3755643596

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Merge pull request #7004 from kenjis/fix-db-session-tests

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0.0

/system/Session/Handlers/MemcachedHandler.php

<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace CodeIgniter\Session\Handlers;

use CodeIgniter\I18n\Time;
use CodeIgniter\Session\Exceptions\SessionException;
use Config\App as AppConfig;
use Memcached;
use ReturnTypeWillChange;

/**
 * Session handler using Memcache for persistence
 */
class MemcachedHandler extends BaseHandler
{
    /**
     * Memcached instance
     *
     * @var Memcached|null
     */
    protected $memcached;

    /**
     * Key prefix
     *
     * @var string
     */
    protected $keyPrefix = 'ci_session:';

    /**
     * Lock key
     *
     * @var string|null
     */
    protected $lockKey;

    /**
     * Number of seconds until the session ends.
     *
     * @var int
     */
    protected $sessionExpiration = 7200;

    /**
     * @throws SessionException
     */
    public function __construct(AppConfig $config, string $ipAddress)
    {
        parent::__construct($config, $ipAddress);

        if (empty($this->savePath)) {
            throw SessionException::forEmptySavepath();
        }

        // Add sessionCookieName for multiple session cookies.
        $this->keyPrefix .= $config->sessionCookieName . ':';

        if ($this->matchIP === true) {
            $this->keyPrefix .= $this->ipAddress . ':';
        }

        if (! empty($this->keyPrefix)) {
            ini_set('memcached.sess_prefix', $this->keyPrefix);
        }

        $this->sessionExpiration = $config->sessionExpiration;
    }

    /**
     * Re-initialize existing session, or creates a new one.
     *
     * @param string $path The path where to store/retrieve the session
     * @param string $name The session name
     */
    public function open($path, $name): bool
    {
        $this->memcached = new Memcached();
        $this->memcached->setOption(Memcached::OPT_BINARY_PROTOCOL, true); // required for touch() usage

        $serverList = [];

        foreach ($this->memcached->getServerList() as $server) {
            $serverList[] = $server['host'] . ':' . $server['port'];
        }

        if (
            ! preg_match_all(
                '#,?([^,:]+)\:(\d{1,5})(?:\:(\d+))?#',
                $this->savePath,
                $matches,
                PREG_SET_ORDER
            )
        ) {
            $this->memcached = null;
            $this->logger->error('Session: Invalid Memcached save path format: ' . $this->savePath);

            return false;
        }

        foreach ($matches as $match) {
            // If Memcached already has this server (or if the port is invalid), skip it
            if (in_array($match[1] . ':' . $match[2], $serverList, true)) {
                $this->logger->debug(
                    'Session: Memcached server pool already has ' . $match[1] . ':' . $match[2]
                );

                continue;
            }

            if (! $this->memcached->addServer($match[1], (int) $match[2], $match[3] ?? 0)) {
                $this->logger->error(
                    'Could not add ' . $match[1] . ':' . $match[2] . ' to Memcached server pool.'
                );
            } else {
                $serverList[] = $match[1] . ':' . $match[2];
            }
        }

        if (empty($serverList)) {
            $this->logger->error('Session: Memcached server pool is empty.');

            return false;
        }

        return true;
    }

    /**
     * Reads the session data from the session storage, and returns the results.
     *
     * @param string $id The session ID
     *
     * @return false|string Returns an encoded string of the read data.
     *                      If nothing was read, it must return false.
     */
    #[ReturnTypeWillChange]
    public function read($id)
    {
        if (isset($this->memcached) && $this->lockSession($id)) {
            if (! isset($this->sessionID)) {
                $this->sessionID = $id;
            }

            $data = (string) $this->memcached->get($this->keyPrefix . $id);

            $this->fingerprint = md5($data);

            return $data;
        }

        return '';
    }

    /**
     * Writes the session data to the session storage.
     *
     * @param string $id   The session ID
     * @param string $data The encoded session data
     */
    public function write($id, $data): bool
    {
        if (! isset($this->memcached)) {
            return false;
        }

        if ($this->sessionID !== $id) {
            if (! $this->releaseLock() || ! $this->lockSession($id)) {
                return false;
            }

