|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* slince middleware library |
|
4
|
|
|
* @author Tao <[email protected]> |
|
5
|
|
|
*/ |
|
6
|
|
|
namespace Slince\Middleware; |
|
7
|
|
|
|
|
8
|
|
|
use Interop\Http\ServerMiddleware\MiddlewareInterface; |
|
9
|
|
|
use Psr\Http\Message\ServerRequestInterface; |
|
10
|
|
|
use Psr\Http\Message\ResponseInterface; |
|
11
|
|
|
use Slince\Middleware\Exception\MissingResponseException; |
|
12
|
|
|
|
|
13
|
|
|
class MiddlewareQueue |
|
14
|
|
|
{ |
|
15
|
|
|
/** |
|
16
|
|
|
* @var \SplQueue |
|
17
|
|
|
*/ |
|
18
|
|
|
public $middlewares; |
|
19
|
|
|
|
|
20
|
|
|
public function __construct($middlewares = []) |
|
21
|
|
|
{ |
|
22
|
|
|
$this->middlewares = new \SplQueue(); |
|
23
|
|
|
foreach ((array)$middlewares as $middleware) { |
|
24
|
|
|
$this->push($middleware); |
|
25
|
|
|
} |
|
26
|
|
|
} |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* Add a middleware to the queue |
|
30
|
|
|
* @param callable|MiddlewareInterface $middleware |
|
31
|
|
|
*/ |
|
32
|
|
|
public function push($middleware) |
|
33
|
|
|
{ |
|
34
|
|
|
if (is_callable($middleware)) { |
|
35
|
|
|
$middleware = static::decorateCallableMiddleware($middleware); |
|
36
|
|
|
} |
|
37
|
|
|
$this->middlewares->enqueue($middleware); |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
|
|
/** |
|
41
|
|
|
* Get all middlewares |
|
42
|
|
|
* @return MiddlewareInterface[] |
|
43
|
|
|
*/ |
|
44
|
|
|
public function all() |
|
45
|
|
|
{ |
|
46
|
|
|
$middlewares = []; |
|
47
|
|
|
foreach ($this->middlewares as $middleware) { |
|
48
|
|
|
$middlewares[] = $middleware; |
|
49
|
|
|
} |
|
50
|
|
|
return $middlewares; |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* Dispatch the request to the middlewares and get psr7 response |
|
55
|
|
|
* @param ServerRequestInterface $request |
|
56
|
|
|
* @throws MissingResponseException |
|
57
|
|
|
* @return ResponseInterface |
|
58
|
|
|
*/ |
|
59
|
|
|
public function process(ServerRequestInterface $request) |
|
60
|
|
|
{ |
|
61
|
|
|
$response = $this->generateDelegate()->process($request); |
|
62
|
|
|
if (!$response instanceof ResponseInterface) { |
|
63
|
|
|
throw new MissingResponseException('Last middleware executed did not return a response.'); |
|
64
|
|
|
} |
|
65
|
|
|
return $response; |
|
66
|
|
|
} |
|
67
|
|
|
|
|
68
|
|
|
/** |
|
69
|
|
|
* @return Delegate |
|
70
|
|
|
*/ |
|
71
|
|
|
protected function generateDelegate() |
|
72
|
|
|
{ |
|
73
|
|
|
return new Delegate($this->middlewares->dequeue(), $this->middlewares->isEmpty() |
|
74
|
|
|
? new FinalDelegate() : $this->generateDelegate()); |
|
75
|
|
|
} |
|
76
|
|
|
|
|
77
|
|
|
protected static function decorateCallableMiddleware(callable $middleware) |
|
78
|
|
|
{ |
|
79
|
|
|
return new CallableMiddleware($middleware); |
|
80
|
|
|
} |
|
81
|
|
|
} |
slince /
middleware
