CacheMiddleware::invalidateCache() - Code Metrics - Inspection of "Remove useless importe from test" - Kevinrob/guzzle-cache-middleware - Measure and Improve Code Quality continuously with Scrutinizer

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by Kevin

created 2019-10-21 12:31 UTC

CacheMiddleware::invalidateCache() A

↳ Parent: CacheMiddleware

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	6
ccs	3
cts	3
cp	1
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	2
crap	1

<?php

namespace Kevinrob\GuzzleCache;

use GuzzleHttp\Client;
use GuzzleHttp\Exception\TransferException;
use GuzzleHttp\Promise\FulfilledPromise;
use GuzzleHttp\Promise\Promise;
use GuzzleHttp\Promise\RejectedPromise;
use GuzzleHttp\Psr7\Response;
use Kevinrob\GuzzleCache\Strategy\CacheStrategyInterface;
use Kevinrob\GuzzleCache\Strategy\PrivateCacheStrategy;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

/**
 * Class CacheMiddleware.
 */
class CacheMiddleware
{
    const HEADER_RE_VALIDATION = 'X-Kevinrob-GuzzleCache-ReValidation';
    const HEADER_INVALIDATION = 'X-Kevinrob-GuzzleCache-Invalidation';
    const HEADER_CACHE_INFO = 'X-Kevinrob-Cache';
    const HEADER_CACHE_HIT = 'HIT';
    const HEADER_CACHE_MISS = 'MISS';
    const HEADER_CACHE_STALE = 'STALE';

    /**
     * @var array of Promise
     */
    protected $waitingRevalidate = [];

    /**
     * @var Client
     */
    protected $client;

    /**
     * @var CacheStrategyInterface
     */
    protected $cacheStorage;

    /**
     * List of allowed HTTP methods to cache
     * Key = method name (upscaling)
     * Value = true.
     *
     * @var array
     */
    protected $httpMethods = ['GET' => true];

    /**
     * @param CacheStrategyInterface|null $cacheStrategy
     */
    public function __construct(CacheStrategyInterface $cacheStrategy = null)
    {
        $this->cacheStorage = $cacheStrategy !== null ? $cacheStrategy : new PrivateCacheStrategy();

        register_shutdown_function([$this, 'purgeReValidation']);
    }

    /**
     * @param Client $client
     */
    public function setClient(Client $client)
    {
        $this->client = $client;
    }

    /**
     * @param CacheStrategyInterface $cacheStorage
     */
    public function setCacheStorage(CacheStrategyInterface $cacheStorage)
    {
        $this->cacheStorage = $cacheStorage;
    }

    /**
     * @return CacheStrategyInterface
     */
    public function getCacheStorage()
    {
        return $this->cacheStorage;
    }

    /**
     * @param array $methods
     */
    public function setHttpMethods(array $methods)
    {
        $this->httpMethods = $methods;
    }

    public function getHttpMethods()
    {
        return $this->httpMethods;
    }

    /**
     * Will be called at the end of the script.
     */
    public function purgeReValidation()
    {
        \GuzzleHttp\Promise\inspect_all($this->waitingRevalidate);
    }

    /**
     * @param callable $handler
     *
     * @return callable
     */
    public function __invoke(callable $handler)
    {
        return function (RequestInterface $request, array $options) use (&$handler) {
            if (!isset($this->httpMethods[strtoupper($request->getMethod())])) {
                // No caching for this method allowed

                return $handler($request, $options)->then(
                    function (ResponseInterface $response) use ($request) {
                        // Invalidate cache after a call of non-safe method on the same URI
                        $response = $this->invalidateCache($request, $response);

                        return $response->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_MISS);
                    }
                );
            }

            if ($request->hasHeader(self::HEADER_RE_VALIDATION)) {
                // It's a re-validation request, so bypass the cache!
                return $handler($request->withoutHeader(self::HEADER_RE_VALIDATION), $options);
            }

            // Retrieve information from request (Cache-Control)
            $reqCacheControl = new KeyValueHttpHeader($request->getHeader('Cache-Control'));
            $onlyFromCache = $reqCacheControl->has('only-if-cached');
            $staleResponse = $reqCacheControl->has('max-stale')
                && $reqCacheControl->get('max-stale') === '';
            $maxStaleCache = $reqCacheControl->get('max-stale', null);
            $minFreshCache = $reqCacheControl->get('min-fresh', null);

