * @return boolean True
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227 */
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228 public function setNewline($newline)
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229 {
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230 $this->newline = $newline;
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231
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232 return true;
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233 }
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234
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235 /**
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236 * Find out if the socket is in blocking mode.
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237 *
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238 * @access public
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239 * @return boolean The current blocking mode.
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240 */
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241 public function isBlocking()
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242 {
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243 return $this->blocking;
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244 }
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245
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246 /**
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247 * Sets whether the socket connection should be blocking or
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248 * not. A read call to a non-blocking socket will return immediately
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249 * if there is no data available, whereas it will block until there
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250 * is data for blocking sockets.
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251 *
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252 * @param boolean $mode True for blocking sockets, false for nonblocking.
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253 *
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254 * @access public
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255 * @return mixed true on success or a PEAR_Error instance otherwise
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256 */
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257 public function setBlocking($mode)
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258 {
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259 if (!is_resource($this->fp)) {
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260 return $this->raiseError('not connected');
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261 }
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262
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263 $this->blocking = $mode;
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264 stream_set_blocking($this->fp, (int)$this->blocking);
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265
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266 return true;
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267 }
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268
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269 /**
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270 * Sets the timeout value on socket descriptor,
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271 * expressed in the sum of seconds and microseconds
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272 *
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273 * @param integer $seconds Seconds.
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274 * @param integer $microseconds Microseconds, optional.
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275 *
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276 * @access public
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277 * @return mixed True on success or false on failure or
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278 * a PEAR_Error instance when not connected
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279 */
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280 public function setTimeout($seconds = null, $microseconds = null)
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281 {
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282 if (!is_resource($this->fp)) {
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283 return $this->raiseError('not connected');
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284 }
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285
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286 if ($seconds === null && $microseconds === null) {
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287 $seconds = (int)$this->timeout;
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288 $microseconds = (int)(($this->timeout - $seconds) * 1000000);
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289 } else {
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290 $this->timeout = $seconds + $microseconds / 1000000;
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291 }
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292
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293 if ($this->timeout > 0) {
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294 return stream_set_timeout($this->fp, (int)$seconds, (int)$microseconds);
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295 } else {
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296 return false;
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297 }
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298 }
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299
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300 /**
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301 * Sets the file buffering size on the stream.
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302 * See php's stream_set_write_buffer for more information.
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303 *
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304 * @param integer $size Write buffer size.
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305 *
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306 * @access public
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307 * @return mixed on success or an PEAR_Error object otherwise
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308 */
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309 public function setWriteBuffer($size)
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310 {
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311 if (!is_resource($this->fp)) {
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312 return $this->raiseError('not connected');
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313 }
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314
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315 $returned = stream_set_write_buffer($this->fp, $size);
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316 if ($returned === 0) {
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317 return true;
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318 }
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319
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320 return $this->raiseError('Cannot set write buffer.');
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321 }
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322
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323 /**
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324 * Returns information about an existing socket resource.
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325 * Currently returns four entries in the result array:
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326 *
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327 * <p>
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328 * timed_out (bool) - The socket timed out waiting for data<br>
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329 * blocked (bool) - The socket was blocked<br>
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330 * eof (bool) - Indicates EOF event<br>
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331 * unread_bytes (int) - Number of bytes left in the socket buffer<br>
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332 * </p>
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333 *
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334 * @access public
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335 * @return mixed Array containing information about existing socket
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336 * resource or a PEAR_Error instance otherwise
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337 */
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338 public function getStatus()
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339 {
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340 if (!is_resource($this->fp)) {
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341 return $this->raiseError('not connected');
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342 }
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343
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344 return stream_get_meta_data($this->fp);
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345 }
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346
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347 /**
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348 * Get a specified line of data
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349 *
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350 * @param int $size Reading ends when size - 1 bytes have been read,
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351 * or a newline or an EOF (whichever comes first).
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352 * If no size is specified, it will keep reading from
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353 * the stream until it reaches the end of the line.
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354 *
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355 * @access public
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356 * @return mixed $size bytes of data from the socket, or a PEAR_Error if
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357 * not connected. If an error occurs, FALSE is returned.
