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class-wp-atom-server.php
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<?php
/**
* WordPress AtomPub API implementation.
*
* @package WordPress
* @subpackage Publishing
* @since 2.2.0
*/
class wp_atom_server {
/**
* ATOM content type.
*
* @since 2.2.0
* @var string
*/
var $ATOM_CONTENT_TYPE = 'application/atom+xml';
/**
* Categories ATOM content type.
*
* @since 2.2.0
* @var string
*/
var $CATEGORIES_CONTENT_TYPE = 'application/atomcat+xml';
/**
* Service ATOM content type.
*
* @since 2.3.0
* @var string
*/
var $SERVICE_CONTENT_TYPE = 'application/atomsvc+xml';
/**
* ATOM XML namespace.
*
* @since 2.3.0
* @var string
*/
var $ATOM_NS = 'http://www.w3.org/2005/Atom';
/**
* ATOMPUB XML namespace.
*
* @since 2.3.0
* @var string
*/
var $ATOMPUB_NS = 'http://www.w3.org/2007/app';
/**
* Entries path.
*
* @since 2.2.0
* @var string
*/
var $ENTRIES_PATH = "posts";
/**
* Categories path.
*
* @since 2.2.0
* @var string
*/
var $CATEGORIES_PATH = "categories";
/**
* Media path.
*
* @since 2.2.0
* @var string
*/
var $MEDIA_PATH = "attachments";
/**
* Entry path.
*
* @since 2.2.0
* @var string
*/
var $ENTRY_PATH = "post";
/**
* Service path.
*
* @since 2.2.0
* @var string
*/
var $SERVICE_PATH = "service";
/**
* Media single path.
*
* @since 2.2.0
* @var string
*/
var $MEDIA_SINGLE_PATH = "attachment";
/**
* ATOMPUB parameters.
*
* @since 2.2.0
* @var array
*/
var $params = array();
/**
* Supported ATOMPUB media types.
*
* @since 2.3.0
* @var array
*/
var $media_content_types = array('image/*','audio/*','video/*');
/**
* ATOMPUB content type(s).
*
* @since 2.2.0
* @var array
*/
var $atom_content_types = array('application/atom+xml');
/**
* ATOMPUB methods.
*
* @since 2.2.0
* @var unknown_type
*/
var $selectors = array();
/**
* Whether to do output.
*
* Support for head.
*
* @since 2.2.0
* @var bool
*/
var $do_output = true;
/**
* Constructor - Sets up object properties.
*
* @since 2.2.0
* @return AtomServer
*/
function __construct() {
$var_by_ref = explode( '/', $_SERVER['SCRIPT_NAME'] );
$this->script_name = array_pop( $var_by_ref );
$this->app_base = site_url( $this->script_name . '/' );
$this->selectors = array(
'@/service$@' =>
array('GET' => 'get_service'),
'@/categories$@' =>
array('GET' => 'get_categories_xml'),
'@/post/(\d+)$@' =>
array('GET' => 'get_post',
'PUT' => 'put_post',
'DELETE' => 'delete_post'),
'@/posts/?(\d+)?$@' =>
array('GET' => 'get_posts',
'POST' => 'create_post'),
'@/attachments/?(\d+)?$@' =>
array('GET' => 'get_attachment',
'POST' => 'create_attachment'),
'@/attachment/file/(\d+)$@' =>
array('GET' => 'get_file',
'PUT' => 'put_file',
'DELETE' => 'delete_file'),
'@/attachment/(\d+)$@' =>
array('GET' => 'get_attachment',
'PUT' => 'put_attachment',
'DELETE' => 'delete_attachment'),
);
}
/**
* Handle ATOMPUB request.
*
* @since 2.2.0
*/
function handle_request() {
if ( !empty( $_SERVER['ORIG_PATH_INFO'] ) )
$path = $_SERVER['ORIG_PATH_INFO'];
else
$path = $_SERVER['PATH_INFO'];
$method = $_SERVER['REQUEST_METHOD'];
$this->process_conditionals();
//$this->process_conditionals();
// exception case for HEAD (treat exactly as GET, but don't output)
if ($method == 'HEAD') {
$this->do_output = false;
$method = 'GET';
}
// redirect to /service in case no path is found.