            // If cache => return new FulfilledPromise(...) with response
            $cacheEntry = $this->cacheStorage->fetch($request);
            if ($cacheEntry instanceof CacheEntry) {
                $body = $cacheEntry->getResponse()->getBody();
                if ($body->tell() > 0) {
                    $body->rewind();
                }

                if ($cacheEntry->isFresh()
                    && ($minFreshCache === null || $cacheEntry->getStaleAge() + (int)$minFreshCache <= 0)
                ) {
                    // Cache HIT!
                    return new FulfilledPromise(
                        $cacheEntry->getResponse()->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_HIT)
                    );
                } elseif ($staleResponse
                    || ($maxStaleCache !== null && $cacheEntry->getStaleAge() <= $maxStaleCache)
                ) {
                    // Staled cache!
                    return new FulfilledPromise(
                        $cacheEntry->getResponse()->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_HIT)
                    );
                } elseif ($cacheEntry->hasValidationInformation() && !$onlyFromCache) {
                    // Re-validation header
                    $request = static::getRequestWithReValidationHeader($request, $cacheEntry);

                    if ($cacheEntry->staleWhileValidate()) {
                        static::addReValidationRequest($request, $this->cacheStorage, $cacheEntry);

                        return new FulfilledPromise(
                            $cacheEntry->getResponse()
                                ->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_STALE)
                        );
                    }
                }
            } else {
                $cacheEntry = null;
            }

            if ($cacheEntry === null && $onlyFromCache) {
                // Explicit asking of a cached response => 504
                return new FulfilledPromise(
                    new Response(504)
                );
            }

            /** @var Promise $promise */
            $promise = $handler($request, $options);

            return $promise->then(
                function (ResponseInterface $response) use ($request, $cacheEntry) {
                    // Check if error and looking for a staled content
                    if ($response->getStatusCode() >= 500) {
                        $responseStale = static::getStaleResponse($cacheEntry);
                        if ($responseStale instanceof ResponseInterface) {
                            return $responseStale;
                        }
                    }

                    $update = false;

                    if ($response->getStatusCode() == 304 && $cacheEntry instanceof CacheEntry) {
                        // Not modified => cache entry is re-validate
                        /** @var ResponseInterface $response */
                        $response = $response
                            ->withStatus($cacheEntry->getResponse()->getStatusCode())
                            ->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_HIT);
                        $response = $response->withBody($cacheEntry->getResponse()->getBody());

                        // Merge headers of the "304 Not Modified" and the cache entry
                        /**
                         * @var string $headerName
                         * @var string[] $headerValue
                         */
                        foreach ($cacheEntry->getOriginalResponse()->getHeaders() as $headerName => $headerValue) {

                            if (!$response->hasHeader($headerName) && $headerName !== self::HEADER_CACHE_INFO) {
                                $response = $response->withHeader($headerName, $headerValue);
                            }
                        }

                        $update = true;
                    } else {
                        $response = $response->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_MISS);
                    }

                    return static::addToCache($this->cacheStorage, $request, $response, $update);
                },
                function ($reason) use ($cacheEntry) {
                    if ($reason instanceof TransferException) {
                        $response = static::getStaleResponse($cacheEntry);
                        if ($response instanceof ResponseInterface) {
                            return $response;
                        }
                    }

                    return new RejectedPromise($reason);
                }
            );
        };
    }

    /**
     * @param CacheStrategyInterface $cache
     * @param RequestInterface $request
     * @param ResponseInterface $response
     * @param bool $update cache
     * @return ResponseInterface
     */
    protected static function addToCache(
        CacheStrategyInterface $cache,
        RequestInterface $request,
        ResponseInterface $response,
        $update = false
    ) {
        // If the body is not seekable, we have to replace it by a seekable one
        if (!$response->getBody()->isSeekable()) {
            $response = $response->withBody(
                \GuzzleHttp\Psr7\stream_for($response->getBody()->getContents())
            );
        }

        if ($update) {
            $cache->update($request, $response);
        } else {
            $cache->cache($request, $response);
        }

