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php
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pear
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Net
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Socket.php
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PHP Script
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2001-01-10
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10KB
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326 lines
<?php
//
// +----------------------------------------------------------------------+
// | PHP version 4.0 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2001 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Stig Bakken <ssb@fast.no> |
// | Chuck Hagenbuch <chuck@horde.org> |
// +----------------------------------------------------------------------+
//
// $Id: Socket.php,v 1.5 2001/01/10 01:01:56 ssb Exp $
//
require_once 'PEAR.php';
/**
* Generalized Socket class. More docs to be written.
*
* @version 0.2
* @author Stig Bakken <ssb@fast.no>
* @author Chuck Hagenbuch <chuck@horde.org>
*/
class Net_Socket extends PEAR {
// {{{ properties
/** Socket file pointer. */
var $fp = null;
/** Whether the socket is blocking. */
var $blocking = true;
/** Whether the socket is persistant. */
var $persistent;
/** The IP address to connect to. */
var $addr = '';
/** The port number to connect to. */
var $port = 0;
/** Number of seconds to wait on socket connections before
assuming there's no more data. */
var $timeout = false;
/** Number of bytes to read at a time in readLine() and
readAll(). */
var $lineLength = 2048;
// }}}
// {{{ constructor
/**
* Constructs a new Net_Socket object.
*
* @access public
*/
function Net_Socket() {
$this->PEAR();
}
// }}}
// {{{ connect()
/**
* Connect to the specified port. If called when the socket is
* already connected, it disconnects and connects again.
*
* @param $addr string IP address or host name
* @param $port int TCP port number
* @param $persistent bool (optional) whether the connection is
* persistent (kept open between requests by the web server)
* @param $timeout int (optional) how long to wait for data
* @access public
* @return mixed true on success or error object
*/
function connect($addr, $port, $persistent = false, $timeout = false) {
if (is_resource($this->fp)) {
@fclose($this->fp);
$this->fp = null;
}
if (strspn($addr, '.0123456789') == strlen($addr)) {
$this->addr = $addr;
} else {
$this->addr = gethostbyname($addr);
}
$this->port = $port % 65536;
$this->timeout = $timeout;
$openfunc = $persistent ? 'pfsockopen' : 'fsockopen';
$errno = 0;
$errstr = '';
if ($this->timeout) {
$fp = $openfunc($this->addr, $this->port, $errno, $errstr, $this->timeout);
} else {
$fp = $openfunc($this->addr, $this->port, $errno, $errstr);
}
if (!$fp) {
return new PEAR_Error($errstr, $errno);
}
socket_set_blocking($fp, $this->blocking);
$this->fp = $fp;
$this->persistent = $persistent;
return true;
}
// }}}
// {{{ disconnect()
/**
* Disconnects from the peer, closes the socket.
*
* @access public
* @return mixed true on success or an error object otherwise
*/
function disconnect() {
if (is_resource($this->fp)) {
fclose($this->fp);
$this->fp = null;
return true;
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ isBlocking()
/**
* Find out if the socket is in blocking mode.
*
* @access public
* @return bool the current blocking mode.
*/
function isBlocking() {
return $this->blocking;
}
// }}}
// {{{ setBlocking()
/**
* Sets whether the socket connection should be blocking or
* not. A read call to a non-blocking socket will return immediately
* if there is no data available, whereas it will block until there
* is data for blocking sockets.
*
* @param $mode bool true for blocking sockets, false for nonblocking
* @access public
*/
function setBlocking($mode) {
$this->blocking = $mode;
if (is_resource($this->fp)) {
set_socket_blocking($this->fp, $mode);
}
}
// }}}
// {{{ gets()
function gets($size) {
if (is_resource($this->fp)) {
return fgets($this->fp, $size);
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ read()
/**
* Read a specified amount of data. This is guaranteed to return,
* and has the added benefit of getting everything in one fread()
* chunk; if you know the size of the data you're getting
* beforehand, this is definitely the way to go.
*
* @param $size The number of bytes to read from the socket.
* @access public
* @return $size bytes of data from the socket, or a PEAR_Error if
* not connected.
*/
function read($size) {
if (is_resource($this->fp)) {
return fread($this->fp, $size);
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ write()
function write($data) {
if (is_resource($this->fp)) {
return fwrite($this->fp, $data);
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ writeLine()
/**
* Write a line of data to the socket, followed by a trailing "\r\n".
*
* @access public
* @return mixed fputs result, or an error
*/
function writeLine ($data) {
if (is_resource($this->fp)) {
return fwrite($this->fp, "$data\r\n");
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ eof()
function eof() {
return (is_resource($this->fp) && feof($this->fp));
}
// }}}
// {{{ readByte()
function readByte() {
if (is_resource($this->fp)) {
return ord(fread($this->fp, 1));
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ readWord()
function readWord() {
if (is_resource($this->fp)) {
$buf = fread($this->fp, 2);
return (ord($buf[0]) + (ord($buf[1]) << 8));
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ readInt()
function readInt() {
if (is_resource($this->fp)) {
$buf = fread($this->fp, 4);
return (ord($buf[0]) + (ord($buf[1]) << 8) +
(ord($buf[2]) << 16) + (ord($buf[3]) << 24));
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ readString()
function readString() {
if (is_resource($this->fp)) {
$string = '';
while (($char = fread($this->fp, 1)) != "\x00") {
$string .= $char;
}
return $string;
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ readIPAddress()
function readIPAddress() {
if (is_resource($this->fp)) {
$buf = fread($this->fp, 4);
return sprintf("%s.%s.%s.%s", ord($buf[0]), ord($buf[1]),
ord($buf[2]), ord($buf[3]));
}
return new PEAR_Error("not connected");
}
// }}}
// {{{ readLine()
/**
* Read until either the end of the socket or a newline, whichever
* comes first. Strips the trailing newline from the returned data.
*
* @access public
* @return All available data up to a newline, without that
* newline, or until the end of the socket.
*/
function readLine() {
if (is_resource($this->fp)) {
$line = '';
$timeout = time() + $this->timeout;
while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
$line .= fgets($this->fp, $this->lineLength);
$len = strlen($line);
if ($len >=2 && substr($line, $len-2, 2) == "\r\n")
return substr($line, 0, $len-2);
}
return $line;
}
return new PEAR_ERROR("not connected");
}
// }}}
// {{{ readAll()
/**
* Read until the socket closes. THIS FUNCTION WILL NOT EXIT if the
* socket is in blocking mode until the socket closes.
*
* @access public
* @return All data until the socket closes.
*/
function readAll() {
if (is_resource($this->fp)) {
$data = '';
while (!feof($this->fp))
$data .= fread($this->fp, $this->lineLength);
return $data;
}
return new PEAR_Error("not connected");
}
// }}}
}
?>