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<?php
/**
* File: Cdn_TransparentCDN_Api.php
*
* @package W3TC
*
* @since 0.15.0
*/
namespace W3TC;
if ( ! defined( 'W3TC_CDN_TRANSPARENTCDN_PURGE_URL' ) ) {
define( 'W3TC_CDN_TRANSPARENTCDN_PURGE_URL', 'https://api.transparentcdn.com/v1/companies/%s/invalidate/' );
}
if ( ! defined( 'W3TC_CDN_TRANSPARENTCDN_AUTHORIZATION_URL' ) ) {
define( 'W3TC_CDN_TRANSPARENTCDN_AUTHORIZATION_URL', 'https://api.transparentcdn.com/v1/oauth2/access_token/' );
}
/**
* Class: Cdn_TransparentCDN_Api
*
* @since 0.15.0
*
* phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
* phpcs:disable PSR2.Methods.MethodDeclaration.Underscore
* phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter
*/
class Cdn_TransparentCDN_Api {
/**
* Token.
*
* @since 0.15.0
*
* @var string
*/
private $_token;
/**
* Config.
*
* @since 0.15.0
*
* @var array
*/
private $_config;
/**
* Constructs the Cdn_TransparentCDN_Api object with the provided configuration.
*
* @since 0.15.0
*
* @param array $config Configuration array to initialize the API.
*
* @return void
*/
public function __construct( $config = array() ) {
$config = array_merge(
array(
'company_id' => '',
'client_id' => '',
'client_secret' => '',
),
$config
);
$this->_config = $config;
}
/**
* Purges the specified URLs from the content delivery network.
*
* @since 0.15.0
*
* @param array $urls Array of URLs to purge from the CDN.
*
* @return bool True if purge is successful, false otherwise.
*/
public function purge( $urls ) {
if ( empty( $this->_config['company_id'] ) ) {
return false;
}
if ( empty( $this->_config['client_id'] ) ) {
return false;
}
if ( empty( $this->_config['client_secret'] ) ) {
return false;
}
// We ask for the authorization token.
$this->_get_token();
$invalidation_urls = array();
// Included a regex filter because some of our clients reported receiving urls as "True" or "False".
foreach ( $urls as $url ) {
// Oh array_map+lambdas, how I miss u...
if ( filter_var( $url, FILTER_VALIDATE_URL ) ) {
$invalidation_urls[] = $url;
}
}
if ( count( $invalidation_urls ) === 0 ) {
$invalidation_urls[] = '';
}
return $this->_purge_content( $invalidation_urls, $error );
}
/**
* Purges content from the CDN for the provided list of files.
*
* @since 0.15.0
*
* @param array $files Array of file URLs to purge.
* @param string $error Reference to a string where error messages will be stored.
*
* @return bool True if content purge is successful, false otherwise.
*
* @throws \Exception If there is an issue with the HTTP request.
*/
public function _purge_content( $files, &$error ) {
$url = sprintf( W3TC_CDN_TRANSPARENTCDN_PURGE_URL, $this->_config['company_id'] );
$args = array(
'method' => 'POST',
'user-agent' => W3TC_POWERED_BY,
'headers' => array(
'Accept' => 'application/json',
'Content-Type' => 'application/json',
'Authorization' => sprintf( 'Bearer %s', $this->_token ),
),
'body' => wp_json_encode( array( 'urls' => $files ) ),
);
$response = wp_remote_request( $url, $args );
if ( is_wp_error( $response ) ) {
$error = implode( '; ', $response->get_error_messages() );
return false;
}
switch ( $response['response']['code'] ) {
case 200:
$body = json_decode( $response['body'] );
if ( is_array( $body->urls_to_send ) && count( $body->urls_to_send ) > 0 ) {
// We have invalidated at least one URL.
return true;
} elseif ( 0 < count( $files ) && ! empty( $files[0] ) ) {
$error = __( 'Invalid Request URL', 'w3-total-cache' );
break;
}
return true;
case 400:
if ( count( $files ) > 0 && empty( $files[0] ) ) {
// Test case.
return true;
}
$error = __( 'Invalid Request Parameter', 'w3-total-cache' );
break;
case 403:
$error = __( 'Authentication Failure or Insufficient Access Rights', 'w3-total-cache' );
break;
case 404:
$error = __( 'Invalid Request URI', 'w3-total-cache' );
break;
case 500:
$error = __( 'Server Error', 'w3-total-cache' );
break;
default:
$error = __( 'Unknown error', 'w3-total-cache' );
break;
}
return false;
}
/**
* Purges all content from the CDN.