if (strlen($path) == 0 || $path == '/')
$this->redirect($this->get_service_url());
// check to see if AtomPub is enabled
if ( !get_option( 'enable_app' ) )
$this->forbidden( sprintf( __( 'AtomPub services are disabled on this site. An admin user can enable them at %s' ), admin_url('options-writing.php') ) );
// dispatch
foreach ( $this->selectors as $regex => $funcs ) {
if ( preg_match($regex, $path, $matches) ) {
if ( isset($funcs[$method]) ) {
// authenticate regardless of the operation and set the current
// user. each handler will decide if auth is required or not.
if ( !$this->authenticate() ) {
$this->auth_required('Credentials required.');
}
array_shift($matches);
call_user_func_array(array($this,$funcs[$method]), $matches);
wp_die();
} else {
// only allow what we have handlers for...
$this->not_allowed(array_keys($funcs));
}
}
}
// oops, nothing found
$this->not_found();
}
/**
* Retrieve XML for ATOMPUB service.
*
* @since 2.2.0
*/
function get_service() {
if ( !current_user_can( 'edit_posts' ) )
$this->auth_required( __( 'Sorry, you do not have the right to access this site.' ) );
$entries_url = esc_attr($this->get_entries_url());
$categories_url = esc_attr($this->get_categories_url());
$media_url = esc_attr($this->get_attachments_url());
$accepted_media_types = '';
foreach ($this->media_content_types as $med) {
$accepted_media_types = $accepted_media_types . "<accept>" . $med . "</accept>";
}
$atom_prefix="atom";
$atom_blogname = get_bloginfo('name');
$service_doc = <<<EOD
<service xmlns="$this->ATOMPUB_NS" xmlns:$atom_prefix="$this->ATOM_NS">
<workspace>
<$atom_prefix:title>$atom_blogname Workspace</$atom_prefix:title>
<collection href="$entries_url">
<$atom_prefix:title>$atom_blogname Posts</$atom_prefix:title>
<accept>$this->ATOM_CONTENT_TYPE;type=entry</accept>
<categories href="$categories_url" />
</collection>
<collection href="$media_url">
<$atom_prefix:title>$atom_blogname Media</$atom_prefix:title>
$accepted_media_types
</collection>
</workspace>
</service>
EOD;
$this->output($service_doc, $this->SERVICE_CONTENT_TYPE);
}
/**
* Retrieve categories list in XML format.
*
* @since 2.2.0
*/
function get_categories_xml() {
if ( !current_user_can( 'edit_posts' ) )
$this->auth_required( __( 'Sorry, you do not have the right to access this site.' ) );
$home = esc_attr(get_bloginfo_rss('url'));
$categories = "";
$cats = get_categories(array('hierarchical' => 0, 'hide_empty' => 0));
foreach ( (array) $cats as $cat ) {
$categories .= " <category term=\"" . esc_attr($cat->name) . "\" />\n";
}
$output = <<<EOD
<app:categories xmlns:app="$this->ATOMPUB_NS"
xmlns="$this->ATOM_NS"
fixed="yes" scheme="$home">
$categories
</app:categories>
EOD;
$this->output($output, $this->CATEGORIES_CONTENT_TYPE);
}
/**
* Create new post.
