PHPDaemon\Network\IOStream

Complexity

Total Complexity

150

Size/Duplication

Total Lines	953
Duplicated Lines	9.02 %

Coupling/Cohesion

Components	1
Dependencies	6

Importance

Changes	13
Bugs	3	Features	0

47 Methods

Rating	Name	Duplication	Size	Complexity
A	setTimeout()	0	4	1
A	setTimeouts()	0	8	2
A	setPriority()	0	5	1
A	setWatermark()	0	13	4
A	init()	0	3	1
A	readLine()	0	7	3
A	drain()	0	4	1
D	drainIfMatch()	0	25	9
A	prependInput()	0	7	2
A	prependOutput()	0	7	2
A	substr()	0	7	2
A	search()	0	4	1
A	readExact()	10	10	4
A	getInputLength()	0	4	1
A	gracefulShutdown()	0	5	1
A	freezeInput()	0	7	2
A	unfreezeInput()	0	7	2
A	freezeOutput()	0	7	2
A	unfreezeOutput()	0	7	2
A	onWrite()	0	3	1
B	write()	19	20	6
B	writeln()	16	17	5
A	finish()	0	12	3
A	onFinish()	0	3	1
A	close()	0	14	4
A	unsetFd()	0	5	1
A	log()	0	4	1
A	lookExact()	0	10	3
A	look()	10	10	3
A	onRead()	0	3	1
A	onReady()	0	3	1
A	onWriteOnce()	0	8	2
C	__construct()	0	32	8
B	__get()	0	11	5
A	isFreed()	0	4	1
A	isFinished()	0	4	1
A	getBev()	0	4	1
A	getFd()	0	4	1
A	setContext()	0	5	1
D	setFd()	16	77	20
A	onReadEv()	0	15	4
D	onWriteEv()	0	40	10
C	onStateEv()	0	31	12
A	moveToBuffer()	7	7	2
A	writeFromBuffer()	8	8	2
A	read()	0	14	4
A	readUnlimited()	0	11	3

<?php
namespace PHPDaemon\Network;

use PHPDaemon\Core\Daemon;
use PHPDaemon\Structures\StackCallbacks;
use PHPDaemon\Traits\EventLoopContainer;

/**
 * IOStream
 * @package PHPDaemon\Network
 * @author  Vasily Zorin <maintainer@daemon.io>
 */
abstract class IOStream
{
    use \PHPDaemon\Traits\ClassWatchdog;
    use \PHPDaemon\Traits\StaticObjectWatchdog;
    use \PHPDaemon\Traits\EventHandlers;
    use EventLoopContainer;

    /**
     * @var object Associated pool
     */
    public $pool;

    /**
     * @var string EOL
     */
    protected $EOL = "\n";

    /**
     * @var integer EOLS_* switch
     */
    protected $EOLS;

    /**
     * @var object EventBufferEvent
     */
    protected $bev;

    /**
     * @var resource File descriptor
     */
    protected $fd;

    /**
     * @var boolean Finished?
     */
    protected $finished = false;

    /**
     * @var boolean Ready?
     */
    protected $ready = false;

    /**
     * @var boolean Writing?
     */
    protected $writing = true;

    /**
     * @var boolean Timeout?
     */
    protected $timedout = false;

    /**
     * @var integer Default low mark. Minimum number of bytes in buffer
     */
    protected $lowMark = 1;

    /**
     * @var integer Default high mark. Maximum number of bytes in buffer
     */
    protected $highMark = 0xFFFF; // initial value of the maximum amout of bytes in buffer

    /**
     * @var integer Priority
     */
    protected $priority;

    /**
     * @var boolean Initialized?
     */
    protected $inited = false;

    /**
     * @var integer Current state
     */
    protected $state = 0; // stream state of the connection (application protocol level)

    /**
     * Alias of STATE_STANDBY
     */
    const STATE_ROOT = 0;

    /**
     * Standby state (default state)
     */
    const STATE_STANDBY = 0;

    /**
     * @var object Stack of callbacks called when writing is done
     */
    protected $onWriteOnce;

    /**
     * @var integer Timeout
     */
    protected $timeout = null;

    /**
     * @var string URL
     */
    protected $url;

    /**
     * @var boolean Alive?
     */
    protected $alive = false;

    /**
     * @var boolean Is bevConnect used?
     */
    protected $bevConnect = false;

