Openbuildings\Spiderling\Driver_Phantomjs_Connection

Complexity

Total Complexity

38

Size/Duplication

Total Lines	339
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Importance

Changes

0

19 Methods

Rating	Name	Duplication	Size	Complexity
A	port()	0	15	3
A	server()	0	9	2
A	host()	0	4	1
A	pid()	0	4	1
A	__construct()	0	7	2
B	start()	0	25	4
A	is_started()	0	4	1
A	is_running()	0	4	1
A	stop()	0	18	4
A	pid_file()	0	4	1
A	get()	0	4	1
A	post()	0	8	1
A	delete()	0	7	1
A	command_url()	0	4	1
A	set_phantomjs_binary()	0	6	2
B	call()	0	31	3
A	_start()	0	13	4
A	_kill()	0	4	1
A	_command()	0	19	4

<?php

namespace Openbuildings\Spiderling;

/**
 * Connect to phantomjs service, optionally start one if not present on a new port.
 * Send requests to phantomjs
 *
 * @package    Openbuildings\Spiderling
 * @author     Ivan Kerin
 * @copyright  (c) 2013 OpenBuildings Ltd.
 * @license    http://spdx.org/licenses/BSD-3-Clause
 */
class Driver_Phantomjs_Connection {

	/**
	 * The file storing the pid of the current phantomjs server process
	 * @var string
	 */
	protected $_pid_file;

	/**
	 * The pid of the current phantomjs server process
	 * @var string
	 */
	protected $_pid;

	/**
	 * Ulr of the phantomjs server
	 * @var string
	 */
	protected $_server = 'http://localhost';

	/**
	 * Port of the phantomjs server
	 * @var string
	 */
	protected $_port;

	/**
	 * Phantomjs binary
	 * @var string
	 */
	protected $_phantomjs_binary = 'phantomjs';

	/**
	 * Getter / Setter of the phantomjs server port.
	 * If none is set it tries to fine an unused port between 4445 and 5000
	 * @param  string $port
	 * @return string|Driver_Phantomjs_Connection
	 */
	public function port($port = NULL)
	{
		if ($port !== NULL)
		{
			$this->_port = $port;
			return $this;
		}

		if ( ! $this->_port)
		{
			$this->_port = Network::ephimeral_port($this->host(), 4445, 5000);

It seems like $this->host() targeting Openbuildings\Spiderling\Driver_Phantomjs_Connection::host() can also be of type false; however, Openbuildings\Spiderling\Network::ephimeral_port() does only seem to accept string, did you maybe forget to handle an error condition?

It seems like \Openbuildings\Spiderling\Network::ephimeral_port($this->host(), 4445, 5000) of type integer or boolean is incompatible with the declared type string of property $_port.

		}

		return $this->_port;
	}

	/**
	 * Getter / Setter of the current phantomjs server url
	 * @param  string $server
	 * @return string|Driver_Phantomjs_Connection
	 */
	public function server($server = NULL)
	{
		if ($server !== NULL)
		{
			$this->_server = $server;
			return $this;
		}
		return $this->_server;
	}

	/**
	 * Get the host of the current phantomjs server (without the protocol part)
	 * @return string
	 */
	public function host()
	{
		return parse_url($this->server(), PHP_URL_HOST);
	}

	/**
	 * Getter, get the current phantomjs server process pid
	 * @return string
	 */
	public function pid()
	{
		return $this->_pid;
	}

	public function __construct($server = NULL)
	{
		if ($server)
		{
			$this->server($server);
		}
	}

	/**
	 * Start a new phantomjs server, optionally provide pid_file and log file.
	 * If you provide a pid_file, it will kill the process currently running on that pid, before starting the new one
	 * If the start is unsuccessfull it will return FALSE
	 * @param  string $pid_file
	 * @param  string $log_file
	 * @return boolean
	 */
	public function start($pid_file = NULL, $log_file = '/dev/null')
	{
		if ($pid_file)

The expression $pid_file of type string|null is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== null instead.

		{
			$this->_pid_file = $pid_file;
			if (is_file($this->_pid_file))
			{
				$this->_kill(file_get_contents($pid_file));
				unlink($this->_pid_file);
			}
		}

		$this->_pid = $this->_start('phantom.js', $this->port(), 'phantomjs-connection.js', $log_file);

		if ($this->_pid_file)
		{
			file_put_contents($this->_pid_file, $this->_pid);
		}

		$self = $this;

		return Attempt::make(function() use ($self) {
			return $self->is_running();
		});
	}

	/**
	 * Check if the phantomjs server has been started
	 * @return boolean
	 */
	public function is_started()
	{
		return (bool) $this->_pid;
	}

	/**
	 * Check if the phantomjs server is actually running (the port is taken)
	 * @return boolean
	 */
	public function is_running()
	{
		return ! Network::is_port_open($this->host(), $this->port());

It seems like $this->host() targeting Openbuildings\Spiderling\Driver_Phantomjs_Connection::host() can also be of type false; however, Openbuildings\Spiderling\Network::is_port_open() does only seem to accept string, did you maybe forget to handle an error condition?

