Nexcessnet_Turpentine_Model_Varnish_Admin_Socket::start() - Code Metrics - Inspection of "Allows Custom VCL template" - nexcess/magento-turpentine - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — devel (#1212)

by Aric

created 2016-06-22 18:50 UTC

start() A

↳ Parent: Nexcessnet_Turpentine_Model_Varnish_Admin_Socket

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	4
rs	10
c	0
b	0
f	0
cc	1
eloc	3
nc	1
nop	0

<?php

/**
 * Nexcess.net Turpentine Extension for Magento
 * Copyright (C) 2012  Nexcess.net L.L.C.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/**
 * Based heavily on Tim Whitlock's VarnishAdminSocket.php from php-varnish
 * @link https://github.com/timwhitlock/php-varnish
 *
 * Copyright (c) 2010 Tim Whitlock
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * @method array help()
 * @method array ping()
 * @method array auth()
 * @method array banner()
 * @method array vcl_load()
 * @method array vcl_inline()
 * @method array vcl_use()
 * @method array vcl_discard()
 * @method array vcl_list()
 * @method array vcl_show()
 * @method array param_show()
 * @method array param_set()
 * Warning: ban_url does a non-lurker-friendly ban. This means it is not cleaned
 *          up from the ban list. A long ban list will slow down Varnish.
 * @method array ban_url()
 * @method array ban()
 * @method array ban_list()
 */
class Nexcessnet_Turpentine_Model_Varnish_Admin_Socket {
namespace YourVendor;

class YourClass { }

    // possible command return codes, from vcli.h
    const CODE_SYNTAX       = 100;
    const CODE_UNKNOWN      = 101;
    const CODE_UNIMPL       = 102;
    const CODE_TOOFEW       = 104;
    const CODE_TOOMANY      = 105;
    const CODE_PARAM        = 106;
    const CODE_AUTH         = 107;
    const CODE_OK           = 200;
    const CODE_CANT         = 300;
    const CODE_COMMS        = 400;
    const CODE_CLOSE        = 500;

    const READ_CHUNK_SIZE   = 1024;
    // varnish default, can only be changed at Varnish startup time
    // if data to write is over this limit the actual run-time limit is checked
    // and used
    const CLI_CMD_LENGTH_LIMIT = 8192;

    /**
     * Regexp to detect the varnish version number
     * @var string
     */
    const REGEXP_VARNISH_VERSION = '/^varnish\-(?P<vmajor>\d)\.(?P<vminor>\d)\.(?P<vsub>\d) revision (?P<vhash>[0-9a-f]+)$/';

    /**
     * VCL config versions, should match config select values
     */
    static protected $_VERSIONS = array('2.1', '3.0', '4.0');

    /**
     * Varnish socket connection
     *
     * @var resource
     */
    protected $_varnishConn = null;
    protected $_host = '127.0.0.1';
    protected $_port = 6082;
    protected $_private = null;
    protected $_authSecret = null;
    protected $_timeout = 5;
    protected $_version = null; //auto-detect

    public function __construct(array $options = array()) {
        foreach ($options as $key => $value) {
            switch ($key) {
                case 'host':
                    $this->setHost($value);
                    break;
                case 'port':
                    $this->setPort($value);
                    break;
                case 'auth_secret':
                    $this->setAuthSecret($value);
                    break;
                case 'timeout':
                    $this->setTimeout($value);
                    break;
                case 'version':
                    $this->setVersion($value);
                    break;
                default:
                    break;
            }
        }
    }

    /**
     * Provide simple Varnish methods
     *
     * Methods provided:
            help [command]
            ping [timestamp]
            auth response
            banner
            stats
            vcl.load <configname> <filename>
            vcl.inline <configname> <quoted_VCLstring>
            vcl.use <configname>
            vcl.discard <configname>
            vcl.list
            vcl.show <configname>
            param.show [-l] [<param>]
            param.set <param> <value>
            purge.url <regexp>
            purge <field> <operator> <arg> [&& <field> <oper> <arg>]...
            purge.list
     *
     * @param  string $name method name
     * @param  array $args method args
     * @return array
     */
    public function __call($name, $args) {
        array_unshift($args, self::CODE_OK);
        array_unshift($args, $this->_translateCommandMethod($name));
        return call_user_func_array(array($this, '_command'), $args);
    }

