|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Psr7Middlewares\Middleware; |
|
4
|
|
|
|
|
5
|
|
|
use Psr7Middlewares\Utils; |
|
6
|
|
|
use Psr7Middlewares\Middleware; |
|
7
|
|
|
use Psr\Http\Message\ServerRequestInterface; |
|
8
|
|
|
use Psr\Http\Message\ResponseInterface; |
|
9
|
|
|
use Psr\Http\Message\StreamInterface; |
|
10
|
|
|
|
|
11
|
|
|
/** |
|
12
|
|
|
* Middleware to read the response. |
|
13
|
|
|
*/ |
|
14
|
|
|
class ReadResponse |
|
15
|
|
|
{ |
|
16
|
|
|
use Utils\FileTrait; |
|
17
|
|
|
|
|
18
|
|
|
/** |
|
19
|
|
|
* Execute the middleware. |
|
20
|
|
|
* |
|
21
|
|
|
* @param ServerRequestInterface $request |
|
22
|
|
|
* @param ResponseInterface $response |
|
23
|
|
|
* @param callable $next |
|
24
|
|
|
* |
|
25
|
|
|
* @return ResponseInterface |
|
26
|
|
|
*/ |
|
27
|
|
|
public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next) |
|
28
|
|
|
{ |
|
29
|
|
|
//If basePath does not match |
|
30
|
|
|
if (!$this->testBasePath($request->getUri()->getPath())) { |
|
31
|
|
|
return $next($request, $response); |
|
32
|
|
|
} |
|
33
|
|
|
|
|
34
|
|
|
//If the method is not allowed |
|
35
|
|
|
if ($request->getMethod() !== 'GET') { |
|
36
|
|
|
return $response->withStatus(405); |
|
37
|
|
|
} |
|
38
|
|
|
|
|
39
|
|
|
$body = Middleware::createStream(); |
|
40
|
|
|
|
|
41
|
|
|
$file = $this->getFilename($request); |
|
42
|
|
|
|
|
43
|
|
|
//If the file does not exists, check if is gzipped |
|
44
|
|
|
if (!is_file($file)) { |
|
45
|
|
|
$file .= '.gz'; |
|
46
|
|
|
|
|
47
|
|
|
if (EncodingNegotiator::getEncoding($request) !== 'gzip' || !is_file($file)) { |
|
48
|
|
|
return $response->withStatus(404); |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
$response = $response->withHeader('Content-Encoding', 'gzip'); |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
|
|
self::readFile($file, $body); |
|
55
|
|
|
|
|
56
|
|
|
$response = $response->withBody($body); |
|
57
|
|
|
|
|
58
|
|
|
//Handle range header |
|
59
|
|
|
$response = $this->range($request, $response); |
|
60
|
|
|
|
|
61
|
|
|
return $next($request, $response); |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
/** |
|
65
|
|
|
* Reads a file and write in the body. |
|
66
|
|
|
* |
|
67
|
|
|
* @param string $file |
|
68
|
|
|
* @param StreamInterface $body |
|
69
|
|
|
*/ |
|
70
|
|
|
private static function readFile($file, StreamInterface $body) |
|
71
|
|
|
{ |
|
72
|
|
|
if (filesize($file) <= 4096) { |
|
73
|
|
|
$body->write(file_get_contents($file)); |
|
74
|
|
|
|
|
75
|
|
|
return; |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
$stream = fopen($file, 'r'); |
|
79
|
|
|
|
|
80
|
|
|
while (!feof($stream)) { |
|
81
|
|
|
$body->write(fread($stream, 4096)); |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
fclose($stream); |
|
85
|
|
|
} |
|
86
|
|
|
|
|
87
|
|
|
/** |
|
88
|
|
|
* Handle range requests. |
|
89
|
|
|
* |
|
90
|
|
|
* @param ServerRequestInterface $request |
|
91
|
|
|
* @param ResponseInterface $response |
|
92
|
|
|
* |
|
93
|
|
|
* @return ResponseInterface |
|
94
|
|
|
*/ |
|
95
|
|
|
private static function range(ServerRequestInterface $request, ResponseInterface $response) |
|
96
|
|
|
{ |
|
97
|
|
|
$response = $response->withHeader('Accept-Ranges', 'bytes'); |
|
98
|
|
|
|
|
99
|
|
|
$range = $request->getHeaderLine('Range'); |
|
100
|
|
|
|
|
101
|
|
|
if (empty($range) || !($range = self::parseRangeHeader($range))) { |
|
102
|
|
|
return $response; |
|
103
|
|
|
} |
|
104
|
|
|
|
|
105
|
|
|
list($first, $last) = $range; |
|
106
|
|
|
$size = $response->getBody()->getSize(); |
|
107
|
|
|
|
|
108
|
|
|
if ($last === null) { |
|
109
|
|
|
$last = $size - 1; |
|
110
|
|
|
} |
|
111
|
|
|
|
|
112
|
|
|
return $response |
|
113
|
|
|
->withStatus(206) |
|
114
|
|
|
->withHeader('Content-Length', (string) ($last - $first + 1)) |
|
115
|
|
|
->withHeader('Content-Range', sprintf('bytes %d-%d/%d', $first, $last, $size)); |
|
116
|
|
|
} |
|
117
|
|
|
|
|
118
|
|
|
/** |
|
119
|
|
|
* Parses a range header, for example: bytes=500-999. |
|
120
|
|
|
* |
|
121
|
|
|
* @param string $header |
|
122
|
|
|
* |
|
123
|
|
|
* @return false|array [first, last] |
|
124
|
|
|
*/ |
|
125
|
|
|
private static function parseRangeHeader($header) |
|
126
|
|
|
{ |
|
127
|
|
|
if (preg_match('/bytes=(?P<first>\d+)-(?P<last>\d+)?/', $header, $matches)) { |
|
128
|
|
|
return [ |
|
129
|
|
|
(int) $matches['first'], |
|
130
|
|
|
isset($matches['last']) ? (int) $matches['last'] : null, |
|
131
|
|
|
]; |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
|
|
return false; |
|
135
|
|
|
} |
|
136
|
|
|
} |
|
137
|
|
|
|
oscarotero /
psr7-middlewares