	}

	/**
	 * Gracefully stop the phantomjs server. Return FALSE on failure. Clear the pid_file if set
	 * @return boolean
	 */
	public function stop()
	{
		if ($this->is_started())
		{
			$this->delete('session');
			$this->_pid = NULL;
		}

		if ($this->_pid_file AND is_file($this->_pid_file))
		{
			unlink($this->_pid_file);
		}
		$self = $this;

		return Attempt::make(function() use ($self) {
			return ! $self->is_running();
		});
	}

	/**
	 * Getter - get the current pid_file
	 * @return string
	 */
	public function pid_file()
	{
		return $this->_pid_file;
	}

	/**
	 * Perform a get request on the phantomjs server
	 * @param  string $command
	 * @return mixed
	 */
	public function get($command)
	{
		return $this->call($command);
	}

	/**
	 * Perform a post request on the phantomjs server
	 * @param  string $command
	 * @param  array  $params
	 * @return mixed
	 */
	public function post($command, array $params)
	{
		$options = array();
		$options[CURLOPT_POST] = TRUE;
		$options[CURLOPT_POSTFIELDS] = http_build_query($params);

		return $this->call($command, $options);
	}

	/**
	 * Perform a delete request on the phantomjs server
	 * @param  string $command
	 * @return mixed
	 */
	public function delete($command)
	{
		$options = array();
		$options[CURLOPT_CUSTOMREQUEST] = 'DELETE';

		return $this->call($command, $options);
	}

	/**
	 * Get the full url of a command (including server and port)
	 * @param  string $command
	 * @return string
	 */
	public function command_url($command)
	{
		return rtrim($this->server(), '/').':'.$this->port().'/'.$command;
	}

	/**
	 * Set phantomjs binary location
	 * @param string $binary
	 * @throws Exception
	 */
	public function set_phantomjs_binary($binary) {
			if ( ! is_file($binary)){
				throw new Exception('Cannot set phantomjs binary: file :binary is not found', array(':binary' => $binary));
			}
		$this->_phantomjs_binary = $binary;
	}

	/**
	 * Perform a custom request on the phantomjs server, using curl
	 * @param  string $command
	 * @param  array  $options
	 * @return mixed
	 */
	protected function call($command, array $options = array())
	{
		$curl = curl_init();
		$options[CURLOPT_URL] = $this->command_url($command);
		$options[CURLOPT_RETURNTRANSFER] = TRUE;
		$options[CURLOPT_FOLLOWLOCATION] = TRUE;

		curl_setopt_array($curl, $options);

		$raw = '';

		Attempt::make(function() use ($curl, & $raw) {
			$raw = trim(curl_exec($curl));
			return curl_getinfo($curl, CURLINFO_HTTP_CODE) == 200;
		});

		$error = curl_error($curl);
		$code = curl_getinfo($curl, CURLINFO_HTTP_CODE);

		curl_close($curl);

		if ($error)
			throw new Exception_Driver('Curl ":command" throws exception :error', array(':command' => $command, ':error' => $error));

		if ($code != 200)
			throw new Exception_Driver('Unexpected response from the panthomjs for :command: :code', array(':command' => $command, ':code' => $code));

		$result = json_decode($raw, TRUE);

		return $result;
	}

	/**
	 * Start a phantomjs server in the background. Set port, server js file, additional files and log file.
	 *
	 * @param  string  $file       the server js file
	 * @param  integer $port       the port to start the server on
	 * @param  string  $additional additional file, passed to the js server
	 * @param  string  $log_file
	 * @return string the pid of the newly started process
	 * @throws Exception
	 */
	protected function _start($file, $port, $additional = NULL, $log_file = '/dev/null')
	{
		if ( ! Network::is_port_open('localhost', $port))
			throw new Exception('Port :port is already taken', array(':port' => $port));

		if ($log_file !== '/dev/null' AND ! is_file($log_file))
			throw new Exception('Log file (:log_file) must be a file or /dev/null', array(':log_file' => $log_file));

		return shell_exec(strtr('nohup :command > :log 2> :log & echo $!', array(
			':command' => $this->_command($file, $port, $additional),
			':log' => $log_file,
		)));
	}

	/**
	 * kill a server on a given pid
	 * @param  string $pid
	 */
	protected function _kill($pid)
	{
		shell_exec('kill '.$pid);
	}

	/**
	 * Return the command to start the phantomjs server
	 *
	 * @param  string  $file       the server js file
	 * @param  integer $port
	 * @param  string  $additional additional js file
	 * @return string
	 * @throws Exception
	 */
	protected function _command($file, $port, $additional = NULL)
	{
		$dir = realpath(__DIR__.'/../../../assets').'/';

		$file = $dir.$file;

		if ( ! is_file($file))
			throw new Exception('Cannot start phantomjs: file :file is not found', array(':file' => $file));

		if ($additional)

The expression $additional of type string|null is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== null instead.

		{
			if ( ! is_file($file))
				throw new Exception('Cannot start phantomjs: file :additional is not found', array(':additional' => $additional));

			$additional = $dir.$additional;
		}

		return $this->_phantomjs_binary." --ssl-protocol=any --ignore-ssl-errors=true {$file} {$port} {$additional}";
	}
}