Use OC_JSON for json responses

Create OC_JSON class, for single point of creating json responses.
No real logic change, this just cleans up the code a bit.

54 files changed, 226 insertions, 351 deletions

diff --git a/apps/bookmarks/ajax/addBookmark.php b/apps/bookmarks/ajax/addBookmark.php
index 7cf5baa4a6e..9b0beb388a0 100644
--- a/apps/bookmarks/ajax/addBookmark.php
+++ b/apps/bookmarks/ajax/addBookmark.php
@@ -26,14 +26,8 @@ $RUNTIME_NOSETUPFS=true;
 
 require_once('../../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
 if( $CONFIG_DBTYPE == 'sqlite' or $CONFIG_DBTYPE == 'sqlite3' ){
@@ -76,6 +70,6 @@ if($b_id !== false) {
 	    $query->execute($params);
 	}
 
-	echo json_encode( array( 'status' => 'success', 'data' => $b_id));
+	OC_JSON::success(array('data' => $b_id));
 }
 
diff --git a/apps/bookmarks/ajax/delBookmark.php b/apps/bookmarks/ajax/delBookmark.php
index bf1611fe5c1..afe60f7d1bf 100644
--- a/apps/bookmarks/ajax/delBookmark.php
+++ b/apps/bookmarks/ajax/delBookmark.php
@@ -26,14 +26,8 @@ $RUNTIME_NOSETUPFS=true;
 
 require_once('../../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $params=array(
 	htmlspecialchars_decode($_GET["url"]),
@@ -64,4 +58,4 @@ $query = OC_DB::prepare("
 $result = $query->execute();
 // var_dump($params);
 
-echo json_encode( array( "status" => "success", "data" => array()));
+OC_JSON::success(array('data' => array()));
diff --git a/apps/bookmarks/ajax/editBookmark.php b/apps/bookmarks/ajax/editBookmark.php
index 1bd2fc08bca..5125f9ce898 100644
--- a/apps/bookmarks/ajax/editBookmark.php
+++ b/apps/bookmarks/ajax/editBookmark.php
@@ -26,14 +26,8 @@ $RUNTIME_NOSETUPFS=true;
 
 require_once('../../../lib/base.php');
 
-// We send json data
-header( 'Content-Type: application/jsonrequest' );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => 'Authentication error' )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
 if( $CONFIG_DBTYPE == 'sqlite' or $CONFIG_DBTYPE == 'sqlite3' ){
diff --git a/apps/bookmarks/ajax/getMeta.php b/apps/bookmarks/ajax/getMeta.php
index e9fe0d684dc..4583ef204b4 100644
--- a/apps/bookmarks/ajax/getMeta.php
+++ b/apps/bookmarks/ajax/getMeta.php
@@ -26,14 +26,8 @@ $RUNTIME_NOSETUPFS=true;
 
 require_once('../../../lib/base.php');
 
-// We send json data
-header( 'Content-Type: application/jsonrequest' );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => 'Authentication error' )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // $metadata = array();
 
@@ -41,4 +35,4 @@ require '../bookmarksHelper.php';
 $metadata = getURLMetadata(htmlspecialchars_decode($_GET["url"]));
 
 
-echo json_encode( array( 'status' => 'success', 'data' => $metadata));
+OC_JSON::success(array('data' => $metadata));
diff --git a/apps/bookmarks/ajax/recordClick.php b/apps/bookmarks/ajax/recordClick.php
index 116daea8bbb..f5f7c20c6a0 100644
--- a/apps/bookmarks/ajax/recordClick.php
+++ b/apps/bookmarks/ajax/recordClick.php
@@ -27,11 +27,7 @@ $RUNTIME_NOSETUPFS=true;
 require_once('../../../lib/base.php');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	header( "Content-Type: application/jsonrequest" );
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $query = OC_DB::prepare("
 	UPDATE *PREFIX*bookmarks
diff --git a/apps/bookmarks/ajax/updateList.php b/apps/bookmarks/ajax/updateList.php
index e9051a8dbfa..de3480d6c3a 100644
--- a/apps/bookmarks/ajax/updateList.php
+++ b/apps/bookmarks/ajax/updateList.php
@@ -26,14 +26,8 @@ $RUNTIME_NOSETUPFS=true;
 
 require_once('../../../lib/base.php');
 
-// We send json data
-header( 'Content-Type: application/jsonrequest' );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => 'Authentication error' )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $params=array(OC_User::getUser());
 $CONFIG_DBTYPE = OC_Config::getValue( 'dbtype', 'sqlite' );
@@ -85,4 +79,4 @@ $query = OC_DB::prepare('
 	
 $bookmarks = $query->execute($params)->fetchAll();
 
-echo json_encode( array( 'status' => 'success', 'data' => $bookmarks));
+OC_JSON::success(array('data' => $bookmarks));
diff --git a/apps/calendar/ajax/createcalendar.php b/apps/calendar/ajax/createcalendar.php
index 64c6513f53f..7d80333b258 100644
--- a/apps/calendar/ajax/createcalendar.php
+++ b/apps/calendar/ajax/createcalendar.php
@@ -10,14 +10,8 @@ require_once('../../../lib/base.php');
 
