Stack/Cors
Library and middleware enabling cross-origin resource sharing for your http-{foundation,kernel} using application. It attempts to implement the W3C Recommendation for cross-origin resource sharing.
Build status: 
Installation
Require asm89/stack-cors using composer.
Usage
This package can be used as a library or as stack middleware.
Options
| Option | Description | Default value |
|---|---|---|
allowedMethods |
Matches the request method. | [] |
allowedOrigins |
Matches the request origin. | [] |
allowedOriginsPatterns |
Matches the request origin with preg_match. |
[] |
allowedHeaders |
Sets the Access-Control-Allow-Headers response header. | [] |
exposedHeaders |
Sets the Access-Control-Expose-Headers response header. | false |
maxAge |
Sets the Access-Control-Max-Age response header. Set to null to omit the header/use browser default. |
0 |
supportsCredentials |
Sets the Access-Control-Allow-Credentials header. | false |
The allowedMethods and allowedHeaders options are case-insensitive.
You don't need to provide both allowedOrigins and allowedOriginsPatterns. If one of the strings passed matches, it is considered a valid origin.
If ['*'] is provided to allowedMethods, allowedOrigins or allowedHeaders all methods / origins / headers are allowed.
If supportsCredentials is true, you must explicitly set allowedHeaders for any headers which are not CORS safelisted.
Example: using the library
<?php
use Asm89\Stack\CorsService;
$cors = new CorsService([
'allowedHeaders' => ['x-allowed-header', 'x-other-allowed-header'],
'allowedMethods' => ['DELETE', 'GET', 'POST', 'PUT'],
'allowedOrigins' => ['http://localhost'],
'allowedOriginsPatterns' => ['/localhost:\d/'],
'exposedHeaders' => false,
'maxAge' => 600,
'supportsCredentials' => true,
]);
$cors->addActualRequestHeaders(Response $response, $origin);
$cors->handlePreflightRequest(Request $request);
$cors->isActualRequestAllowed(Request $request);
$cors->isCorsRequest(Request $request);
$cors->isPreflightRequest(Request $request);Example: using the stack middleware
<?php
use Asm89\Stack\Cors;
$app = new Cors($app, [
// you can use ['*'] to allow any headers
'allowedHeaders' => ['x-allowed-header', 'x-other-allowed-header'],
// you can use ['*'] to allow any methods
'allowedMethods' => ['DELETE', 'GET', 'POST', 'PUT'],
// you can use ['*'] to allow requests from any origin
'allowedOrigins' => ['localhost'],
// you can enter regexes that are matched to the origin request header
'allowedOriginsPatterns' => ['/localhost:\d/'],
'exposedHeaders' => false,
'maxAge' => 600,
'supportsCredentials' => false,
]);