    /**
     * @var boolean Should we can onReadEv() in next onWriteEv()?
     */
    protected $wRead = false;

    /**
     * @var boolean Freed?
     */
    protected $freed = false;

    /**
     * @var object Context
     */
    protected $ctx;

    /**
     * @var object Context name
     */
    protected $ctxname;

    /**
     * @var integer Defines context-related flag
     */
    protected $ctxMode;

    /**
     * @var boolean SSL?
     */
    protected $ssl = false;

    /**
     * @var float Read timeout
     */
    protected $timeoutRead;

    /**
     * @var float Write timeout
     */
    protected $timeoutWrite;

    /**
     * IOStream constructor
     * @param resource $fd File descriptor. Optional

Should the type for parameter $fd not be resource|null?

     * @param object $pool Pool. Optional

Should the type for parameter $pool not be object|null?

     */
    public function __construct($fd = null, $pool = null)
    {
        if ($pool) {
            $this->pool = $pool;
            $this->eventLoop = $pool->eventLoop;
            var_dump(['iostream pool' => md5(spl_object_hash($pool)), 'eventLoop' => $this->eventLoop]);

var_dump(array('iostream pool' => md5(spl_object_hash($pool)), 'eventLoop' => $this->eventLoop)); looks like debug code. Are you sure you do not want to remove it? This might expose sensitive data.

            $this->pool->attach($this);
            if (isset($this->pool->config->timeout->value)) {
                $this->timeout = $this->pool->config->timeout->value;
            }
            if (isset($this->pool->config->timeoutread->value)) {
                $this->timeoutRead = $this->pool->config->timeoutread->value;
            }
            if (isset($this->pool->config->timeoutwrite->value)) {
                $this->timeoutWrite = $this->pool->config->timeoutwrite->value;
            }
        }

        if ($fd !== null) {
            $this->setFd($fd);
        }

        if ($this->EOL === "\n") {
            $this->EOLS = \EventBuffer::EOL_LF;
        } elseif ($this->EOL === "\r\n") {
            $this->EOLS = \EventBuffer::EOL_CRLF;
        } else {
            $this->EOLS = \EventBuffer::EOL_ANY;
        }

        $this->onWriteOnce = new StackCallbacks;
    }

    /**
     * Getter
     * @param  string $name Name
     * @return mixed
     */
    public function __get($name)
    {
        if ($name === 'finished'
            || $name === 'alive'
            || $name === 'freed'
            || $name === 'url'
        ) {
            return $this->{$name};
        }
        return null;
    }


    /**
     * Freed?
     * @return boolean
     */
    public function isFreed()
    {
        return $this->freed;
    }

    /**
     * Finished?
     * @return boolean
     */
    public function isFinished()
    {
        return $this->finished;
    }

    /**
     * Get EventBufferEvent
     * @return EventBufferEvent
     */
    public function getBev()
    {
        return $this->bev;
    }

    /**
     * Get file descriptor
     * @return resource File descriptor
     */
    public function getFd()
    {
        return $this->fd;
    }

    /**
     * Sets context mode
     * @param  object $ctx Context
     * @param  integer $mode Mode
     * @return void
     */

    public function setContext($ctx, $mode)
    {
        $this->ctx = $ctx;
        $this->ctxMode = $mode;
    }

    /**
     * Sets fd
     * @param  resource $fd File descriptor
     * @param  object $bev EventBufferEvent

Should the type for parameter $bev not be object|null?

     * @return void
     */
    public function setFd($fd, $bev = null)
    {
        $this->fd = $fd;
        if ($this->fd === false) {
            $this->finish();
            return;
        }
        if ($bev !== null) {
            $this->bev = $bev;
            $this->bev->setCallbacks([$this, 'onReadEv'], [$this, 'onWriteEv'], [$this, 'onStateEv']);
            if (!$this->bev) {
                return;
            }
            $this->ready = true;
            $this->alive = true;
        } else {
            $flags = !is_resource($this->fd) ? \EventBufferEvent::OPT_CLOSE_ON_FREE : 0;
            $flags |= \EventBufferEvent::OPT_DEFER_CALLBACKS; /* buggy option */
            if ($this->ctx) {
                if ($this->ctx instanceof \EventSslContext) {

The class EventSslContext does not exist. Did you forget a USE statement, or did you not list all dependencies?

                    $this->bev = $this->eventLoop->bufferEventSsl(
                        $this->fd,
                        $this->ctx,
                        $this->ctxMode,
                        $flags
                    );

                    if ($this->bev) {

This code seems to be duplicated across your project.

