332 lines
7.7 KiB
PHP
332 lines
7.7 KiB
PHP
<?php
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namespace W3TC;
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if ( !defined( 'W3TC_SKIPLIB_AWS' ) ) {
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require_once W3TC_DIR . '/vendor/autoload.php';
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}
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/**
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* Amazon CloudFront (mirror) CDN engine
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*/
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class CdnEngine_Mirror_CloudFront extends CdnEngine_Mirror {
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private $api;
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/**
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* Constructor
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*/
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function __construct( $config = array() ) {
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parent::__construct( $config );
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}
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/**
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* Initializes S3 object
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*
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* @param string $error
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* @return bool
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*/
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function _init() {
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if ( !is_null( $this->api ) ) {
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return;
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}
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if ( empty( $this->_config['key'] ) && empty( $this->_config['secret'] ) ) {
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$credentials = \Aws\Credentials\CredentialProvider::defaultProvider();
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} else {
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$credentials = new \Aws\Credentials\Credentials(
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$this->_config['key'],
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$this->_config['secret'] );
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}
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$this->api = new \Aws\CloudFront\CloudFrontClient( array(
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'credentials' => $credentials,
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'region' => 'us-east-1',
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'version' => '2018-11-05'
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)
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);
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return true;
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}
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/**
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* Returns origin
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*
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* @return string
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*/
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function _get_origin() {
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return Util_Environment::host_port();
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}
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/**
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* Purge files from CDN
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*
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* @param array $files
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* @param array $results
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* @return boolean
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*/
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function purge( $files, &$results ) {
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try {
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$this->_init();
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$dist = $this->_get_distribution();
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} catch ( \Exception $ex ) {
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$results = $this->_get_results( $files, W3TC_CDN_RESULT_HALT, $ex->getMessage() );
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return false;
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}
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$paths = array();
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foreach ( $files as $file ) {
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$remote_file = $file['remote_path'];
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$paths[] = '/' . $remote_file;
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}
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try {
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$invalidation = $this->api->createInvalidation( array(
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'DistributionId' => $dist['Id'],
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'InvalidationBatch' => array(
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'CallerReference' => 'w3tc-' . microtime(),
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'Paths' => array(
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'Items' => $paths,
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'Quantity' => count( $paths ),
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),
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)
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)
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);
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} catch ( \Exception $ex ) {
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$results = $this->_get_results( $files, W3TC_CDN_RESULT_HALT,
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sprintf( 'Unable to create invalidation batch (%s).',
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$ex->getMessage() ) );
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return false;
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}
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$results = $this->_get_results( $files, W3TC_CDN_RESULT_OK, 'OK' );
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return true;
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}
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/**
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* Purge CDN completely
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*
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* @param unknown $results
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* @return bool
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*/
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function purge_all( &$results ) {
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return $this->purge( array( array( 'remote_path' => '*' ) ), $results );
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}
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/**
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* Returns array of CDN domains
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*
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* @return array
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*/
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function get_domains() {
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if ( !empty( $this->_config['cname'] ) ) {
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return (array) $this->_config['cname'];
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} elseif ( !empty( $this->_config['id'] ) ) {
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$domain = sprintf( '%s.cloudfront.net', $this->_config['id'] );
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return array(
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$domain
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);
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}
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return array();
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}
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/**
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* Tests CF
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*
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* @param string $error
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* @return boolean
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*/
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function test( &$error ) {
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$this->_init();
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/**
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* Search active CF distribution
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*/
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$dists = $this->api->listDistributions();
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if ( !isset( $dists['DistributionList']['Items'] ) ) {
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$error = 'Unable to list distributions.';
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return false;
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}
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if ( !count( $dists['DistributionList']['Items'] ) ) {
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$error = 'No distributions found.';
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return false;
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}
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$dist = $this->_get_distribution( $dists );
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if ( $dist["Status"] != 'Deployed' ) {
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$error = sprintf( 'Distribution status is not Deployed, but "%s".', $dist["Status"] );
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return false;
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}
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if ( !$dist['Enabled'] ) {
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$error = sprintf( 'Distribution for origin "%s" is disabled.', $origin );
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return false;
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}
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if ( !empty( $this->_config['cname'] ) ) {
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$domains = (array) $this->_config['cname'];
