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README.md

Wechat Provider for OAuth 2.0 Client

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This package provides Wechat OAuth 2.0 support for the PHP League's OAuth 2.0 Client.

  • DONE:

    Website SDK, Mini Programs

  • TODO:

    Mobile App SDK

Installation

To install, use composer:

composer require oakhope/oauth2-wechat

Usage

Usage is the same as The League's OAuth client, using \Oakhope\OAuth2\Client\Provider\{WebProvider} as the provider.

Authorization Code Flow

$provider = new \Oakhope\OAuth2\Client\Provider\WebProvider([
        'appid' => '{wechat-client-id}',
        'secret' => '{wechat-client-secret}',
        'redirect_uri' => 'https://example.com/callback-url'
    ]);

// If we don't have an authorization code then get one
if (!isset($_GET['code'])) {

    // Fetch the authorization URL from the provider; this returns the
    // urlAuthorize option and generates and applies any necessary parameters
    // (e.g. state).
    $authorizationUrl = $provider->getAuthorizationUrl();

    // Get the state generated for you and store it to the session.
    $_SESSION['oauth2state'] = $provider->getState();

    // Redirect the user to the authorization URL.
    header('Location: '.$authorizationUrl);
    exit;

// Check given state against previously stored one to mitigate CSRF attack
} elseif (empty($_GET['state']) || ($_GET['state'] !== rtrim($_SESSION['oauth2state'], '#wechat_redirect'))) {

    unset($_SESSION['oauth2state']);
    exit('Invalid state');

} else {

    try {

        // Try to get an access token using the authorization code grant.
        $accessToken = $provider->getAccessToken(
            'authorization_code',
            [
                'code' => $_GET['code'],
            ]);

        // We have an access token, which we may use in authenticated
        // requests against the service provider's API.
        echo "token: ".$accessToken->getToken()."<br/>";
        echo "refreshToken: ".$accessToken->getRefreshToken()."<br/>";
        echo "Expires: ".$accessToken->getExpires()."<br/>";
        echo ($accessToken->hasExpired() ? 'expired' : 'not expired')."<br/><br/>";

        // Using the access token, we may look up details about the
        // resource owner.
        $resourceOwner = $provider->getResourceOwner($accessToken);

        var_export($resourceOwner->toArray());
        
    } catch (\League\OAuth2\Client\Provider\Exception\IdentityProviderException $e) {

        // Failed to get the access token or user details.
        echo "error:";
        exit($e->getMessage());
    }
}

Refreshing a Token

Once your application is authorized, you can refresh an expired token using a refresh token rather than going through the entire process of obtaining a brand new token. To do so, simply reuse this refresh token from your data store to request a refresh.

This example uses Brent Shaffer's demo OAuth 2.0 application named Lock'd In. See authorization code example above, for more details.

$provider = new \Oakhope\OAuth2\Client\Provider\WebProvider([
        'appid' => '{wechat-client-id}',
        'secret' => '{wechat-client-secret}',
        'redirect_uri' => 'https://example.com/callback-url'
    ]);

$existingAccessToken = getAccessTokenFromYourDataStore();

if ($existingAccessToken->hasExpired()) {
    $newAccessToken = $provider->getAccessToken('refresh_token', [
        'refresh_token' => $existingAccessToken->getRefreshToken()
    ]);

    // Purge old access token and store new access token to your data store.
}

Testing

$ ./vendor/bin/phpunit --colors tests

Contributing

Please see CONTRIBUTING for details.

Credits

License

The MIT License (MIT). Please see License File for more information.

About

微信登录认证授权 Wechat login authorization. This package provides Wechat OAuth 2.0 support for the PHP League's OAuth 2.0 Client

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