authorizer / vendor / google / auth / src / CacheTrait.php

CacheTrait.php in Authorizer 3.14.2, at vendor/google/auth/src/CacheTrait.php

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1	<?php
2	/*
3	* Copyright 2015 Google Inc.
4	*
5	* Licensed under the Apache License, Version 2.0 (the "License");
6	* you may not use this file except in compliance with the License.
7	* You may obtain a copy of the License at
8	*
9	* http://www.apache.org/licenses/LICENSE-2.0
10	*
11	* Unless required by applicable law or agreed to in writing, software
12	* distributed under the License is distributed on an "AS IS" BASIS,
13	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14	* See the License for the specific language governing permissions and
15	* limitations under the License.
16	*/
17
18	namespace Google\Auth;
19
20	use Psr\Cache\CacheItemPoolInterface;
21
22	trait CacheTrait
23	{
24	/**
25	* @var int
26	*/
27	private $maxKeyLength = 64;
28
29	/**
30	* @var array<mixed>
31	*/
32	private $cacheConfig;
33
34	/**
35	* @var ?CacheItemPoolInterface
36	*/
37	private $cache;
38
39	/**
40	* Gets the cached value if it is present in the cache when that is
41	* available.
42	*
43	* @param mixed $k
44	*
45	* @return mixed
46	*/
47	private function getCachedValue($k)
48	{
49	if (is_null($this->cache)) {
50	return null;
51	}
52
53	$key = $this->getFullCacheKey($k);
54	if (is_null($key)) {
55	return null;
56	}
57
58	$cacheItem = $this->cache->getItem($key);
59	if ($cacheItem->isHit()) {
60	return $cacheItem->get();
61	}
62	}
63
64	/**
65	* Saves the value in the cache when that is available.
66	*
67	* @param mixed $k
68	* @param mixed $v
69	* @return mixed
70	*/
71	private function setCachedValue($k, $v)
72	{
73	if (is_null($this->cache)) {
74	return null;
75	}
76
77	$key = $this->getFullCacheKey($k);
78	if (is_null($key)) {
79	return null;
80	}
81
82	$cacheItem = $this->cache->getItem($key);
83	$cacheItem->set($v);
84	$cacheItem->expiresAfter($this->cacheConfig['lifetime']);
85	return $this->cache->save($cacheItem);
86	}
87
88	/**
89	* @param null\|string $key
90	* @return null\|string
91	*/
92	private function getFullCacheKey($key)
93	{
94	if (is_null($key)) {
95	return null;
96	}
97
98	$key = ($this->cacheConfig['prefix'] ?? '') . $key;
99
100	// ensure we do not have illegal characters
101	$key = preg_replace('\|[^a-zA-Z0-9_\.!]\|', '', $key);
102
103	// Hash keys if they exceed $maxKeyLength (defaults to 64)
104	if ($this->maxKeyLength && strlen($key) > $this->maxKeyLength) {
105	$key = substr(hash('sha256', $key), 0, $this->maxKeyLength);
106	}
107
108	return $key;
109	}
110	}
111