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wp-app.php
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<?php
/**
* Atom Publishing Protocol support for WordPress
*
* @author Original by Elias Torres <http://torrez.us/archives/2006/08/31/491/>
* @author Modified by Dougal Campbell <http://dougal.gunters.org/>
* @version 1.0.5-dc
*/
/**
* WordPress is handling an Atom Publishing Protocol request.
*
* @var bool
*/
define('APP_REQUEST', true);
/** Set up WordPress environment */
require_once('./wp-load.php');
/** Post Template API */
require_once(ABSPATH . WPINC . '/post-template.php');
/** Atom Publishing Protocol Class */
require_once(ABSPATH . WPINC . '/atomlib.php');
/** Feed Handling API */
require_once(ABSPATH . WPINC . '/feed.php');
/** Admin Image API for metadata updating */
require_once(ABSPATH . '/wp-admin/includes/image.php');
$_SERVER['PATH_INFO'] = preg_replace( '/.*\/wp-app\.php/', '', $_SERVER['REQUEST_URI'] );
/**
* Whether to enable Atom Publishing Protocol Logging.
*
* @name app_logging
* @var int|bool
*/
$app_logging = 0;
/**
* Whether to always authenticate user. Permanently set to true.
*
* @name always_authenticate
* @var int|bool
* @todo Should be an option somewhere
*/
$always_authenticate = 1;
/**
* Writes logging info to a file.
*
* @since 2.2.0
* @uses $app_logging
* @package WordPress
* @subpackage Logging
*
* @param string $label Type of logging
* @param string $msg Information describing logging reason.
*/
function log_app($label,$msg) {
global $app_logging;
if ($app_logging) {
$fp = fopen( 'wp-app.log', 'a+');
$date = gmdate( 'Y-m-d H:i:s' );
fwrite($fp, "\n\n$date - $label\n$msg\n");
fclose($fp);
}
}
if ( !function_exists('wp_set_current_user') ) :
/**
* @ignore
*/
function wp_set_current_user($id, $name = '') {
global $current_user;
if ( isset($current_user) && ($id == $current_user->ID) )
return $current_user;
$current_user = new WP_User($id, $name);
return $current_user;
}
endif;
/**
* Filter to add more post statuses.
*
* @since 2.2.0
*
* @param string $where SQL statement to filter.
* @return string Filtered SQL statement with added post_status for where clause.
*/
function wa_posts_where_include_drafts_filter($where) {
$where = str_replace("post_status = 'publish'","post_status = 'publish' OR post_status = 'future' OR post_status = 'draft' OR post_status = 'inherit'", $where);
return $where;
}
add_filter('posts_where', 'wa_posts_where_include_drafts_filter');
/**
* WordPress AtomPub API implementation.
*
* @package WordPress
* @subpackage Publishing
* @since 2.2.0
*/
class AtomServer {
/**
* 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;
/**
* PHP4 constructor - Sets up object properties.