                        $this->bev->setCallbacks([$this, 'onReadEv'], [$this, 'onWriteEv'], [$this, 'onStateEv']);
                    }
                    $this->ssl = true;
                } else {
                    $this->log('unsupported type of context: ' . ($this->ctx ? get_class($this->ctx) : 'undefined'));
                    return;
                }
            } else {

This code seems to be duplicated across your project.

                $this->bev = $this->eventLoop->bufferEvent(
                    $this->fd,
                    $flags,
                    [$this, 'onReadEv'],
                    [$this, 'onWriteEv'],
                    [$this, 'onStateEv']
                );
            }
            if (!$this->bev) {
                return;
            }
        }
        if ($this->priority !== null) {
            $this->bev->priority = $this->priority;
        }
        $this->setTimeouts(
            $this->timeoutRead !== null ? $this->timeoutRead : $this->timeout,
            $this->timeoutWrite !== null ? $this->timeoutWrite : $this->timeout
        );
        if ($this->bevConnect && ($this->fd === null)) {
            //$this->bev->connectHost(Daemon::$process->dnsBase, $this->hostReal, $this->port);

66% of this comment could be valid code. Did you maybe forget this after debugging?

            $this->bev->connect($this->addr);

The property addr does not exist on object<PHPDaemon\Network\IOStream>. Since you implemented __get, maybe consider adding a @property annotation.

        }
        if (!$this->bev) {
            $this->finish();
            return;
        }
        if (!$this->bev->enable(\Event::READ | \Event::WRITE | \Event::TIMEOUT | \Event::PERSIST)) {

This code seems to be duplicated across your project.

            $this->finish();
            return;
        }
        $this->bev->setWatermark(\Event::READ, $this->lowMark, $this->highMark);
        init:
        if ($this->keepalive && $this->fd != null) {

The property keepalive does not exist on object<PHPDaemon\Network\IOStream>. Since you implemented __get, maybe consider adding a @property annotation.

            $this->setKeepalive(true);

The method setKeepalive does not exist on object<PHPDaemon\Network\IOStream>? Since you implemented __call, maybe consider adding a @method annotation.

        }
        if (!$this->inited) {
            $this->inited = true;
            $this->init();
        }
    }

    /**
     * Set timeout
     * @param  integer $rw Timeout
     * @return void
     */
    public function setTimeout($rw)
    {
        $this->setTimeouts($rw, $rw);
    }

    /**
     * Set timeouts
     * @param  integer $read Read timeout in seconds
     * @param  integer $write Write timeout in seconds
     * @return void
     */
    public function setTimeouts($read, $write)
    {
        $this->timeoutRead = $read;

The property $timeoutRead was declared of type double, but $read is of type integer. Maybe add a type cast?

        $this->timeoutWrite = $write;

The property $timeoutWrite was declared of type double, but $write is of type integer. Maybe add a type cast?

        if ($this->bev) {
            $this->bev->setTimeouts($this->timeoutRead, $this->timeoutWrite);
        }
    }

    /**
     * Sets priority
     * @param  integer $p Priority
     * @return void
     */
    public function setPriority($p)
    {
        $this->priority = $p;
        $this->bev->priority = $p;
    }

    /**
     * Sets watermark
     * @param  integer|null $low Low
     * @param  integer|null $high High
     * @return void
     */
    public function setWatermark($low = null, $high = null)
    {
        if ($low !== null) {
            $this->lowMark = $low;
        }
        if ($high !== null) {
            $this->highMark = $high;
        }
        if ($this->highMark > 0) {
            $this->highMark = max($this->lowMark, $this->highMark);
        }
        $this->bev->setWatermark(\Event::READ, $this->lowMark, $this->highMark);
    }

    /**
     * Constructor
     * @return void
     */
    protected function init()
    {
    }

    /**
     * Reads line from buffer
     * @param  integer $eol EOLS_*

Should the type for parameter $eol not be integer|null?

