|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Cormy\Server; |
|
4
|
|
|
|
|
5
|
|
|
use Throwable; |
|
6
|
|
|
use Psr\Http\Message\ResponseInterface; |
|
7
|
|
|
use Psr\Http\Message\ServerRequestInterface; |
|
8
|
|
|
|
|
9
|
|
|
/** |
|
10
|
|
|
* Onion style PSR-7 middleware stack. |
|
11
|
|
|
*/ |
|
12
|
|
|
class Onion implements RequestHandlerInterface |
|
13
|
|
|
{ |
|
14
|
|
|
/** |
|
15
|
|
|
* @var callable|RequestHandlerInterface |
|
16
|
|
|
*/ |
|
17
|
|
|
protected $core; |
|
18
|
|
|
|
|
19
|
|
|
/** |
|
20
|
|
|
* @var callable[]|MiddlewareInterface[] |
|
21
|
|
|
*/ |
|
22
|
|
|
protected $scales; |
|
23
|
|
|
|
|
24
|
|
|
/** |
|
25
|
|
|
* Constructs an onion style PSR-7 middleware stack. |
|
26
|
|
|
* |
|
27
|
|
|
* @param callable|RequestHandlerInterface $core the innermost request handler |
|
28
|
|
|
* @param callable[]|MiddlewareInterface[] $scales the middlewares to wrap around the core |
|
29
|
|
|
*/ |
|
30
|
|
|
public function __construct(callable $core, callable ...$scales) |
|
31
|
|
|
{ |
|
32
|
|
|
$this->core = $core; |
|
33
|
|
|
$this->scales = $scales; |
|
34
|
|
|
} |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* {@inheritdoc} |
|
38
|
|
|
*/ |
|
39
|
|
|
public function __invoke(ServerRequestInterface $request):ResponseInterface |
|
40
|
|
|
{ |
|
41
|
|
|
$topIndex = count($this->scales) - 1; |
|
42
|
|
|
|
|
43
|
|
|
return $this->processMiddleware($topIndex, $request); |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
|
|
/** |
|
47
|
|
|
* Process an incoming server request by delegating it to the middleware specified by $index. |
|
48
|
|
|
* |
|
49
|
|
|
* @param int $index the $scales index |
|
50
|
|
|
* @param ServerRequestInterface $request |
|
51
|
|
|
* |
|
52
|
|
|
* @return ResponseInterface |
|
53
|
|
|
*/ |
|
54
|
|
|
protected function processMiddleware(int $index, ServerRequestInterface $request):ResponseInterface |
|
55
|
|
|
{ |
|
56
|
|
|
if ($index < 0) { |
|
57
|
|
|
return ($this->core)($request); |
|
58
|
|
|
} |
|
59
|
|
|
|
|
60
|
|
|
$current = $this->scales[$index]($request); |
|
61
|
|
|
$nextIndex = $index - 1; |
|
62
|
|
|
|
|
63
|
|
|
while ($current->valid()) { |
|
64
|
|
|
$nextRequest = $current->current(); |
|
65
|
|
|
|
|
66
|
|
|
try { |
|
67
|
|
|
$nextResponse = $this->processMiddleware($nextIndex, $nextRequest); |
|
68
|
|
|
$current->send($nextResponse); |
|
69
|
|
|
} catch (Throwable $exception) { |
|
|
|
|
|
|
70
|
|
|
$current->throw($exception); |
|
71
|
|
|
} |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
return $current->getReturn(); |
|
75
|
|
|
} |
|
76
|
|
|
} |
|
77
|
|
|
|
cormy /
onion
Loading history...