*
* @since 2.2.0
*/
function create_post() {
global $user_ID;
$this->get_accepted_content_type($this->atom_content_types);
$parser = new AtomParser();
if ( !$parser->parse() )
$this->client_error();
$entry = array_pop($parser->feed->entries);
$catnames = array();
if ( !empty( $entry->categories ) ) {
foreach ( $entry->categories as $cat ) {
array_push($catnames, $cat["term"]);
}
}
$wp_cats = get_categories(array('hide_empty' => false));
$post_category = array();
foreach ( $wp_cats as $cat ) {
if ( in_array($cat->name, $catnames) )
array_push($post_category, $cat->term_id);
}
$publish = ! ( isset( $entry->draft ) && 'yes' == trim( $entry->draft ) );
$cap = ($publish) ? 'publish_posts' : 'edit_posts';
if ( !current_user_can($cap) )
$this->auth_required(__('Sorry, you do not have the right to edit/publish new posts.'));
$blog_ID = get_current_blog_id();
$post_status = ($publish) ? 'publish' : 'draft';
$post_author = (int) $user_ID;
$post_title = '';
$post_content = '';
$post_excerpt = '';
$pubtimes = '';
if ( isset( $entry->title ) && is_array( $entry->title ) && !empty( $entry->title[1] ) )
$post_title = (string) $entry->title[1];
if ( isset( $entry->content ) && is_array( $entry->content ) && !empty( $entry->content[1] ) )
$post_content = (string) $entry->content[1];
if ( isset( $entry->summary ) && is_array( $entry->summary ) && !empty( $entry->summary[1] ) )
$post_excerpt = (string) $entry->summary[1];
if ( !empty( $entry->published ) )
$pubtimes = (string) $entry->published;
$pubtimes = $this->get_publish_time( $pubtimes );
$post_date = $pubtimes[0];
$post_date_gmt = $pubtimes[1];
if ( isset( $_SERVER['HTTP_SLUG'] ) )
$post_name = $_SERVER['HTTP_SLUG'];
$post_data = compact('blog_ID', 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_category', 'post_status', 'post_excerpt', 'post_name');
$this->escape($post_data);
$postID = wp_insert_post($post_data);
if ( is_wp_error( $postID ) )
$this->internal_error($postID->get_error_message());
if ( !$postID )
$this->internal_error(__('Sorry, your entry could not be posted. Something wrong happened.'));
// getting warning here about unable to set headers
// because something in the cache is printing to the buffer
// could we clean up wp_set_post_categories or cache to not print
// this could affect our ability to send back the right headers
@wp_set_post_categories($postID, $post_category);
do_action( 'atompub_create_post', $postID, $entry );
$output = $this->get_entry($postID);
$this->created($postID, $output);
}
/**
* Retrieve post.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function get_post($postID) {
global $entry;
if ( !current_user_can( 'edit_post', $postID ) )
$this->auth_required( __( 'Sorry, you do not have the right to access this post.' ) );
$this->set_current_entry($postID);
$output = $this->get_entry($postID);
$this->output($output);
}
/**
* Update post.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function put_post($postID) {
// checked for valid content-types (atom+xml)
// quick check and exit
$this->get_accepted_content_type($this->atom_content_types);
$parser = new AtomParser();
if ( !$parser->parse() )
$this->bad_request();
$parsed = array_pop($parser->feed->entries);
// check for not found
global $entry;
$this->set_current_entry($postID);
if ( !current_user_can('edit_post', $entry['ID']) )
$this->auth_required(__('Sorry, you do not have the right to edit this post.'));
$publish = ! ( isset($parsed->draft) && 'yes' == trim($parsed->draft) );
$post_status = ($publish) ? 'publish' : 'draft';
extract($entry);
$post_title = $parsed->title[1];
$post_content = $parsed->content[1];
$post_excerpt = $parsed->summary[1];
$pubtimes = $this->get_publish_time($entry->published);
$post_date = $pubtimes[0];
$post_date_gmt = $pubtimes[1];
$pubtimes = $this->get_publish_time($parsed->updated);
$post_modified = $pubtimes[0];
$post_modified_gmt = $pubtimes[1];
$postdata = compact('ID', 'post_content', 'post_title', 'post_category', 'post_status', 'post_excerpt', 'post_date', 'post_date_gmt', 'post_modified', 'post_modified_gmt');
$this->escape($postdata);
$result = wp_update_post($postdata);
if ( !$result )
$this->internal_error(__('For some strange yet very annoying reason, this post could not be edited.'));
do_action( 'atompub_put_post', $ID, $parsed );
$this->ok();
}
/**
* Remove post.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function delete_post($postID) {
// check for not found
global $entry;
$this->set_current_entry($postID);
if ( !current_user_can('edit_post', $postID) )
$this->auth_required(__('Sorry, you do not have the right to delete this post.'));
if ( $entry['post_type'] == 'attachment' ) {
$this->delete_attachment($postID);
} else {
$result = wp_delete_post($postID);
if ( !$result ) {
$this->internal_error(__('For some strange yet very annoying reason, this post could not be deleted.'));
}
$this->ok();
}
}
/**
* Retrieve attachment.
*
* @since 2.2.0
*
* @param int $postID Optional. Post ID.
*/
function get_attachment($postID = null) {
if ( !current_user_can( 'upload_files' ) )
$this->auth_required( __( 'You do not have permission to upload files.' ) );
if ( !isset($postID) ) {
$this->get_attachments();
} else {
$this->set_current_entry($postID);
$output = $this->get_entry($postID, 'attachment');
$this->output($output);
}
}
/**
* Create new attachment.