    /**
     * Get the connection string for this socket (<host>:<port>)
     *
     * @return string
     */
    public function getConnectionString() {
        return sprintf('%s:%d', $this->getHost(), $this->getPort());
    }

    /**
     * Get the set host for this instance
     *
     * @return string
     */
    public function getHost() {
        return $this->_host;
    }

    /**
     * Set the Varnish host name/ip to connect to
     *
     * @param string $host hostname or ip
     */
    public function setHost($host) {
        $this->_close();
        $this->_host = $host;
        return $this;
    }

    /**
     * Get the port set for this instance
     *
     * @return int
     */
    public function getPort() {
        return $this->_port;
    }

    /**
     * Set the Varnish admin port
     *
     * @param int $port
     */
    public function setPort($port) {
        $this->_close();
        $this->_port = (int) $port;
        return $this;
    }

    /**
     * Set the Varnish admin auth secret, use null to indicate there isn't one
     *
     * @param string $authSecret
     */
    public function setAuthSecret($authSecret = null) {
        $this->_authSecret = $authSecret;
        return $this;
    }

    /**
     * Set the timeout to connect to the varnish instance
     *
     * @param int $timeout
     */
    public function setTimeout($timeout) {
        $this->_timeout = (int) $timeout;
        if ( ! is_null($this->_varnishConn)) {
            stream_set_timeout($this->_varnishConn, $this->_timeout);
        }
        return $this;
    }

    /**
     * Explicitly set the version of the varnish instance we're connecting to
     *
     * @param string $version version from $_VERSIONS
     */
    public function setVersion($version) {
        if (in_array($version, self::$_VERSIONS)) {
            $this->_version = $version;
        } else {
            Mage::throwException('Unsupported Varnish version: '.$version);
        }
    }

    /**
     * Check if we're connected to Varnish
     *
     * @return boolean
     */
    public function isConnected() {
        return ! is_null($this->_varnishConn);
    }

    /**
     * Find out what version mode we're running in
     *
     * @return string
     */
    public function getVersion() {
        if ( ! $this->isConnected()) {
            $this->_connect();
        }
        return $this->_version;
    }

    /**
     * Stop the Varnish instance
     */
    public function quit() {
        $this->_command('quit', self::CODE_CLOSE);
        $this->_close();
    }

    /**
     * Check if Varnish has a child running or not
     *
     * @return boolean
     */
    public function status() {
        $response = $this->_command('status');
        if ( ! preg_match('~Child in state (\w+)~', $response['text'], $match)) {
            return false;
        } else {
            return $match[1] === 'running';
        }
    }

    /**
     * Stop the running child (if it is running)
     *
     * @return $this
     */
    public function stop() {
        if ($this->status()) {
            $this->_command('stop');
        }
        return $this;
    }

    /**
     * Start running the Varnish child
     *
     * @return $this
     */
    public function start() {
        $this->_command('start');
        return $this;
    }

    /**
     * Establish a connection to the configured Varnish instance
     *
     * @return boolean
     */
    protected function _connect() {
        $this->_varnishConn = fsockopen($this->_host, $this->_port, $errno,
            $errstr, $this->_timeout);
        if ( ! is_resource($this->_varnishConn)) {
            Mage::throwException(sprintf(
                'Failed to connect to Varnish on [%s:%d]: (%d) %s',
                $this->_host, $this->_port, $errno, $errstr ));
        }

        stream_set_blocking($this->_varnishConn, 1);
        stream_set_timeout($this->_varnishConn, $this->_timeout);

        //varnish 2.0 doesn't spit out a banner on connection, this will need
        //to be changed if 2.0 support is ever added
        $banner = $this->_read();
        if ($banner['code'] === self::CODE_AUTH) {
            $challenge = substr($banner['text'], 0, 32);
            $response = hash('sha256', sprintf("%s\n%s%s\n", $challenge,
                $this->_authSecret, $challenge));
            $banner = $this->_command('auth', self::CODE_OK, $response);
        }

        if ($banner['code'] !== self::CODE_OK) {
            Mage::throwException('Varnish admin authentication failed: '.
                $banner['text']);
        }

        if ($this->_version == null) { // If autodetecting
            $this->_version = $this->_determineVersion($banner['text']);
        }

