Wordpress 3.7
[autoinstalls/wordpress.git] / wp-includes / class-oembed.php
index 8bfe258651796ce1a92f27c537078b801e72a4f1..cc36b2e69ff686b9d178226433d8aeecfe4126fb 100644 (file)
@@ -26,31 +26,50 @@ class WP_oEmbed {
         * @uses apply_filters() Filters a list of pre-defined oEmbed providers.
         */
        function __construct() {
-               // List out some popular sites that support oEmbed.
-               // The WP_Embed class disables discovery for non-unfiltered_html users, so only providers in this array will be used for them.
-               // Add to this list using the wp_oembed_add_provider() function (see it's PHPDoc for details).
-               $this->providers = apply_filters( 'oembed_providers', array(
-                       '#http://(www\.)?youtube.com/watch.*#i'         => array( 'http://www.youtube.com/oembed',            true  ),
-                       'http://youtu.be/*'                             => array( 'http://www.youtube.com/oembed',            false ),
-                       'http://blip.tv/*'                              => array( 'http://blip.tv/oembed/',                   false ),
-                       '#http://(www\.)?vimeo\.com/.*#i'               => array( 'http://www.vimeo.com/api/oembed.{format}', true  ),
-                       '#http://(www\.)?dailymotion\.com/.*#i'         => array( 'http://www.dailymotion.com/api/oembed',    true  ),
-                       '#http://(www\.)?flickr\.com/.*#i'              => array( 'http://www.flickr.com/services/oembed/',   true  ),
-                       '#http://(.+)?smugmug\.com/.*#i'                => array( 'http://api.smugmug.com/services/oembed/',  true  ),
-                       '#http://(www\.)?hulu\.com/watch/.*#i'          => array( 'http://www.hulu.com/api/oembed.{format}',  true  ),
-                       '#http://(www\.)?viddler\.com/.*#i'             => array( 'http://lab.viddler.com/services/oembed/',  true  ),
-                       'http://qik.com/*'                              => array( 'http://qik.com/api/oembed.{format}',       false ),
-                       'http://revision3.com/*'                        => array( 'http://revision3.com/api/oembed/',         false ),
-                       'http://i*.photobucket.com/albums/*'            => array( 'http://photobucket.com/oembed',            false ),
-                       'http://gi*.photobucket.com/groups/*'           => array( 'http://photobucket.com/oembed',            false ),
-                       '#http://(www\.)?scribd\.com/.*#i'              => array( 'http://www.scribd.com/services/oembed',    true  ),
-                       'http://wordpress.tv/*'                         => array( 'http://wordpress.tv/oembed/',              false ),
-                       '#http://(answers|surveys)\.polldaddy.com/.*#i' => array( 'http://polldaddy.com/oembed/',             true  ),
-                       '#http://(www\.)?funnyordie\.com/videos/.*#i'   => array( 'http://www.funnyordie.com/oembed',         true  ),
-               ) );
+               $providers = array(
+                       '#https?://(www\.)?youtube\.com/watch.*#i'           => array( 'http://www.youtube.com/oembed',                     true  ),
+                       'http://youtu.be/*'                                  => array( 'http://www.youtube.com/oembed',                     false ),
+                       'http://blip.tv/*'                                   => array( 'http://blip.tv/oembed/',                            false ),
+                       '#https?://(www\.)?vimeo\.com/.*#i'                  => array( 'http://vimeo.com/api/oembed.{format}',              true  ),
+                       '#https?://(www\.)?dailymotion\.com/.*#i'            => array( 'http://www.dailymotion.com/services/oembed',        true  ),
+                       'http://dai.ly/*'                                    => array( 'http://www.dailymotion.com/services/oembed',        false ),
+                       '#https?://(www\.)?flickr\.com/.*#i'                 => array( 'http://www.flickr.com/services/oembed/',            true  ),
+                       'http://flic.kr/*'                                   => array( 'http://www.flickr.com/services/oembed/',            false ),
+                       '#https?://(.+\.)?smugmug\.com/.*#i'                 => array( 'http://api.smugmug.com/services/oembed/',           true  ),
+                       '#https?://(www\.)?hulu\.com/watch/.*#i'             => array( 'http://www.hulu.com/api/oembed.{format}',           true  ),
+                       '#https?://(www\.)?viddler\.com/.*#i'                => array( 'http://lab.viddler.com/services/oembed/',           true  ),
+                       'http://qik.com/*'                                   => array( 'http://qik.com/api/oembed.{format}',                false ),
+                       'http://revision3.com/*'                             => array( 'http://revision3.com/api/oembed/',                  false ),
+                       'http://i*.photobucket.com/albums/*'                 => array( 'http://photobucket.com/oembed',                     false ),
+                       'http://gi*.photobucket.com/groups/*'                => array( 'http://photobucket.com/oembed',                     false ),
+                       '#https?://(www\.)?scribd\.com/.*#i'                 => array( 'http://www.scribd.com/services/oembed',             true  ),
+                       'http://wordpress.tv/*'                              => array( 'http://wordpress.tv/oembed/',                       false ),
+                       '#https?://(.+\.)?polldaddy\.com/.*#i'               => array( 'http://polldaddy.com/oembed/',                      true  ),
+                       '#https?://(www\.)?funnyordie\.com/videos/.*#i'      => array( 'http://www.funnyordie.com/oembed',                  true  ),
+                       '#https?://(www\.)?twitter\.com/.+?/status(es)?/.*#i'=> array( 'http://api.twitter.com/1/statuses/oembed.{format}', true  ),
+                       '#https?://(www\.)?soundcloud\.com/.*#i'             => array( 'http://soundcloud.com/oembed',                      true  ),
+                       '#https?://(www\.)?slideshare\.net/*#'               => array( 'http://www.slideshare.net/api/oembed/2',            true  ),
+                       '#http://instagr(\.am|am\.com)/p/.*#i'               => array( 'http://api.instagram.com/oembed',                   true  ),
+                       '#https?://(www\.)?rdio\.com/.*#i'                   => array( 'http://www.rdio.com/api/oembed/',                   true  ),
+                       '#https?://rd\.io/x/.*#i'                            => array( 'http://www.rdio.com/api/oembed/',                   true  ),
+                       '#https?://(open|play)\.spotify\.com/.*#i'           => array( 'https://embed.spotify.com/oembed/',                 true  ),
+               );
+               /**
+                * Filter the list of oEmbed providers.
+                *
+                * Discovery is disabled for users lacking the unfiltered_html capability.
+                * Only providers in this array will be used for those users.
+                *
+                * @see wp_oembed_add_provider()
+                *
+                * @since 2.9.0
+                *
+                * @param array $providers An array of popular oEmbed providers.
+                */
+               $this->providers = apply_filters( 'oembed_providers', $providers );
 
                // Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop().
-               add_filter( 'oembed_dataparse', array(&$this, '_strip_newlines'), 10, 3 );
+               add_filter( 'oembed_dataparse', array($this, '_strip_newlines'), 10, 3 );
        }
 
        /**
@@ -74,8 +93,10 @@ class WP_oEmbed {
                        list( $providerurl, $regex ) = $data;
 
                        // Turn the asterisk-type provider URLs into regex
-                       if ( !$regex )
+                       if ( !$regex ) {
                                $matchmask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i';
+                               $matchmask = preg_replace( '|^#http\\\://|', '#https?\://', $matchmask );
+                       }
 
                        if ( preg_match( $matchmask, $url ) ) {
                                $provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML
@@ -89,6 +110,15 @@ class WP_oEmbed {
                if ( !$provider || false === $data = $this->fetch( $provider, $url, $args ) )
                        return false;
 
+               /**
+                * Filter the HTML returned by the oEmbed provider.
+                *
+                * @since 2.9.0
+                *
+                * @param string $data The returned oEmbed HTML.
+                * @param string $url  URL of the content to be embedded.
+                * @param array  $args Optional arguments, usually passed from a shortcode.
+                */
                return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args );
        }
 
@@ -102,13 +132,21 @@ class WP_oEmbed {
                $providers = array();
 
                // Fetch URL content
-               if ( $html = wp_remote_retrieve_body( wp_remote_get( $url ) ) ) {
-
-                       // <link> types that contain oEmbed provider URLs
+               if ( $html = wp_remote_retrieve_body( wp_safe_remote_get( $url ) ) ) {
+
+                       /**
+                        * Filter the link types that contain oEmbed provider URLs.
+                        *
+                        * @since 2.9.0
+                        *
+                        * @param array $format Array of oEmbed link types. Accepts 'application/json+oembed',
+                        *                      'text/xml+oembed', and 'application/xml+oembed' (incorrect,
+                        *                      used by at least Vimeo).
+                        */
                        $linktypes = apply_filters( 'oembed_linktypes', array(
                                'application/json+oembed' => 'json',
                                'text/xml+oembed' => 'xml',
-                               'application/xml+oembed' => 'xml', // Incorrect, but used by at least Vimeo
+                               'application/xml+oembed' => 'xml',
                        ) );
 
                        // Strip <body>
@@ -162,6 +200,17 @@ class WP_oEmbed {
                $provider = add_query_arg( 'maxheight', (int) $args['height'], $provider );
                $provider = add_query_arg( 'url', urlencode($url), $provider );
 