*
* @since 2.2.0
*/
function create_attachment() {
$type = $this->get_accepted_content_type();
if ( !current_user_can('upload_files') )
$this->auth_required( __( 'You do not have permission to upload files.' ) );
$fp = fopen("php://input", "rb");
$bits = null;
while ( !feof($fp) ) {
$bits .= fread($fp, 4096);
}
fclose($fp);
$slug = '';
if ( isset( $_SERVER['HTTP_SLUG'] ) )
$slug = $_SERVER['HTTP_SLUG'];
elseif ( isset( $_SERVER['HTTP_TITLE'] ) )
$slug = $_SERVER['HTTP_TITLE'];
elseif ( empty( $slug ) ) // just make a random name
$slug = substr( md5( uniqid( microtime() ) ), 0, 7);
$ext = preg_replace( '|.*/([a-z0-9]+)|', '$1', $_SERVER['CONTENT_TYPE'] );
$slug = sanitize_file_name( "$slug.$ext" );
$file = wp_upload_bits( $slug, null, $bits);
$url = $file['url'];
$file = $file['file'];
do_action('wp_create_file_in_uploads', $file); // replicate
// Construct the attachment array
$attachment = array(
'post_title' => $slug,
'post_content' => $slug,
'post_status' => 'attachment',
'post_parent' => 0,
'post_mime_type' => $type,
'guid' => $url
);
// Save the data
$postID = wp_insert_attachment($attachment, $file);
if (!$postID)
$this->internal_error(__('Sorry, your entry could not be posted. Something wrong happened.'));
$output = $this->get_entry($postID, 'attachment');
$this->created($postID, $output, 'attachment');
}
/**
* Update attachment.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function put_attachment($postID) {
// checked for valid content-types (atom+xml)
// quick check and exit
$this->get_accepted_content_type($this->atom_content_types);
$parser = new AtomParser();
if (!$parser->parse()) {
$this->bad_request();
}
$parsed = array_pop($parser->feed->entries);
// check for not found
global $entry;
$this->set_current_entry($postID);
if ( !current_user_can('edit_post', $entry['ID']) )
$this->auth_required(__('Sorry, you do not have the right to edit this post.'));
extract($entry);
$post_title = $parsed->title[1];
$post_content = $parsed->summary[1];
$pubtimes = $this->get_publish_time($parsed->updated);
$post_modified = $pubtimes[0];
$post_modified_gmt = $pubtimes[1];
$postdata = compact('ID', 'post_content', 'post_title', 'post_category', 'post_status', 'post_excerpt', 'post_modified', 'post_modified_gmt');
$this->escape($postdata);
$result = wp_update_post($postdata);
if ( !$result )
$this->internal_error(__('For some strange yet very annoying reason, this post could not be edited.'));
$this->ok();
}
/**
* Remove attachment.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function delete_attachment($postID) {
// check for not found
global $entry;
$this->set_current_entry($postID);
if ( !current_user_can('edit_post', $postID) )
$this->auth_required(__('Sorry, you do not have the right to delete this post.'));
$location = get_post_meta($entry['ID'], '_wp_attached_file', true);
$filetype = wp_check_filetype($location);
if ( !isset($location) || 'attachment' != $entry['post_type'] || empty($filetype['ext']) )
$this->internal_error(__('Error occurred while accessing post metadata for file location.'));
// delete file
@unlink($location);
// delete attachment
$result = wp_delete_post($postID);
if ( !$result )
$this->internal_error(__('For some strange yet very annoying reason, this post could not be deleted.'));
$this->ok();
}
/**
* Retrieve attachment from post.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function get_file($postID) {
// check for not found
global $entry;
$this->set_current_entry($postID);
// then whether user can edit the specific post
if ( !current_user_can('edit_post', $postID) )
$this->auth_required(__('Sorry, you do not have the right to edit this post.'));
$location = get_post_meta($entry['ID'], '_wp_attached_file', true);
$location = get_option ('upload_path') . '/' . $location;
$filetype = wp_check_filetype($location);
if ( !isset($location) || 'attachment' != $entry['post_type'] || empty($filetype['ext']) )