        return $response;
    }

    /**
     * @param RequestInterface       $request
     * @param CacheStrategyInterface $cacheStorage
     * @param CacheEntry             $cacheEntry
     *
     * @return bool if added
     */
    protected function addReValidationRequest(
        RequestInterface $request,
        CacheStrategyInterface &$cacheStorage,
        CacheEntry $cacheEntry
    ) {
        // Add the promise for revalidate
        if ($this->client !== null) {
            /** @var RequestInterface $request */
            $request = $request->withHeader(self::HEADER_RE_VALIDATION, '1');
            $this->waitingRevalidate[] = $this->client
                ->sendAsync($request)
                ->then(function (ResponseInterface $response) use ($request, &$cacheStorage, $cacheEntry) {
                    $update = false;

                    if ($response->getStatusCode() == 304) {
                        // Not modified => cache entry is re-validate
                        /** @var ResponseInterface $response */
                        $response = $response->withStatus($cacheEntry->getResponse()->getStatusCode());
                        $response = $response->withBody($cacheEntry->getResponse()->getBody());

                        // Merge headers of the "304 Not Modified" and the cache entry
                        foreach ($cacheEntry->getResponse()->getHeaders() as $headerName => $headerValue) {

                            if (!$response->hasHeader($headerName)) {
                                $response = $response->withHeader($headerName, $headerValue);
                            }
                        }

                        $update = true;
                    }

                    static::addToCache($cacheStorage, $request, $response, $update);
                });

            return true;
        }

        return false;
    }

    /**
     * @param CacheEntry|null $cacheEntry
     *
     * @return null|ResponseInterface
     */
    protected static function getStaleResponse(CacheEntry $cacheEntry = null)
    {
        // Return staled cache entry if we can
        if ($cacheEntry instanceof CacheEntry && $cacheEntry->serveStaleIfError()) {
            return $cacheEntry->getResponse()
                ->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_STALE);
        }

        return;
    }

    /**
     * @param RequestInterface $request
     * @param CacheEntry       $cacheEntry
     *
     * @return RequestInterface
     */
    protected static function getRequestWithReValidationHeader(RequestInterface $request, CacheEntry $cacheEntry)
    {
        if ($cacheEntry->getResponse()->hasHeader('Last-Modified')) {
            $request = $request->withHeader(
                'If-Modified-Since',
                $cacheEntry->getResponse()->getHeader('Last-Modified')
            );
        }
        if ($cacheEntry->getResponse()->hasHeader('Etag')) {
            $request = $request->withHeader(
                'If-None-Match',
                $cacheEntry->getResponse()->getHeader('Etag')
            );
        }

        return $request;
    }

    /**
     * @param CacheStrategyInterface|null $cacheStorage
     *
     * @return CacheMiddleware the Middleware for Guzzle HandlerStack
     *
     * @deprecated Use constructor => `new CacheMiddleware()`
     */
    public static function getMiddleware(CacheStrategyInterface $cacheStorage = null)
    {
        return new self($cacheStorage);
    }

    /**
     * @param RequestInterface $request
     *
     * @param ResponseInterface $response
     *
     * @return ResponseInterface
     */
    private function invalidateCache(RequestInterface $request, ResponseInterface $response)
    {
        $this->cacheStorage->delete($request);

        return $response->withHeader(self::HEADER_INVALIDATION, true);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
    }
}