     * @return string|null
     */
    public function readLine($eol = null)
    {
        if (!isset($this->bev)) {
            return null;
        }
        return $this->bev->input->readLine($eol ?: $this->EOLS);
    }

    /**
     * Drains buffer
     * @param  integer $n Numbers of bytes to drain
     * @return boolean    Success
     */
    public function drain($n)
    {
        return $this->bev->input->drain($n);
    }

    /**
     * Drains buffer it matches the string
     * @param  string $str Data
     * @return boolean|null      Success
     */
    public function drainIfMatch($str)
    {
        if (!isset($this->bev)) {
            return false;
        }
        $in = $this->bev->input;
        $l = mb_orig_strlen($str);
        $ll = $in->length;
        if ($ll === 0) {
            return $l === 0 ? true : null;
        }
        if ($ll < $l) {
            return $in->search(substr($str, 0, $ll)) === 0 ? null : false;
        }
        if ($ll === $l) {
            if ($in->search($str) === 0) {
                $in->drain($l);
                return true;
            }
        } elseif ($in->search($str, 0, $l) === 0) {
            $in->drain($l);
            return true;
        }
        return false;
    }

    /**
     * Reads exact $n bytes of buffer without draining
     * @param  integer $n Number of bytes to read
     * @param  integer $o Offset
     * @return string|false
     */
    public function lookExact($n, $o = 0)
    {
        if (!isset($this->bev)) {
            return false;
        }
        if ($o + $n > $this->bev->input->length) {
            return false;
        }
        return $this->bev->input->substr($o, $n);
    }

    /**
     * Prepends data to input buffer
     * @param  string $str Data
     * @return boolean      Success
     */
    public function prependInput($str)
    {
        if (!isset($this->bev)) {
            return false;
        }
        return $this->bev->input->prepend($str);
    }

    /**
     * Prepends data to output buffer
     * @param  string $str Data
     * @return boolean      Success
     */
    public function prependOutput($str)
    {
        if (!isset($this->bev)) {
            return false;
        }
        return $this->bev->output->prepend($str);
    }

    /**
     * Read from buffer without draining
     * @param integer $n Number of bytes to read
     * @param integer $o Offset
     * @return string|false
     */
    public function look($n, $o = 0)

This method seems to be duplicated in your project.

    {
        if (!isset($this->bev)) {
            return false;
        }
        if ($this->bev->input->length <= $o) {
            return '';
        }
        return $this->bev->input->substr($o, $n);
    }

    /**
     * Read from buffer without draining
     * @param  integer $o Offset
     * @param  integer $n Number of bytes to read
     * @return string|false
     */
    public function substr($o, $n = -1)
    {
        if (!isset($this->bev)) {
            return false;
        }
        return $this->bev->input->substr($o, $n);
    }

    /**
     * Searches first occurence of the string in input buffer
     * @param  string $what Needle
     * @param  integer $start Offset start
     * @param  integer $end Offset end
     * @return integer        Position
     */
    public function search($what, $start = 0, $end = -1)
    {
        return $this->bev->input->search($what, $start, $end);
    }

    /**
     * Reads exact $n bytes from buffer
     * @param  integer $n Number of bytes to read
     * @return string|false
     */
    public function readExact($n)

This method seems to be duplicated in your project.

    {
        if ($n === 0) {
            return '';
        }
        if (!$this->bev || $this->bev->input->length < $n) {
            return false;
        }
        return $this->read($n);
    }

    /**
     * Returns length of input buffer
     * @return integer
     */
    public function getInputLength()
    {
        return $this->bev->input->length;
    }

    /**
     * Called when the worker is going to shutdown
     * @return boolean Ready to shutdown?
     */
    public function gracefulShutdown()
    {
        $this->finish();
        return true;
    }

    /**
     * Freeze input
     * @param  boolean $at_front At front. Default is true. If the front of a buffer is frozen, operations that drain data from the front of the buffer, or that prepend data to the buffer, will fail until it is unfrozen. If the back a buffer is frozen, operations that append data from the buffer will fail until it is unfrozen

This line exceeds maximum limit of 120 characters; contains 327 characters

     * @return boolean           Success
     */
    public function freezeInput($at_front = true)
    {
        if (isset($this->bev)) {
            return $this->bev->input->freeze($at_front);
        }
        return false;
    }

    /**
     * Unfreeze input
     * @param  boolean $at_front At front. Default is true. If the front of a buffer is frozen, operations that drain data from the front of the buffer, or that prepend data to the buffer, will fail until it is unfrozen. If the back a buffer is frozen, operations that append data from the buffer will fail until it is unfrozen

This line exceeds maximum limit of 120 characters; contains 327 characters

     * @return boolean           Success
     */
    public function unfreezeInput($at_front = true)
    {
        if (isset($this->bev)) {
            return $this->bev->input->unfreeze($at_front);
        }
        return false;
    }

