6 files changed, 359 insertions, 0 deletions
diff --git a/engine/handlers/action_handler.php b/engine/handlers/action_handler.php
new file mode 100644
index 000000000..bcad110b2
--- /dev/null
+++ b/engine/handlers/action_handler.php
@@ -0,0 +1,20 @@
+<?php
+/**
+ * Action handler.
+ *
+ * This file dispatches actions.  It is called via a URL rewrite in .htaccess
+ * from http://site/action/.  Anything after 'action/' is considered the action
+ * and will be passed to {@link action()}.
+ *
+ * @warning This sets the input named 'action' to the current action.  When calling
+ * an action, get_input('action') will always return the action name.
+ *
+ * @package Elgg.Core
+ * @subpackage Actions
+ * @link http://docs.elgg.org/Tutorials/Actions
+ */
+
+require_once(dirname(dirname(__FILE__)) . "/start.php");
+
+$action = get_input("action");
+action($action);
diff --git a/engine/handlers/cache_handler.php b/engine/handlers/cache_handler.php
new file mode 100644
index 000000000..7706c2c92
--- /dev/null
+++ b/engine/handlers/cache_handler.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Cache handler.
+ *
+ * External access to cached CSS and JavaScript views. The cached file URLS
+ * should be of the form: cache/<type>/<viewtype>/<name/of/view>.<unique_id>.<type> where
+ * type is either css or js, view is the name of the cached view, and
+ * unique_id is an identifier that is updated every time the cache is flushed.
+ * The simplest way to maintain a unique identifier is to use the lastcache
+ * variable in Elgg's config object.
+ *
+ * @see elgg_register_simplecache_view()
+ *
+ * @package Elgg.Core
+ * @subpackage Cache
+ */
+
+// Get dataroot
+require_once(dirname(dirname(__FILE__)) . '/settings.php');
+$mysql_dblink = mysql_connect($CONFIG->dbhost, $CONFIG->dbuser, $CONFIG->dbpass, true);
+if (!$mysql_dblink) {
+	echo 'Cache error: unable to connect to database server';
+	exit;
+}
+
+if (!mysql_select_db($CONFIG->dbname, $mysql_dblink)) {
+	echo 'Cache error: unable to connect to Elgg database';
+	exit;
+}
+
+$query = "select name, value from {$CONFIG->dbprefix}datalists
+		where name in ('dataroot', 'simplecache_enabled')";
+
+$result = mysql_query($query, $mysql_dblink);
+if (!$result) {
+	echo 'Cache error: unable to get the data root';
+	exit;
+}
+while ($row = mysql_fetch_object($result)) {
+	${$row->name} = $row->value;
+}
+mysql_free_result($result);
+
+
+$dirty_request = $_GET['request'];
+// only alphanumeric characters plus /, ., and _ and no '..'
+$filter = array("options" => array("regexp" => "/^(\.?[_a-zA-Z0-9\/]+)+$/"));
+$request = filter_var($dirty_request, FILTER_VALIDATE_REGEXP, $filter);
+if (!$request || !$simplecache_enabled) {
+	echo 'Cache error: bad request';
+	exit;
+}
+
+// testing showed regex to be marginally faster than array / string functions over 100000 reps
+// it won't make a difference in real life and regex is easier to read.
+// <type>/<viewtype>/<name/of/view.and.dots>.<ts>.<type>
+$regex = '|([^/]+)/([^/]+)/(.+)\.([^\.]+)\.([^.]+)$|';
+preg_match($regex, $request, $matches);
+
+$type = $matches[1];
+$viewtype = $matches[2];
+$view = $matches[3];
+$ts = $matches[4];
+
+// If is the same ETag, content didn't changed.
+$etag = $ts;
+if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && trim($_SERVER['HTTP_IF_NONE_MATCH']) == "\"$etag\"") {
+	header("HTTP/1.1 304 Not Modified");
+	exit;
+}
+
+switch ($type) {
+	case 'css':
+		header("Content-type: text/css", true);
+		$view = "css/$view";
+		break;
+	case 'js':
+		header('Content-type: text/javascript', true);
+		$view = "js/$view";
+		break;
+}
+
+header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', strtotime("+6 months")), true);
+header("Pragma: public", true);
+header("Cache-Control: public", true);
+header("ETag: \"$etag\"");
+
+$filename = $dataroot . 'views_simplecache/' . md5($viewtype . $view);
+
+if (file_exists($filename)) {
+	$contents = file_get_contents($filename);
+} else {
+	// someone trying to access a non-cached file or a race condition with cache flushing
+	mysql_close($mysql_dblink);
+	require_once(dirname(dirname(__FILE__)) . "/start.php");
+	elgg_regenerate_simplecache();
+
+	elgg_set_viewtype($viewtype);
+	$contents = elgg_view($view);
+}
+
+echo $contents;
diff --git a/engine/handlers/export_handler.php b/engine/handlers/export_handler.php
new file mode 100644
index 000000000..aa5214c23
--- /dev/null
+++ b/engine/handlers/export_handler.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Export handler.
