* @param string|false $postfix File extension (with dot) when mapping by file type.

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* @return string|false Replaced URL on success, false when not applicable.

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*/

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public function rewrite( $url, $mapping_kind, $postfix = false ) {

[503] Fix | Delete

self::debug2( 'rewrite ' . $url );

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$url_parsed = wp_parse_url( $url );

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if ( empty( $url_parsed['path'] ) ) {

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self::debug2( '-rewrite bypassed: no path' );

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return false;

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}

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// Only images under wp-content/wp-includes can be replaced

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$is_internal_folder = Utility::str_hit_array( $url_parsed['path'], $this->_cfg_ori_dir );

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if ( ! $is_internal_folder ) {

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self::debug2( '-rewrite failed: path not match: ' . LSCWP_CONTENT_FOLDER );

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return false;

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}

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// Check if is external url

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if ( ! empty( $url_parsed['host'] ) ) {

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if ( ! Utility::internal( $url_parsed['host'] ) && ! $this->_is_ori_url( $url ) ) {

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self::debug2( '-rewrite failed: host not internal' );

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return false;

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}

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}

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$exclude = Utility::str_hit_array( $url, $this->_cfg_cdn_exclude );

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if ( $exclude ) {

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self::debug2( '-abort excludes ' . $exclude );

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return false;

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}

[531] Fix | Delete

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// Fill full url before replacement

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if ( empty( $url_parsed['host'] ) ) {

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$url = Utility::uri2url( $url );

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self::debug2( '-fill before rewritten: ' . $url );

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$url_parsed = wp_parse_url( $url );

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}

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$scheme = ! empty( $url_parsed['scheme'] ) ? $url_parsed['scheme'] . ':' : '';

[541] Fix | Delete

[542] Fix | Delete

// Find the mapping url to be replaced to

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if ( empty( $this->_cfg_cdn_mapping[ $mapping_kind ] ) ) {

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return false;

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}

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if ( Base::CDN_MAPPING_FILETYPE !== $mapping_kind ) {

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$final_url = $this->_cfg_cdn_mapping[ $mapping_kind ];

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} else {

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// select from file type

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$final_url = $this->_cfg_cdn_mapping[ $postfix ];

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if ( ! $final_url ) {

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return false;

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}

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}

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// If filetype to url is one to many, need to random one

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if ( is_array( $final_url ) ) {

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$final_url = $final_url[ array_rand( $final_url ) ];

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}

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// Now lets replace CDN url

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foreach ( $this->_cfg_url_ori as $v ) {

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if ( false !== strpos( $v, '*' ) ) {

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$url = preg_replace( '#' . $scheme . $v . '#iU', $final_url, $url );

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} else {

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$url = str_replace( $scheme . $v, $final_url, $url );

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}

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}

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self::debug2( '-rewritten: ' . $url );

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return $url;

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}

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/**

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* Check if the given URL matches any configured "original" URLs for CDN.

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*

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* @since 2.1

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* @access private

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*

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* @param string $url URL to test.

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* @return bool True if URL is one of the originals.

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*/

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private function _is_ori_url( $url ) {

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$url_parsed = wp_parse_url( $url );

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$scheme = ! empty( $url_parsed['scheme'] ) ? $url_parsed['scheme'] . ':' : '';

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foreach ( $this->_cfg_url_ori as $v ) {

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$needle = $scheme . $v;

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if ( false !== strpos( $v, '*' ) ) {

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if ( preg_match( '#' . $needle . '#iU', $url ) ) {

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return true;

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}

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} elseif ( 0 === strpos( $url, $needle ) ) {

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return true;

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}

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}

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return false;

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}

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/**

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* Check if the host is one of the CDN mapping hosts.

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*

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* @since 1.2.3

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*

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* @param string $host Hostname to check.

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* @return bool False when bypassed, otherwise true if internal CDN host.

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*/

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public static function internal( $host ) {

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if ( defined( self::BYPASS ) ) {

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return false;

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}

[614] Fix | Delete

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$instance = self::cls();

[616] Fix | Delete

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return in_array( $host, $instance->cdn_mapping_hosts, true ); // todo: can add $this->_is_ori_url() check in future

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}

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}

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