        return $this->isConnected();
    }

    /**
     * @param string $bannerText
     */
    protected function _determineVersion($bannerText) {
        $bannerText = array_filter(explode("\n", $bannerText));
        if (count($bannerText) < 6) {
            // Varnish 2.0 does not spit out a banner on connect
            Mage::throwException('Varnish versions before 2.1 are not supported');
        }
        if (count($bannerText) < 7) {
            // Varnish before 3.0.4 does not spit out a version number
            $resp = $this->_write('help')->_read();
            if (strpos($resp['text'], 'ban.url') !== false) {
                // Varnish versions 3.0 through 3.0.3 do not return a version banner. 
                // To differentiate between 2.1 and 3.0, we check the existence of the ban.url command.
                return '3.0';
            }
            return '2.1';
        } elseif (preg_match(self::REGEXP_VARNISH_VERSION, $bannerText[4], $matches) === 1) {
            return $matches['vmajor'].'.'.$matches['vminor'];
        } else {
            Mage::throwException('Unable to detect varnish version');
        }
    }

    /**
     * Close the connection (if we're connected)
     *
     * @return $this
     */
    protected function _close() {
        if ($this->isConnected()) {
            fclose($this->_varnishConn);
            $this->_varnishConn = null;
        }
        return $this;
    }

    /**
     * Write data to the Varnish instance, a newline is automatically appended
     *
     * @param  string $data data to write
     * @return $this
     */
    protected function _write($data) {
        if (is_null($this->_varnishConn)) {
            $this->_connect();
        }
        $data = rtrim($data).PHP_EOL;
        $dataLength = strlen($data);
        if ($dataLength >= self::CLI_CMD_LENGTH_LIMIT) {
            $cliBufferResponse = $this->param_show('cli_buffer');

            $regexp = '~^cli_buffer\s+(\d+)\s+\[bytes\]~';
            if ($this->getVersion() === '4.0') {
                // Varnish4 supports "16k" style notation
                $regexp = '~^cli_buffer\s+Value is:\s+(\d+)([k|m|g]{1})?\s+\[bytes\]~';
            }
            if (preg_match($regexp, $cliBufferResponse['text'], $match)) {
                $realLimit = (int) $match[1];
                if (isset($match[2])) {
                    $factors = array('k'=>1, 'm'=>2, 'g'=>3);
                    $realLimit *= pow(1024, $factors[$match[2]]);
                }
            } else {
                Mage::helper('turpentine/debug')->logWarn(
                    'Failed to determine Varnish cli_buffer limit, using default' );
                $realLimit = self::CLI_CMD_LENGTH_LIMIT;
            }
            if ($dataLength >= $realLimit) {
                Mage::throwException(sprintf(
                    'Varnish data to write over length limit by %d characters',
                    $dataLength - $realLimit ));
            }
        }
        if (($byteCount = fwrite($this->_varnishConn, $data)) !== $dataLength) {
            Mage::throwException(sprintf('Varnish socket write error: %d != %d',
                $byteCount, $dataLength));
        }
        return $this;
    }

    /**
     * Read a response from Varnish instance
     *
     * @return array tuple of the response (code, text)
     */
    protected function _read() {
        $code = null;
        $len = -1;
        while ( ! feof($this->_varnishConn)) {
            $response = fgets($this->_varnishConn, self::READ_CHUNK_SIZE);
            if (empty($response)) {
                $streamMeta = stream_get_meta_data($this->_varnishConn);
                if ($streamMeta['timed_out']) {
                    Mage::throwException('Varnish admin socket timeout');
                }
            }
            if (preg_match('~^(\d{3}) (\d+)~', $response, $match)) {
                $code = (int) $match[1];
                $len = (int) $match[2];
                break;
            }
        }

        if (is_null($code)) {
            Mage::throwException('Failed to read response code from Varnish');
        } else {
            $response = array('code' => $code, 'text' => '');
            while ( ! feof($this->_varnishConn) &&
                    strlen($response['text']) < $len) {
                $response['text'] .= fgets($this->_varnishConn,
                    self::READ_CHUNK_SIZE);
            }
            return $response;
        }
    }