+ *
+ * @package Elgg.Core
+ * @subpackage Export
+ */
+
+require_once(dirname(dirname(__FILE__)) . "/start.php");
+
+
+// Get input values, these will be mapped via modrewrite
+$guid = get_input("guid"); // guid of the entity
+
+// For attributes eg http://example.com/odd/73/attr/owner_uuid/
+// or http://example.com/odd/73/metadata/86/
+$type = get_input("type"); // attr, metadata, annotation, relationship
+$id_or_name = get_input("idname"); // Either a number or the key name (if attribute)
+
+$body = "";
+$title = "";
+
+// Only export the GUID
+if (($guid != "") && ($type == "") && ($id_or_name == "")) {
+	$entity = get_entity($guid);
+
+	if (!$entity) {
+		$query = elgg_echo('InvalidParameterException:GUIDNotFound', array($guid));
+		throw new InvalidParameterException($query);
+	}
+
+	$title = "GUID:$guid";
+	$body = elgg_view("export/entity", array("entity" => $entity, "uuid" => guid_to_uuid($guid)));
+
+	// Export an individual attribute
+} else if (($guid != "") && ($type != "") && ($id_or_name != "")) {
+	// Get a uuid
+	$entity = get_entity($guid);
+	if (!$entity) {
+		$msg = elgg_echo('InvalidParameterException:GUIDNotFound', array($guid));
+		throw new InvalidParameterException($msg);
+	}
+
+	$uuid = guid_to_uuid($entity->getGUID()) . "$type/$id_or_name/";
+
+	switch ($type) {
+		case 'attr' : // @todo: Do this better? - This is a bit of a hack...
+			$v = $entity->get($id_or_name);
+			if (!$v) {
+				$msg = elgg_echo('InvalidParameterException:IdNotExistForGUID', array($id_or_name, $guid));
+				throw new InvalidParameterException($msg);
+			}
+
+			$m = new ElggMetadata();
+
+			$m->value = $v;
+			$m->name = $id_or_name;
+			$m->entity_guid = $guid;
+			$m->time_created = $entity->time_created;
+			$m->time_updated = $entity->time_updated;
+			$m->owner_guid = $entity->owner_guid;
+			$m->id = $id_or_name;
+			$m->type = "attr";
+			break;
+		case 'metadata' :
+			$m = elgg_get_metadata_from_id($id_or_name);
+			break;
+		case 'annotation' :
+			$m = elgg_get_annotation_from_id($id_or_name);
+			break;
+		case 'relationship' :
+			$r = get_relationship($id_or_name);
+			break;
+		case 'volatile' :
+			$m = elgg_trigger_plugin_hook('volatile', 'metadata', array(
+				'guid' => $guid,
+				'varname' => $id_or_name,
+			));
+			break;
+
+		default :
+			$msg = elgg_echo('InvalidParameterException:CanNotExportType', array($type));
+			throw new InvalidParameterException($msg);
+	}
+
+	// Render metadata or relationship
+	if ((!$m) && (!$r)) {
+		throw new InvalidParameterException(elgg_echo('InvalidParameterException:NoDataFound'));
+	}
+
+	// Exporting metadata?
+	if ($m) {
+		if ($m->entity_guid != $entity->guid) {
+			throw new InvalidParameterException(elgg_echo('InvalidParameterException:DoesNotBelong'));
+		}
+
+		$title = "$type:$id_or_name";
+		$body = elgg_view("export/metadata", array("metadata" => $m, "uuid" => $uuid));
+	}
+
+	// Exporting relationship
+	if ($r) {
+		if (($r->guid_one != $entity->guid) && ($r->guid_two != $entity->guid)) {
+			throw new InvalidParameterException(elgg_echo('InvalidParameterException:DoesNotBelongOrRefer'));
+		}
+
+		$title = "$type:$id_or_name";
+		$body = elgg_view("export/relationship", array("relationship" => $r, "uuid" => $uuid));
+	}
+
+	// Something went wrong
+} else {
+	throw new InvalidParameterException(elgg_echo('InvalidParameterException:MissingParameter'));
+}
+
+$content = elgg_view_title($title) . $body;
+$body = elgg_view_layout('one_sidebar', array('content' => $content));
+echo elgg_view_page($title, $body);
diff --git a/engine/handlers/page_handler.php b/engine/handlers/page_handler.php
new file mode 100644
index 000000000..1ed295b7d
--- /dev/null
+++ b/engine/handlers/page_handler.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * Pages handler.
