README

EvaOAuth provides a standard interface for OAuth1.0 / OAuth2.0 client authorization, it is easy to integrate with any PHP project by very few lines code.

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Features

• Standard interface, same code for both OAuth1.0 and OAuth2.0 different workflow, receiving token and user info as same format either.
• Fully tested
• Easy to debug, enable debug mode will record every request and response, help you find out problems quickly.
• Out-of-the-box, already supported most popular websites including Facebook. Twitter, etc.
• Scalable, integrate a new oauth website just need 3 lines code.

Quick Start

EvaOAuth can be found on Packagist. The recommended way to install this is through composer.

Edit your composer.json and add:

{
    "require": {
        "evaengine/eva-oauth": "~1.0"
    }
}

And install dependencies:

curl -sS https://getcomposer.org/installer | php
php composer.phar install

Let's start a example of Facebook Login, if you have already have a Facebook developer account and created an app, prepare a request.php as below:

$service = new Eva\EvaOAuth\Service('Facebook', [
    'key' => 'You Facebook App ID',
    'secret' => 'You Facebook App Secret',
    'callback' => 'http://localhost/EvaOAuth/example/access.php'
]);
$service->requestAuthorize();

Run request.php in browser, will be redirected to Facebook authorization page. After user confirm authorization, prepare the access.php for callback:

$token = $service->getAccessToken();

Once access token received, we could use access token to visit any protected resources.

$httpClient = new Eva\EvaOAuth\AuthorizedHttpClient($token);
$response = $httpClient->get('https://graph.facebook.com/me');

That's it, more usages please check examples and wiki.

Providers

EvaOAuth supports most popular OAuth services as below:

• OAuth2.0
  • Douban
  • Facebook
  • Tencent
  • Weibo
• OAuth1.0
  • Twitter

Creating a custom provider require only few lines code, for OAuth2 sites:

namespace YourNamespace;

class Foursquare extends \Eva\EvaOAuth\OAuth2\Providers\AbstractProvider
{
    protected $authorizeUrl = 'https://foursquare.com/oauth2/authorize';
    protected $accessTokenUrl = 'https://foursquare.com/oauth2/access_token';
}

Then register to service and create instance:

use Eva\EvaOAuth\Service;
Service::registerProvider('foursquare', 'YourNamespace\Foursquare');
$service = new Service('foursquare', [
    'key' => 'Foursquare App ID',
    'secret' => 'Foursquare App Secret',
    'callback' => 'http://somecallback/'
]);

Storage

In OAuth1.0 workflow, we need to store request token somewhere, and use request token exchange for access token.

EvaOAuth use Doctrine\Cache as storage layer. If no configuration, default storage layer use file system to save data, default path is EvaOAuth/tmp.

Feel free to change file storage path before Service start:

Service::setStorage(new Doctrine\Common\Cache\FilesystemCache('/tmp'));

Or use other storage such as Memcache:

$storage = new \Doctrine\Common\Cache\MemcacheCache();
$storage->setMemcache(new \Memcache());
Service::setStorage($storage);

Events Support

EvaOAuth defined some events for easier injection which are:

• BeforeGetRequestToken: Triggered before get request token.
• BeforeAuthorize: Triggered before redirect to authorize page.
• BeforeGetAccessToken: Triggered before get access token.

For example, if we want to send an additional header before get access token:

$service->getEmitter()->on('beforeGetAccessToken', function(\Eva\EvaOAuth\Events\BeforeGetAccessToken $event) {
    $event->getRequest()->addHeader('foo', 'bar');
});

Implementation Specification

EvaOAuth based on amazing http client library Guzzle, use fully OOP to describe OAuth specification.

Refer wiki for details:

• OAuth1.0
• OAuth2.0

Debug and Logging

Enable debug mode will log all requests & responses.

$service->debug('/tmp/access.log');

Make sure PHP script have permission to write log path.

API References

Run phpdoc will generate API references under docs/.

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