|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace JDesrosiers\Silex\Provider; |
|
4
|
|
|
|
|
5
|
|
|
use Silex\Application; |
|
6
|
|
|
use Symfony\Component\HttpFoundation\Request; |
|
7
|
|
|
use Symfony\Component\HttpFoundation\Response; |
|
8
|
|
|
|
|
9
|
|
|
class Cors |
|
10
|
|
|
{ |
|
11
|
|
|
private $options; |
|
12
|
|
|
|
|
13
|
38 |
|
public function __construct($options = []) |
|
14
|
|
|
{ |
|
15
|
38 |
|
$this->options = $options; |
|
16
|
38 |
|
} |
|
17
|
|
|
|
|
18
|
34 |
|
public function __invoke(Request $request, Response $response, Application $app) |
|
19
|
|
|
{ |
|
20
|
|
|
$defaults = [ |
|
21
|
34 |
|
"allowOrigin" => $app["cors.allowOrigin"], |
|
22
|
34 |
|
"allowMethods" => $app["cors.allowMethods"], |
|
23
|
34 |
|
"allowHeaders" => $app["cors.allowHeaders"], |
|
24
|
34 |
|
"maxAge" => $app["cors.maxAge"], |
|
25
|
34 |
|
"allowCredentials" => $app["cors.allowCredentials"], |
|
26
|
34 |
|
"exposeHeaders" => $app["cors.exposeHeaders"] |
|
27
|
34 |
|
]; |
|
28
|
34 |
|
$this->cors($request, $response, $this->options + $defaults); |
|
29
|
34 |
|
} |
|
30
|
|
|
|
|
31
|
34 |
|
private function cors(Request $request, Response $response, $options) |
|
32
|
|
|
{ |
|
33
|
34 |
|
$headers = []; |
|
34
|
|
|
|
|
35
|
34 |
|
if (!$this->isCorsRequest($request)) { |
|
36
|
2 |
|
return []; |
|
37
|
|
|
} |
|
38
|
|
|
|
|
39
|
32 |
|
if ($this->isPreflightRequest($request)) { |
|
40
|
16 |
|
$requestMethod = $request->headers->get("Access-Control-Request-Method"); |
|
41
|
16 |
|
$allow = $response->headers->get("Allow"); |
|
42
|
16 |
|
if (!$this->isMethodAllowed($requestMethod, $allow, $options["allowMethods"])) { |
|
43
|
2 |
|
return []; |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
14 |
|
$requestHeaders = $request->headers->get("Access-Control-Request-Headers"); |
|
47
|
14 |
|
if (!$this->areHeadersAllowed($requestHeaders, $options["allowHeaders"])) { |
|
48
|
1 |
|
return []; |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
13 |
|
$headers["Access-Control-Allow-Headers"] = $requestHeaders; |
|
52
|
13 |
|
$headers["Access-Control-Allow-Methods"] = $requestMethod; |
|
53
|
13 |
|
$headers["Access-Control-Max-Age"] = $options["maxAge"]; |
|
54
|
13 |
|
} else { |
|
55
|
16 |
|
$headers["Access-Control-Expose-Headers"] = $options["exposeHeaders"]; |
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
29 |
|
$allowOrigin = $this->allowOrigin($request, $options["allowOrigin"]); |
|
59
|
|
|
|
|
60
|
29 |
|
if (!$allowOrigin) { |
|
61
|
9 |
|
return []; |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
20 |
|
$headers["Access-Control-Allow-Origin"] = $allowOrigin; |
|
65
|
20 |
|
$headers["Access-Control-Allow-Credentials"] = $this->allowCredentials($options["allowCredentials"]); |
|
66
|
|
|
|
|
67
|
20 |
|
$response->headers->add(array_filter($headers)); |
