forked from GNUsocial/gnu-social
593 lines
18 KiB
PHP
593 lines
18 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2003 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Stig Bakken <ssb@php.net> |
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// | Chuck Hagenbuch <chuck@horde.org> |
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// +----------------------------------------------------------------------+
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//
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// $Id: Socket.php,v 1.38 2008/02/15 18:24:17 chagenbu Exp $
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require_once 'PEAR.php';
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define('NET_SOCKET_READ', 1);
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define('NET_SOCKET_WRITE', 2);
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define('NET_SOCKET_ERROR', 4);
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/**
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* Generalized Socket class.
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*
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* @version 1.1
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* @author Stig Bakken <ssb@php.net>
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* @author Chuck Hagenbuch <chuck@horde.org>
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*/
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class Net_Socket extends PEAR {
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/**
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* Socket file pointer.
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* @var resource $fp
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*/
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var $fp = null;
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/**
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* Whether the socket is blocking. Defaults to true.
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* @var boolean $blocking
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*/
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var $blocking = true;
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/**
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* Whether the socket is persistent. Defaults to false.
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* @var boolean $persistent
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*/
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var $persistent = false;
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/**
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* The IP address to connect to.
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* @var string $addr
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*/
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var $addr = '';
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/**
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* The port number to connect to.
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* @var integer $port
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*/
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var $port = 0;
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/**
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* Number of seconds to wait on socket connections before assuming
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* there's no more data. Defaults to no timeout.
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* @var integer $timeout
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*/
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var $timeout = false;
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/**
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* Number of bytes to read at a time in readLine() and
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* readAll(). Defaults to 2048.
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* @var integer $lineLength
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*/
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var $lineLength = 2048;
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/**
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* Connect to the specified port. If called when the socket is
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* already connected, it disconnects and connects again.
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*
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* @param string $addr IP address or host name.
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* @param integer $port TCP port number.
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* @param boolean $persistent (optional) Whether the connection is
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* persistent (kept open between requests
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* by the web server).
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* @param integer $timeout (optional) How long to wait for data.
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* @param array $options See options for stream_context_create.
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*
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* @access public
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*
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* @return boolean | PEAR_Error True on success or a PEAR_Error on failure.
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*/
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function connect($addr, $port = 0, $persistent = null, $timeout = null, $options = null)
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{
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if (is_resource($this->fp)) {
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@fclose($this->fp);
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$this->fp = null;
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}
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if (!$addr) {
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return $this->raiseError('$addr cannot be empty');
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} elseif (strspn($addr, '.0123456789') == strlen($addr) ||
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strstr($addr, '/') !== false) {
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$this->addr = $addr;
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} else {
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$this->addr = @gethostbyname($addr);
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}
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$this->port = $port % 65536;
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if ($persistent !== null) {
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$this->persistent = $persistent;
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}
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if ($timeout !== null) {
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$this->timeout = $timeout;
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}
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$openfunc = $this->persistent ? 'pfsockopen' : 'fsockopen';
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$errno = 0;
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$errstr = '';
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$old_track_errors = @ini_set('track_errors', 1);
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if ($options && function_exists('stream_context_create')) {
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if ($this->timeout) {
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$timeout = $this->timeout;
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} else {
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$timeout = 0;
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}
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$context = stream_context_create($options);
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// Since PHP 5 fsockopen doesn't allow context specification
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if (function_exists('stream_socket_client')) {
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$flags = $this->persistent ? STREAM_CLIENT_PERSISTENT : STREAM_CLIENT_CONNECT;
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$addr = $this->addr . ':' . $this->port;
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$fp = stream_socket_client($addr, $errno, $errstr, $timeout, $flags, $context);
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} else {
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$fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $timeout, $context);
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}
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} else {
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if ($this->timeout) {
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$fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $this->timeout);
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} else {
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$fp = @$openfunc($this->addr, $this->port, $errno, $errstr);
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}
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}
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if (!$fp) {
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if ($errno == 0 && isset($php_errormsg)) {
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$errstr = $php_errormsg;
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}
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@ini_set('track_errors', $old_track_errors);
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return $this->raiseError($errstr, $errno);
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}
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@ini_set('track_errors', $old_track_errors);
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$this->fp = $fp;
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return $this->setBlocking($this->blocking);
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}
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/**
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* Disconnects from the peer, closes the socket.
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*
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* @access public
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* @return mixed true on success or a PEAR_Error instance otherwise
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*/
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function disconnect()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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@fclose($this->fp);
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$this->fp = null;
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return true;
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}
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/**
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* Find out if the socket is in blocking mode.