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358 */
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359 public function gets($size = null)
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360 {
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361 if (!is_resource($this->fp)) {
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362 return $this->raiseError('not connected');
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363 }
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364
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365 if (null === $size) {
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366 return @fgets($this->fp);
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367 } else {
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368 return @fgets($this->fp, $size);
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369 }
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370 }
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371
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372 /**
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373 * Read a specified amount of data. This is guaranteed to return,
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374 * and has the added benefit of getting everything in one fread()
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375 * chunk; if you know the size of the data you're getting
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376 * beforehand, this is definitely the way to go.
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377 *
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378 * @param integer $size The number of bytes to read from the socket.
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379 *
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380 * @access public
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381 * @return string $size bytes of data from the socket, or a PEAR_Error if
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382 * not connected.
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383 */
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384 public function read($size)
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385 {
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386 if (!is_resource($this->fp)) {
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387 return $this->raiseError('not connected');
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388 }
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389
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390 return @fread($this->fp, $size);
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391 }
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392
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393 /**
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394 * Write a specified amount of data.
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395 *
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396 * @param string $data Data to write.
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397 * @param integer $blocksize Amount of data to write at once.
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398 * NULL means all at once.
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399 *
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400 * @access public
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401 * @return mixed If the socket is not connected, returns an instance of
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402 * PEAR_Error.
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403 * If the write succeeds, returns the number of bytes written.
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404 * If the write fails, returns false.
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405 * If the socket times out, returns an instance of PEAR_Error.
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406 */
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407 public function write($data, $blocksize = null)
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408 {
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409 if (!is_resource($this->fp)) {
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410 return $this->raiseError('not connected');
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411 }
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412
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413 if (null === $blocksize && !OS_WINDOWS) {
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414 $written = @fwrite($this->fp, $data);
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415
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416 // Check for timeout or lost connection
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417 if ($written === false) {
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418 $meta_data = $this->getStatus();
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419
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420 if (!is_array($meta_data)) {
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421 return $meta_data; // PEAR_Error
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422 }
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423
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424 if (!empty($meta_data['timed_out'])) {
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425 return $this->raiseError('timed out');
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426 }
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427 }
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428
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429 return $written;
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430 } else {
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431 if (null === $blocksize) {
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432 $blocksize = 1024;
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433 }
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434
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435 $pos = 0;
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436 $size = strlen($data);
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437 while ($pos < $size) {
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438 $written = @fwrite($this->fp, substr($data, $pos, $blocksize));
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439
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440 // Check for timeout or lost connection
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441 if ($written === false) {
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442 $meta_data = $this->getStatus();
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443
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444 if (!is_array($meta_data)) {
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445 return $meta_data; // PEAR_Error
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446 }
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447
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448 if (!empty($meta_data['timed_out'])) {
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449 return $this->raiseError('timed out');
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450 }
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451
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452 return $written;
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453 }
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454
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455 $pos += $written;
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456 }
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457
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458 return $pos;
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459 }
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460 }
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461
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462 /**
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463 * Write a line of data to the socket, followed by a trailing newline.
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464 *
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465 * @param string $data Data to write
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466 *
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467 * @access public
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468 * @return mixed fwrite() result, or PEAR_Error when not connected
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469 */
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470 public function writeLine($data)
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471 {
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472 if (!is_resource($this->fp)) {
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473 return $this->raiseError('not connected');
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474 }
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475
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476 return fwrite($this->fp, $data . $this->newline);
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477 }
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478
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479 /**
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480 * Tests for end-of-file on a socket descriptor.
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481 *
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482 * Also returns true if the socket is disconnected.
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483 *
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484 * @access public
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485 * @return bool
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486 */
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487 public function eof()
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488 {
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489 return (!is_resource($this->fp) || feof($this->fp));
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490 }
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491
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492 /**
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493 * Reads a byte of data
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494 *
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495 * @access public
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496 * @return integer 1 byte of data from the socket, or a PEAR_Error if
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497 * not connected.