 $l10n = new OC_L10N('calendar');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Authentication error") )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $userid = OC_User::getUser();
 $calendarid = OC_Calendar_Calendar::addCalendar($userid, $_POST['name'], $_POST['description'], 'VEVENT,VTODO,VJOURNAL', null, 0, $_POST['color']);
@@ -25,4 +19,4 @@ OC_Calendar_Calendar::setCalendarActive($calendarid, 1);
 $calendar = OC_Calendar_Calendar::findCalendar($calendarid);
 $tmpl = new OC_Template('calendar', 'part.choosecalendar.rowfields');
 $tmpl->assign('calendar', $calendar);
-echo json_encode( array( "status" => "error", "data" => $tmpl->fetchPage().'' ));
+OC_JSON::success(array('data' => $tmpl->fetchPage()));
diff --git a/apps/calendar/ajax/deletecalendar.php b/apps/calendar/ajax/deletecalendar.php
index 71129f2c040..30607b92e6f 100644
--- a/apps/calendar/ajax/deletecalendar.php
+++ b/apps/calendar/ajax/deletecalendar.php
@@ -16,13 +16,13 @@ if(!OC_USER::isLoggedIn()) {
 $cal = $_POST["calendarid"];
 $calendar = OC_Calendar_Calendar::findCalendar($cal);
 if($calendar["userid"] != OC_User::getUser()){
-	echo json_encode(array('status'=>'error','error'=>'permission_denied'));
+	OC_JSON::error(array('error'=>'permission_denied'));
 	exit;
 }
 $del = OC_Calendar_Calendar::deleteCalendar($cal);
 if($del == true){
-	echo json_encode(array('status' => 'success'));
+	OC_JSON::success();
 }else{
-	echo json_encode(array('status'=>'error', 'error'=>'dberror'));
+	OC_JSON::error(array('error'=>'dberror'));
 }
 ?> 
diff --git a/apps/calendar/ajax/deleteevent.php b/apps/calendar/ajax/deleteevent.php
index 08a0e1a1e26..a6750267bd2 100644
--- a/apps/calendar/ajax/deleteevent.php
+++ b/apps/calendar/ajax/deleteevent.php
@@ -17,14 +17,14 @@ $id = $_POST['id'];
 $data = OC_Calendar_Object::find($id);
 if (!$data)
 {
-	echo json_encode(array('status'=>'error'));
+	OC_JSON::error();
 	exit;
 }
 $calendar = OC_Calendar_Calendar::findCalendar($data['calendarid']);
 if($calendar['userid'] != OC_User::getUser()){
-	echo json_encode(array('status'=>'error'));
+	OC_JSON::error();
 	exit;
 }
 $result = OC_Calendar_Object::delete($id);
-echo json_encode(array('status' => 'success'));
+OC_JSON::success();
 ?> 
diff --git a/apps/calendar/ajax/editevent.php b/apps/calendar/ajax/editevent.php
index 5659e7e3c1c..7187e05d56f 100644
--- a/apps/calendar/ajax/editevent.php
+++ b/apps/calendar/ajax/editevent.php
@@ -17,8 +17,7 @@ if(!OC_USER::isLoggedIn()) {
 $errarr = OC_Calendar_Object::validateRequest($_POST);
 if($errarr){
 	//show validate errors
-	$errarr['status'] = 'error';
-	echo json_encode($errarr);
+	OC_JSON::error($errarr);
 	exit;
 }else{
 	$id = $_POST['id'];
@@ -26,12 +25,12 @@ if($errarr){
 	$data = OC_Calendar_Object::find($id);
 	if (!$data)
 	{
-		echo json_encode(array('status'=>'error'));
+		OC_JSON::error();
 		exit;
 	}
 	$calendar = OC_Calendar_Calendar::findCalendar($data['calendarid']);
 	if($calendar['userid'] != OC_User::getUser()){
-		echo json_encode(array('status'=>'error'));
+		OC_JSON::error();
 		exit;
 	}
 	$vcalendar = Sabre_VObject_Reader::read($data['calendardata']);
@@ -40,6 +39,6 @@ if($errarr){
 	if ($data['calendarid'] != $cal) {
 		OC_Calendar_Object::moveToCalendar($id, $cal);
 	}
-	echo json_encode(array('status' => 'success'));
+	OC_JSON::success();
 }
-?> 
+?>
diff --git a/apps/calendar/ajax/newevent.php b/apps/calendar/ajax/newevent.php
index f3cca1cee46..9ac3b0aaff6 100644
--- a/apps/calendar/ajax/newevent.php
+++ b/apps/calendar/ajax/newevent.php
@@ -17,13 +17,12 @@ if(!OC_USER::isLoggedIn()) {
 $errarr = OC_Calendar_Object::validateRequest($_POST);
 if($errarr){
 	//show validate errors
-	$errarr['status'] = 'error';
-	echo json_encode($errarr);
+	OC_JSON::error($errarr);
 	exit;
 }else{
 	$cal = $_POST['calendar'];
 	$vcalendar = OC_Calendar_Object::createVCalendarFromRequest($_POST);
 	$result = OC_Calendar_Object::add($cal, $vcalendar->serialize());
-	echo json_encode(array('status'=>'success'));
+	OC_JSON::success();
 }
 ?>
diff --git a/apps/calendar/ajax/settimezone.php b/apps/calendar/ajax/settimezone.php
index a07b56ee9ae..2b82bc8e4bc 100644
--- a/apps/calendar/ajax/settimezone.php
+++ b/apps/calendar/ajax/settimezone.php
@@ -11,22 +11,16 @@ require_once('../../../lib/base.php');
 
 $l=new OC_L10N('calendar');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Authentication error") )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 if( isset( $_POST['timezone'] ) ){
 	$timezone=$_POST['timezone'];
 	OC_Preferences::setValue( OC_User::getUser(), 'calendar', 'timezone', $timezone );
-	echo json_encode( array( "status" => "success", "data" => array( "message" => $l->t("Timezone changed") )));
+	OC_JSON::success(array('data' => array( 'message' => $l->t('Timezone changed') )));
 }else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Invalid request") )));
+	OC_JSON::error(array('data' => array( 'message' => $l->t('Invalid request') )));
 }
 
 ?>
diff --git a/apps/calendar/ajax/updatecalendar.php b/apps/calendar/ajax/updatecalendar.php
index efb0b99bad7..d53515d0deb 100644
--- a/apps/calendar/ajax/updatecalendar.php
+++ b/apps/calendar/ajax/updatecalendar.php
@@ -10,14 +10,8 @@ require_once('../../../lib/base.php');
 
