CORS Middleware for Laravel

Based on https://github.com/asm89/stack-cors

About

The laravel-cors package allows you to send Cross-Origin Resource Sharing headers with Laravel middleware configuration.

If you want to have have a global overview of CORS workflow, you can browse this image.

Upgrading from 0.x

When upgrading from 0.x versions, there are some breaking changes:

The vendor name has changed (see installation/usage)
Group middleware is no longer supported.
A new 'paths' property is used to enable/disable CORS on certain routes. This is empty by default!

Features

Handles CORS pre-flight OPTIONS requests
Adds CORS headers to your responses
Match routes to only add CORS to certain Requests

Installation

Require the fruitcake/laravel-cors package in your composer.json and update your dependencies:

composer require fruitcake/laravel-cors

Global usage

To allow CORS for all your routes, add the HandleCors middleware in the $middleware property of app/Http/Kernel.php class:

protected $middleware = [
    // ...
    \Fruitcake\Cors\HandleCors::class,
];

Now update the config to define the paths you want to run the CORS service on, (see Configuration below):

'paths' => ['api/*'],

Configuration

The defaults are set in config/cors.php. Publish the config to copy the file to your own config:

php artisan vendor:publish --tag="cors"

Note: When using custom headers, like X-Auth-Token or X-Requested-With, you must set the allowed_headers to include those headers. You can also set it to ['*'] to allow all custom headers.

Note: If you are explicitly whitelisting headers, you must include Origin or requests will fail to be recognized as CORS.

<?php

return [

    /*
     * You can enable CORS for 1 or multiple paths.
     * Example: ['api/*']
     */
    'paths' => [],

    /*
    * Matches the request method. `[*]` allows all methods.
    */
    'allowed_methods' => ['*'],

    /*
     * Matches the request origin. `[*]` allows all origins.
     */
    'allowed_origins' => ['*'],

    /*
     * Matches the request origin with, similar to `Request::is()`
     */
    'allowed_origins_patterns' => [],

    /*
     * Sets the Access-Control-Allow-Headers response header. `[*]` allows all headers.
     */
    'allowed_headers' => ['*'],

    /*
     * Sets the Access-Control-Expose-Headers response header.
     */
    'exposed_headers' => false,

    /*
     * Sets the Access-Control-Max-Age response header.
     */
    'max_age' => false,

    /*
     * Sets the Access-Control-Allow-Credentials header.
     */
    'supports_credentials' => false,
];

allowed_origins, allowed_headers and allowed_methods can be set to ['*'] to accept any value.

Note: Try to be a specific as possible. You can start developing with loose constraints, but it's better to be as strict as possible!

Note: Because of http method overriding in Laravel, allowing POST methods will also enable the API users to perform PUT and DELETE requests as well.

Lumen

On Laravel Lumen, just register the ServiceProvider manually:

$app->register(\Fruitcake\Cors\CorsServiceProvider::class);

Global usage for Lumen

To allow CORS for all your routes, add the HandleCors middleware to the global middleware and set the paths property in the config.

$app->middleware([
    // ...
    \Fruitcake\Cors\HandleCors::class,
]);

Disabling CSRF protection for your API

If possible, use a different route group with CSRF protection enabled. Otherwise you can disable CSRF for certain requests in App\Http\Middleware\VerifyCsrfToken:

protected $except = [
    'api/*'
];

License

Released under the MIT License, see LICENSE.

azdonald/laravel-cors