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498 */
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499 public function readByte()
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500 {
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501 if (!is_resource($this->fp)) {
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502 return $this->raiseError('not connected');
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503 }
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504
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505 return ord(@fread($this->fp, 1));
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506 }
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507
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508 /**
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509 * Reads a word of data
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510 *
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511 * @access public
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512 * @return integer 1 word of data from the socket, or a PEAR_Error if
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513 * not connected.
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514 */
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515 public function readWord()
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516 {
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517 if (!is_resource($this->fp)) {
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518 return $this->raiseError('not connected');
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519 }
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520
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521 $buf = @fread($this->fp, 2);
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522
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523 return (ord($buf[0]) + (ord($buf[1]) << 8));
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524 }
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525
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526 /**
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527 * Reads an int of data
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528 *
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529 * @access public
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530 * @return integer 1 int of data from the socket, or a PEAR_Error if
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531 * not connected.
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532 */
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533 public function readInt()
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534 {
|
|
535 if (!is_resource($this->fp)) {
|
|
536 return $this->raiseError('not connected');
|
|
537 }
|
|
538
|
|
539 $buf = @fread($this->fp, 4);
|
|
540
|
|
541 return (ord($buf[0]) + (ord($buf[1]) << 8) +
|
|
542 (ord($buf[2]) << 16) + (ord($buf[3]) << 24));
|
|
543 }
|
|
544
|
|
545 /**
|
|
546 * Reads a zero-terminated string of data
|
|
547 *
|
|
548 * @access public
|
|
549 * @return string, or a PEAR_Error if
|
|
550 * not connected.
|
|
551 */
|
|
552 public function readString()
|
|
553 {
|
|
554 if (!is_resource($this->fp)) {
|
|
555 return $this->raiseError('not connected');
|
|
556 }
|
|
557
|
|
558 $string = '';
|
|
559 while (($char = @fread($this->fp, 1)) !== "\x00") {
|
|
560 $string .= $char;
|
|
561 }
|
|
562
|
|
563 return $string;
|
|
564 }
|
|
565
|
|
566 /**
|
|
567 * Reads an IP Address and returns it in a dot formatted string
|
|
568 *
|
|
569 * @access public
|
|
570 * @return string Dot formatted string, or a PEAR_Error if
|
|
571 * not connected.
|
|
572 */
|
|
573 public function readIPAddress()
|
|
574 {
|
|
575 if (!is_resource($this->fp)) {
|
|
576 return $this->raiseError('not connected');
|
|
577 }
|
|
578
|
|
579 $buf = @fread($this->fp, 4);
|
|
580
|
|
581 return sprintf('%d.%d.%d.%d', ord($buf[0]), ord($buf[1]),
|
|
582 ord($buf[2]), ord($buf[3]));
|
|
583 }
|
|
584
|
|
585 /**
|
|
586 * Read until either the end of the socket or a newline, whichever
|
|
587 * comes first. Strips the trailing newline from the returned data.
|
|
588 *
|
|
589 * @access public
|
|
590 * @return string All available data up to a newline, without that
|
|
591 * newline, or until the end of the socket, or a PEAR_Error if
|
|
592 * not connected.
|
|
593 */
|
|
594 public function readLine()
|
|
595 {
|
|
596 if (!is_resource($this->fp)) {
|
|
597 return $this->raiseError('not connected');
|
|
598 }
|
|
599
|
|
600 $line = '';
|
|
601
|
|
602 $timeout = time() + $this->timeout;
|
|
603
|
|
604 while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
|
|
605 $line .= @fgets($this->fp, $this->lineLength);
|
|
606 if (substr($line, -1) == "\n") {
|
|
607 return rtrim($line, $this->newline);
|
|
608 }
|
|
609 }
|
|
610
|
|
611 return $line;
|
|
612 }
|
|
613
|
|
614 /**
|
|
615 * Read until the socket closes, or until there is no more data in
|
|
616 * the inner PHP buffer. If the inner buffer is empty, in blocking
|
|
617 * mode we wait for at least 1 byte of data. Therefore, in
|
|
618 * blocking mode, if there is no data at all to be read, this
|
|
619 * function will never exit (unless the socket is closed on the
|
|
620 * remote end).