 $l10n = new OC_L10N('calendar');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Authentication error") )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $calendarid = $_POST['id'];
 OC_Calendar_Calendar::editCalendar($calendarid, $_POST['name'], $_POST['description'], null, null, null, $_POST['color']);
@@ -25,4 +19,4 @@ OC_Calendar_Calendar::setCalendarActive($calendarid, $_POST['active']);
 $calendar = OC_Calendar_Calendar::findCalendar($calendarid);
 $tmpl = new OC_Template('calendar', 'part.choosecalendar.rowfields');
 $tmpl->assign('calendar', $calendar);
-echo json_encode( array( "status" => "success", "data" => $tmpl->fetchPage() ));
+OC_JSON::success(array('data' => $tmpl->fetchPage()));
diff --git a/apps/calendar/templates/part.getcal.php b/apps/calendar/templates/part.getcal.php
index 35d08c85b3a..900a43b3df2 100644
--- a/apps/calendar/templates/part.getcal.php
+++ b/apps/calendar/templates/part.getcal.php
@@ -53,5 +53,5 @@ foreach($events as $event)
 		$return_events[$year][$month][$day][$hour] = array(1 => $return_event);
 	}
 }
-echo json_encode($return_events);
+OC_JSON::encodedPrint($return_events);
 ?>
diff --git a/apps/contacts/ajax/addcard.php b/apps/contacts/ajax/addcard.php
index 6005d74d144..cfae3327f56 100644
--- a/apps/contacts/ajax/addcard.php
+++ b/apps/contacts/ajax/addcard.php
@@ -27,14 +27,11 @@ $aid = $_POST['id'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $addressbook = OC_Contacts_Addressbook::find( $aid );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your addressbook.')))); // Same here (as with the contact error). Could this error be improved?
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your addressbook.')))); // Same here (as with the contact error). Could this error be improved?
 	exit();
 }
 
@@ -51,4 +48,4 @@ $tmpl->assign('details',$details);
 $tmpl->assign('id',$id);
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'id' => $id, 'page' => $page )));
+OC_JSON::success(array('data' => array( 'id' => $id, 'page' => $page )));
diff --git a/apps/contacts/ajax/addproperty.php b/apps/contacts/ajax/addproperty.php
index a311bba6e26..5a37f77f858 100644
--- a/apps/contacts/ajax/addproperty.php
+++ b/apps/contacts/ajax/addproperty.php
@@ -27,27 +27,24 @@ $id = $_POST['id'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 $vcard = OC_Contacts_VCard::parse($card['carddata']);
 // Check if the card is valid
 if(is_null($vcard)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('vCard could not be read.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('vCard could not be read.'))));
 	exit();
 }
 
@@ -75,4 +72,4 @@ $tmpl = new OC_Template('contacts','part.property');
 $tmpl->assign('property',OC_Contacts_VCard::structureProperty($property,$line));
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'page' => $page )));
+OC_JSON::success(array('data' => array( 'page' => $page )));
diff --git a/apps/contacts/ajax/deletebook.php b/apps/contacts/ajax/deletebook.php
index 38322f5c109..13be33eb5a9 100644
--- a/apps/contacts/ajax/deletebook.php
+++ b/apps/contacts/ajax/deletebook.php
@@ -28,16 +28,13 @@ $id = $_GET['id'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $addressbook = OC_Contacts_Addressbook::find( $id );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 OC_Contacts_Addressbook::delete($id);
-echo json_encode( array( 'status' => 'success', 'data' => array( 'id' => $id )));
+OC_JSON::success(array('data' => array( 'id' => $id )));
diff --git a/apps/contacts/ajax/deletecard.php b/apps/contacts/ajax/deletecard.php
index 7dde7d30a52..c69638320ed 100644
--- a/apps/contacts/ajax/deletecard.php
+++ b/apps/contacts/ajax/deletecard.php
@@ -28,23 +28,19 @@ $id = $_GET['id'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
-
+OC_JSON::checkLoggedIn();
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 OC_Contacts_VCard::delete($id);
-echo json_encode( array( 'status' => 'success', 'data' => array( 'id' => $id )));
+OC_JSON::success(array('data' => array( 'id' => $id )));
diff --git a/apps/contacts/ajax/deleteproperty.php b/apps/contacts/ajax/deleteproperty.php
index 07cea0b53e1..40b765cf845 100644
--- a/apps/contacts/ajax/deleteproperty.php
+++ b/apps/contacts/ajax/deleteproperty.php
@@ -30,28 +30,24 @@ $checksum = $_GET['checksum'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
-
+OC_JSON::checkLoggedIn();
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 $vcard = OC_Contacts_VCard::parse($card['carddata']);
 // Check if the card is valid
 if(is_null($vcard)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('vCard could not be read.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('vCard could not be read.'))));
 	exit();
 }
 
@@ -62,11 +58,11 @@ for($i=0;$i<count($vcard->children);$i++){
 	}
 }
 if(is_null($line)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Information about vCard is incorrect. Please reload the page.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Information about vCard is incorrect. Please reload the page.'))));
 	exit();
 }
 
 unset($vcard->children[$line]);
 
 OC_Contacts_VCard::edit($id,$vcard->serialize());
-echo json_encode( array( 'status' => 'success', 'data' => array( 'id' => $id )));
+OC_JSON::success(array('data' => array( 'id' => $id )));
diff --git a/apps/contacts/ajax/getdetails.php b/apps/contacts/ajax/getdetails.php
index ab1f1d66f5e..47d88a771e6 100644
--- a/apps/contacts/ajax/getdetails.php
+++ b/apps/contacts/ajax/getdetails.php
@@ -28,28 +28,25 @@ $id = $_GET['id'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 $vcard = OC_Contacts_VCard::parse($card['carddata']);
 // Check if the card is valid
 if(is_null($vcard)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('vCard could not be read.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('vCard could not be read.'))));
 	exit();
 }
 
@@ -59,4 +56,4 @@ $tmpl->assign('details',$details);
 $tmpl->assign('id',$id);
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'id' => $id, 'page' => $page )));
+OC_JSON::success(array('data' => array( 'id' => $id, 'page' => $page )));
diff --git a/apps/contacts/ajax/setproperty.php b/apps/contacts/ajax/setproperty.php
index 9178a6aac9f..b4fc2162d90 100644
--- a/apps/contacts/ajax/setproperty.php
+++ b/apps/contacts/ajax/setproperty.php
@@ -28,27 +28,24 @@ $checksum = $_POST['checksum'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 $vcard = OC_Contacts_VCard::parse($card['carddata']);
 // Check if the card is valid
 if(is_null($vcard)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('vCard could not be read.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('vCard could not be read.'))));
 	exit();
 }
 
@@ -59,7 +56,7 @@ for($i=0;$i<count($vcard->children);$i++){
 	}
 }
 if(is_null($line)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Information about vCard is incorrect. Please reload the page.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Information about vCard is incorrect. Please reload the page.'))));
 	exit();
 }
 