            $this->fingerprint = md5('');
            $this->sessionID   = $id;
        }

        if (isset($this->lockKey)) {
            $this->memcached->replace($this->lockKey, Time::now()->getTimestamp(), 300);

            if ($this->fingerprint !== ($fingerprint = md5($data))) {
                if ($this->memcached->set($this->keyPrefix . $id, $data, $this->sessionExpiration)) {
                    $this->fingerprint = $fingerprint;

                    return true;
                }

                return false;
            }

            return $this->memcached->touch($this->keyPrefix . $id, $this->sessionExpiration);
        }

        return false;
    }

    /**
     * Closes the current session.
     */
    public function close(): bool
    {
        if (isset($this->memcached)) {
            if (isset($this->lockKey)) {
                $this->memcached->delete($this->lockKey);
            }

            if (! $this->memcached->quit()) {
                return false;
            }

            $this->memcached = null;

            return true;
        }

        return false;
    }

    /**
     * Destroys a session
     *
     * @param string $id The session ID being destroyed
     */
    public function destroy($id): bool
    {
        if (isset($this->memcached, $this->lockKey)) {
            $this->memcached->delete($this->keyPrefix . $id);

            return $this->destroyCookie();
        }

        return false;
    }

    /**
     * Cleans up expired sessions.
     *
     * @param int $max_lifetime Sessions that have not updated
     *                          for the last max_lifetime seconds will be removed.
     *
     * @return false|int Returns the number of deleted sessions on success, or false on failure.
     */
    #[ReturnTypeWillChange]
    public function gc($max_lifetime)
    {
        return 1;
    }

    /**
     * Acquires an emulated lock.
     *
     * @param string $sessionID Session ID
     */
    protected function lockSession(string $sessionID): bool
    {
        if (isset($this->lockKey)) {
            return $this->memcached->replace($this->lockKey, Time::now()->getTimestamp(), 300);
        }

        $lockKey = $this->keyPrefix . $sessionID . ':lock';
        $attempt = 0;

        do {
            if ($this->memcached->get($lockKey)) {
                sleep(1);

                continue;
            }

            if (! $this->memcached->set($lockKey, Time::now()->getTimestamp(), 300)) {
                $this->logger->error(
                    'Session: Error while trying to obtain lock for ' . $this->keyPrefix . $sessionID
                );

                return false;
            }

            $this->lockKey = $lockKey;
            break;
        } while (++$attempt < 30);

        if ($attempt === 30) {
            $this->logger->error(
                'Session: Unable to obtain lock for ' . $this->keyPrefix . $sessionID . ' after 30 attempts, aborting.'
            );

            return false;
        }

        $this->lock = true;

        return true;
    }

    /**
     * Releases a previously acquired lock
     */
    protected function releaseLock(): bool
    {
        if (isset($this->memcached, $this->lockKey) && $this->lock) {
            if (
                ! $this->memcached->delete($this->lockKey)
                && $this->memcached->getResultCode() !== Memcached::RES_NOTFOUND
            ) {
                $this->logger->error(
                    'Session: Error while trying to free lock for ' . $this->lockKey
                );

