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<?php
/*
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* The Google API Client
* http://code.google.com/p/google-api-php-client/
*
* @author Chris Chabot <chabotc@google.com>
* @author Chirag Shah <chirags@google.com>
*/
class W3TCG_Google_Client
{
const LIBVER = "1.1.0-beta";
const USER_AGENT_SUFFIX = "google-api-php-client/";
/**
* @var W3TCG_Google_Auth_Abstract $auth
*/
private $auth;
/**
* @var W3TCG_Google_IO_Abstract $io
*/
private $io;
/**
* @var W3TCG_Google_Cache_Abstract $cache
*/
private $cache;
/**
* @var W3TCG_Google_Config $config
*/
private $config;
/**
* @var boolean $deferExecution
*/
private $deferExecution = false;
/** @var array $scopes */
// Scopes requested by the client
protected $requestedScopes = array();
// definitions of services that are discovered.
protected $services = array();
// Used to track authenticated state, can't discover services after doing authenticate()
private $authenticated = false;
/**
* Construct the Google Client.
*
* @param $config W3TCG_Google_Config or string for the ini file to load
*/
public function __construct($config = null)
{
if (is_string($config) && strlen($config)) {
$config = new W3TCG_Google_Config($config);
} else if ( !($config instanceof W3TCG_Google_Config)) {
$config = new W3TCG_Google_Config();
if ($this->isAppEngine()) {
// Automatically use Memcache if we're in AppEngine.
$config->setCacheClass('W3TCG_Google_Cache_Memcache');
}
if (version_compare(phpversion(), "5.3.4", "<=") || $this->isAppEngine()) {
// Automatically disable compress.zlib, as currently unsupported.
$config->setClassConfig('W3TCG_Google_Http_Request', 'disable_gzip', true);
}
}
if ($config->getIoClass() == W3TCG_Google_Config::USE_AUTO_IO_SELECTION) {
if (function_exists('curl_version') && function_exists('curl_exec')) {
$config->setIoClass("W3TCG_Google_IO_Curl");
} else {
$config->setIoClass("W3TCG_Google_IO_Stream");
}
}
$this->config = $config;
}
/**
* Get a string containing the version of the library.
*
* @return string
*/
public function getLibraryVersion()
{
return self::LIBVER;
}
/**
* Attempt to exchange a code for an valid authentication token.
* Helper wrapped around the OAuth 2.0 implementation.
*
* @param $code string code from accounts.google.com
* @return string token
*/
public function authenticate($code)
{
$this->authenticated = true;
return $this->getAuth()->authenticate($code);
}
/**
* Set the auth config from the JSON string provided.
* This structure should match the file downloaded from
* the "Download JSON" button on in the Google Developer
* Console.
* @param string $json the configuration json
* @throws W3TCG_Google_Exception
*/
public function setAuthConfig($json)
{
$data = json_decode($json);
$key = isset($data->installed) ? 'installed' : 'web';
if (!isset($data->$key)) {
throw new W3TCG_Google_Exception("Invalid client secret JSON file.");
}
$this->setClientId($data->$key->client_id);
$this->setClientSecret($data->$key->client_secret);
if (isset($data->$key->redirect_uris)) {
$this->setRedirectUri($data->$key->redirect_uris[0]);
}
}
/**
* Set the auth config from the JSON file in the path
* provided. This should match the file downloaded from
* the "Download JSON" button on in the Google Developer
* Console.
* @param string $file the file location of the client json
*/
public function setAuthConfigFile($file)
{
$this->setAuthConfig(file_get_contents($file));
}
/**
* @throws W3TCG_Google_Auth_Exception
* @return array
* @visible For Testing
*/
public function prepareScopes()
{
if (empty($this->requestedScopes)) {
throw new W3TCG_Google_Auth_Exception("No scopes specified");
}
$scopes = implode(' ', $this->requestedScopes);
return $scopes;
}
/**
* Set the OAuth 2.0 access token using the string that resulted from calling createAuthUrl()
* or W3TCG_Google_Client#getAccessToken().