1			<?php
2
3			namespace Kevinrob\GuzzleCache;
4
5			use GuzzleHttp\Client;
6			use GuzzleHttp\Exception\TransferException;
7			use GuzzleHttp\Promise\FulfilledPromise;
8			use GuzzleHttp\Promise\Promise;
9			use GuzzleHttp\Promise\RejectedPromise;
10			use GuzzleHttp\Psr7\Response;
11			use Kevinrob\GuzzleCache\Strategy\CacheStrategyInterface;
12			use Kevinrob\GuzzleCache\Strategy\PrivateCacheStrategy;
13			use Psr\Http\Message\RequestInterface;
14			use Psr\Http\Message\ResponseInterface;
15
16			/**
17			* Class CacheMiddleware.
18			*/
19			class CacheMiddleware
20			{
21			const HEADER_RE_VALIDATION = 'X-Kevinrob-GuzzleCache-ReValidation';
22			const HEADER_INVALIDATION = 'X-Kevinrob-GuzzleCache-Invalidation';
23			const HEADER_CACHE_INFO = 'X-Kevinrob-Cache';
24			const HEADER_CACHE_HIT = 'HIT';
25			const HEADER_CACHE_MISS = 'MISS';
26			const HEADER_CACHE_STALE = 'STALE';
27
28			/**
29			* @var array of Promise
30			*/
31			protected $waitingRevalidate = [];
32
33			/**
34			* @var Client
35			*/
36			protected $client;
37
38			/**
39			* @var CacheStrategyInterface
40			*/
41			protected $cacheStorage;
42
43			/**
44			* List of allowed HTTP methods to cache
45			* Key = method name (upscaling)
46			* Value = true.
47			*
48			* @var array
49			*/
50			protected $httpMethods = ['GET' => true];
51
52			/**
53			* @param CacheStrategyInterface\|null $cacheStrategy
54			*/
55	44		public function __construct(CacheStrategyInterface $cacheStrategy = null)
56	1		{
57	44		$this->cacheStorage = $cacheStrategy !== null ? $cacheStrategy : new PrivateCacheStrategy();
58
59	44		register_shutdown_function([$this, 'purgeReValidation']);
60	44		}
61
62			/**
63			* @param Client $client
64			*/
65	3		public function setClient(Client $client)
66			{
67	3		$this->client = $client;
68	3		}
69
70			/**
71			* @param CacheStrategyInterface $cacheStorage
72			*/
73			public function setCacheStorage(CacheStrategyInterface $cacheStorage)
74			{
75			$this->cacheStorage = $cacheStorage;
76			}
77
78			/**
79			* @return CacheStrategyInterface
80			*/
81			public function getCacheStorage()
82			{
83			return $this->cacheStorage;
84			}
85
86			/**
87			* @param array $methods
88			*/
89			public function setHttpMethods(array $methods)
90			{
91			$this->httpMethods = $methods;
92			}
93
94			public function getHttpMethods()
95			{
96			return $this->httpMethods;
97			}
98
99			/**
100			* Will be called at the end of the script.
101			*/
102	1		public function purgeReValidation()
103			{
104	1		\GuzzleHttp\Promise\inspect_all($this->waitingRevalidate);
105	1		}
106
107			/**
108			* @param callable $handler
109			*
110			* @return callable
111			*/
112	43		public function __invoke(callable $handler)
113			{
114			return function (RequestInterface $request, array $options) use (&$handler) {
115	43		if (!isset($this->httpMethods[strtoupper($request->getMethod())])) {
116			// No caching for this method allowed
117
118	3		return $handler($request, $options)->then(
119			function (ResponseInterface $response) use ($request) {
120			// Invalidate cache after a call of non-safe method on the same URI
121	3		$response = $this->invalidateCache($request, $response);
122
123	3		return $response->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_MISS);
124			}
125	3		);
126			}
127
128	41		if ($request->hasHeader(self::HEADER_RE_VALIDATION)) {
129			// It's a re-validation request, so bypass the cache!
130	1		return $handler($request->withoutHeader(self::HEADER_RE_VALIDATION), $options);
131			}
132
133			// Retrieve information from request (Cache-Control)
134	41		$reqCacheControl = new KeyValueHttpHeader($request->getHeader('Cache-Control'));
135	41		$onlyFromCache = $reqCacheControl->has('only-if-cached');
136	41		$staleResponse = $reqCacheControl->has('max-stale')
137	41		&& $reqCacheControl->get('max-stale') === '';
138	41		$maxStaleCache = $reqCacheControl->get('max-stale', null);
139	41		$minFreshCache = $reqCacheControl->get('min-fresh', null);
140
141			// If cache => return new FulfilledPromise(...) with response
142	41		$cacheEntry = $this->cacheStorage->fetch($request);
143	41		if ($cacheEntry instanceof CacheEntry) {