    /**
     * [_command description]
     * @param  string  $verb       command name
     * @param  integer $okCode code that indicates command was successful
     * @param  string  ...         command args
     * @return array
     */
    protected function _command($verb, $okCode = 200) {
        $params = func_get_args();
        //remove $verb
        array_shift($params);
        //remove $okCode (if it exists)

        array_shift($params);
        $cleanedParams = array();
        foreach ($params as $param) {
            $cp = addcslashes($param, "\"\\");
            $cp = str_replace(PHP_EOL, '\n', $cp);
            $cleanedParams[] = sprintf('"%s"', $cp);
        }
        $data = implode(' ', array_merge(
            array(sprintf('"%s"', $verb)),
            $cleanedParams ));
        $response = $this->_write($data)->_read();
        if ($response['code'] !== $okCode && ! is_null($okCode)) {
            Mage::helper('turpentine/debug')->logDebug(
                'Error on Varnish command: %s', $data );
            Mage::throwException(sprintf(
                "Got unexpected response code from Varnish: %d\n%s",
                $response['code'], $response['text'] ));
        } else {
            return $response;
        }
    }

    /**
     * Handle v2.1 <> v3.0 command compatibility
     *
     * @param  string $verb command to check
     * @return string
     */
    protected function _translateCommandMethod($verb) {
        $command = str_replace('_', '.', $verb);
        switch ($this->getVersion()) {
            case '2.1':
                $command = str_replace('ban', 'purge', $command);
                break;
            case '4.0':
            case '3.0':
                $command = str_replace('purge', 'ban', $command);
                break;
            default:
                Mage::throwException('Unrecognized Varnish version: '.
                    $this->_version);
        }
        return $command;
    }
}