* @param string $accessToken JSON encoded string containing in the following format:
* {"access_token":"TOKEN", "refresh_token":"TOKEN", "token_type":"Bearer",
* "expires_in":3600, "id_token":"TOKEN", "created":1320790426}
*/
public function setAccessToken($accessToken)
{
if ($accessToken == 'null') {
$accessToken = null;
}
$this->getAuth()->setAccessToken($accessToken);
}
/**
* Set the authenticator object
* @param W3TCG_Google_Auth_Abstract $auth
*/
public function setAuth(W3TCG_Google_Auth_Abstract $auth)
{
$this->config->setAuthClass(get_class($auth));
$this->auth = $auth;
}
/**
* Set the IO object
* @param W3TCG_Google_IO_Abstract $io
*/
public function setIo(W3TCG_Google_IO_Abstract $io)
{
$this->config->setIoClass(get_class($io));
$this->io = $io;
}
/**
* Set the Cache object
* @param W3TCG_Google_Cache_Abstract $cache
*/
public function setCache(W3TCG_Google_Cache_Abstract $cache)
{
$this->config->setCacheClass(get_class($cache));
$this->cache = $cache;
}
/**
* Construct the OAuth 2.0 authorization request URI.
* @return string
*/
public function createAuthUrl()
{
$scopes = $this->prepareScopes();
return $this->getAuth()->createAuthUrl($scopes);
}
/**
* Get the OAuth 2.0 access token.
* @return string $accessToken JSON encoded string in the following format:
* {"access_token":"TOKEN", "refresh_token":"TOKEN", "token_type":"Bearer",
* "expires_in":3600,"id_token":"TOKEN", "created":1320790426}
*/
public function getAccessToken()
{
$token = $this->getAuth()->getAccessToken();
// The response is json encoded, so could be the string null.
// It is arguable whether this check should be here or lower
// in the library.
return (null == $token || 'null' == $token || '[]' == $token) ? null : $token;
}
/**
* Get the OAuth 2.0 refresh token.
* @return string $refreshToken refresh token or null if not available
*/
public function getRefreshToken()
{
return $this->getAuth()->getRefreshToken();
}
/**
* Returns if the access_token is expired.
* @return bool Returns True if the access_token is expired.
*/
public function isAccessTokenExpired()
{
return $this->getAuth()->isAccessTokenExpired();
}
/**
* Set OAuth 2.0 "state" parameter to achieve per-request customization.
* @see http://tools.ietf.org/html/draft-ietf-oauth-v2-22#section-3.1.2.2
* @param string $state
*/
public function setState($state)
{
$this->getAuth()->setState($state);
}
/**
* @param string $accessType Possible values for access_type include:
* {@code "offline"} to request offline access from the user.
* {@code "online"} to request online access from the user.
*/
public function setAccessType($accessType)
{
$this->config->setAccessType($accessType);
}
/**
* @param string $approvalPrompt Possible values for approval_prompt include:
* {@code "force"} to force the approval UI to appear. (This is the default value)
* {@code "auto"} to request auto-approval when possible.
*/
public function setApprovalPrompt($approvalPrompt)
{
$this->config->setApprovalPrompt($approvalPrompt);
}
/**
* Set the login hint, email address or sub id.
* @param string $loginHint
*/
public function setLoginHint($loginHint)
{
$this->config->setLoginHint($loginHint);
}
/**
* Set the application name, this is included in the User-Agent HTTP header.
* @param string $applicationName
*/
public function setApplicationName($applicationName)
{
$this->config->setApplicationName($applicationName);
}
/**
* Set the OAuth 2.0 Client ID.
* @param string $clientId
*/
public function setClientId($clientId)
{
$this->config->setClientId($clientId);
}
/**
* Set the OAuth 2.0 Client Secret.
* @param string $clientSecret
*/
public function setClientSecret($clientSecret)
{
$this->config->setClientSecret($clientSecret);
}
/**
* Set the OAuth 2.0 Redirect URI.
* @param string $redirectUri
*/
public function setRedirectUri($redirectUri)
{
$this->config->setRedirectUri($redirectUri);
}
/**
* If 'plus.login' is included in the list of requested scopes, you can use
* this method to define types of app activities that your app will write.
* You can find a list of available types here:
* @link https://developers.google.com/+/api/moment-types
*
* @param array $requestVisibleActions Array of app activity types
*/
public function setRequestVisibleActions($requestVisibleActions)
{
if (is_array($requestVisibleActions)) {
$requestVisibleActions = join(" ", $requestVisibleActions);
}
$this->config->setRequestVisibleActions($requestVisibleActions);
}
/**
* Set the developer key to use, these are obtained through the API Console.