*
* @since 2.2.0
* @return AtomServer
*/
function AtomServer() {
$this->script_name = array_pop(explode('/',$_SERVER['SCRIPT_NAME']));
$this->app_base = get_bloginfo('url') . '/' . $this->script_name . '/';
if ( isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on' ) {
$this->app_base = preg_replace( '/^http:\/\//', 'https://', $this->app_base );
}
$this->selectors = array(
'@/service$@' =>
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() {
global $always_authenticate;
if( !empty( $_SERVER['ORIG_PATH_INFO'] ) )
$path = $_SERVER['ORIG_PATH_INFO'];
else
$path = $_SERVER['PATH_INFO'];
$method = $_SERVER['REQUEST_METHOD'];
log_app('REQUEST',"$method $path\n================");
$this->process_conditionals();
//$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' ) )
$this->forbidden( sprintf( __( 'AtomPub services are disabled on this blog. An admin user can enable them at %s' ), admin_url('options-writing.php') ) );
// dispatch
foreach($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()) {
if ($always_authenticate) {
$this->auth_required('Credentials required.');
}
}
array_shift($matches);
call_user_func_array(array(&$this,$funcs[$method]), $matches);
exit();
} 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() {
log_app('function','get_service()');
if( !current_user_can( 'edit_posts' ) )
$this->auth_required( __( 'Sorry, you do not have the right to access this blog.' ) );
$entries_url = esc_attr($this->get_entries_url());
$categories_url = esc_attr($this->get_categories_url());
$media_url = esc_attr($this->get_attachments_url());
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() {
log_app('function','get_categories_xml()');
if( !current_user_can( 'edit_posts' ) )
$this->auth_required( __( 'Sorry, you do not have the right to access this blog.' ) );
$home = esc_attr(get_bloginfo_rss('home'));
$categories = "";
$cats = get_categories("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 $blog_id, $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);
log_app('Received entry:', print_r($entry,true));
$catnames = array();
foreach($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) && trim($entry->draft) == 'yes') ? false : true;
$cap = ($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 = (int ) $blog_id;
$post_status = ($publish) ? 'publish' : 'draft';
$post_author = (int) $user_ID;
$post_title = $entry->title[1];
$post_content = $entry->content[1];
$post_excerpt = $entry->summary[1];
$pubtimes = $this->get_publish_time($entry->published);
$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);
log_app('Inserting Post. Data:', print_r($post_data,true));
$postID = wp_insert_post($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);
log_app('function',"create_post($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);
log_app('function',"get_post($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);
log_app('Received UPDATED entry:', print_r($parsed,true));
// 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) && trim($parsed->draft) == 'yes') ? false : true;
$post_status = ($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, $parsed );
log_app('function',"put_post($postID)");
$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) {
$this->internal_error(__('For some strange yet very annoying reason, this post could not be deleted.'));
}
log_app('function',"delete_post($postID)");
$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' ) )
$this->auth_required( __( 'Sorry, you do not have permission to upload files.' ) );
if (!isset($postID)) {
$this->get_attachments();
} else {
$this->set_current_entry($postID);
$output = $this->get_entry($postID, 'attachment');
log_app('function',"get_attachment($postID)");
$this->output($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 = sanitize_file_name( $_SERVER['HTTP_SLUG'] );
elseif ( isset( $_SERVER['HTTP_TITLE'] ) )
$slug = sanitize_file_name( $_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'] );
$slug = "$slug.$ext";
$file = wp_upload_bits( $slug, NULL, $bits);
log_app('wp_upload_bits returns:',print_r($file,true));
$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, $output, 'attachment');
log_app('function',"create_attachment($postID)");
}
/**
* 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) {
$this->internal_error(__('For some strange yet very annoying reason, this post could not be edited.'));
}
log_app('function',"put_attachment($postID)");
$this->ok();
}
/**
* Remove attachment.
*
* @since 2.2.0
*
* @param int $postID Post ID.
*/
function delete_attachment($postID) {
log_app('function',"delete_attachment($postID). File '$location' deleted.");
// 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']))
$this->internal_error(__('Error ocurred while accessing post metadata for file location.'));
// delete file
@unlink($location);
// delete attachment
$result = wp_delete_post($postID);
if (!$result) {
$this->internal_error(__('For some strange yet very annoying reason, this post could not be deleted.'));
}
log_app('function',"delete_attachment($postID). File '$location' 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 ocurred 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');
}
log_app('function',"get_file($postID)");
exit;
}
/**
* 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 ocurred 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, $location ) );
log_app('function',"put_file($postID)");
$this->ok();
}
/**
* Retrieve entries URL.
*
* @since 2.2.0
*
* @param int $page Page ID.
* @return string
*/
function get_entries_url($page = null) {
if($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 $deprecated Optional, not used.
* @return string
*/
function get_categories_url($deprecated = '') {
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";
log_app('function',"get_entry_url() = $url");
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
*/