1			<?php
2
3			/**
4			* Nexcess.net Turpentine Extension for Magento
5			* Copyright (C) 2012 Nexcess.net L.L.C.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License along
18			* with this program; if not, write to the Free Software Foundation, Inc.,
19			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20			*/
21
22			/**
23			* Based heavily on Tim Whitlock's VarnishAdminSocket.php from php-varnish
24			* @link https://github.com/timwhitlock/php-varnish
25			*
26			* Copyright (c) 2010 Tim Whitlock
27			*
28			* Permission is hereby granted, free of charge, to any person obtaining a copy
29			* of this software and associated documentation files (the "Software"), to deal
30			* in the Software without restriction, including without limitation the rights
31			* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
32			* copies of the Software, and to permit persons to whom the Software is
33			* furnished to do so, subject to the following conditions:
34			*
35			* The above copyright notice and this permission notice shall be included in
36			* all copies or substantial portions of the Software.
37			*
38			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
39			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
40			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
41			* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
42			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
43			* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
44			* THE SOFTWARE.
45			*/
46
47			/**
48			* @method array help()
49			* @method array ping()
50			* @method array auth()
51			* @method array banner()
52			* @method array vcl_load()
53			* @method array vcl_inline()
54			* @method array vcl_use()
55			* @method array vcl_discard()
56			* @method array vcl_list()
57			* @method array vcl_show()
58			* @method array param_show()
59			* @method array param_set()
60			* Warning: ban_url does a non-lurker-friendly ban. This means it is not cleaned
61			* up from the ban list. A long ban list will slow down Varnish.
62			* @method array ban_url()
63			* @method array ban()
64			* @method array ban_list()
65			*/
66			class Nexcessnet_Turpentine_Model_Varnish_Admin_Socket {
			0 ignored issues – show Coding Style Compatibility introduced 2015-11-25 14:59 UTC by Report Bug Copy Issue Report PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions. You can fix this by adding a namespace to your class: namespace YourVendor; class YourClass { } When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries. Loading history...
67
68			// possible command return codes, from vcli.h
69			const CODE_SYNTAX = 100;
70			const CODE_UNKNOWN = 101;
71			const CODE_UNIMPL = 102;
72			const CODE_TOOFEW = 104;
73			const CODE_TOOMANY = 105;
74			const CODE_PARAM = 106;
75			const CODE_AUTH = 107;
76			const CODE_OK = 200;
77			const CODE_CANT = 300;
78			const CODE_COMMS = 400;
79			const CODE_CLOSE = 500;
80
81			const READ_CHUNK_SIZE = 1024;
82			// varnish default, can only be changed at Varnish startup time
83			// if data to write is over this limit the actual run-time limit is checked
84			// and used
85			const CLI_CMD_LENGTH_LIMIT = 8192;
86
87			/**
88			* Regexp to detect the varnish version number
89			* @var string
90			*/
91			const REGEXP_VARNISH_VERSION = '/^varnish\-(?P<vmajor>\d)\.(?P<vminor>\d)\.(?P<vsub>\d) revision (?P<vhash>[0-9a-f]+)$/';
92
93			/**
94			* VCL config versions, should match config select values
95			*/
96			static protected $_VERSIONS = array('2.1', '3.0', '4.0');
97
98			/**
99			* Varnish socket connection
100			*
101			* @var resource
102			*/
103			protected $_varnishConn = null;
104			protected $_host = '127.0.0.1';
105			protected $_port = 6082;
106			protected $_private = null;
107			protected $_authSecret = null;
108			protected $_timeout = 5;
109			protected $_version = null; //auto-detect
110
111			public function __construct(array $options = array()) {
112			foreach ($options as $key => $value) {
113			switch ($key) {
114			case 'host':
115			$this->setHost($value);
116			break;
117			case 'port':
118			$this->setPort($value);
119			break;
120			case 'auth_secret':
121			$this->setAuthSecret($value);
122			break;
123			case 'timeout':
124			$this->setTimeout($value);
125			break;
126			case 'version':
127			$this->setVersion($value);
128			break;
129			default:
130			break;
131			}
132			}
133			}
134
135			/**
136			* Provide simple Varnish methods
137			*
138			* Methods provided:
139			help [command]
140			ping [timestamp]
141			auth response
142			banner
143			stats
144			vcl.load <configname> <filename>
145			vcl.inline <configname> <quoted_VCLstring>
146			vcl.use <configname>
147			vcl.discard <configname>
148			vcl.list
149			vcl.show <configname>
150			param.show [-l] [<param>]
151			param.set <param> <value>
152			purge.url <regexp>
153			purge <field> <operator> <arg> [&& <field> <oper> <arg>]...
154			purge.list
155			*
156			* @param string $name method name
157			* @param array $args method args
158			* @return array
159			*/
160			public function __call($name, $args) {
161			array_unshift($args, self::CODE_OK);
162			array_unshift($args, $this->_translateCommandMethod($name));
163			return call_user_func_array(array($this, '_command'), $args);
164			}
165
166			/**
167			* Get the connection string for this socket (<host>:<port>)
168			*
169			* @return string
170			*/
171			public function getConnectionString() {