                return false;
            }

            $this->lockKey = null;
            $this->lock    = false;
        }

        return true;
    }
}

1	<?php
2
3	/**
4	* This file is part of CodeIgniter 4 framework.
5	*
6	* (c) CodeIgniter Foundation <admin@codeigniter.com>
7	*
8	* For the full copyright and license information, please view
9	* the LICENSE file that was distributed with this source code.
10	*/
11
12	namespace CodeIgniter\Session\Handlers;
13
14	use CodeIgniter\I18n\Time;
15	use CodeIgniter\Session\Exceptions\SessionException;
16	use Config\App as AppConfig;
17	use Memcached;
18	use ReturnTypeWillChange;
19
20	/**
21	* Session handler using Memcache for persistence
22	*/
23	class MemcachedHandler extends BaseHandler
24	{
25	/**
26	* Memcached instance
27	*
28	* @var Memcached\|null
29	*/
30	protected $memcached;
31
32	/**
33	* Key prefix
34	*
35	* @var string
36	*/
37	protected $keyPrefix = 'ci_session:';
38
39	/**
40	* Lock key
41	*
42	* @var string\|null
43	*/
44	protected $lockKey;
45
46	/**
47	* Number of seconds until the session ends.
48	*
49	* @var int
50	*/
51	protected $sessionExpiration = 7200;
52
53	/**
54	* @throws SessionException
55	*/
56	public function __construct(AppConfig $config, string $ipAddress)
57	{
58	parent::__construct($config, $ipAddress);	×
59
60	if (empty($this->savePath)) {	×
61	throw SessionException::forEmptySavepath();	×
62	}
63
64	// Add sessionCookieName for multiple session cookies.
65	$this->keyPrefix .= $config->sessionCookieName . ':';	×
66
67	if ($this->matchIP === true) {	×
68	$this->keyPrefix .= $this->ipAddress . ':';	×
69	}
70
71	if (! empty($this->keyPrefix)) {	×
72	ini_set('memcached.sess_prefix', $this->keyPrefix);	×
73	}
74
75	$this->sessionExpiration = $config->sessionExpiration;	×
76	}
77
78	/**
79	* Re-initialize existing session, or creates a new one.
80	*
81	* @param string $path The path where to store/retrieve the session
82	* @param string $name The session name
83	*/
84	public function open($path, $name): bool
85	{
86	$this->memcached = new Memcached();	×
87	$this->memcached->setOption(Memcached::OPT_BINARY_PROTOCOL, true); // required for touch() usage	×
88
89	$serverList = [];	×
90
91	foreach ($this->memcached->getServerList() as $server) {	×
92	$serverList[] = $server['host'] . ':' . $server['port'];	×
93	}
94
95	if (
96	! preg_match_all(	×
97	'#,?([^,:]+)\:(\d{1,5})(?:\:(\d+))?#',	×
98	$this->savePath,	×
99	$matches,	×
100	PREG_SET_ORDER	×
101	)	×
102	) {
103	$this->memcached = null;	×
104	$this->logger->error('Session: Invalid Memcached save path format: ' . $this->savePath);	×
105
106	return false;	×
107	}
108
109	foreach ($matches as $match) {	×
110	// If Memcached already has this server (or if the port is invalid), skip it
111	if (in_array($match[1] . ':' . $match[2], $serverList, true)) {	×
112	$this->logger->debug(	×
113	'Session: Memcached server pool already has ' . $match[1] . ':' . $match[2]	×
114	);	×
115
116	continue;	×
117	}
118
119	if (! $this->memcached->addServer($match[1], (int) $match[2], $match[3] ?? 0)) {	×
120	$this->logger->error(	×
121	'Could not add ' . $match[1] . ':' . $match[2] . ' to Memcached server pool.'	×
122	);	×
123	} else {
124	$serverList[] = $match[1] . ':' . $match[2];	×
125	}
126	}
127
128	if (empty($serverList)) {	×
129	$this->logger->error('Session: Memcached server pool is empty.');	×
130
131	return false;	×
132	}
133
134	return true;	×
135	}
136
137	/**
138	* Reads the session data from the session storage, and returns the results.
139	*
140	* @param string $id The session ID
141	*
142	* @return false\|string Returns an encoded string of the read data.
143	* If nothing was read, it must return false.
144	*/
145	#[ReturnTypeWillChange]
146	public function read($id)
147	{
148	if (isset($this->memcached) && $this->lockSession($id)) {	×
149	if (! isset($this->sessionID)) {	×
150	$this->sessionID = $id;	×
151	}
152
153	$data = (string) $this->memcached->get($this->keyPrefix . $id);	×