* @see http://code.google.com/apis/console-help/#generatingdevkeys
* @param string $developerKey
*/
public function setDeveloperKey($developerKey)
{
$this->config->setDeveloperKey($developerKey);
}
/**
* Set the hd (hosted domain) parameter streamlines the login process for
* Google Apps hosted accounts. By including the domain of the user, you
* restrict sign-in to accounts at that domain.
* @param $hd string - the domain to use.
*/
public function setHostedDomain($hd)
{
$this->config->setHostedDomain($hd);
}
/**
* Set the prompt hint. Valid values are none, consent and select_account.
* If no value is specified and the user has not previously authorized
* access, then the user is shown a consent screen.
* @param $prompt string
*/
public function setPrompt($prompt)
{
$this->config->setPrompt($prompt);
}
/**
* openid.realm is a parameter from the OpenID 2.0 protocol, not from OAuth
* 2.0. It is used in OpenID 2.0 requests to signify the URL-space for which
* an authentication request is valid.
* @param $realm string - the URL-space to use.
*/
public function setOpenidRealm($realm)
{
$this->config->setOpenidRealm($realm);
}
/**
* If this is provided with the value true, and the authorization request is
* granted, the authorization will include any previous authorizations
* granted to this user/application combination for other scopes.
* @param $include boolean - the URL-space to use.
*/
public function setIncludeGrantedScopes($include)
{
$this->config->setIncludeGrantedScopes($include);
}
/**
* Fetches a fresh OAuth 2.0 access token with the given refresh token.
* @param string $refreshToken
*/
public function refreshToken($refreshToken)
{
$this->getAuth()->refreshToken($refreshToken);
}
/**
* Revoke an OAuth2 access token or refresh token. This method will revoke the current access
* token, if a token isn't provided.
* @throws W3TCG_Google_Auth_Exception
* @param string|null $token The token (access token or a refresh token) that should be revoked.
* @return boolean Returns True if the revocation was successful, otherwise False.
*/
public function revokeToken($token = null)
{
return $this->getAuth()->revokeToken($token);
}
/**
* Verify an id_token. This method will verify the current id_token, if one
* isn't provided.
* @throws W3TCG_Google_Auth_Exception
* @param string|null $token The token (id_token) that should be verified.
* @return W3TCG_Google_Auth_LoginTicket Returns an apiLoginTicket if the verification was
* successful.
*/
public function verifyIdToken($token = null)
{
return $this->getAuth()->verifyIdToken($token);
}
/**
* Verify a JWT that was signed with your own certificates.
*
* @param $id_token string The JWT token
* @param $cert_location array of certificates
* @param $audience string the expected consumer of the token
* @param $issuer string the expected issuer, defaults to Google
* @param [$max_expiry] the max lifetime of a token, defaults to MAX_TOKEN_LIFETIME_SECS
* @return mixed token information if valid, false if not
*/
public function verifySignedJwt($id_token, $cert_location, $audience, $issuer, $max_expiry = null)
{
$auth = new W3TCG_Google_Auth_OAuth2($this);
$certs = $auth->retrieveCertsFromLocation($cert_location);
return $auth->verifySignedJwtWithCerts($id_token, $certs, $audience, $issuer, $max_expiry);
}
/**
* @param $creds W3TCG_Google_Auth_AssertionCredentials
*/
public function setAssertionCredentials(W3TCG_Google_Auth_AssertionCredentials $creds)
{
$this->getAuth()->setAssertionCredentials($creds);
}
/**
* Set the scopes to be requested. Must be called before createAuthUrl().
* Will remove any previously configured scopes.
* @param array $scopes, ie: array('https://www.googleapis.com/auth/plus.login',
* 'https://www.googleapis.com/auth/moderator')
*/
public function setScopes($scopes)
{
$this->requestedScopes = array();
$this->addScope($scopes);
}
/**
* This functions adds a scope to be requested as part of the OAuth2.0 flow.
* Will append any scopes not previously requested to the scope parameter.
* A single string will be treated as a scope to request. An array of strings
* will each be appended.