    /**
     * Freeze output
     * @param  boolean $at_front At front. Default is true. If the front of a buffer is frozen, operations that drain data from the front of the buffer, or that prepend data to the buffer, will fail until it is unfrozen. If the back a buffer is frozen, operations that append data from the buffer will fail until it is unfrozen

This line exceeds maximum limit of 120 characters; contains 327 characters

     * @return boolean           Success
     */
    public function freezeOutput($at_front = true)
    {
        if (isset($this->bev)) {
            return $this->bev->output->unfreeze($at_front);
        }
        return false;
    }

    /**
     * Unfreeze output
     * @param  boolean $at_front At front. Default is true. If the front of a buffer is frozen, operations that drain data from the front of the buffer, or that prepend data to the buffer, will fail until it is unfrozen. If the back a buffer is frozen, operations that append data from the buffer will fail until it is unfrozen

This line exceeds maximum limit of 120 characters; contains 327 characters

     * @return boolean           Success
     */
    public function unfreezeOutput($at_front = true)
    {
        if (isset($this->bev)) {
            return $this->bev->output->unfreeze($at_front);
        }
        return false;
    }

    /**
     * Called when the connection is ready to accept new data
     * @return void
     */
    public function onWrite()
    {
    }

    /**
     * Send data to the connection. Note that it just writes to buffer that flushes at every baseloop
     * @param  string $data Data to send
     * @return boolean       Success
     */
    public function write($data)

This method seems to be duplicated in your project.

    {
        if (!$this->alive) {
            Daemon::log('Attempt to write to dead IOStream (' . get_class($this) . ')');
            return false;
        }
        if (!isset($this->bev)) {
            return false;
        }
        if (!mb_orig_strlen($data)) {
            return true;
        }
        $this->writing = true;
        Daemon::$noError = true;
        if (!$this->bev->write($data) || !Daemon::$noError) {
            $this->close();
            return false;
        }
        return true;
    }

    /**
     * Send data and appending \n to connection. Note that it just writes to buffer flushed at every baseloop
     * @param  string $data Data to send
     * @return boolean       Success
     */
    public function writeln($data)

This method seems to be duplicated in your project.

    {
        if (!$this->alive) {
            Daemon::log('Attempt to write to dead IOStream (' . get_class($this) . ')');
            return false;
        }
        if (!isset($this->bev)) {
            return false;
        }
        if (!mb_orig_strlen($data) && !mb_orig_strlen($this->EOL)) {
            return true;
        }
        $this->writing = true;
        $this->bev->write($data);
        $this->bev->write($this->EOL);
        return true;
    }

    /**
     * Finish the session. You should not worry about buffers, they are going to be flushed properly
     * @return void
     */
    public function finish()
    {
        if ($this->finished) {
            return;
        }
        $this->finished = true;
        $this->eventLoop->interrupt();
        $this->onFinish();
        if (!$this->writing) {
            $this->close();
        }
    }

    /**
     * Called when the session finished
     * @return void
     */
    protected function onFinish()
    {
    }

    /**
     * Close the connection
     * @return void
     */
    public function close()
    {
        if (!$this->freed) {
            $this->freed = true;
            if (isset($this->bev)) {
                $this->bev->free();
            }
            $this->bev = null;
            //$this->eventLoop->interrupt();

75% of this comment could be valid code. Did you maybe forget this after debugging?

        }
        if ($this->pool) {
            $this->pool->detach($this);
        }
    }

    /**
     * Unsets pointers of associated EventBufferEvent and File descriptr
     * @return void
     */
    public function unsetFd()
    {
        $this->bev = null;
        $this->fd = null;
    }

    /**
     * Send message to log
     * @param  string $m Message
     * @return void
     */
    protected function log($m)
    {
        Daemon::log(get_class($this) . ': ' . $m);
    }

    /**
     * Called when the connection has got new data
     * @param  object $bev EventBufferEvent
     * @return void
     */
    public function onReadEv($bev)

The parameter $bev is not used and could be removed.