154
155	$this->fingerprint = md5($data);	×
156
157	return $data;	×
158	}
159
160	return '';	×
161	}
162
163	/**
164	* Writes the session data to the session storage.
165	*
166	* @param string $id The session ID
167	* @param string $data The encoded session data
168	*/
169	public function write($id, $data): bool
170	{
171	if (! isset($this->memcached)) {	×
172	return false;	×
173	}
174
175	if ($this->sessionID !== $id) {	×
176	if (! $this->releaseLock() \|\| ! $this->lockSession($id)) {	×
177	return false;	×
178	}
179
180	$this->fingerprint = md5('');	×
181	$this->sessionID = $id;	×
182	}
183
184	if (isset($this->lockKey)) {	×
185	$this->memcached->replace($this->lockKey, Time::now()->getTimestamp(), 300);	×
186
187	if ($this->fingerprint !== ($fingerprint = md5($data))) {	×
188	if ($this->memcached->set($this->keyPrefix . $id, $data, $this->sessionExpiration)) {	×
189	$this->fingerprint = $fingerprint;	×
190
191	return true;	×
192	}
193
194	return false;	×
195	}
196
197	return $this->memcached->touch($this->keyPrefix . $id, $this->sessionExpiration);	×
198	}
199
200	return false;	×
201	}
202
203	/**
204	* Closes the current session.
205	*/
206	public function close(): bool
207	{
208	if (isset($this->memcached)) {	×
209	if (isset($this->lockKey)) {	×
210	$this->memcached->delete($this->lockKey);	×
211	}
212
213	if (! $this->memcached->quit()) {	×
214	return false;	×
215	}
216
217	$this->memcached = null;	×
218
219	return true;	×
220	}
221
222	return false;	×
223	}
224
225	/**
226	* Destroys a session
227	*
228	* @param string $id The session ID being destroyed
229	*/
230	public function destroy($id): bool
231	{
232	if (isset($this->memcached, $this->lockKey)) {	×
233	$this->memcached->delete($this->keyPrefix . $id);	×
234
235	return $this->destroyCookie();	×
236	}
237
238	return false;	×
239	}
240
241	/**
242	* Cleans up expired sessions.
243	*
244	* @param int $max_lifetime Sessions that have not updated
245	* for the last max_lifetime seconds will be removed.
246	*
247	* @return false\|int Returns the number of deleted sessions on success, or false on failure.
248	*/
249	#[ReturnTypeWillChange]
250	public function gc($max_lifetime)
251	{
252	return 1;	×
253	}
254
255	/**
256	* Acquires an emulated lock.
257	*
258	* @param string $sessionID Session ID
259	*/
260	protected function lockSession(string $sessionID): bool
261	{
262	if (isset($this->lockKey)) {	×
263	return $this->memcached->replace($this->lockKey, Time::now()->getTimestamp(), 300);	×
264	}
265
266	$lockKey = $this->keyPrefix . $sessionID . ':lock';	×
267	$attempt = 0;	×
268
269	do {
270	if ($this->memcached->get($lockKey)) {	×
271	sleep(1);	×
272
273	continue;	×
274	}
275
276	if (! $this->memcached->set($lockKey, Time::now()->getTimestamp(), 300)) {	×
277	$this->logger->error(	×
278	'Session: Error while trying to obtain lock for ' . $this->keyPrefix . $sessionID	×
279	);	×
280
281	return false;	×
282	}
283
284	$this->lockKey = $lockKey;	×
285	break;	×
286	} while (++$attempt < 30);	×
287
288	if ($attempt === 30) {	×
289	$this->logger->error(	×
290	'Session: Unable to obtain lock for ' . $this->keyPrefix . $sessionID . ' after 30 attempts, aborting.'	×
291	);	×
292
293	return false;	×
294	}
295
296	$this->lock = true;	×
297
298	return true;	×
299	}
300
301	/**
302	* Releases a previously acquired lock
303	*/
304	protected function releaseLock(): bool
305	{
306	if (isset($this->memcached, $this->lockKey) && $this->lock) {	×
307	if (
308	! $this->memcached->delete($this->lockKey)	×
309	&& $this->memcached->getResultCode() !== Memcached::RES_NOTFOUND	×
310	) {
311	$this->logger->error(	×
312	'Session: Error while trying to free lock for ' . $this->lockKey	×
313	);	×
314
315	return false;	×
316	}
317
318	$this->lockKey = null;	×
319	$this->lock = false;	×
320	}
321
322	return true;	×
323	}
324	}

codeigniter4 / CodeIgniter4 / 3755643596

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