|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* @copyright Copyright (c) Flipbox Digital Limited |
|
5
|
|
|
* @license https://github.com/flipbox/cache/blob/master/LICENSE |
|
6
|
|
|
* @link https://github.com/flipbox/cache |
|
7
|
|
|
*/ |
|
8
|
|
|
|
|
9
|
|
|
namespace Flipbox\Cache\Middleware; |
|
10
|
|
|
|
|
11
|
|
|
use Flipbox\Cache\Exceptions\InvalidCachePoolException; |
|
12
|
|
|
use Flipbox\Http\Stream\Factory as StreamFactory; |
|
13
|
|
|
use Flipbox\Relay\Middleware\AbstractMiddleware; |
|
14
|
|
|
use Psr\Cache\CacheItemPoolInterface; |
|
15
|
|
|
use Psr\Http\Message\RequestInterface; |
|
16
|
|
|
use Psr\Http\Message\ResponseInterface; |
|
17
|
|
|
use Stash\Interfaces\ItemInterface; |
|
18
|
|
|
|
|
19
|
|
|
/** |
|
20
|
|
|
* @author Flipbox Factory <[email protected]> |
|
21
|
|
|
* @since 2.0.0 |
|
22
|
|
|
*/ |
|
23
|
|
|
class Cache extends AbstractMiddleware |
|
24
|
|
|
{ |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @var CacheItemPoolInterface The connection |
|
28
|
|
|
*/ |
|
29
|
|
|
public $pool; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* @inheritdoc |
|
33
|
|
|
*/ |
|
34
|
|
|
public function init() |
|
35
|
|
|
{ |
|
36
|
|
|
// Parent |
|
37
|
|
|
parent::init(); |
|
38
|
|
|
|
|
39
|
|
|
// Ensure we have a valid pool |
|
40
|
|
|
if (!$this->pool instanceof CacheItemPoolInterface) { |
|
41
|
|
|
throw new InvalidCachePoolException( |
|
42
|
|
|
sprintf( |
|
43
|
|
|
"The class '%s' requires a cache pool that is an instance of '%s'", |
|
44
|
|
|
get_class($this), |
|
45
|
|
|
'Psr\Cache\CacheItemPoolInterface' |
|
46
|
|
|
) |
|
47
|
|
|
); |
|
48
|
|
|
} |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
/** |
|
52
|
|
|
* @inheritdoc |
|
53
|
|
|
*/ |
|
54
|
|
|
public function __invoke( |
|
55
|
|
|
RequestInterface $request, |
|
56
|
|
|
ResponseInterface $response, |
|
57
|
|
|
callable $next = null |
|
58
|
|
|
): ResponseInterface { |
|
59
|
|
|
// Do parent (logging) |
|
60
|
|
|
parent::__invoke($request, $response); |
|
61
|
|
|
|
|
62
|
|
|
// Create a cache key |
|
63
|
|
|
$key = $this->getCacheKey($request); |
|
64
|
|
|
|
|
65
|
|
|
/** @var ItemInterface $item */ |
|
66
|
|
|
$item = $this->pool->getItem($key); |
|
67
|
|
|
|
|
68
|
|
|
// If it's cached |
|
69
|
|
|
if ($item->isHit()) { |
|
70
|
|
|
$this->info( |
|
71
|
|
|
"Item found in Cache", |
|
72
|
|
|
[ |
|
73
|
|
|
'key' => $key, |
|
74
|
|
|
'expires' => $item->getExpiration() |
|
75
|
|
|
] |
|
76
|
|
|
); |
|
77
|
|
|
|
|
78
|
|
|
// Add response body |
|
79
|
|
|
$response = $response->withBody( |
|
80
|
|
|
StreamFactory::create($item->get()) |
|
81
|
|
|
); |
|
82
|
|
|
|
|
83
|
|
|
return $response; |
|
84
|
|
|
} else { |
|
85
|
|
|
$this->info( |
|
86
|
|
|
"Item not found in Cache", |
|
87
|
|
|
[ |
|
88
|
|
|
'key' => $key |
|
89
|
|
|
] |
|
90
|
|
|
); |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
|
|
// Lock item |
|
94
|
|
|
$item->lock(); |
|
95
|
|
|
|
|
96
|
|
|
/** @var ResponseInterface $response */ |
|
97
|
|
|
$response = $next($request, $response); |
|
98
|
|
|
|
|
99
|
|
|
// Only cache successful responses |
|
100
|
|
|
if ($this->isResponseSuccessful($response)) { |
|
101
|
|
|
// Set cache contents |
|
102
|
|
|
$item->set($response->getBody()->getContents()); |
|
103
|
|
|
|
|
104
|
|
|
// Save cache item |
|
105
|
|
|
$this->pool->save($item); |
|
106
|
|
|
|
|
107
|
|
|
$this->info( |
|
108
|
|
|
"Save item to Cache", |
|
109
|
|
|
[ |
|
110
|
|
|
'key' => $key, |
|
111
|
|
|
'expires' => $item->getExpiration() |
|
112
|
|
|
] |
|
113
|
|
|
); |
|
114
|
|
|
} else { |
|
115
|
|
|
$this->info( |
|
116
|
|
|
"Did not save to cache because request was unsuccessful.", |
|
117
|
|
|
[ |
|
118
|
|
|
'key' => $key, |
|
119
|
|
|
'statusCode' => $response->getStatusCode() |
|
120
|
|
|
] |
|
121
|
|
|
); |
|
122
|
|
|
} |
|
123
|
|
|
|
|
124
|
|
|
return $response; |
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
/** |
|
128
|
|
|
* Returns the id used to cache a request. |
|
129
|
|
|
* |
|
130
|
|
|
* @param RequestInterface $request |
|
131
|
|
|
* |
|
132
|
|
|
* @return string |
|
133
|
|
|
*/ |
|
134
|
|
|
private function getCacheKey(RequestInterface $request): string |
|
135
|
|
|
{ |
|
136
|
|
|
return $request->getMethod() . md5((string)$request->getUri()); |
|
137
|
|
|
} |
|
138
|
|
|
} |
|
139
|
|
|
|
flipbox /
cache