$this->internal_error(__('Error occurred while accessing post metadata for file location.'));
status_header('200');
header('Content-Type: ' . $entry['post_mime_type']);
header('Connection: close');
if ( $fp = fopen($location, "rb") ) {
status_header('200');
header('Content-Type: ' . $entry['post_mime_type']);
header('Connection: close');
while ( !feof($fp) ) {
echo fread($fp, 4096);
}
fclose($fp);
} else {
status_header ('404');
}
wp_die();
}
/**
* Upload file to blog and add attachment to post.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function put_file($postID) {
// first check if user can upload
if ( !current_user_can('upload_files') )
$this->auth_required(__('You do not have permission to upload files.'));
// check for not found
global $entry;
$this->set_current_entry($postID);
// then whether user can edit the specific post
if ( !current_user_can('edit_post', $postID) )
$this->auth_required(__('Sorry, you do not have the right to edit this post.'));
$upload_dir = wp_upload_dir( );
$location = get_post_meta($entry['ID'], '_wp_attached_file', true);
$filetype = wp_check_filetype($location);
$location = "{$upload_dir['basedir']}/{$location}";
if (!isset($location) || 'attachment' != $entry['post_type'] || empty($filetype['ext']))
$this->internal_error(__('Error occurred while accessing post metadata for file location.'));
$fp = fopen("php://input", "rb");
$localfp = fopen($location, "w+");
while ( !feof($fp) ) {
fwrite($localfp,fread($fp, 4096));
}
fclose($fp);
fclose($localfp);
$ID = $entry['ID'];
$pubtimes = $this->get_publish_time($entry->published);
$post_date = $pubtimes[0];
$post_date_gmt = $pubtimes[1];
$pubtimes = $this->get_publish_time($parsed->updated);
$post_modified = $pubtimes[0];
$post_modified_gmt = $pubtimes[1];
$post_data = compact('ID', 'post_date', 'post_date_gmt', 'post_modified', 'post_modified_gmt');
$result = wp_update_post($post_data);
if ( !$result )
$this->internal_error(__('Sorry, your entry could not be posted. Something wrong happened.'));
wp_update_attachment_metadata( $postID, wp_generate_attachment_metadata( $postID, $location ) );
$this->ok();
}
/**
* Retrieve entries URL.
*
* @since 2.2.0
*
* @param int $page Page ID.
* @return string
*/
function get_entries_url($page = null) {
if ( isset($GLOBALS['post_type']) && ( $GLOBALS['post_type'] == 'attachment' ) )
$path = $this->MEDIA_PATH;
else
$path = $this->ENTRIES_PATH;
$url = $this->app_base . $path;
if ( isset($page) && is_int($page) )
$url .= "/$page";
return $url;
}
/**
* Display entries URL.
*
* @since 2.2.0
*
* @param int $page Page ID.
*/
function the_entries_url($page = null) {
echo $this->get_entries_url($page);
}
/**
* Retrieve categories URL.
*
* @since 2.2.0
*
* @param mixed $deprecated Not used.
* @return string
*/
function get_categories_url($deprecated = '') {
if ( !empty( $deprecated ) )
_deprecated_argument( __FUNCTION__, '2.5' );
return $this->app_base . $this->CATEGORIES_PATH;
}
/**
* Display category URL.
*
* @since 2.2.0
*/
function the_categories_url() {
echo $this->get_categories_url();
}
/**
* Retrieve attachment URL.
*
* @since 2.2.0
*
* @param int $page Page ID.
* @return string
*/
function get_attachments_url($page = null) {
$url = $this->app_base . $this->MEDIA_PATH;
if (isset($page) && is_int($page)) {
$url .= "/$page";
}
return $url;
}
/**
* Display attachment URL.
*
* @since 2.2.0
*
* @param int $page Page ID.
*/
function the_attachments_url($page = null) {
echo $this->get_attachments_url($page);
}
/**
* Retrieve service URL.
*
* @since 2.3.0
*
* @return string
*/
function get_service_url() {
return $this->app_base . $this->SERVICE_PATH;
}
/**
* Retrieve entry URL.
*
* @since 2.7.0
*
* @param int $postID Post ID.
* @return string
*/
function get_entry_url($postID = null) {
if (!isset($postID)) {
global $post;
$postID = (int) $post->ID;
}
$url = $this->app_base . $this->ENTRY_PATH . "/$postID";
return $url;
}
/**
* Display entry URL.