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$cnames = ( isset( $dist['Aliases']['Items'] ) ? (array) $dist['Aliases']['Items'] : array() );
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foreach ( $domains as $domain ) {
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$_domains = array_map( 'trim', explode( ',', $domain ) );
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foreach ( $_domains as $_domain ) {
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if ( !in_array( $_domain, $cnames ) ) {
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$error = sprintf( 'Domain name %s is not in distribution <acronym title="Canonical Name">CNAME</acronym> list.', $_domain );
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return false;
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}
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}
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}
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} elseif ( !empty( $this->_config['id'] ) ) {
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$domain = $this->get_domain();
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if ( $domain != $dist['DomainName'] ) {
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$error = sprintf( 'Distribution domain name mismatch (%s != %s).', $domain, $dist['DomainName'] );
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return false;
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}
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}
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return true;
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}
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/**
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* Create distribution
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*/
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function create_container() {
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$this->_init();
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// plugin cant set CNAMEs list since it CloudFront requires
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// certificate to be specified associated with it
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$cnames = array();
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// make distibution
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$originDomain = $this->_get_origin();
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try {
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$result = $this->api->createDistribution( array(
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'DistributionConfig' => array(
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'CallerReference' => $originDomain,
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'Comment' => 'Created by W3-Total-Cache',
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'DefaultCacheBehavior' => array(
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'AllowedMethods' => array(
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'CachedMethods' => array(
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'Items' => array( 'HEAD', 'GET' ),
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'Quantity' => 2,
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),
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'Items' => array( 'HEAD', 'GET' ),
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'Quantity' => 2,
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),
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'Compress' => true,
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'DefaultTTL' => 86400,
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'FieldLevelEncryptionId' => '',
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'ForwardedValues' => array(
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'Cookies' => array(
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'Forward' => 'none',
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),
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'Headers' => array(
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'Quantity' => 0,
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),
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'QueryString' => false,
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'QueryStringCacheKeys' => array(
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'Quantity' => 0,
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),
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),
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'LambdaFunctionAssociations' => array( 'Quantity' => 0),
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'MinTTL' => 0,
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'SmoothStreaming' => false,
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'TargetOriginId' => $originDomain,
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'TrustedSigners' => array(
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'Enabled' => false,
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'Quantity' => 0,
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),
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'ViewerProtocolPolicy' => 'allow-all',
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),
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'Enabled' => true,
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'Origins' => array(
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'Items' => array(
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array(
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'DomainName' => $originDomain,
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'Id' => $originDomain,
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'OriginPath' => '',
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'CustomHeaders' => array( 'Quantity' => 0 ),
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'CustomOriginConfig' => array(
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'HTTPPort' => 80,
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'HTTPSPort' => 443,
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'OriginProtocolPolicy' => 'match-viewer'
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),
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),
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),
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'Quantity' => 1,
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),
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'Aliases' => array(
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'Items' => $cnames,
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'Quantity' => count( $cnames )
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)
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)
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));
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// extract domain dynamic part stored later in a config
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$domain = $result['Distribution']['DomainName'];
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$container_id = '';
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if ( preg_match( '~^(.+)\.cloudfront\.net$~', $domain, $matches ) ) {
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$container_id = $matches[1];
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}
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return $container_id;
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} catch ( \Aws\Exception\AwsException $ex ) {
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throw new \Exception( sprintf(
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'Unable to create distribution for origin %s: %s', $originDomain,
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$ex->getAwsErrorMessage() ) );
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} catch ( \Exception $ex ) {
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throw new \Exception( sprintf(
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'Unable to create distribution for origin %s: %s', $originDomain,
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$ex->getMessage() ) );
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}
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}
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/**
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* Returns via string
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*/
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function get_via() {
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$domain = $this->get_domain();
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$via = ( $domain ? $domain : 'N/A' );
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return sprintf( 'Amazon Web Services: CloudFront: %s', $via );
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}
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private function _get_distribution( $dists = null ) {
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if ( is_null( $dists ) ) {
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$dists = $this->api->listDistributions();
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}
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if ( !isset( $dists['DistributionList']['Items'] ) ||
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!count( $dists['DistributionList']['Items'] ) ) {
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throw new \Exception( 'No distributions found.' );
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}
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$dist = false;
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$origin = $this->_get_origin();
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$items = $dists['DistributionList']['Items'];
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foreach ( $items as $dist ) {
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if ( isset( $dist['Origins']['Items'] ) ) {
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foreach ( $dist['Origins']['Items'] as $o ) {
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if ( isset( $o['DomainName'] ) && $o['DomainName'] == $origin ) {
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return $dist;
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}
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}
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}
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}
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throw new \Exception( sprintf( 'Distribution for origin "%s" not found.', $origin ) );
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}
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}
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