@@ -100,4 +97,4 @@ $tmpl = new OC_Template('contacts','part.property');
 $tmpl->assign('property',OC_Contacts_VCard::structureProperty($vcard->children[$line],$line));
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'page' => $page, 'line' => $line, 'oldchecksum' => $_POST['checksum'] )));
+OC_JSON::success(array('data' => array( 'page' => $page, 'line' => $line, 'oldchecksum' => $_POST['checksum'] )));
diff --git a/apps/contacts/ajax/showaddcard.php b/apps/contacts/ajax/showaddcard.php
index 89c78fcdf54..58567392d7c 100644
--- a/apps/contacts/ajax/showaddcard.php
+++ b/apps/contacts/ajax/showaddcard.php
@@ -26,14 +26,11 @@ require_once('../../../lib/base.php');
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $addressbooks = OC_Contacts_Addressbook::all(OC_USER::getUser());
 $tmpl = new OC_Template('contacts','part.addcardform');
 $tmpl->assign('addressbooks',$addressbooks);
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'page' => $page )));
+OC_JSON::success(array('data' => array( 'page' => $page )));
diff --git a/apps/contacts/ajax/showaddproperty.php b/apps/contacts/ajax/showaddproperty.php
index 718478d42bf..0d01b37d8ef 100644
--- a/apps/contacts/ajax/showaddproperty.php
+++ b/apps/contacts/ajax/showaddproperty.php
@@ -27,20 +27,17 @@ $id = $_GET['id'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
@@ -48,4 +45,4 @@ $tmpl = new OC_Template('contacts','part.addpropertyform');
 $tmpl->assign('id',$id);
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'page' => $page )));
+OC_JSON::success(array('data' => array( 'page' => $page )));
diff --git a/apps/contacts/ajax/showsetproperty.php b/apps/contacts/ajax/showsetproperty.php
index 77b90ea8cc4..0b30a8e68ec 100644
--- a/apps/contacts/ajax/showsetproperty.php
+++ b/apps/contacts/ajax/showsetproperty.php
@@ -28,27 +28,24 @@ $checksum = $_GET['checksum'];
 $l10n = new OC_L10N('contacts');
 
 // Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('You need to log in.'))));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 $card = OC_Contacts_VCard::find( $id );
 if( $card === false ){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Contact could not be found.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Contact could not be found.'))));
 	exit();
 }
 
 $addressbook = OC_Contacts_Addressbook::find( $card['addressbookid'] );
 if( $addressbook === false || $addressbook['userid'] != OC_USER::getUser()){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('This is not your contact.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('This is not your contact.'))));
 	exit();
 }
 
 $vcard = OC_Contacts_VCard::parse($card['carddata']);
 // Check if the card is valid
 if(is_null($vcard)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('vCard could not be read.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('vCard could not be read.'))));
 	exit();
 }
 
@@ -59,7 +56,7 @@ for($i=0;$i<count($vcard->children);$i++){
 	}
 }
 if(is_null($line)){
-	echo json_encode( array( 'status' => 'error', 'data' => array( 'message' => $l10n->t('Information about vCard is incorrect. Please reload the page.'))));
+	OC_JSON::error(array('data' => array( 'message' => $l10n->t('Information about vCard is incorrect. Please reload the page.'))));
 	exit();
 }
 
@@ -70,4 +67,4 @@ $tmpl->assign('checksum',$checksum);
 $tmpl->assign('property',OC_Contacts_VCard::structureProperty($vcard->children[$line]));
 $page = $tmpl->fetchPage();
 
-echo json_encode( array( 'status' => 'success', 'data' => array( 'page' => $page )));
+OC_JSON::success(array('data' => array( 'page' => $page )));
diff --git a/apps/files_sharing/ajax/getitem.php b/apps/files_sharing/ajax/getitem.php
index 249af6cfa31..e7bda0f6144 100644
--- a/apps/files_sharing/ajax/getitem.php
+++ b/apps/files_sharing/ajax/getitem.php
@@ -30,7 +30,7 @@ while ($source != "" && $source != "/" && $source != "." && $source != $userDire
 	$source = dirname($source);
 }
 if (!empty($users)) {
-	echo json_encode($users);
+	OC_JSON::encodedPrint($users);
 }
 
-?>
\ No newline at end of file
+?>
diff --git a/apps/files_sharing/ajax/userautocomplete.php b/apps/files_sharing/ajax/userautocomplete.php
index 6da7afb659c..a3158cf72d6 100644
--- a/apps/files_sharing/ajax/userautocomplete.php
+++ b/apps/files_sharing/ajax/userautocomplete.php
@@ -3,10 +3,8 @@ $RUNTIME_NOAPPS = true;
 
 require_once('../../../lib/base.php');
 
-if (!OC_User::isLoggedIn()) {
-	echo json_encode(array("status" => "error", "data" => array("message" => "Authentication error")));
-	exit();
-}
+OC_JSON::checkLoggedIn();
+
 $users = array();
 $ocusers = OC_User::getUsers();
 $self = OC_User::getUser();
@@ -23,6 +21,6 @@ foreach ($groups as $group) {
 	$users[] = "<option value='".$group."'>".$group."</option>";
 }
 $users[] = "</optgroup>";
-echo json_encode($users);
+OC_JSON::encodedPrint($users);
 