*
* @since 2.7.0
*
* @param int $postID Post ID.
*/
function the_entry_url($postID = null) {
echo $this->get_entry_url($postID);
}
/**
* Retrieve media URL.
*
* @since 2.2.0
*
* @param int $postID Post ID.
* @return string
*/
function get_media_url($postID = null) {
if (!isset($postID)) {
global $post;
$postID = (int) $post->ID;
}
$url = $this->app_base . $this->MEDIA_SINGLE_PATH ."/file/$postID";
return $url;
}
/**
* Display the media URL.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function the_media_url($postID = null) {
echo $this->get_media_url($postID);
}
/**
* Set the current entry to post ID.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function set_current_entry($postID) {
global $entry;
if (!isset($postID)) {
// $this->bad_request();
$this->not_found();
}
$entry = wp_get_single_post($postID,ARRAY_A);
if (!isset($entry) || !isset($entry['ID']))
$this->not_found();
return;
}
/**
* Display posts XML.
*
* @since 2.2.0
*
* @param int $page Optional. Page ID.
* @param string $post_type Optional, default is 'post'. Post Type.
*/
function get_posts($page = 1, $post_type = 'post') {
$feed = $this->get_feed($page, $post_type);
$this->output($feed);
}
/**
* Display attachment XML.
*
* @since 2.2.0
*
* @param int $page Page ID.
* @param string $post_type Optional, default is 'attachment'. Post type.
*/
function get_attachments($page = 1, $post_type = 'attachment') {
$GLOBALS['post_type'] = $post_type;
$feed = $this->get_feed($page, $post_type);
$this->output($feed);
}
/**
* Retrieve feed XML.
*
* @since 2.2.0
*
* @param int $page Page ID.
* @param string $post_type Optional, default is post. Post type.
* @return string
*/
function get_feed($page = 1, $post_type = 'post') {
global $post, $wp, $wp_query, $posts, $wpdb, $blog_id;
ob_start();
$this->ENTRY_PATH = $post_type;
if (!isset($page)) {
$page = 1;
}
$page = (int) $page;
$count = get_option('posts_per_rss');
wp('posts_per_page=' . $count . '&offset=' . ($count * ($page-1)) . '&orderby=modified&post_status=any');
$post = $GLOBALS['post'];
$posts = $GLOBALS['posts'];
$wp = $GLOBALS['wp'];
$wp_query = $GLOBALS['wp_query'];
$wpdb = $GLOBALS['wpdb'];
$blog_id = (int) $GLOBALS['blog_id'];
$last_page = $wp_query->max_num_pages;
$next_page = (($page + 1) > $last_page) ? null : $page + 1;
$prev_page = ($page - 1) < 1 ? null : $page - 1;
$last_page = ((int)$last_page == 1 || (int)$last_page == 0) ? null : (int) $last_page;
$self_page = $page > 1 ? $page : null;
?><feed xmlns="<?php echo $this->ATOM_NS ?>" xmlns:app="<?php echo $this->ATOMPUB_NS ?>" xml:lang="<?php bloginfo_rss( 'language' ); ?>" <?php do_action('app_ns'); ?> >
<id><?php $this->the_entries_url() ?></id>
<updated><?php echo mysql2date('Y-m-d\TH:i:s\Z', get_lastpostmodified('GMT'), false); ?></updated>
<title type="text"><?php bloginfo_rss('name') ?></title>
<subtitle type="text"><?php bloginfo_rss("description") ?></subtitle>
<link rel="first" type="<?php echo $this->ATOM_CONTENT_TYPE ?>" href="<?php $this->the_entries_url() ?>" />
<?php if (isset($prev_page)): ?>
<link rel="previous" type="<?php echo $this->ATOM_CONTENT_TYPE ?>" href="<?php $this->the_entries_url($prev_page) ?>" />
<?php endif; ?>
<?php if (isset($next_page)): ?>
<link rel="next" type="<?php echo $this->ATOM_CONTENT_TYPE ?>" href="<?php $this->the_entries_url($next_page) ?>" />
<?php endif; ?>
<link rel="last" type="<?php echo $this->ATOM_CONTENT_TYPE ?>" href="<?php $this->the_entries_url($last_page) ?>" />
<link rel="self" type="<?php echo $this->ATOM_CONTENT_TYPE ?>" href="<?php $this->the_entries_url($self_page) ?>" />