Add Symfony Deprecation Contracts package
- Created CHANGELOG.md to maintain version history. - Added README.md with usage instructions for the trigger_deprecation() function. - Initialized composer.json for the Symfony Deprecation Contracts library, specifying dependencies and autoloading.
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# Google Provider for OAuth 2.0 Client
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[](https://github.com/thephpleague/oauth2-google/actions/workflows/test.yaml)
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[](https://app.codecov.io/gh/thephpleague/oauth2-google)
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[](https://github.com/thephpleague/oauth2-google/blob/main/LICENSE)
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[](https://packagist.org/packages/league/oauth2-google)
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This package provides Google OAuth 2.0 support for the PHP League's [OAuth 2.0 Client](https://github.com/thephpleague/oauth2-client).
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This package is compliant with [PSR-1][], [PSR-2][] and [PSR-4][]. If you notice compliance oversights, please send
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a patch via pull request.
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[PSR-1]: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-1-basic-coding-standard.md
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[PSR-2]: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
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[PSR-4]: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader.md
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## Requirements
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The following versions of PHP are supported.
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* PHP 7.3
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* PHP 7.4
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* PHP 8.0
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* PHP 8.1
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This package uses [OpenID Connect][openid-connect] to authenticate users with
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Google accounts.
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To use this package, it will be necessary to have a Google client ID and client
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secret. These are referred to as `{google-client-id}` and `{google-client-secret}`
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in the documentation.
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Please follow the [Google instructions][oauth-setup] to create the required credentials.
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[openid-connect]: https://developers.google.com/identity/protocols/OpenIDConnect
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[oauth-setup]: https://developers.google.com/identity/protocols/OpenIDConnect#registeringyourapp
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## Installation
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To install, use composer:
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```sh
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composer require league/oauth2-google
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```
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## Usage
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### Authorization Code Flow
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```php
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require __DIR__ . '/vendor/autoload.php';
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use League\OAuth2\Client\Provider\Google;
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session_start(); // Remove if session.auto_start=1 in php.ini
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$provider = new Google([
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'clientId' => '{google-client-id}',
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'clientSecret' => '{google-client-secret}',
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'redirectUri' => 'https://example.com/callback-url',
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'hostedDomain' => 'example.com', // optional; used to restrict access to users on your G Suite/Google Apps for Business accounts
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]);
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if (!empty($_GET['error'])) {
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// Got an error, probably user denied access
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exit('Got error: ' . htmlspecialchars($_GET['error'], ENT_QUOTES, 'UTF-8'));
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} elseif (empty($_GET['code'])) {
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// If we don't have an authorization code then get one
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$authUrl = $provider->getAuthorizationUrl();
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$_SESSION['oauth2state'] = $provider->getState();
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header('Location: ' . $authUrl);
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exit;
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} elseif (empty($_GET['state']) || ($_GET['state'] !== $_SESSION['oauth2state'])) {
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// State is invalid, possible CSRF attack in progress
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unset($_SESSION['oauth2state']);
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exit('Invalid state');
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} else {
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// Try to get an access token (using the authorization code grant)
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$token = $provider->getAccessToken('authorization_code', [
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'code' => $_GET['code']
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]);
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// Optional: Now you have a token you can look up a users profile data
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try {
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// We got an access token, let's now get the owner details
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$ownerDetails = $provider->getResourceOwner($token);
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// Use these details to create a new profile
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printf('Hello %s!', $ownerDetails->getFirstName());
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} catch (Exception $e) {
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// Failed to get user details
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exit('Something went wrong: ' . $e->getMessage());
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}
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// Use this to interact with an API on the users behalf
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echo $token->getToken();
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// Use this to get a new access token if the old one expires
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echo $token->getRefreshToken();
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// Unix timestamp at which the access token expires
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echo $token->getExpires();
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}
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```
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#### Available Options
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The `Google` provider has the following [options][auth-params]:
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- `accessType` to use online or offline access
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- `hostedDomain` to authenticate G Suite users
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- `prompt` to modify the prompt that the user will see
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- `scopes` to request access to additional user information
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[auth-params]: https://developers.google.com/identity/protocols/OpenIDConnect#authenticationuriparameters
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#### Accessing Token JWT
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Google provides a [JSON Web Token][jwt] (JWT) with all access tokens. This token
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[contains basic information][openid-jwt] about the authenticated user. The JWT
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can be accessed from the `id_token` value of the access token:
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```php
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/** @var League\OAuth2\Client\Token\AccessToken $token */
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$values = $token->getValues();
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/** @var string */
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$jwt = $values['id_token'];
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```
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Parsing the JWT will require a [JWT parser][jwt-parsers]. Refer to parser
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documentation for instructions.
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[jwt]: https://jwt.io/
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[openid-jwt]: https://developers.google.com/identity/protocols/OpenIDConnect#obtainuserinfo
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[jwt-parsers]: https://packagist.org/search/?q=jwt
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### Refreshing a Token
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Refresh tokens are only provided to applications which request offline access. You can specify offline access by setting the `accessType` option in your provider:
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```php
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use League\OAuth2\Client\Provider\Google;
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$provider = new Google([
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'clientId' => '{google-client-id}',
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'clientSecret' => '{google-client-secret}',
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'redirectUri' => 'https://example.com/callback-url',
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'accessType' => 'offline',
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]);
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```
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It is important to note that the refresh token is only returned on the first request after this it will be `null`. You should securely store the refresh token when it is returned:
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```php
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$token = $provider->getAccessToken('authorization_code', [
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'code' => $code
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]);
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// persist the token in a database
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$refreshToken = $token->getRefreshToken();
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```
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If you ever need to get a new refresh token you can request one by forcing the consent prompt:
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```php
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$authUrl = $provider->getAuthorizationUrl(['prompt' => 'consent', 'access_type' => 'offline']);
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```
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Now you have everything you need to refresh an access token using a refresh token:
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```php
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use League\OAuth2\Client\Provider\Google;
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use League\OAuth2\Client\Grant\RefreshToken;
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$provider = new Google([
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'clientId' => '{google-client-id}',
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'clientSecret' => '{google-client-secret}',
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'redirectUri' => 'https://example.com/callback-url',
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]);
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$grant = new RefreshToken();
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$token = $provider->getAccessToken($grant, ['refresh_token' => $refreshToken]);
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```
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## Scopes
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Additional [scopes][scopes] can be set by using the `scope` parameter when
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generating the authorization URL:
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```php
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$authorizationUrl = $provider->getAuthorizationUrl([
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'scope' => [
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'scope-url-here'
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],
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]);
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```
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[scopes]: https://developers.google.com/identity/protocols/googlescopes
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## Testing
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Tests can be run with:
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```sh
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composer test
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```
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Style checks can be run with:
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```sh
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composer check
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```
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## Contributing
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Please see [CONTRIBUTING](https://github.com/thephpleague/oauth2-google/blob/main/CONTRIBUTING.md) for details.
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## Credits
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- [Woody Gilk](https://github.com/shadowhand)
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- [All Contributors](https://github.com/thephpleague/oauth2-google/contributors)
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## License
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The MIT License (MIT). Please see [License File](https://github.com/thephpleague/oauth2-google/blob/main/LICENSE) for more information.
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