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*
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* @access public
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* @return boolean The current blocking mode.
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*/
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function isBlocking()
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{
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return $this->blocking;
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}
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/**
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* Sets whether the socket connection should be blocking or
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* not. A read call to a non-blocking socket will return immediately
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* if there is no data available, whereas it will block until there
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* is data for blocking sockets.
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*
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* @param boolean $mode True for blocking sockets, false for nonblocking.
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* @access public
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* @return mixed true on success or a PEAR_Error instance otherwise
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*/
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function setBlocking($mode)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$this->blocking = $mode;
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socket_set_blocking($this->fp, $this->blocking);
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return true;
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}
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/**
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* Sets the timeout value on socket descriptor,
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* expressed in the sum of seconds and microseconds
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*
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* @param integer $seconds Seconds.
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* @param integer $microseconds Microseconds.
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* @access public
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* @return mixed true on success or a PEAR_Error instance otherwise
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*/
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function setTimeout($seconds, $microseconds)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return socket_set_timeout($this->fp, $seconds, $microseconds);
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}
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/**
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* Sets the file buffering size on the stream.
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* See php's stream_set_write_buffer for more information.
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*
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* @param integer $size Write buffer size.
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* @access public
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* @return mixed on success or an PEAR_Error object otherwise
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*/
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function setWriteBuffer($size)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$returned = stream_set_write_buffer($this->fp, $size);
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if ($returned == 0) {
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return true;
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}
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return $this->raiseError('Cannot set write buffer.');
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}
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/**
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* Returns information about an existing socket resource.
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* Currently returns four entries in the result array:
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*
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* <p>
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* timed_out (bool) - The socket timed out waiting for data<br>
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* blocked (bool) - The socket was blocked<br>
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* eof (bool) - Indicates EOF event<br>
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* unread_bytes (int) - Number of bytes left in the socket buffer<br>
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* </p>
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*
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* @access public
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* @return mixed Array containing information about existing socket resource or a PEAR_Error instance otherwise
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*/
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function getStatus()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return socket_get_status($this->fp);
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}
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/**
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* Get a specified line of data
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*
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* @access public
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* @return $size bytes of data from the socket, or a PEAR_Error if
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* not connected.
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*/
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function gets($size)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return @fgets($this->fp, $size);
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}
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/**
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* Read a specified amount of data. This is guaranteed to return,
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* and has the added benefit of getting everything in one fread()
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* chunk; if you know the size of the data you're getting
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* beforehand, this is definitely the way to go.
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*
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* @param integer $size The number of bytes to read from the socket.
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* @access public
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* @return $size bytes of data from the socket, or a PEAR_Error if
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* not connected.
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*/
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function read($size)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return @fread($this->fp, $size);
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}
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/**
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* Write a specified amount of data.
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*
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* @param string $data Data to write.
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* @param integer $blocksize Amount of data to write at once.
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* NULL means all at once.
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*
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* @access public
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* @return mixed If the socket is not connected, returns an instance of PEAR_Error
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* If the write succeeds, returns the number of bytes written
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* If the write fails, returns false.
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*/
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function write($data, $blocksize = null)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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if (is_null($blocksize) && !OS_WINDOWS) {
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return @fwrite($this->fp, $data);
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} else {
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if (is_null($blocksize)) {
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$blocksize = 1024;
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}
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$pos = 0;
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$size = strlen($data);
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while ($pos < $size) {
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$written = @fwrite($this->fp, substr($data, $pos, $blocksize));
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if ($written === false) {
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return false;
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}
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$pos += $written;
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}
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return $pos;
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}
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}
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/**
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* Write a line of data to the socket, followed by a trailing "\r\n".
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*
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* @access public
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* @return mixed fputs result, or an error
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*/
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function writeLine($data)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return fwrite($this->fp, $data . "\r\n");
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}
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/**
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* Tests for end-of-file on a socket descriptor.
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*
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* Also returns true if the socket is disconnected.
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*
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* @access public
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* @return bool
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*/
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function eof()
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{
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return (!is_resource($this->fp) || feof($this->fp));
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}
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/**
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* Reads a byte of data
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*
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* @access public
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* @return 1 byte of data from the socket, or a PEAR_Error if
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* not connected.
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*/
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function readByte()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return ord(@fread($this->fp, 1));
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}
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/**
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* Reads a word of data
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*
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* @access public
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* @return 1 word of data from the socket, or a PEAR_Error if
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* not connected.
