--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/class-oembed.php Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,397 @@
+<?php
+/**
+ * API for fetching the HTML to embed remote content based on a provided URL.
+ * Used internally by the {@link WP_Embed} class, but is designed to be generic.
+ *
+ * @link http://codex.wordpress.org/oEmbed oEmbed Codex Article
+ * @link http://oembed.com/ oEmbed Homepage
+ *
+ * @package WordPress
+ * @subpackage oEmbed
+ */
+
+/**
+ * oEmbed class.
+ *
+ * @package WordPress
+ * @subpackage oEmbed
+ * @since 2.9.0
+ */
+class WP_oEmbed {
+ var $providers = array();
+
+ /**
+ * Constructor
+ *
+ * @uses apply_filters() Filters a list of pre-defined oEmbed providers.
+ */
+ function __construct() {
+ $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 );
+ }
+
+ /**
+ * The do-it-all function that takes a URL and attempts to return the HTML.
+ *
+ * @see WP_oEmbed::discover()
+ * @see WP_oEmbed::fetch()
+ * @see WP_oEmbed::data2html()
+ *
+ * @param string $url The URL to the content that should be attempted to be embedded.
+ * @param array $args Optional arguments. Usually passed from a shortcode.
+ * @return bool|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
+ */
+ function get_html( $url, $args = '' ) {
+ $provider = false;
+
+ if ( !isset($args['discover']) )
+ $args['discover'] = true;
+
+ foreach ( $this->providers as $matchmask => $data ) {
+ list( $providerurl, $regex ) = $data;
+
+ // Turn the asterisk-type provider URLs into regex
+ if ( !$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', $providerurl ); // JSON is easier to deal with than XML
+ break;
+ }
+ }
+
+ if ( !$provider && $args['discover'] )
+ $provider = $this->discover( $url );
+
+ if ( !$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 );
+ }
+
+ /**
+ * Attempts to find oEmbed provider discovery <link> tags at the given URL.
+ *
+ * @param string $url The URL that should be inspected for discovery <link> tags.
+ * @return bool|string False on failure, otherwise the oEmbed provider URL.
+ */
+ function discover( $url ) {
+ $providers = array();
+
+ // Fetch URL content
+ 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',
+ ) );
+
+ // Strip <body>
+ $html = substr( $html, 0, stripos( $html, '</head>' ) );
+
+ // Do a quick check
+ $tagfound = false;
+ foreach ( $linktypes as $linktype => $format ) {
+ if ( stripos($html, $linktype) ) {
+ $tagfound = true;
+ break;
+ }
+ }
+
+ if ( $tagfound && preg_match_all( '/<link([^<>]+)>/i', $html, $links ) ) {
+ foreach ( $links[1] as $link ) {
+ $atts = shortcode_parse_atts( $link );
+
+ if ( !empty($atts['type']) && !empty($linktypes[$atts['type']]) && !empty($atts['href']) ) {
+ $providers[$linktypes[$atts['type']]] = $atts['href'];
+
+ // Stop here if it's JSON (that's all we need)
+ if ( 'json' == $linktypes[$atts['type']] )
+ break;
+ }
+ }
+ }
+ }
+
+ // JSON is preferred to XML
+ if ( !empty($providers['json']) )
+ return $providers['json'];
+ elseif ( !empty($providers['xml']) )
+ return $providers['xml'];
+ else
+ return false;
+ }
+
+ /**
+ * Connects to a oEmbed provider and returns the result.
+ *
+ * @param string $provider The URL to the oEmbed provider.
+ * @param string $url The URL to the content that is desired to be embedded.
+ * @param array $args Optional arguments. Usually passed from a shortcode.
+ * @return bool|object False on failure, otherwise the result in the form of an object.
+ */
+ function fetch( $provider, $url, $args = '' ) {
+ $args = wp_parse_args( $args, wp_embed_defaults() );
+
+ $provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider );
+ $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() )
+ continue;
+ return ( $result && ! is_wp_error( $result ) ) ? $result : false;
+ }
+ return false;
+ }
+
+ /**
+ * Fetches result from an oEmbed provider for a specific format and complete provider URL
+ *
+ * @since 3.0.0
+ * @access private
+ * @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.)
+ * @param string $format Format to use
+ * @return bool|object False on failure, otherwise the result in the form of an object.
+ */
+ function _fetch_with_format( $provider_url_with_args, $format ) {
+ $provider_url_with_args = add_query_arg( 'format', $format, $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 ) )
+ return false;
+ $parse_method = "_parse_$format";
+ return $this->$parse_method( $body );
+ }
+
+ /**
+ * Parses a json response body.
+ *
+ * @since 3.0.0
+ * @access private
+ */
+ function _parse_json( $response_body ) {
+ return ( ( $data = json_decode( trim( $response_body ) ) ) && is_object( $data ) ) ? $data : false;
+ }
+
+ /**
+ * Parses an XML response body.
+ *
+ * @since 3.0.0
+ * @access private
+ */
+ function _parse_xml( $response_body ) {
+ 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;
+ }
+
+ $xml = simplexml_import_dom( $dom );
+ if ( ! $xml )
+ return false;
+
+ $return = new stdClass;
+ foreach ( $xml as $key => $value ) {
+ $return->$key = (string) $value;
+ }
+
+ return $return;
+ }
+
+ /**
+ * Converts a data object from {@link WP_oEmbed::fetch()} and returns the HTML.
+ *
+ * @param object $data A data object result from an oEmbed provider.
+ * @param string $url The URL to the content that is desired to be embedded.
+ * @return bool|string False on error, otherwise the HTML needed to embed.
+ */
+ function data2html( $data, $url ) {
+ 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 ) )
+ break;
+ if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) )
+ break;
+
+ $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':
+ if ( ! empty( $data->html ) && is_string( $data->html ) )
+ $return = $data->html;
+ break;
+
+ case 'link':
+ if ( ! empty( $data->title ) && is_string( $data->title ) )
+ $return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
+ break;
+
+ default:
+ $return = false;
+ }
+
+ /**
+ * 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 );
+ }
+
+ /**
+ * Strip any new lines from the HTML.
+ *
+ * @access private
+ * @param string $html Existing HTML.
+ * @param object $data Data object from WP_oEmbed::data2html()
+ * @param string $url The original URL passed to oEmbed.
+ * @return string Possibly modified $html
+ */
+ function _strip_newlines( $html, $data, $url ) {
+ if ( false !== strpos( $html, "\n" ) )
+ $html = str_replace( array( "\r\n", "\n" ), '', $html );
+
+ return $html;
+ }
+}
+
+/**
+ * Returns the initialized {@link WP_oEmbed} object
+ *
+ * @since 2.9.0
+ * @access private
+ *
+ * @see WP_oEmbed
+ * @uses WP_oEmbed
+ *
+ * @return WP_oEmbed object.
+ */
+function _wp_oembed_get_object() {
+ static $wp_oembed;
+
+ if ( is_null($wp_oembed) )
+ $wp_oembed = new WP_oEmbed();
+
+ return $wp_oembed;
+}