|
|
621 *
|
|
622 * @access public
|
|
623 *
|
|
624 * @return string All data until the socket closes, or a PEAR_Error if
|
|
625 * not connected.
|
|
626 */
|
|
627 public function readAll()
|
|
628 {
|
|
629 if (!is_resource($this->fp)) {
|
|
630 return $this->raiseError('not connected');
|
|
631 }
|
|
632
|
|
633 $data = '';
|
|
634 $timeout = time() + $this->timeout;
|
|
635
|
|
636 while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
|
|
637 $data .= @fread($this->fp, $this->lineLength);
|
|
638 }
|
|
639
|
|
640 return $data;
|
|
641 }
|
|
642
|
|
643 /**
|
|
644 * Runs the equivalent of the select() system call on the socket
|
|
645 * with a timeout specified by tv_sec and tv_usec.
|
|
646 *
|
|
647 * @param integer $state Which of read/write/error to check for.
|
|
648 * @param integer $tv_sec Number of seconds for timeout.
|
|
649 * @param integer $tv_usec Number of microseconds for timeout.
|
|
650 *
|
|
651 * @access public
|
|
652 * @return False if select fails, integer describing which of read/write/error
|
|
653 * are ready, or PEAR_Error if not connected.
|
|
654 */
|
|
655 public function select($state, $tv_sec, $tv_usec = 0)
|
|
656 {
|
|
657 if (!is_resource($this->fp)) {
|
|
658 return $this->raiseError('not connected');
|
|
659 }
|
|
660
|
|
661 $read = null;
|
|
662 $write = null;
|
|
663 $except = null;
|
|
664 if ($state & NET_SOCKET_READ) {
|
|
665 $read[] = $this->fp;
|
|
666 }
|
|
667 if ($state & NET_SOCKET_WRITE) {
|
|
668 $write[] = $this->fp;
|
|
669 }
|
|
670 if ($state & NET_SOCKET_ERROR) {
|
|
671 $except[] = $this->fp;
|
|
672 }
|
|
673 if (false === ($sr = stream_select($read, $write, $except,
|
|
674 $tv_sec, $tv_usec))
|
|
675 ) {
|
|
676 return false;
|
|
677 }
|
|
678
|
|
679 $result = 0;
|
|
680 if (count($read)) {
|
|
681 $result |= NET_SOCKET_READ;
|
|
682 }
|
|
683 if (count($write)) {
|
|
684 $result |= NET_SOCKET_WRITE;
|
|
685 }
|
|
686 if (count($except)) {
|
|
687 $result |= NET_SOCKET_ERROR;
|
|
688 }
|
|
689
|
|
690 return $result;
|
|
691 }
|
|
692
|
|
693 /**
|
|
694 * Turns encryption on/off on a connected socket.
|
|
695 *
|
|
696 * @param bool $enabled Set this parameter to true to enable encryption
|
|
697 * and false to disable encryption.
|
|
698 * @param integer $type Type of encryption. See stream_socket_enable_crypto()
|
|
699 * for values.
|
|
700 *
|
|
701 * @see http://se.php.net/manual/en/function.stream-socket-enable-crypto.php
|
|
702 * @access public
|
|
703 * @return false on error, true on success and 0 if there isn't enough data
|
|
704 * and the user should try again (non-blocking sockets only).
|
|
705 * A PEAR_Error object is returned if the socket is not
|
|
706 * connected
|
|
707 */
|
|
708 public function enableCrypto($enabled, $type)
|
|
709 {
|
|
710 if (version_compare(phpversion(), '5.1.0', '>=')) {
|
|
711 if (!is_resource($this->fp)) {
|
|
712 return $this->raiseError('not connected');
|
|
713 }
|
|
714
|
|
715 return @stream_socket_enable_crypto($this->fp, $enabled, $type);
|
|
716 } else {
|
|
717 $msg = 'Net_Socket::enableCrypto() requires php version >= 5.1.0';
|
|
718
|
|
719 return $this->raiseError($msg);
|
|
720 }
|
|
721 }
|
|
722
|
|
723 }
|