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# Stack/Cors
Library and middleware enabling cross-origin resource sharing for your
http-{foundation,kernel} using application. It attempts to implement the
[W3C Candidate Recommendation] for cross-origin resource sharing.
[W3C Candidate Recommendation]: http://www.w3.org/TR/cors/
Master [](http://travis-ci.org/asm89/stack-cors)
Develop [](http://travis-ci.org/asm89/stack-cors)
## Installation
Require `asm89/stack-cors` using composer.
## Usage
Stack middleware:
```php
<?php
use Asm89\Stack\Cors;
$app = new Cors($app, array(
// you can use array('*') to allow any headers
'allowedHeaders' => array('x-allowed-header', 'x-other-allowed-header'),
// you can use array('*') to allow any methods
'allowedMethods' => array('DELETE', 'GET', 'POST', 'PUT'),
// you can use array('*') to allow requests from any origin
'allowedOrigins' => array('localhost'),
'exposedHeaders' => false,
'maxAge' => false,
'supportsCredentials' => false,
));
```
Or use the library:
```php
<?php
use Asm89\Stack\CorsService;
$cors = new CorsService(array(
'allowedHeaders' => array('x-allowed-header', 'x-other-allowed-header'),
'allowedMethods' => array('DELETE', 'GET', 'POST', 'PUT'),
'allowedOrigins' => array('localhost'),
'exposedHeaders' => false,
'maxAge' => false,
'supportsCredentials' => false,
));
$cors->addActualRequestHeaders(Response $response, $origin);
$cors->handlePreflightRequest(Request $request);
$cors->isActualRequestAllowed(Request $request);
$cors->isCorsRequest(Request $request);
$cors->isPreflightRequest(Request $request);
```