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*/
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function readWord()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$buf = @fread($this->fp, 2);
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return (ord($buf[0]) + (ord($buf[1]) << 8));
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}
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/**
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* Reads an int of data
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*
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* @access public
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* @return integer 1 int of data from the socket, or a PEAR_Error if
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* not connected.
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*/
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function readInt()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$buf = @fread($this->fp, 4);
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return (ord($buf[0]) + (ord($buf[1]) << 8) +
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(ord($buf[2]) << 16) + (ord($buf[3]) << 24));
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}
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/**
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* Reads a zero-terminated string of data
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*
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* @access public
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* @return string, or a PEAR_Error if
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* not connected.
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*/
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function readString()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$string = '';
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while (($char = @fread($this->fp, 1)) != "\x00") {
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$string .= $char;
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}
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return $string;
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}
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/**
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* Reads an IP Address and returns it in a dot formatted string
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*
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* @access public
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* @return Dot formatted string, or a PEAR_Error if
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* not connected.
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*/
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function readIPAddress()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$buf = @fread($this->fp, 4);
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return sprintf('%d.%d.%d.%d', ord($buf[0]), ord($buf[1]),
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ord($buf[2]), ord($buf[3]));
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}
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/**
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* Read until either the end of the socket or a newline, whichever
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* comes first. Strips the trailing newline from the returned data.
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*
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* @access public
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* @return All available data up to a newline, without that
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* newline, or until the end of the socket, or a PEAR_Error if
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* not connected.
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*/
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function readLine()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$line = '';
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$timeout = time() + $this->timeout;
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while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
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$line .= @fgets($this->fp, $this->lineLength);
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if (substr($line, -1) == "\n") {
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return rtrim($line, "\r\n");
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}
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}
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return $line;
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}
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/**
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* Read until the socket closes, or until there is no more data in
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* the inner PHP buffer. If the inner buffer is empty, in blocking
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* mode we wait for at least 1 byte of data. Therefore, in
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* blocking mode, if there is no data at all to be read, this
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* function will never exit (unless the socket is closed on the
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* remote end).
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*
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* @access public
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*
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* @return string All data until the socket closes, or a PEAR_Error if
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* not connected.
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*/
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function readAll()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$data = '';
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while (!feof($this->fp)) {
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$data .= @fread($this->fp, $this->lineLength);
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}
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return $data;
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}
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/**
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* Runs the equivalent of the select() system call on the socket
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* with a timeout specified by tv_sec and tv_usec.
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*
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* @param integer $state Which of read/write/error to check for.
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* @param integer $tv_sec Number of seconds for timeout.
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* @param integer $tv_usec Number of microseconds for timeout.
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*
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* @access public
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* @return False if select fails, integer describing which of read/write/error
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* are ready, or PEAR_Error if not connected.
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*/
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function select($state, $tv_sec, $tv_usec = 0)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$read = null;
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$write = null;
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$except = null;
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if ($state & NET_SOCKET_READ) {
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$read[] = $this->fp;
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}
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if ($state & NET_SOCKET_WRITE) {
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$write[] = $this->fp;
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}
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if ($state & NET_SOCKET_ERROR) {
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$except[] = $this->fp;
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}
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if (false === ($sr = stream_select($read, $write, $except, $tv_sec, $tv_usec))) {
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return false;
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}
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$result = 0;
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if (count($read)) {
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$result |= NET_SOCKET_READ;
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}
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if (count($write)) {
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$result |= NET_SOCKET_WRITE;
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}
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if (count($except)) {
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$result |= NET_SOCKET_ERROR;
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}
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return $result;
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}
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/**
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* Turns encryption on/off on a connected socket.
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*
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* @param bool $enabled Set this parameter to true to enable encryption
|
|
* and false to disable encryption.
|
|
* @param integer $type Type of encryption. See
|
|
* http://se.php.net/manual/en/function.stream-socket-enable-crypto.php for values.
|
|
*
|
|
* @access public
|
|
* @return false on error, true on success and 0 if there isn't enough data and the
|
|
* user should try again (non-blocking sockets only). A PEAR_Error object
|
|
* is returned if the socket is not connected
|
|
*/
|
|
function enableCrypto($enabled, $type)
|
|
{
|
|
if (version_compare(phpversion(), "5.1.0", ">=")) {
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
return @stream_socket_enable_crypto($this->fp, $enabled, $type);
|
|
} else {
|
|
return $this->raiseError('Net_Socket::enableCrypto() requires php version >= 5.1.0');
|
|
}
|
|
}
|
|
|
|
}
|