172			return sprintf('%s:%d', $this->getHost(), $this->getPort());
173			}
174
175			/**
176			* Get the set host for this instance
177			*
178			* @return string
179			*/
180			public function getHost() {
181			return $this->_host;
182			}
183
184			/**
185			* Set the Varnish host name/ip to connect to
186			*
187			* @param string $host hostname or ip
188			*/
189			public function setHost($host) {
190			$this->_close();
191			$this->_host = $host;
192			return $this;
193			}
194
195			/**
196			* Get the port set for this instance
197			*
198			* @return int
199			*/
200			public function getPort() {
201			return $this->_port;
202			}
203
204			/**
205			* Set the Varnish admin port
206			*
207			* @param int $port
208			*/
209			public function setPort($port) {
210			$this->_close();
211			$this->_port = (int) $port;
212			return $this;
213			}
214
215			/**
216			* Set the Varnish admin auth secret, use null to indicate there isn't one
217			*
218			* @param string $authSecret
219			*/
220			public function setAuthSecret($authSecret = null) {
221			$this->_authSecret = $authSecret;
222			return $this;
223			}
224
225			/**
226			* Set the timeout to connect to the varnish instance
227			*
228			* @param int $timeout
229			*/
230			public function setTimeout($timeout) {
231			$this->_timeout = (int) $timeout;
232			if ( ! is_null($this->_varnishConn)) {
233			stream_set_timeout($this->_varnishConn, $this->_timeout);
234			}
235			return $this;
236			}
237
238			/**
239			* Explicitly set the version of the varnish instance we're connecting to
240			*
241			* @param string $version version from $_VERSIONS
242			*/
243			public function setVersion($version) {
244			if (in_array($version, self::$_VERSIONS)) {
245			$this->_version = $version;
246			} else {
247			Mage::throwException('Unsupported Varnish version: '.$version);
248			}
249			}
250
251			/**
252			* Check if we're connected to Varnish
253			*
254			* @return boolean
255			*/
256			public function isConnected() {
257			return ! is_null($this->_varnishConn);
258			}
259
260			/**
261			* Find out what version mode we're running in
262			*
263			* @return string
264			*/
265			public function getVersion() {
266			if ( ! $this->isConnected()) {
267			$this->_connect();
268			}
269			return $this->_version;
270			}
271
272			/**
273			* Stop the Varnish instance
274			*/
275			public function quit() {
276			$this->_command('quit', self::CODE_CLOSE);
277			$this->_close();
278			}
279
280			/**
281			* Check if Varnish has a child running or not
282			*
283			* @return boolean
284			*/
285			public function status() {
286			$response = $this->_command('status');
287			if ( ! preg_match('~Child in state (\w+)~', $response['text'], $match)) {
288			return false;
289			} else {
290			return $match[1] === 'running';
291			}
292			}
293
294			/**
295			* Stop the running child (if it is running)
296			*
297			* @return $this
298			*/
299			public function stop() {
300			if ($this->status()) {
301			$this->_command('stop');
302			}
303			return $this;
304			}
305
306			/**
307			* Start running the Varnish child
308			*
309			* @return $this
310			*/
311			public function start() {
312			$this->_command('start');
313			return $this;
314			}
315
316			/**
317			* Establish a connection to the configured Varnish instance
318			*
319			* @return boolean
320			*/
321			protected function _connect() {
322			$this->_varnishConn = fsockopen($this->_host, $this->_port, $errno,
323			$errstr, $this->_timeout);
324			if ( ! is_resource($this->_varnishConn)) {
325			Mage::throwException(sprintf(
326			'Failed to connect to Varnish on [%s:%d]: (%d) %s',
327			$this->_host, $this->_port, $errno, $errstr ));
328			}
329
330			stream_set_blocking($this->_varnishConn, 1);
331			stream_set_timeout($this->_varnishConn, $this->_timeout);
332
333			//varnish 2.0 doesn't spit out a banner on connection, this will need
334			//to be changed if 2.0 support is ever added
335			$banner = $this->_read();
336			if ($banner['code'] === self::CODE_AUTH) {
337			$challenge = substr($banner['text'], 0, 32);
338			$response = hash('sha256', sprintf("%s\n%s%s\n", $challenge,
339			$this->_authSecret, $challenge));
340			$banner = $this->_command('auth', self::CODE_OK, $response);
341			}
342
343			if ($banner['code'] !== self::CODE_OK) {
344			Mage::throwException('Varnish admin authentication failed: '.
345			$banner['text']);
346			}
347
348			if ($this->_version == null) { // If autodetecting
349			$this->_version = $this->_determineVersion($banner['text']);
350			}
351
352			return $this->isConnected();
353			}
354
355			/**
356			* @param string $bannerText
357			*/
358			protected function _determineVersion($bannerText) {
359			$bannerText = array_filter(explode("\n", $bannerText));
360			if (count($bannerText) < 6) {
361			// Varnish 2.0 does not spit out a banner on connect
362			Mage::throwException('Varnish versions before 2.1 are not supported');
363			}
364			if (count($bannerText) < 7) {
365			// Varnish before 3.0.4 does not spit out a version number
366			$resp = $this->_write('help')->_read();
367			if (strpos($resp['text'], 'ban.url') !== false) {
368			// Varnish versions 3.0 through 3.0.3 do not return a version banner.
369			// To differentiate between 2.1 and 3.0, we check the existence of the ban.url command.
370			return '3.0';
371			}
372			return '2.1';