144	34		$body = $cacheEntry->getResponse()->getBody();
145	34		if ($body->tell() > 0) {
146	2		$body->rewind();
147	2		}
148
149	34		if ($cacheEntry->isFresh()
150	34		&& ($minFreshCache === null \|\| $cacheEntry->getStaleAge() + (int)$minFreshCache <= 0)
151	34		) {
152			// Cache HIT!
153	28		return new FulfilledPromise(
154	28		$cacheEntry->getResponse()->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_HIT)
155	28		);
156			} elseif ($staleResponse
157	15		\|\| ($maxStaleCache !== null && $cacheEntry->getStaleAge() <= $maxStaleCache)
158	15		) {
159			// Staled cache!
160			return new FulfilledPromise(
161			$cacheEntry->getResponse()->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_HIT)
162			);
163	15		} elseif ($cacheEntry->hasValidationInformation() && !$onlyFromCache) {
164			// Re-validation header
165	4		$request = static::getRequestWithReValidationHeader($request, $cacheEntry);
166
167	4		if ($cacheEntry->staleWhileValidate()) {
168	1		static::addReValidationRequest($request, $this->cacheStorage, $cacheEntry);
169
170	1		return new FulfilledPromise(
171	1		$cacheEntry->getResponse()
172	1		->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_STALE)
173	1		);
174			}
175	3		}
176	14		} else {
177	41		$cacheEntry = null;
178			}
179
180	41		if ($cacheEntry === null && $onlyFromCache) {
181			// Explicit asking of a cached response => 504
182	1		return new FulfilledPromise(
183	1		new Response(504)
184	1		);
185			}
186
187			/** @var Promise $promise */
188	41		$promise = $handler($request, $options);
189
190	41		return $promise->then(
191			function (ResponseInterface $response) use ($request, $cacheEntry) {
192			// Check if error and looking for a staled content
193	41		if ($response->getStatusCode() >= 500) {
194	1		$responseStale = static::getStaleResponse($cacheEntry);
195	1		if ($responseStale instanceof ResponseInterface) {
196	1		return $responseStale;
197			}
198			}
199
200	41		$update = false;
201
202	41		if ($response->getStatusCode() == 304 && $cacheEntry instanceof CacheEntry) {
203			// Not modified => cache entry is re-validate
204			/** @var ResponseInterface $response */
205			$response = $response
206	2		->withStatus($cacheEntry->getResponse()->getStatusCode())
207	2		->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_HIT);
208	2		$response = $response->withBody($cacheEntry->getResponse()->getBody());
209
210			// Merge headers of the "304 Not Modified" and the cache entry
211			/**
212			* @var string $headerName
213			* @var string[] $headerValue
214			*/
215	2	View Code Duplication	foreach ($cacheEntry->getOriginalResponse()->getHeaders() as $headerName => $headerValue) {
			0 ignored issues – show Duplication introduced 2016-02-27 17:33 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
216	2		if (!$response->hasHeader($headerName) && $headerName !== self::HEADER_CACHE_INFO) {
217	2		$response = $response->withHeader($headerName, $headerValue);
218	2		}
219	2		}
220
221	2		$update = true;
222	2		} else {
223	41		$response = $response->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_MISS);
224			}
225
226	41		return static::addToCache($this->cacheStorage, $request, $response, $update);
227	41		},
228			function ($reason) use ($cacheEntry) {
229			if ($reason instanceof TransferException) {
230			$response = static::getStaleResponse($cacheEntry);
231			if ($response instanceof ResponseInterface) {
232			return $response;
233			}
234			}
235
236			return new RejectedPromise($reason);
237			}
238	41		);
239	43		};
240			}
241
242			/**
243			* @param CacheStrategyInterface $cache
244			* @param RequestInterface $request
245			* @param ResponseInterface $response
246			* @param bool $update cache
247			* @return ResponseInterface
248			*/
249	41		protected static function addToCache(
250			CacheStrategyInterface $cache,
251			RequestInterface $request,
252			ResponseInterface $response,
253			$update = false
254			) {
255			// If the body is not seekable, we have to replace it by a seekable one
256	41		if (!$response->getBody()->isSeekable()) {
257	1		$response = $response->withBody(
258	1		\GuzzleHttp\Psr7\stream_for($response->getBody()->getContents())
259	1		);