+ *
+ * This file dispatches pages.  It is called via a URL rewrite in .htaccess
+ * from http://site/handler/page1/page2.  The first element after site/ is
+ * the page handler name as registered by {@link elgg_register_page_handler()}.
+ * The rest of the string is sent to {@link page_handler()}.
+ * 
+ * Note that the following handler names are reserved by elgg and should not be
+ * registered by any plugins:
+ *  * action
+ *  * cache
+ *  * services
+ *  * export
+ *  * mt
+ *  * xml-rpc.php
+ *  * rewrite.php
+ *  * tag (deprecated, reserved for backwards compatibility)
+ *  * pg (deprecated, reserved for backwards compatibility)
+ *
+ * {@link page_handler()} explodes the pages string by / and sends it to
+ * the page handler function as registered by {@link elgg_register_page_handler()}.
+ * If a valid page handler isn't found, plugins have a chance to provide a 404.
+ *
+ * @package Elgg.Core
+ * @subpackage PageHandler
+ * @link http://docs.elgg.org/Tutorials/PageHandlers
+ */
+
+
+// Permanent redirect to pg-less urls
+$url = $_SERVER['REQUEST_URI'];
+$new_url = preg_replace('#/pg/#', '/', $url, 1);
+
+if ($url !== $new_url) {
+	header("HTTP/1.1 301 Moved Permanently"); 
+	header("Location: $new_url"); 
+}
+
+require_once(dirname(dirname(__FILE__)) . "/start.php");
+
+$handler = get_input('handler');
+$page = get_input('page');
+
+if (!page_handler($handler, $page)) {
+	forward('', '404');
+}
diff --git a/engine/handlers/service_handler.php b/engine/handlers/service_handler.php
new file mode 100644
index 000000000..9cfcd230f
--- /dev/null
+++ b/engine/handlers/service_handler.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * Services handler.
+ *
+ * This file dispatches requests to web services.  It is called via a URL rewrite
+ * in .htaccess from http://site/services/api/handler/response_format/request.
+ * The first element after 'services/api/' is the service handler name as
+ * registered by {@link register_service_handler()}.
+ *
+ * The remaining string is then passed to the {@link service_handler()}
+ * which explodes by /, extracts the first element as the response format
+ * (viewtype), and then passes the remaining array to the service handler
+ * function registered by {@link register_service_handler()}.
+ *
+ * If a service handler isn't found, a 404 header is sent.
+ *
+ * @package Elgg.Core
+ * @subpackage WebServices
+ * @link http://docs.elgg.org/Tutorials/WebServices
+ */
+
+require_once(dirname(dirname(__FILE__)) . "/start.php");
+
+$handler = get_input('handler');
+$request = get_input('request');
+
+service_handler($handler, $request);
diff --git a/engine/handlers/xml-rpc_handler.php b/engine/handlers/xml-rpc_handler.php
new file mode 100644
index 000000000..2ee29e5b7
--- /dev/null
+++ b/engine/handlers/xml-rpc_handler.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ * XML-RPC handler.
+ *
+ * @warning This is very old code. Does it work at all?
+ *
+ * @package Elgg.Core
+ * @subpackage XMLRPC
+ * @link http://docs.elgg.org/Tutorials/XMLRPC
+ * @todo Does this work?
+ */
+
+require_once(dirname(dirname(__FILE__)) . "/start.php");
+
+// Register the error handler
+error_reporting(E_ALL);
+set_error_handler('_php_xmlrpc_error_handler');
+
+// Register a default exception handler
+set_exception_handler('_php_xmlrpc_exception_handler');
+
+// Set some defaults
+$result = null;
+set_input('view', 'xml'); // Set default view regardless
+
+// Get the post data
+$input = get_post_data();
+
+if ($input) {
+	// 	Parse structures from xml
+	$call = new XMLRPCCall($input);
+
+	// Process call
+	$result = trigger_xmlrpc_handler($call);
+} else {
+	throw new CallException(elgg_echo('xmlrpc:noinputdata'));
+}
+
+if (!($result instanceof XMLRPCResponse)) {
+	throw new APIException(elgg_echo('APIException:ApiResultUnknown'));
+}
+
+// Output result
+echo elgg_view_page("XML-RPC", elgg_view("xml-rpc/output", array('result' => $result)));