+               /**
+                * Filter the oEmbed URL to be fetched.
+                *
+                * @since 2.9.0
+                *
+                * @param string $provider URL of the oEmbed provider.
+                * @param string $url      URL of the content to be embedded.
+                * @param array  $args     Optional arguments, usually passed from a shortcode.
+                */
+               $provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args );
+
                foreach( array( 'json', 'xml' ) as $format ) {
                        $result = $this->_fetch_with_format( $provider, $format );
                        if ( is_wp_error( $result ) && 'not-implemented' == $result->get_error_code() )
@@ -182,7 +231,7 @@ class WP_oEmbed {
         */
        function _fetch_with_format( $provider_url_with_args, $format ) {
                $provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args );
-               $response = wp_remote_get( $provider_url_with_args );
+               $response = wp_safe_remote_get( $provider_url_with_args );
                if ( 501 == wp_remote_retrieve_response_code( $response ) )
                        return new WP_Error( 'not-implemented' );
                if ( ! $body = wp_remote_retrieve_body( $response ) )
@@ -208,14 +257,53 @@ class WP_oEmbed {
         * @access private
         */
        function _parse_xml( $response_body ) {
-               if ( function_exists('simplexml_load_string') ) {
-                       $errors = libxml_use_internal_errors( 'true' );
-                       $data = simplexml_load_string( $response_body );
-                       libxml_use_internal_errors( $errors );
-                       if ( is_object( $data ) )
-                               return $data;
+               if ( ! function_exists( 'libxml_disable_entity_loader' ) )
+                       return false;
+
+               $loader = libxml_disable_entity_loader( true );
+               $errors = libxml_use_internal_errors( true );
+
+               $return = $this->_parse_xml_body( $response_body );
+
+               libxml_use_internal_errors( $errors );
+               libxml_disable_entity_loader( $loader );
+
+               return $return;
+       }
+
+       /**
+        * Helper function for parsing an XML response body.
+        *
+        * @since 3.6.0
+        * @access private
+        */
+       private function _parse_xml_body( $response_body ) {
+               if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument' ) )
+                       return false;
+
+               $dom = new DOMDocument;
+               $success = $dom->loadXML( $response_body );
+               if ( ! $success )
+                       return false;
+
+               if ( isset( $dom->doctype ) )
+                       return false;
+
+               foreach ( $dom->childNodes as $child ) {
+                       if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType )
+                               return false;
                }
-               return false;
+
+               $xml = simplexml_import_dom( $dom );
+               if ( ! $xml )
+                       return false;
+
+               $return = new stdClass;
+               foreach ( $xml as $key => $value ) {
+                       $return->$key = (string) $value;
+               }
+
+               return $return;
        }
 
        /**
@@ -226,32 +314,48 @@ class WP_oEmbed {
         * @return bool|string False on error, otherwise the HTML needed to embed.
         */
        function data2html( $data, $url ) {
-               if ( !is_object($data) || empty($data->type) )
+               if ( ! is_object( $data ) || empty( $data->type ) )
                        return false;
 
+               $return = false;
+
                switch ( $data->type ) {
                        case 'photo':
-                               if ( empty($data->url) || empty($data->width) || empty($data->height) )
-                                       return false;
+                               if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) )
+                                       break;
+                               if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) )
+                                       break;
 
-                               $title = ( !empty($data->title) ) ? $data->title : '';
+                               $title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : '';
                                $return = '<a href="' . esc_url( $url ) . '"><img src="' . esc_url( $data->url ) . '" alt="' . esc_attr($title) . '" width="' . esc_attr($data->width) . '" height="' . esc_attr($data->height) . '" /></a>';
                                break;
 
                        case 'video':
                        case 'rich':
-                               $return = ( !empty($data->html) ) ? $data->html : false;
+                               if ( ! empty( $data->html ) && is_string( $data->html ) )
+                                       $return = $data->html;
                                break;
 
                        case 'link':
-                               $return = ( !empty($data->title) ) ? '<a href="' . esc_url($url) . '">' . esc_html($data->title) . '</a>' : false;
+                               if ( ! empty( $data->title ) && is_string( $data->title ) )
+                                       $return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
                                break;
 
-                       default;
+                       default:
                                $return = false;
                }
 
-               // You can use this filter to add support for custom data types or to filter the result
+               /**
+                * Filter the returned oEmbed HTML.
+                *
+                * Use this filter to add support for custom data types, or to filter the result.
+                *
+                * @since 2.9.0
+                *
+                * @param string $return The returned oEmbed HTML.
+                * @param object $data   A data object result from an oEmbed provider.
+                * @param string $url    The URL of the content to be embedded.
+                */
                return apply_filters( 'oembed_dataparse', $return, $data, $url );
        }
 
@@ -283,7 +387,7 @@ class WP_oEmbed {
  *
  * @return WP_oEmbed object.
  */
-function &_wp_oembed_get_object() {
+function _wp_oembed_get_object() {
        static $wp_oembed;
 
        if ( is_null($wp_oembed) )
@@ -291,5 +395,3 @@ function &_wp_oembed_get_object() {
 
        return $wp_oembed;
 }
-
-?>
\ No newline at end of file