373			} elseif (preg_match(self::REGEXP_VARNISH_VERSION, $bannerText[4], $matches) === 1) {
374			return $matches['vmajor'].'.'.$matches['vminor'];
375			} else {
376			Mage::throwException('Unable to detect varnish version');
377			}
378			}
379
380			/**
381			* Close the connection (if we're connected)
382			*
383			* @return $this
384			*/
385			protected function _close() {
386			if ($this->isConnected()) {
387			fclose($this->_varnishConn);
388			$this->_varnishConn = null;
389			}
390			return $this;
391			}
392
393			/**
394			* Write data to the Varnish instance, a newline is automatically appended
395			*
396			* @param string $data data to write
397			* @return $this
398			*/
399			protected function _write($data) {
400			if (is_null($this->_varnishConn)) {
401			$this->_connect();
402			}
403			$data = rtrim($data).PHP_EOL;
404			$dataLength = strlen($data);
405			if ($dataLength >= self::CLI_CMD_LENGTH_LIMIT) {
406			$cliBufferResponse = $this->param_show('cli_buffer');
			0 ignored issues – show Unused Code introduced 2015-11-25 14:59 UTC by Report Bug Copy Issue Report The call to `Nexcessnet_Turpentine_Mo...in_Socket::param_show()` has too many arguments starting with `'cli_buffer'`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
407			$regexp = '~^cli_buffer\s+(\d+)\s+\[bytes\]~';
408			if ($this->getVersion() === '4.0') {
409			// Varnish4 supports "16k" style notation
410			$regexp = '~^cli_buffer\s+Value is:\s+(\d+)([k\|m\|g]{1})?\s+\[bytes\]~';
411			}
412			if (preg_match($regexp, $cliBufferResponse['text'], $match)) {
413			$realLimit = (int) $match[1];
414			if (isset($match[2])) {
415			$factors = array('k'=>1, 'm'=>2, 'g'=>3);
416			$realLimit *= pow(1024, $factors[$match[2]]);
417			}
418			} else {
419			Mage::helper('turpentine/debug')->logWarn(
420			'Failed to determine Varnish cli_buffer limit, using default' );
421			$realLimit = self::CLI_CMD_LENGTH_LIMIT;
422			}
423			if ($dataLength >= $realLimit) {
424			Mage::throwException(sprintf(
425			'Varnish data to write over length limit by %d characters',
426			$dataLength - $realLimit ));
427			}
428			}
429			if (($byteCount = fwrite($this->_varnishConn, $data)) !== $dataLength) {
430			Mage::throwException(sprintf('Varnish socket write error: %d != %d',
431			$byteCount, $dataLength));
432			}
433			return $this;
434			}
435
436			/**
437			* Read a response from Varnish instance
438			*
439			* @return array tuple of the response (code, text)
440			*/
441			protected function _read() {
442			$code = null;
443			$len = -1;
444			while ( ! feof($this->_varnishConn)) {
445			$response = fgets($this->_varnishConn, self::READ_CHUNK_SIZE);
446			if (empty($response)) {
447			$streamMeta = stream_get_meta_data($this->_varnishConn);
448			if ($streamMeta['timed_out']) {
449			Mage::throwException('Varnish admin socket timeout');
450			}
451			}
452			if (preg_match('~^(\d{3}) (\d+)~', $response, $match)) {
453			$code = (int) $match[1];
454			$len = (int) $match[2];
455			break;
456			}
457			}
458
459			if (is_null($code)) {
460			Mage::throwException('Failed to read response code from Varnish');
461			} else {
462			$response = array('code' => $code, 'text' => '');
463			while ( ! feof($this->_varnishConn) &&
464			strlen($response['text']) < $len) {
465			$response['text'] .= fgets($this->_varnishConn,
466			self::READ_CHUNK_SIZE);
467			}
468			return $response;
469			}
470			}
471
472			/**
473			* [_command description]
474			* @param string $verb command name
475			* @param integer $okCode code that indicates command was successful
476			* @param string ... command args
477			* @return array
478			*/
479			protected function _command($verb, $okCode = 200) {
480			$params = func_get_args();
481			//remove $verb
482			array_shift($params);
483			//remove $okCode (if it exists)
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-02-10 00:05 UTC by Report Bug Copy Issue Report `37%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
484			array_shift($params);
485			$cleanedParams = array();
486			foreach ($params as $param) {
487			$cp = addcslashes($param, "\"\\");
488			$cp = str_replace(PHP_EOL, '\n', $cp);
489			$cleanedParams[] = sprintf('"%s"', $cp);
490			}
491			$data = implode(' ', array_merge(
492			array(sprintf('"%s"', $verb)),
493			$cleanedParams ));
494			$response = $this->_write($data)->_read();
495			if ($response['code'] !== $okCode && ! is_null($okCode)) {
496			Mage::helper('turpentine/debug')->logDebug(
497			'Error on Varnish command: %s', $data );
498			Mage::throwException(sprintf(
499			"Got unexpected response code from Varnish: %d\n%s",
500			$response['code'], $response['text'] ));
501			} else {
502			return $response;
503			}
504			}
505
506			/**
507			* Handle v2.1 <> v3.0 command compatibility
508			*
509			* @param string $verb command to check
510			* @return string
511			*/
512			protected function _translateCommandMethod($verb) {
513			$command = str_replace('_', '.', $verb);
514			switch ($this->getVersion()) {
515			case '2.1':
516			$command = str_replace('ban', 'purge', $command);
517			break;
518			case '4.0':
519			case '3.0':
520			$command = str_replace('purge', 'ban', $command);
521			break;
522			default:
523			Mage::throwException('Unrecognized Varnish version: '.
524			$this->_version);
525			}
526			return $command;
527			}
528			}
529

nexcess / magento-turpentine

Pull Request — devel (#1212)

start() A

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