 ?>
diff --git a/apps/media/ajax/api.php b/apps/media/ajax/api.php
index c5909e4c78b..84ee6334463 100644
--- a/apps/media/ajax/api.php
+++ b/apps/media/ajax/api.php
@@ -67,7 +67,7 @@ if($arguments['action']){
 			$data['artists']=OC_MEDIA_COLLECTION::getArtists();
 			$data['albums']=OC_MEDIA_COLLECTION::getAlbums();
 			$data['songs']=OC_MEDIA_COLLECTION::getSongs();
-			echo json_encode($data);
+			OC_JSON::encodedPrint($data);
 			break;
 		case 'scan':
 			OC_DB::beginTransaction();
@@ -81,13 +81,13 @@ if($arguments['action']){
 			echo (OC_MEDIA_SCANNER::scanFile($arguments['path']))?'true':'false';
 			break;
 		case 'get_artists':
-			echo json_encode(OC_MEDIA_COLLECTION::getArtists($arguments['search']));
+			OC_JSON::encodedPrint(OC_MEDIA_COLLECTION::getArtists($arguments['search']));
 			break;
 		case 'get_albums':
-			echo json_encode(OC_MEDIA_COLLECTION::getAlbums($arguments['artist'],$arguments['search']));
+			OC_JSON::encodedPrint(OC_MEDIA_COLLECTION::getAlbums($arguments['artist'],$arguments['search']));
 			break;
 		case 'get_songs':
-			echo json_encode(OC_MEDIA_COLLECTION::getSongs($arguments['artist'],$arguments['album'],$arguments['search']));
+			OC_JSON::encodedPrint(OC_MEDIA_COLLECTION::getSongs($arguments['artist'],$arguments['album'],$arguments['search']));
 			break;
 		case 'get_path_info':
 			if(OC_Filesystem::file_exists($arguments['path'])){
@@ -100,7 +100,7 @@ if($arguments['action']){
 					$song=OC_MEDIA_COLLECTION::getSong($songId);
 					$song['artist']=OC_MEDIA_COLLECTION::getArtistName($song['song_artist']);
 					$song['album']=OC_MEDIA_COLLECTION::getAlbumName($song['song_album']);
-					echo json_encode($song);
+					OC_JSON::encodedPrint($song);
 				}
 			}
 			break;
@@ -129,7 +129,7 @@ if($arguments['action']){
 			OC_Filesystem::readfile($arguments['path']);
 			exit;
 		case 'find_music':
-			echo json_encode(findMusic());
+			OC_JSON::encodedPrint(findMusic());
 			exit;
 	}
 }
diff --git a/apps/media/ajax/autoupdate.php b/apps/media/ajax/autoupdate.php
index ac3d0650b4b..ad103d1c39b 100644
--- a/apps/media/ajax/autoupdate.php
+++ b/apps/media/ajax/autoupdate.php
@@ -35,5 +35,5 @@ if(defined("DEBUG") && DEBUG) {error_log((integer)$autoUpdate);}
 
 OC_Preferences::setValue(OC_User::getUser(),'media','autoupdate',(integer)$autoUpdate);
 
-echo json_encode( array( "status" => "success", "data" => $autoUpdate));
-?>
\ No newline at end of file
+OC_JSON::success(array('data' => $autoUpdate));
+?>
diff --git a/apps/media/tomahawk.php b/apps/media/tomahawk.php
index bf0c2c2a756..1db982a3504 100644
--- a/apps/media/tomahawk.php
+++ b/apps/media/tomahawk.php
@@ -77,5 +77,5 @@ foreach($songs as $song) {
 		'score' => (float)1.0
 	);
 }
-echo json_encode($results);
-?>
\ No newline at end of file
+OC_JSON::encodedPrint($results);
+?>
diff --git a/core/ajax/grouplist.php b/core/ajax/grouplist.php
index d0d10f7a84e..cc15102bbc3 100644
--- a/core/ajax/grouplist.php
+++ b/core/ajax/grouplist.php
@@ -44,8 +44,6 @@ foreach( OC_Group::getGroups() as $i ){
         $groups[] = array( "groupname" => $i );
 }
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-echo json_encode($groups);
+OC_JSON::encodedPrint($groups);
 
 ?>
diff --git a/core/ajax/translations.php b/core/ajax/translations.php
index adaf7dcb758..2e436f8d84e 100644
--- a/core/ajax/translations.php
+++ b/core/ajax/translations.php
@@ -26,9 +26,7 @@ require_once('../../lib/base.php');
 
 $app = $_POST["app"];
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
 $l = new OC_L10N( $app );
 
-echo json_encode( array( 'status' => 'success', 'data' => $l->getTranslations()));
+OC_JSON::success(array('data' => $l->getTranslations()));
 ?>
diff --git a/core/ajax/userlist.php b/core/ajax/userlist.php
index 0485f514550..c8168eaf460 100644
--- a/core/ajax/userlist.php
+++ b/core/ajax/userlist.php
@@ -43,8 +43,6 @@ foreach( OC_User::getUsers() as $i ){
        	$users[] = array( "username" => $i, "groups" => join( ", ", OC_Group::getUserGroups( $i ) ));
 }
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-echo json_encode($users);
+OC_JSON::encodedPrint($users);
 
 ?>
diff --git a/core/ajax/validateuser.php b/core/ajax/validateuser.php
index 032948fc331..258bd50fcad 100644
--- a/core/ajax/validateuser.php
+++ b/core/ajax/validateuser.php
@@ -30,11 +30,10 @@ if(!isset($_SERVER['PHP_AUTH_USER'])){
         echo 'Valid credentials must be supplied';
         exit();
 } else {
-	header("Content-Type: application/jsonrequest");
         if(OC_User::checkPassword($_SERVER["PHP_AUTH_USER"], $_SERVER["PHP_AUTH_PW"])){
-		echo json_encode(array("username" => $_SERVER["PHP_AUTH_USER"], "user_valid" => "true"));
+		OC_JSON::encodedPrint(array("username" => $_SERVER["PHP_AUTH_USER"], "user_valid" => "true"));
 	} else {
-	        echo json_encode(array("username" => $_SERVER["PHP_AUTH_USER"], "user_valid" => "false"));
+	        OC_JSON::encodedPrint(array("username" => $_SERVER["PHP_AUTH_USER"], "user_valid" => "false"));
 	}
 }
 
diff --git a/files/ajax/autocomplete.php b/files/ajax/autocomplete.php
index 183ee86c788..8d7a5b482bd 100644
--- a/files/ajax/autocomplete.php
+++ b/files/ajax/autocomplete.php
@@ -5,14 +5,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-// header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 $query = $_GET['term'];
@@ -58,6 +51,6 @@ if(OC_Filesystem::file_exists($base) and OC_Filesystem::is_dir($base)){
 		}
 	}
 }
-echo json_encode($files);
+OC_JSON::encodedPrint($files);
 
 ?>
diff --git a/files/ajax/delete.php b/files/ajax/delete.php
index 782db215dfc..b6bc859897c 100644
--- a/files/ajax/delete.php
+++ b/files/ajax/delete.php
@@ -3,14 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 $dir = $_GET["dir"];
@@ -18,19 +11,19 @@ $files = isset($_GET["file"]) ? $_GET["file"] : $_GET["files"];
 
