initial commit; version 22.5.12042
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libs/Fabiang/Xmpp/Connection/Socket.php
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libs/Fabiang/Xmpp/Connection/Socket.php
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<?php
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/**
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* Copyright 2014 Fabian Grutschus. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are those
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* of the authors and should not be interpreted as representing official policies,
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* either expressed or implied, of the copyright holders.
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*
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* @author Fabian Grutschus <f.grutschus@lubyte.de>
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* @copyright 2014 Fabian Grutschus. All rights reserved.
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* @license BSD
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* @link http://github.com/fabiang/xmpp
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*/
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namespace Fabiang\Xmpp\Connection;
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use Psr\Log\LogLevel;
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use Fabiang\Xmpp\Stream\SocketClient;
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use Fabiang\Xmpp\Util\XML;
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use Fabiang\Xmpp\Options;
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use Fabiang\Xmpp\Exception\TimeoutException;
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/**
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* Connection to a socket stream.
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*
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* @package Xmpp\Connection
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*/
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class Socket extends AbstractConnection implements SocketConnectionInterface
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{
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const DEFAULT_LENGTH = 4096;
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const STREAM_START = <<<'XML'
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<?xml version="1.0" encoding="UTF-8"?>
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<stream:stream to="%s" xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" version="1.0">
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XML;
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const STREAM_END = '</stream:stream>';
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/**
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* Socket.
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*
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* @var SocketClient
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*/
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protected $socket;
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/**
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* Did we received any data yet?
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*
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* @var bool
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*/
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private $receivedAnyData = false;
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/**
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* Constructor set default socket instance if no socket was given.
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*
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* @param StreamSocket $socket Socket instance
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*/
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public function __construct(SocketClient $socket)
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{
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$this->setSocket($socket);
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}
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/**
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* Factory for connection class.
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*
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* @param Options $options Options object
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* @return static
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*/
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public static function factory(Options $options)
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{
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$socket = new SocketClient($options->getAddress());
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$object = new static($socket);
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$object->setOptions($options);
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return $object;
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}
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/**
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* {@inheritDoc}
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*/
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public function receive()
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{
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$buffer = $this->getSocket()->read(static::DEFAULT_LENGTH);
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if ($buffer) {
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$this->receivedAnyData = true;
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$address = $this->getAddress();
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$this->log("Received buffer '$buffer' from '{$address}'", LogLevel::DEBUG);
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$this->getInputStream()->parse($buffer);
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return $buffer;
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}
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try {
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$this->checkTimeout($buffer);
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} catch (TimeoutException $exception) {
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$this->reconnectTls($exception);
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}
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}
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/**
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* Try to reconnect via TLS.
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*
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* @param TimeoutException $exception
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* @return null
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* @throws TimeoutException
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*/
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private function reconnectTls(TimeoutException $exception)
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{
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// check if we didn't receive any data
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// if not we re-try to connect via TLS
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if (false === $this->receivedAnyData) {
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$matches = array();
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$previousAddress = $this->getOptions()->getAddress();
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// only reconnect via tls if we've used tcp before.
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if (preg_match('#tcp://(?<address>.+)#', $previousAddress, $matches)) {
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$this->log('Connecting via TCP failed, now trying to connect via TLS');
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$address = 'tls://' . $matches['address'];
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$this->connected = false;
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$this->getOptions()->setAddress($address);
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$this->getSocket()->reconnect($address);
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$this->connect();
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return;
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}
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}
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throw $exception;
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}
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/**
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* {@inheritDoc}
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*/
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public function send($buffer)
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{
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if (false === $this->isConnected()) {
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$this->connect();
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}
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$address = $this->getAddress();
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$this->log("Sending data '$buffer' to '{$address}'", LogLevel::DEBUG);
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$this->getSocket()->write($buffer);
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$this->getOutputStream()->parse($buffer);
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while ($this->checkBlockingListeners()) {
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$this->receive();
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}
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}
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/**
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* {@inheritDoc}
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*/
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public function connect()
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{
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if (false === $this->connected) {
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$address = $this->getAddress();
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$this->getSocket()->connect($this->getOptions()->getTimeout());
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$this->getSocket()->setBlocking(true);
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$this->connected = true;
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$this->log("Connected to '{$address}'", LogLevel::DEBUG);
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}
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$this->send(sprintf(static::STREAM_START, XML::quote($this->getOptions()->getTo())));
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}
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/**
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* {@inheritDoc}
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*/
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public function disconnect()
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{
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if (true === $this->connected) {
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$address = $this->getAddress();
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$this->send(static::STREAM_END);
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$this->getSocket()->close();
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$this->connected = false;
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$this->log("Disconnected from '{$address}'", LogLevel::DEBUG);
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}
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}
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/**
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* Get address from options object.
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*
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* @return string
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*/
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protected function getAddress()
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{
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return $this->getOptions()->getAddress();
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}
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/**
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* Return socket instance.
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*
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* @return SocketClient
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*/
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public function getSocket()
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{
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return $this->socket;
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}
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/**
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* {@inheritDoc}
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*/
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public function setSocket(SocketClient $socket)
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{
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$this->socket = $socket;
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return $this;
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}
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}
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