* @param $scope_or_scopes string|array e.g. "profile"
*/
public function addScope($scope_or_scopes)
{
if (is_string($scope_or_scopes) && !in_array($scope_or_scopes, $this->requestedScopes)) {
$this->requestedScopes[] = $scope_or_scopes;
} else if (is_array($scope_or_scopes)) {
foreach ($scope_or_scopes as $scope) {
$this->addScope($scope);
}
}
}
/**
* Returns the list of scopes requested by the client
* @return array the list of scopes
*
*/
public function getScopes()
{
return $this->requestedScopes;
}
/**
* Declare whether batch calls should be used. This may increase throughput
* by making multiple requests in one connection.
*
* @param boolean $useBatch True if the batch support should
* be enabled. Defaults to False.
*/
public function setUseBatch($useBatch)
{
// This is actually an alias for setDefer.
$this->setDefer($useBatch);
}
/**
* Declare whether making API calls should make the call immediately, or
* return a request which can be called with ->execute();
*
* @param boolean $defer True if calls should not be executed right away.
*/
public function setDefer($defer)
{
$this->deferExecution = $defer;
}
/**
* Helper method to execute deferred HTTP requests.
*
* @param $request W3TCG_Google_Http_Request|Google_Http_Batch
* @throws W3TCG_Google_Exception
* @return object of the type of the expected class or array.
*/
public function execute($request)
{
if ($request instanceof W3TCG_Google_Http_Request) {
$request->setUserAgent(
$this->getApplicationName()
. " " . self::USER_AGENT_SUFFIX
. $this->getLibraryVersion()
);
if (!$this->getClassConfig("W3TCG_Google_Http_Request", "disable_gzip")) {
$request->enableGzip();
}
$request->maybeMoveParametersToBody();
return W3TCG_Google_Http_REST::execute($this, $request);
} else if ($request instanceof W3TCG_Google_Http_Batch) {
return $request->execute();
} else {
throw new W3TCG_Google_Exception("Do not know how to execute this type of object.");
}
}
/**
* Whether or not to return raw requests
* @return boolean
*/
public function shouldDefer()
{
return $this->deferExecution;
}
/**
* @return W3TCG_Google_Auth_Abstract Authentication implementation
*/
public function getAuth()
{
if (!isset($this->auth)) {
$class = $this->config->getAuthClass();
$this->auth = new $class($this);
}
return $this->auth;
}
/**
* @return W3TCG_Google_IO_Abstract IO implementation
*/
public function getIo()
{
if (!isset($this->io)) {
$class = $this->config->getIoClass();
$this->io = new $class($this);
}
return $this->io;
}
/**
* @return W3TCG_Google_Cache_Abstract Cache implementation
*/
public function getCache()
{
if (!isset($this->cache)) {
$class = $this->config->getCacheClass();
$this->cache = new $class($this);
}
return $this->cache;
}
/**
* Retrieve custom configuration for a specific class.
* @param $class string|object - class or instance of class to retrieve
* @param $key string optional - key to retrieve
* @return array
*/
public function getClassConfig($class, $key = null)
{
if (!is_string($class)) {
$class = get_class($class);
}
return $this->config->getClassConfig($class, $key);
}
/**
* Set configuration specific to a given class.
* $config->setClassConfig('W3TCG_Google_Cache_File',
* array('directory' => '/tmp/cache'));
* @param $class string|object - The class name for the configuration
* @param $config string key or an array of configuration values
* @param $value string optional - if $config is a key, the value
*
*/
public function setClassConfig($class, $config, $value = null)
{
if (!is_string($class)) {
$class = get_class($class);
}
$this->config->setClassConfig($class, $config, $value);
}
/**
* @return string the base URL to use for calls to the APIs
*/
public function getBasePath()
{
return $this->config->getBasePath();
}
/**
* @return string the name of the application
*/
public function getApplicationName()
{
return $this->config->getApplicationName();
}
/**
* Are we running in Google AppEngine?
* return bool
*/
public function isAppEngine()
{
return (isset($_SERVER['SERVER_SOFTWARE']) &&
strpos( sanitize_text_field( wp_unslash( $_SERVER['SERVER_SOFTWARE'] ) ), 'Google App Engine') !== false);
}
}