260	1		}
261
262	41		if ($update) {
263	3		$cache->update($request, $response);
264	3		} else {
265	41		$cache->cache($request, $response);
266			}
267
268	41		return $response;
269			}
270
271			/**
272			* @param RequestInterface $request
273			* @param CacheStrategyInterface $cacheStorage
274			* @param CacheEntry $cacheEntry
275			*
276			* @return bool if added
277			*/
278	1		protected function addReValidationRequest(
279			RequestInterface $request,
280			CacheStrategyInterface &$cacheStorage,
281			CacheEntry $cacheEntry
282			) {
283			// Add the promise for revalidate
284	1		if ($this->client !== null) {
285			/** @var RequestInterface $request */
286	1		$request = $request->withHeader(self::HEADER_RE_VALIDATION, '1');
287	1		$this->waitingRevalidate[] = $this->client
288	1		->sendAsync($request)
289	1		->then(function (ResponseInterface $response) use ($request, &$cacheStorage, $cacheEntry) {
290	1		$update = false;
291
292	1		if ($response->getStatusCode() == 304) {
293			// Not modified => cache entry is re-validate
294			/** @var ResponseInterface $response */
295	1		$response = $response->withStatus($cacheEntry->getResponse()->getStatusCode());
296	1		$response = $response->withBody($cacheEntry->getResponse()->getBody());
297
298			// Merge headers of the "304 Not Modified" and the cache entry
299	1	View Code Duplication	foreach ($cacheEntry->getResponse()->getHeaders() as $headerName => $headerValue) {
			0 ignored issues – show Duplication introduced 2016-02-27 17:33 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
300	1		if (!$response->hasHeader($headerName)) {
301	1		$response = $response->withHeader($headerName, $headerValue);
302	1		}
303	1		}
304
305	1		$update = true;
306	1		}
307
308	1		static::addToCache($cacheStorage, $request, $response, $update);
309	1		});
310
311	1		return true;
312			}
313
314			return false;
315			}
316
317			/**
318			* @param CacheEntry\|null $cacheEntry
319			*
320			* @return null\|ResponseInterface
321			*/
322	1		protected static function getStaleResponse(CacheEntry $cacheEntry = null)
323			{
324			// Return staled cache entry if we can
325	1		if ($cacheEntry instanceof CacheEntry && $cacheEntry->serveStaleIfError()) {
326	1		return $cacheEntry->getResponse()
327	1		->withHeader(self::HEADER_CACHE_INFO, self::HEADER_CACHE_STALE);
328			}
329
330			return;
331			}
332
333			/**
334			* @param RequestInterface $request
335			* @param CacheEntry $cacheEntry
336			*
337			* @return RequestInterface
338			*/
339	4		protected static function getRequestWithReValidationHeader(RequestInterface $request, CacheEntry $cacheEntry)
340			{
341	4		if ($cacheEntry->getResponse()->hasHeader('Last-Modified')) {
342			$request = $request->withHeader(
343			'If-Modified-Since',
344			$cacheEntry->getResponse()->getHeader('Last-Modified')
345			);
346			}
347	4		if ($cacheEntry->getResponse()->hasHeader('Etag')) {
348	4		$request = $request->withHeader(
349	4		'If-None-Match',
350	4		$cacheEntry->getResponse()->getHeader('Etag')
351	4		);
352	4		}
353
354	4		return $request;
355			}
356
357			/**
358			* @param CacheStrategyInterface\|null $cacheStorage
359			*
360			* @return CacheMiddleware the Middleware for Guzzle HandlerStack
361			*
362			* @deprecated Use constructor => `new CacheMiddleware()`
363			*/
364			public static function getMiddleware(CacheStrategyInterface $cacheStorage = null)
365			{
366			return new self($cacheStorage);
367			}
368
369			/**
370			* @param RequestInterface $request
371			*
372			* @param ResponseInterface $response
373			*
374			* @return ResponseInterface
375			*/
376	3		private function invalidateCache(RequestInterface $request, ResponseInterface $response)
377			{
378	3		$this->cacheStorage->delete($request);
379
380	3		return $response->withHeader(self::HEADER_INVALIDATION, true);
			0 ignored issues – show Documentation introduced 2019-10-21 10:18 UTC by Report Bug Copy Issue Report `true` is of type `boolean`, but the function expects a `string\|array<integer,string>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
381			}
382			}
383

Kevinrob / guzzle-cache-middleware

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