--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-includes/class-oembed.php Tue Feb 02 15:44:16 2010 +0000
@@ -0,0 +1,270 @@
+<?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();
+
+ /**
+ * PHP4 constructor
+ */
+ function WP_oEmbed() {
+ return $this->__construct();
+ }
+
+ /**
+ * PHP5 constructor
+ *
+ * @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).
+ $this->providers = apply_filters( 'oembed_providers', array(
+ '#http://(www\.)?youtube.com/watch.*#i' => array( 'http://www.youtube.com/oembed', true ),
+ 'http://blip.tv/file/*' => array( 'http://blip.tv/oembed/', false ),
+ '#http://(www\.)?vimeo\.com/.*#i' => array( 'http://www.vimeo.com/api/oembed.{format}', true ),
+ '#http://(www\.)?dailymotion\.com/.*#i' => array( 'http://www.dailymotion.com/api/oembed', true ),
+ '#http://(www\.)?flickr\.com/.*#i' => array( 'http://www.flickr.com/services/oembed/', true ),
+ '#http://(www\.)?hulu\.com/watch/.*#i' => array( 'http://www.hulu.com/api/oembed.{format}', true ),
+ '#http://(www\.)?viddler\.com/.*#i' => array( 'http://lab.viddler.com/services/oembed/', true ),
+ 'http://qik.com/*' => array( 'http://qik.com/api/oembed.{format}', false ),
+ 'http://revision3.com/*' => array( 'http://revision3.com/api/oembed/', false ),
+ 'http://i*.photobucket.com/albums/*' => array( 'http://photobucket.com/oembed', false ),
+ 'http://gi*.photobucket.com/groups/*' => array( 'http://photobucket.com/oembed', false ),
+ '#http://(www\.)?scribd\.com/.*#i' => array( 'http://www.scribd.com/services/oembed', true ),
+ 'http://wordpress.tv/*' => array( 'http://wordpress.tv/oembed/', false ),
+ ) );
+
+ // Fix Scribd embeds. They contain new lines in the middle of the HTML which breaks wpautop().
+ add_filter( 'oembed_dataparse', array(&$this, 'strip_scribd_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';
+
+ 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;
+
+ 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_remote_get( $url ) ) ) {
+
+ // <link> types that contain oEmbed provider URLs
+ $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
+ ) );
+
+ // 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( 'format', 'json', $provider ); // JSON is easier to deal with than XML
+
+ $provider = add_query_arg( 'maxwidth', $args['width'], $provider );
+ $provider = add_query_arg( 'maxheight', $args['height'], $provider );
+ $provider = add_query_arg( 'url', urlencode($url), $provider );
+
+ if ( !$result = wp_remote_retrieve_body( wp_remote_get( $provider ) ) )
+ return false;
+
+ $result = trim( $result );
+
+ // JSON?
+ // Example content: http://vimeo.com/api/oembed.json?url=http%3A%2F%2Fvimeo.com%2F240975
+ if ( $data = json_decode($result) ) {
+ return $data;
+ }
+
+ // Must be XML. Only parse it if PHP5 is installed. (PHP4 isn't worth the trouble.)
+ // Example content: http://vimeo.com/api/oembed.xml?url=http%3A%2F%2Fvimeo.com%2F240975
+ elseif ( function_exists('simplexml_load_string') ) {
+ $errors = libxml_use_internal_errors( 'true' );
+
+ $data = simplexml_load_string( $result );
+
+ libxml_use_internal_errors( $errors );
+
+ if ( is_object($data) )
+ return $data;
+ }
+
+ return false;
+ }
+
+ /**
+ * 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;
+
+ switch ( $data->type ) {
+ case 'photo':
+ if ( empty($data->url) || empty($data->width) || empty($data->height) )
+ return false;
+
+ $title = ( !empty($data->title) ) ? $data->title : '';
+ $return = '<img src="' . esc_attr( clean_url( $data->url ) ) . '" alt="' . esc_attr($title) . '" width="' . esc_attr($data->width) . '" height="' . esc_attr($data->height) . '" />';
+ break;
+
+ case 'video':
+ case 'rich':
+ $return = ( !empty($data->html) ) ? $data->html : false;
+ break;
+
+ case 'link':
+ $return = ( !empty($data->title) ) ? '<a href="' . clean_url($url) . '">' . esc_html($data->title) . '</a>' : false;
+ break;
+
+ default;
+ $return = false;
+ }
+
+ // You can use this filter to add support for custom data types or to filter the result
+ return apply_filters( 'oembed_dataparse', $return, $data, $url );
+ }
+
+ /**
+ * Strip new lines from the HTML if it's a Scribd embed.
+ *
+ * @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_scribd_newlines( $html, $data, $url ) {
+ if ( preg_match( '#http://(www\.)?scribd.com/.*#i', $url ) )
+ $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;
+}
+
+?>
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