 $files = explode(';', $files);
 $filesWithError = '';
-$status = 'success';
+$success = true;
 //Now delete
 foreach($files as $file) {
     if( !OC_Files::delete( $dir, $file )){
 		$filesWithError .= $file . "\n";
-		$status = 'error';
+		$success = false;
 	}
 }
 
-if($status == 'success') {
-	echo json_encode( array( "status" => $status, "data" => array( "dir" => $dir, "files" => $files )));
+if(success) {
+	OC_JSON::success(array("data" => array( "dir" => $dir, "files" => $files )));
 } else {
-	echo json_encode( array( "status" => $status, "data" => array( "message" => "Could not delete:\n" . $filesWithError )));
+	OC_JSON::error(array("data" => array( "message" => "Could not delete:\n" . $filesWithError )));
 }
 
 ?>
diff --git a/files/ajax/list.php b/files/ajax/list.php
index 547bc91fb05..8a414827e1c 100644
--- a/files/ajax/list.php
+++ b/files/ajax/list.php
@@ -3,14 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Load the files
 $dir = isset( $_GET['dir'] ) ? $_GET['dir'] : '';
@@ -45,6 +38,6 @@ $list = new OC_Template( "files", "part.list", "" );
 $list->assign( "files", $files );
 $data = array('files' => $list->fetchPage());
 
-echo json_encode( array( "status" => "success", "data" => $data));
+OC_JSON::success(array('data' => $data));
 
 ?>
diff --git a/files/ajax/move.php b/files/ajax/move.php
index 4224cbce6d0..8a56a015486 100644
--- a/files/ajax/move.php
+++ b/files/ajax/move.php
@@ -3,14 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 $dir = $_GET["dir"];
@@ -19,9 +12,9 @@ $target = $_GET["target"];
 
 
 if(OC_Files::move($dir,$file,$target,$file)){
-	echo json_encode( array( "status" => 'success', "data" => array( "dir" => $dir, "files" => $file )));
+	OC_JSON::success(array("data" => array( "dir" => $dir, "files" => $file )));
 }else{
-	echo json_encode( array( "status" => 'error', "data" => array( "message" => "Could move $file" )));
+	OC_JSON::error(array("data" => array( "message" => "Could move $file" )));
 }
 
-?>
\ No newline at end of file
+?>
diff --git a/files/ajax/newfolder.php b/files/ajax/newfolder.php
index 8eb05280e73..43d87461fc7 100644
--- a/files/ajax/newfolder.php
+++ b/files/ajax/newfolder.php
@@ -3,27 +3,20 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get the params
 $dir = isset( $_GET['dir'] ) ? $_GET['dir'] : '';
 $foldername = isset( $_GET['foldername'] ) ? $_GET['foldername'] : '';
 
 if($foldername == '') {
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Empty Foldername" )));
+	OC_JSON::error(array("data" => array( "message" => "Empty Foldername" )));
 	exit();
 }
 if(defined("DEBUG") && DEBUG) {error_log('try to create ' . $foldername . ' in ' . $dir);}
 if(OC_Files::newFile($dir, $foldername, 'dir')) {
-	echo json_encode( array( "status" => "success", "data" => array()));
+	OC_JSON::success(array("data" => array()));
 	exit();
 }
 
-echo json_encode( array( "status" => "error", "data" => array( "message" => "Error when creating the folder" )));
\ No newline at end of file
+OC_JSON::error(array("data" => array( "message" => "Error when creating the folder" )));
diff --git a/files/ajax/rename.php b/files/ajax/rename.php
index 516077f6fda..87ffbc3ada0 100644
--- a/files/ajax/rename.php
+++ b/files/ajax/rename.php
@@ -3,14 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 $dir = $_GET["dir"];
@@ -19,10 +12,10 @@ $newname = $_GET["newname"];
 
 // Delete
 if( OC_Files::move( $dir, $file, $dir, $newname )) {
-	echo json_encode( array( "status" => "success", "data" => array( "dir" => $dir, "file" => $file, "newname" => $newname )));
+	OC_JSON::success(array("data" => array( "dir" => $dir, "file" => $file, "newname" => $newname )));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to rename file" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to rename file" )));
 }
 
 ?>
diff --git a/files/ajax/upload.php b/files/ajax/upload.php
index f005a8af226..041ec0c92e3 100644
--- a/files/ajax/upload.php
+++ b/files/ajax/upload.php
@@ -3,19 +3,13 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-// header( "Content-Type: application/json" );
 // Firefox and Konqueror tries to download application/json for me.  --Arthur
-header( "Content-Type: text/plain" );
+OC_JSON::setContentTypeHeader('text/plain');
 
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 if (!isset($_FILES['files'])) {
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "No file was uploaded. Unknown error" )));
+	OC_JSON::error(array("data" => array( "message" => "No file was uploaded. Unknown error" )));
 	exit();
 }
 foreach ($_FILES['files']['error'] as $error) {
@@ -28,7 +22,7 @@ foreach ($_FILES['files']['error'] as $error) {
 			4=>$l->t("No file was uploaded"),
 			6=>$l->t("Missing a temporary folder")
 		);
-		echo json_encode( array( "status" => "error", "data" => array( "message" => $errors[$error] )));
+		OC_JSON::error(array("data" => array( "message" => $errors[$error] )));
 		exit();
 	}
 }
@@ -43,7 +37,7 @@ foreach($files['size'] as $size){
 	$totalSize+=$size;
 }
 if($totalSize>OC_Filesystem::free_space('/')){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Not enough space available" )));
+	OC_JSON::error(array("data" => array( "message" => "Not enough space available" )));
 	exit();
 }
 
@@ -56,12 +50,12 @@ if(strpos($dir,'..') === false){
 			$result[]=array( "status" => "success", 'mime'=>OC_Filesystem::getMimeType($target),'size'=>OC_Filesystem::filesize($target),'name'=>$files['name'][$i]);
 		}
 	}
-	echo json_encode($result);
+	OC_JSON::encodedPrint($result);
 	exit();
 }else{
 	$error='invalid dir';
 }
 