    {
        if (!$this->ready) {
            $this->wRead = true;
            return;
        }
        if ($this->finished) {
            return;
        }
        try {
            $this->onRead();
        } catch (\Exception $e) {
            Daemon::uncaughtExceptionHandler($e);
        }
    }

    /**
     * Called when new data received
     * @return void
     */
    protected function onRead()
    {
    }

    /**
     * Called when the stream is handshaked (at low-level), and peer is ready to recv. data
     * @return void
     */
    protected function onReady()
    {
    }

    /**
     * Push callback which will be called only once, when writing is available next time
     * @param  callable $cb Callback
     * @return void
     */
    public function onWriteOnce($cb)
    {
        if (!$this->writing) {
            $cb($this);
            return;
        }
        $this->onWriteOnce->push($cb);
    }

    /**
     * Called when the connection is ready to accept new data
     * @param  object $bev EventBufferEvent
     * @return void
     */
    public function onWriteEv($bev)

The parameter $bev is not used and could be removed.

    {
        $this->writing = false;
        if ($this->finished) {
            if ($this->bev->output->length === 0) {
                $this->close();
            }
            return;
        }
        if (!$this->ready) {
            $this->ready = true;
            while (!$this->onWriteOnce->isEmpty()) {
                try {
                    $this->onWriteOnce->executeOne($this);
                } catch (\Exception $e) {
                    Daemon::uncaughtExceptionHandler($e);
                }
                if (!$this->ready) {
                    return;
                }
            }
            $this->alive = true;
            try {
                $this->onReady();
                if ($this->wRead) {
                    $this->wRead = false;
                    $this->onRead();
                }
            } catch (\Exception $e) {
                Daemon::uncaughtExceptionHandler($e);
            }
        } else {
            $this->onWriteOnce->executeAll($this);
        }
        try {
            $this->onWrite();
        } catch (\Exception $e) {
            Daemon::uncaughtExceptionHandler($e);
        }
    }

    /**
     * Called when the connection state changed
     * @param  object $bev EventBufferEvent
     * @param  integer $events Events
     * @return void
     */
    public function onStateEv($bev, $events)
    {
        if ($events & \EventBufferEvent::CONNECTED) {
            $this->onWriteEv($bev);
        } elseif ($events & \EventBufferEvent::TIMEOUT) {
            $this->timedout = true;
            $this->finish();
        } elseif ($events & (\EventBufferEvent::ERROR | \EventBufferEvent::EOF)) {
            try {
                if ($this->finished) {
                    return;
                }
                if ($events & \EventBufferEvent::ERROR) {
                    $errno = \EventUtil::getLastSocketErrno();
                    if ($errno !== 0 && $errno !== 104) {
                        $this->log('Socket error #' . $errno . ':' . \EventUtil::getLastSocketError());
                    }
                    if ($this->ssl && $this->bev) {
                        while ($err = $this->bev->sslError()) {
                            $this->log('EventBufferEvent SSL error: ' . $err);
                        }
                    }
                }
                $this->finished = true;
                $this->onFinish();
                $this->close();
            } catch (\Exception $e) {
                Daemon::uncaughtExceptionHandler($e);
            }
        }
    }

    /**
     * Moves arbitrary number of bytes from input buffer to given buffer
     * @param  \EventBuffer $dest Destination nuffer
     * @param  integer $n Max. number of bytes to move
     * @return integer|false
     */
    public function moveToBuffer(\EventBuffer $dest, $n)

This method seems to be duplicated in your project.

    {
        if (!isset($this->bev)) {
            return false;
        }
        return $dest->appendFrom($this->bev->input, $n);
    }

    /**
     * Moves arbitrary number of bytes from given buffer to output buffer
     * @param  \EventBuffer $src Source buffer
     * @param  integer $n Max. number of bytes to move
     * @return integer|false
     */
    public function writeFromBuffer(\EventBuffer $src, $n)

This method seems to be duplicated in your project.

    {
        if (!isset($this->bev)) {
            return false;
        }
        $this->writing = true;
        return $this->bev->output->appendFrom($src, $n);
    }

    /**
     * Read data from the connection's buffer
     * @param  integer $n Max. number of bytes to read
     * @return string|false    Readed data
     */
    public function read($n)
    {
        if ($n <= 0) {
            return '';
        }
        if (!isset($this->bev)) {
            return false;
        }
        $read = $this->bev->read($n);
        if ($read === null) {
            return false;
        }
        return $read;
    }

    /**
     * Reads all data from the connection's buffer
     * @return string Readed data
     */
    public function readUnlimited()
    {
        if (!isset($this->bev)) {
            return false;
        }
        $read = $this->bev->read($this->bev->input->length);
        if ($read === null) {
            return false;
        }
        return $read;
    }
}