|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* This file is part of slick/http |
|
5
|
|
|
* |
|
6
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
7
|
|
|
* file that was distributed with this source code. |
|
8
|
|
|
*/ |
|
9
|
|
|
|
|
10
|
|
|
namespace Slick\Http\Server; |
|
11
|
|
|
|
|
12
|
|
|
use Interop\Http\Server\MiddlewareInterface; |
|
13
|
|
|
use Psr\Http\Message\ResponseInterface; |
|
14
|
|
|
use Psr\Http\Message\ServerRequestInterface; |
|
15
|
|
|
use Slick\Http\Server\Exception\InvalidArgumentException; |
|
16
|
|
|
use Slick\Http\Server\Exception\UnexpectedValueException; |
|
17
|
|
|
use Slick\Http\Server\Middleware\CallableMiddleware; |
|
18
|
|
|
|
|
19
|
|
|
/** |
|
20
|
|
|
* MiddlewareStack |
|
21
|
|
|
* |
|
22
|
|
|
* @package Slick\Http\Server |
|
23
|
|
|
*/ |
|
24
|
|
|
class MiddlewareStack |
|
25
|
|
|
{ |
|
26
|
|
|
/** |
|
27
|
|
|
* @var array|MiddlewareInterface[] |
|
28
|
|
|
*/ |
|
29
|
|
|
private $middlewareStack = []; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* Creates a Middleware Stack |
|
33
|
|
|
* |
|
34
|
|
|
* @param MiddlewareInterface[]|callable[] $middlewareStack |
|
35
|
|
|
*/ |
|
36
|
|
|
public function __construct(array $middlewareStack) |
|
37
|
|
|
{ |
|
38
|
|
|
foreach ($middlewareStack as $middleware) { |
|
39
|
|
|
$this->push($middleware); |
|
40
|
|
|
} |
|
41
|
|
|
} |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* Pushes a middleware to the stack |
|
45
|
|
|
* |
|
46
|
|
|
* @param MiddlewareInterface|callable $middleware |
|
47
|
|
|
* |
|
48
|
|
|
* @return MiddlewareStack |
|
49
|
|
|
*/ |
|
50
|
|
|
public function push($middleware) |
|
51
|
|
|
{ |
|
52
|
|
|
if ( |
|
53
|
|
|
! $middleware instanceof MiddlewareInterface && |
|
54
|
|
|
! is_callable($middleware) |
|
55
|
|
|
) { |
|
56
|
|
|
throw new InvalidArgumentException( |
|
57
|
|
|
"Middleware stack accepts only MiddlewareInterface object or callable" |
|
58
|
|
|
); |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
array_push($this->middlewareStack, $middleware); |
|
62
|
|
|
return $this; |
|
63
|
|
|
} |
|
64
|
|
|
|
|
65
|
|
|
/** |
|
66
|
|
|
* Processes all the middleware stack |
|
67
|
|
|
* |
|
68
|
|
|
* @param ServerRequestInterface $request |
|
69
|
|
|
* |
|
70
|
|
|
* @return \Psr\Http\Message\ResponseInterface |
|
71
|
|
|
*/ |
|
72
|
|
|
public function process(ServerRequestInterface $request) |
|
73
|
|
|
{ |
|
74
|
|
|
$handler = $this->resolve(0); |
|
75
|
|
|
return $handler->handle($request); |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
/** |
|
79
|
|
|
* Creates a request handler for middleware at the position defined by $index |
|
80
|
|
|
* |
|
81
|
|
|
* @param int $index |
|
82
|
|
|
* |
|
83
|
|
|
* @return RequestHandler |
|
84
|
|
|
* |
|
85
|
|
|
* @throws UnexpectedValueException If the return form a middleware is not a ResponseInterface |
|
86
|
|
|
*/ |
|
87
|
|
|
private function resolve($index) |
|
88
|
|
|
{ |
|
89
|
|
|
return new RequestHandler(function(ServerRequestInterface $request) use ($index) { |
|
90
|
|
|
|
|
91
|
|
|
$middleware = isset($this->middlewareStack[$index]) |
|
92
|
|
|
? $this->middlewareStack[$index] |
|
93
|
|
|
: new CallableMiddleware(function () {}); |
|
94
|
|
|
|
|
95
|
|
|
if ($middleware instanceof \Closure) { |
|
96
|
|
|
$middleware = new CallableMiddleware($middleware); |
|
97
|
|
|
} |
|
98
|
|
|
|
|
99
|
|
|
$response = $middleware->process($request, $this->resolve($index + 1)); |
|
100
|
|
|
|
|
101
|
|
|
if (!($response instanceof ResponseInterface)) { |
|
102
|
|
|
throw new UnexpectedValueException( |
|
103
|
|
|
sprintf('The middleware must return an instance of %s', ResponseInterface::class) |
|
104
|
|
|
); |
|
105
|
|
|
} |
|
106
|
|
|
|
|
107
|
|
|
return $response; |
|
108
|
|
|
}); |
|
109
|
|
|
|
|
110
|
|
|
} |
|
111
|
|
|
} |
slickframework /
http