-echo json_encode(array( 'status' => 'error', 'data' => array('error' => $error, "file" => $fileName)));
+OC_JSON::error(array('data' => array('error' => $error, "file" => $fileName)));
 
 ?>
diff --git a/lib/json.php b/lib/json.php
new file mode 100644
index 00000000000..47d5e82fbb0
--- /dev/null
+++ b/lib/json.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * Copyright (c) 2011 Bart Visscher <bartv@thisnet.nl>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+class OC_JSON{
+	static protected $send_content_type_header = false;
+	/**
+	 * set Content-Type header to jsonrequest
+	 */
+	public static function setContentTypeHeader($type='application/jsonrequest'){
+		if (!self::$send_content_type_header){
+			// We send json data
+			header( 'Content-Type: '.$type );
+			self::$send_content_type_header = true;
+		}
+	}
+
+	/**
+	* Check if the user is logged in, send json error msg if not
+	*/
+	public static function checkLoggedIn(){
+		if( !OC_User::isLoggedIn()){
+			$l = new OC_L10N('core');
+			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
+			exit();
+		}
+	}
+
+	/**
+	* Check if the user is a admin, send json error msg if not
+	*/
+	public static function checkAdminUser(){
+		self::checkLoggedIn();
+		if( !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
+			$l = new OC_L10N('core');
+			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
+			exit();
+		}
+	}
+
+	/**
+	* Send json error msg
+	*/
+	public static function error($data = array()){
+		$data['status'] = 'error';
+		self::encodedPrint($data);
+	}
+
+	/**
+	* Send json success msg
+	*/
+	public static function success($data = array()){
+		$data['status'] = 'success';
+		self::encodedPrint($data);
+	}
+
+	/**
+	* Encode and print $data in json format
+	*/
+	public static function encodedPrint($data){
+		self::setContentTypeHeader();
+		echo json_encode($data);
+	}
+}
diff --git a/search/ajax/search.php b/search/ajax/search.php
index 9472f97e189..326724d60c4 100644
--- a/search/ajax/search.php
+++ b/search/ajax/search.php
@@ -26,12 +26,12 @@
 require_once('../../lib/base.php');
 
 // Check if we are a user
-OC_Util::checkLoggedIn();
+OC_JSON::checkLoggedIn();
 
 $query=(isset($_GET['query']))?$_GET['query']:'';
 if($query){
 	$result=OC_Search::search($query);
-	echo json_encode($result);
+	OC_JSON::encodedPrint($result);
 }else{
 	echo 'false';
 }
diff --git a/settings/ajax/changepassword.php b/settings/ajax/changepassword.php
index 98218b9f89e..860ea987871 100644
--- a/settings/ajax/changepassword.php
+++ b/settings/ajax/changepassword.php
@@ -3,25 +3,23 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 $username = isset($_POST["username"]) ? $_POST["username"] : OC_User::getUser();
 $password = $_POST["password"];
 $oldPassword=isset($_POST["oldpassword"])?$_POST["oldpassword"]:'';
 
 // Check if we are a user
-if( !OC_User::isLoggedIn() || (!OC_Group::inGroup( OC_User::getUser(), 'admin' ) && ($username!=OC_User::getUser() || !OC_User::checkPassword($username,$oldPassword)))) {
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
+OC_JSON::checkLoggedIn();
+if( (!OC_Group::inGroup( OC_User::getUser(), 'admin' ) && ($username!=OC_User::getUser() || !OC_User::checkPassword($username,$oldPassword)))) {
+	OC_JSON::error( array( "data" => array( "message" => "Authentication error" )));
 	exit();
 }
 
 // Return Success story
 if( OC_User::setPassword( $username, $password )){
-	echo json_encode( array( "status" => "success", "data" => array( "username" => $username )));
+	OC_JSON::success(array("data" => array( "username" => $username )));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to change password" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to change password" )));
 }
 
 ?>
diff --git a/settings/ajax/creategroup.php b/settings/ajax/creategroup.php
index 2631937b14d..57d82e7bd94 100644
--- a/settings/ajax/creategroup.php
+++ b/settings/ajax/creategroup.php
@@ -3,12 +3,9 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
 if( !OC_User::isLoggedIn() || !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
+	OC_JSON::error(array("data" => array( "message" => "Authentication error" )));
 	exit();
 }
 
@@ -16,16 +13,16 @@ $groupname = $_POST["groupname"];
 
 // Does the group exist?
 if( in_array( $groupname, OC_Group::getGroups())){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Group already exists" )));
+	OC_JSON::error(array("data" => array( "message" => "Group already exists" )));
 	exit();
 }
 
 // Return Success story
 if( OC_Group::createGroup( $groupname )){
-	echo json_encode( array( "status" => "success", "data" => array( "groupname" => $groupname )));
+	OC_JSON::success(array("data" => array( "groupname" => $groupname )));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to add group" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to add group" )));
 }
 
 ?>
diff --git a/settings/ajax/createuser.php b/settings/ajax/createuser.php
index de52f90d4f3..1ed53efcf06 100644
--- a/settings/ajax/createuser.php
+++ b/settings/ajax/createuser.php
@@ -3,12 +3,9 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
 // Check if we are a user
 if( !OC_User::isLoggedIn() || !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
+	OC_JSON::error(array("data" => array( "message" => "Authentication error" )));
 	exit();
 }
 
@@ -21,7 +18,7 @@ $password = $_POST["password"];
 
 // Does the group exist?
 if( in_array( $username, OC_User::getUsers())){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "User already exists" )));
+	OC_JSON::error(array("data" => array( "message" => "User already exists" )));
 	exit();
 }
 
@@ -33,10 +30,10 @@ if( OC_User::createUser( $username, $password )){
 		}
 		OC_Group::addToGroup( $username, $i );
 	}
-	echo json_encode( array( "status" => "success", "data" => array( "username" => $username, "groups" => implode( ", ", OC_Group::getUserGroups( $username )))));
+	OC_JSON::success(array("data" => array( "username" => $username, "groups" => implode( ", ", OC_Group::getUserGroups( $username )))));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to add user" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to add user" )));
 }
 