|
68
|
20 |
|
} |
|
69
|
|
|
|
|
70
|
34 |
|
private function isCorsRequest(Request $request) |
|
71
|
|
|
{ |
|
72
|
34 |
|
return $request->headers->has("Origin"); |
|
73
|
|
|
} |
|
74
|
|
|
|
|
75
|
32 |
|
private function isPreflightRequest(Request $request) |
|
76
|
|
|
{ |
|
77
|
32 |
|
return $request->getMethod() === "OPTIONS" && $request->headers->has("Access-Control-Request-Method"); |
|
78
|
|
|
} |
|
79
|
|
|
|
|
80
|
16 |
|
private function isMethodAllowed($requestMethod, $allow, $allowMethods) |
|
81
|
|
|
{ |
|
82
|
16 |
|
$commaSeparatedMethods = !is_null($allowMethods) ? $allowMethods : $allow; |
|
83
|
16 |
|
$allowedMethods = array_filter(preg_split("/\s*,\s*/", $commaSeparatedMethods)); |
|
84
|
16 |
|
return in_array($requestMethod, $allowedMethods); |
|
85
|
|
|
} |
|
86
|
|
|
|
|
87
|
14 |
|
private function areHeadersAllowed($commaSeparatedRequestHeaders, $allowHeaders) |
|
88
|
|
|
{ |
|
89
|
14 |
|
if ($allowHeaders === null) { |
|
90
|
13 |
|
return true; |
|
91
|
|
|
} |
|
92
|
1 |
|
$requestHeaders = array_filter(preg_split("/\s*,\s*/", $commaSeparatedRequestHeaders)); |
|
93
|
1 |
|
$allowedHeaders = array_filter(preg_split("/\s*,\s*/", $allowHeaders)); |
|
94
|
1 |
|
return array_diff($requestHeaders, $allowedHeaders) === []; |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
29 |
|
private function allowOrigin(Request $request, $allowOrigin) |
|
98
|
|
|
{ |
|
99
|
29 |
|
$origin = $request->headers->get("Origin"); |
|
100
|
29 |
|
if ($allowOrigin === "*") { |
|
101
|
14 |
|
$allowOrigin = $origin; |
|
102
|
14 |
|
} |
|
103
|
|
|
|
|
104
|
29 |
|
$origins = array_filter(preg_split('/\s+/', $allowOrigin)); |
|
105
|
29 |
|
foreach ($origins as $domain) { |
|
106
|
29 |
|
if (preg_match($this->domainToRegex($domain), $origin)) { |
|
107
|
20 |
|
return $origin; |
|
108
|
|
|
} |
|
109
|
10 |
|
} |
|
110
|
|
|
|
|
111
|
9 |
|
return false; |
|
112
|
|
|
} |
|
113
|
|
|
|
|
114
|
29 |
|
private function domainToRegex($domain) |
|
115
|
|
|
{ |
|
116
|
29 |
|
$star = $this->doubleQuote("*"); |
|
117
|
29 |
|
$slash = $this->doubleQuote("/"); |
|
118
|
29 |
|
$dot = $this->doubleQuote("."); |
|
119
|
29 |
|
$wildcard = "/(?<=^|$slash)$star(?=$dot)/"; |
|
120
|
29 |
|
$subdomain = "[^.]+"; |
|
121
|
29 |
|
$quotedDomain = preg_quote($domain, "/"); |
|
122
|
29 |
|
return "/^" . preg_replace($wildcard, $subdomain, $quotedDomain) . "$/"; |
|
123
|
|
|
} |
|
124
|
|
|
|
|
125
|
29 |
|
private function doubleQuote($subject) |
|
126
|
|
|
{ |
|
127
|
29 |
|
return preg_quote(preg_quote($subject, "/"), "/"); |
|
128
|
|
|
} |
|
129
|
|
|
|
|
130
|
20 |
|
private function allowCredentials($allowCredentials) |
|
131
|
|
|
{ |
|
132
|
20 |
|
return $allowCredentials === true ? "true" : null; |
|
133
|
|
|
} |
|
134
|
|
|
} |
|
135
|
|
|
|
jdesrosiers /
silex-cors-provider
