Adding plugin oembed-provider

wp-content/plugins/oembed-provider/oembed-provider.php

+<?php
+/*
+Plugin Name: oEmbed Provider
+Plugin URI: http://wordpress.org/extend/plugins/oembed-provider/
+Description: An oEmbed provider for Wordpress
+Version: 1.1
+Author: Craig Andrews <candrews@integralblue.com>
+Author URI: http://candrews.integralblue.com
+*/
+
+/*
+    Copyright 2009  Craig Andrews  (candrews@integralblue.com)
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+if(function_exists('add_action')){
+    // Running inside of Wordpress
+    add_action('wp_head', 'add_oembed_links');
+    
+    function add_oembed_links(){
+        if(is_single() || is_page() || is_attachment()){
+            print '<link rel="alternate" type="application/json+oembed" href="' . plugins_url('oembed-provider/oembed-provider.php') . '?format=json&url=' . urlencode(get_permalink())  . '" />';
+            print '<link rel="alternate" type="application/xml+oembed" href="' . plugins_url('oembed-provider/oembed-provider.php') . '?format=xml&url=' . urlencode(get_permalink())  . '" />';
+        }
+    }
+}else{
+    //Directly called (not by Wordpress)
+    require('../../../wp-load.php');
+    
+    $url = $_GET['url'];
+    $post_ID = url_to_postid($url);
+    $post=get_post($post_ID);
+    if(empty($post)){
+        header('Status: 404');
+        die("Not found");
+    }else{
+        $author = get_userdata($post->post_author);
+        $oembed=array();
+        $oembed['version']='1.0';
+        $oembed['provider_name']=get_option('blogname');
+        $oembed['provider_url']=get_option('home');
+        $oembed['author_name']=$author->display_name;
+        $oembed['author_url']=get_author_posts_url($author->ID, $author->nicename);
+        $oembed['title']=$post->post_title;
+        switch(get_post_type($post)){
+            case 'attachment':
+                if(substr($post->post_mime_type,0,strlen('image/'))=='image/'){
+                    $oembed['type']='photo';
+                }else{
+                    $oembed['type']='link';
+                }
+                $oembed['url']=wp_get_attachment_url($post->ID);
+                break;
+            case 'post':
+            case 'page':
+                $oembed['type']='link';
+                $oembed['html']=empty($post->post_excerpt)?$post->post_content:$post->post_excerpt;
+                break;
+            default:
+                header('Status: 501');
+                die('oEmbed not supported for posts of type \'' . $post->type . '\'');
+                break;
+        }
+
+        $format = $_GET['format'];
+        switch($format){
+            case 'json':
+                header('Content-Type: application/json; charset=' . get_option('blog_charset'), true);
+                $callback = $_GET['callback'];
+                if($callback){
+                    print $callback . '(';
+                }
+                print(json_encode($oembed));
+                if($callback){
+                    print ')';
+                }
+                break;
+            case 'xml':
+                header('Content-Type: text/xml; charset=' . get_option('blog_charset'), true);
+                print '<?xml version="1.0" encoding="' . get_option('blog_charset') . '" standalone="yes"?>';
+                print '<oembed>';
+                foreach(array_keys($oembed) as $element){
+                    print '<' . $element . '><![CDATA[' . $oembed[$element] . ']]></' . $element . '>';
+                }
+                print '</oembed>';
+                break;
+            default:
+                header('Status: 501');
+                die('Format \'' . $format . '\' not supported');
+        }
+    }
+}
+?>

wp-content/plugins/oembed-provider/readme.txt

+=== oEmbed Provider ===
+Contributors: candrews
+Donate link: http://candrews.integralblue.com/
+Tags: oembed, links
+Requires at least: 2.8.0
+Tested up to: 2.8.2
+Stable tag: 1.1
+
+An oEmbed provider for Wordpress.
+
+== Description ==
+
+The oEmbed provider plugin makes Wordpress an oEmbed provider, compliant with the XML and JSON specification at http://www.oembed.com.
+
+oEmbed is a powerful protocol that allows sites to automatically embed content from 3rd parties directly into their site in whatever way they choose. For example, if a user on http://identi.ca links to a Wordpress blog with this plugin enabled, the link, when clicked, will show an excerpt from the blog post, the authors name, and various links... automatically.
+
+== Installation ==
+
+1. Upload the plugin to `oembed-provider.php` in the `/wp-content/plugins/oembed-provider/` directory
+1. Activate the plugin through the 'Plugins' menu in WordPress
+1. Step 3? There is no step 3!
+
+== Frequently Asked Questions ==
+
+= Is it really that easy to install this plugin? =
+
+Yes!
+
+== Changelog ==
+
+= 1.1 =
+* Added callback parameter for JSON-P
+
+= 1.0 =
+* Initial release