*
* @since 0.15.0
*
* @param array $results Reference to an array where results will be stored.
*
* @return bool Always returns false as this functionality is not yet implemented.
*
* @todo Implement bans using "*".
*/
public function purge_all( &$results ) {
return false;
}
/**
* Retrieves an authentication token for making API requests.
*
* @since 0.15.0
*
* @return bool True if token retrieval is successful, false otherwise.
*
* @throws \Exception If the token retrieval fails.
*/
public function _get_token() {
$client_id = $this->_config['client_id'];
$client_secret = $this->_config['client_secret'];
$args = array(
'method' => 'POST',
'user-agent' => W3TC_POWERED_BY,
'headers' => array(
'Accept' => 'application/json',
'Content-Type' => 'application/x-www-form-urlencoded',
),
'body' => "grant_type=client_credentials&client_id=$client_id&client_secret=$client_secret",
);
$response = wp_remote_request( W3TC_CDN_TRANSPARENTCDN_AUTHORIZATION_URL, $args );
if ( is_wp_error( $response ) ) {
$error = implode( '; ', $response->get_error_messages() );
return false;
}
$body = $response['body'];
$jobj = json_decode( $body );
$this->_token = $jobj->access_token;
return true;
}
}
/**
* Class: Cdnfsd_TransparentCDN_Engine
*
* @since 0.15.0
*
* phpcs:disable Generic.Files.OneObjectStructurePerFile.MultipleFound
*/
class Cdnfsd_TransparentCDN_Engine {
/**
* Config.
*
* @since 0.15.0
*
* @var array
*/
private $config;
/**
* Constructs the Cdnfsd_TransparentCDN_Engine object with configuration options.
*
* @since 0.15.0
*
* @param array $config Configuration options to initialize the engine.
*
* @return void
*/
public function __construct( $config = array() ) {
$this->config = $config;
}
/**
* Flushes specific URLs from the CDN.
*
* @since 0.15.0
*
* @param array $urls An array of URLs to be purged from the CDN.
*
* @return void
*
* @throws \Exception If the API key is not provided or an error occurs during the purge process.
*/
public function flush_urls( $urls ) {
if ( empty( $this->config['client_id'] ) ) {
throw new \Exception( \esc_html__( 'API key not specified.', 'w3-total-cache' ) );
}
$api = new Cdn_TransparentCDN_Api( $this->config );
try {
$result = $api->purge( $urls );
throw new \Exception( \esc_html__( 'Problem purging', 'w3-total-cache' ) );
} catch ( \Exception $ex ) {
if ( $ex->getMessage() === 'Validation Failure: Purge url must contain one of your hostnames' ) {
throw new \Exception(
\esc_html__(
'CDN site is not configured correctly: Delivery Domain must match your site domain',
'w3-total-cache'
)
);
} else {
throw $ex;
}
}
}
/**
* Flushes all content from the CDN.
*
* @since 0.15.0
*
* @return void
*
* @throws \Exception If the API key is not provided or an error occurs during the purge process.
*/
public function flush_all() {
if ( empty( $this->config['client_id'] ) ) {
throw new \Exception( \esc_html__( 'API key not specified.', 'w3-total-cache' ) );
}
$api = new Cdn_TransparentCDN_Api( $this->config );
$items = array();
$items[] = array(
'url' => home_url( '/' ),
'recursive' => true,
);
try {
$r = $api->purge( array( 'items' => $items ) );
} catch ( \Exception $ex ) {
if ( $ex->getMessage() === 'Validation Failure: Purge url must contain one of your hostnames' ) {
throw new \Exception(
\esc_html__(
'CDN site is not configured correctly: Delivery Domain must match your site domain',
'w3-total-cache'
)
);
} else {
throw $ex;
}
}
}
}