 ?>
diff --git a/settings/ajax/disableapp.php b/settings/ajax/disableapp.php
index 0cf66a553f8..12f6b32a4f3 100644
--- a/settings/ajax/disableapp.php
+++ b/settings/ajax/disableapp.php
@@ -1,7 +1,7 @@
 <?php
 // Init owncloud
 require_once('../../lib/base.php');
-header( "Content-Type: application/jsonrequest" );
+OC_JSON::setContentTypeHeader();
 
 OC_App::disable($_POST['appid']);
 
diff --git a/settings/ajax/enableapp.php b/settings/ajax/enableapp.php
index eb1bfc54a04..8be80cd2ece 100644
--- a/settings/ajax/enableapp.php
+++ b/settings/ajax/enableapp.php
@@ -2,7 +2,7 @@
 
 // Init owncloud
 require_once('../../lib/base.php');
-header( "Content-Type: application/jsonrequest" );
+OC_JSON::setContentTypeHeader();
 
 OC_App::enable($_POST['appid']);
 
diff --git a/settings/ajax/openid.php b/settings/ajax/openid.php
index 021fe35d8ec..4226ae740f0 100644
--- a/settings/ajax/openid.php
+++ b/settings/ajax/openid.php
@@ -5,22 +5,15 @@ require_once('../../lib/base.php');
 
 $l=new OC_L10N('settings');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Authentication error") )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 if( isset( $_POST['identity'] ) ){
 	$identity=$_POST['identity'];
 	OC_Preferences::setValue(OC_User::getUser(),'user_openid','identity',$identity);
-	echo json_encode( array( "status" => "success", "data" => array( "message" => $l->t("OpenID Changed") )));
+	OC_JSON::success(array("data" => array( "message" => $l->t("OpenID Changed") )));
 }else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Invalid request") )));
+	OC_JSON::error(array("data" => array( "message" => $l->t("Invalid request") )));
 }
 
 ?>
diff --git a/settings/ajax/removegroup.php b/settings/ajax/removegroup.php
index bf80da741c7..4d364781894 100644
--- a/settings/ajax/removegroup.php
+++ b/settings/ajax/removegroup.php
@@ -3,23 +3,16 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn() || !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkAdminUser();
 
 $name = $_POST["groupname"];
 
 // Return Success story
 if( OC_Group::deleteGroup( $name )){
-	echo json_encode( array( "status" => "success", "data" => array( "groupname" => $name )));
+	OC_JSON::success(array("data" => array( "groupname" => $name )));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to delete group" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to delete group" )));
 }
 
 ?>
diff --git a/settings/ajax/removeuser.php b/settings/ajax/removeuser.php
index 0a94884cb96..2c288997a1f 100644
--- a/settings/ajax/removeuser.php
+++ b/settings/ajax/removeuser.php
@@ -3,23 +3,16 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn() || !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkAdminUser();
 
 $username = $_POST["username"];
 
 // Return Success story
 if( OC_User::deleteUser( $username )){
-	echo json_encode( array( "status" => "success", "data" => array( "username" => $username )));
+	OC_JSON::success(array("data" => array( "username" => $username )));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to delete user" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to delete user" )));
 }
 
 ?>
diff --git a/settings/ajax/setlanguage.php b/settings/ajax/setlanguage.php
index a5ba3d81ba3..dc1128de2e5 100644
--- a/settings/ajax/setlanguage.php
+++ b/settings/ajax/setlanguage.php
@@ -5,22 +5,15 @@ require_once('../../lib/base.php');
 
 $l=new OC_L10N('settings');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn()){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Authentication error") )));
-	exit();
-}
+OC_JSON::checkLoggedIn();
 
 // Get data
 if( isset( $_POST['lang'] ) ){
 	$lang=$_POST['lang'];
 	OC_Preferences::setValue( OC_User::getUser(), 'core', 'lang', $lang );
-	echo json_encode( array( "status" => "success", "data" => array( "message" => $l->t("Language changed") )));
+	OC_JSON::success(array("data" => array( "message" => $l->t("Language changed") )));
 }else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => $l->t("Invalid request") )));
+	OC_JSON::error(array("data" => array( "message" => $l->t("Invalid request") )));
 }
 
 ?>
diff --git a/settings/ajax/setquota.php b/settings/ajax/setquota.php
index 244a85e3d9c..edbf5b74516 100644
--- a/settings/ajax/setquota.php
+++ b/settings/ajax/setquota.php
@@ -3,20 +3,13 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn() || !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkAdminUser();
 
 $username = $_POST["username"];
 $quota= OC_Helper::computerFileSize($_POST["quota"]);
 
 // Return Success story
 OC_Preferences::setValue($username,'files','quota',$quota);
-echo json_encode( array( "status" => "success", "data" => array( "username" => $username ,'quota'=>$quota)));
+OC_JSON::success(array("data" => array( "username" => $username ,'quota'=>$quota)));
 
 ?>
diff --git a/settings/ajax/togglegroups.php b/settings/ajax/togglegroups.php
index 3210252af02..3ee3239dd89 100644
--- a/settings/ajax/togglegroups.php
+++ b/settings/ajax/togglegroups.php
@@ -3,14 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-// We send json data
-header( "Content-Type: application/jsonrequest" );
-
-// Check if we are a user
-if( !OC_User::isLoggedIn() || !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Authentication error" )));
-	exit();
-}
+OC_JSON::checkAdminUser();
 
 $success = true;
 $error = "add user to";
@@ -39,10 +32,10 @@ else{
 
 // Return Success story
 if( $success ){
-	echo json_encode( array( "status" => "success", "data" => array( "username" => $username, "action" => $action, "groupname" => $group )));
+	OC_JSON::success(array("data" => array( "username" => $username, "action" => $action, "groupname" => $group )));
 }
 else{
-	echo json_encode( array( "status" => "error", "data" => array( "message" => "Unable to $error group $group" )));
+	OC_JSON::error(array("data" => array( "message" => "Unable to $error group $group" )));
 }
 
 ?>
diff --git a/settings/templates/apps.php b/settings/templates/apps.php
index d8f3fb5e4f8..ba2385d794f 100644
--- a/settings/templates/apps.php
+++ b/settings/templates/apps.php
@@ -12,7 +12,7 @@
 	<li <?php if($app['active']) echo 'class="active"'?> data-id="<?php echo $app['id'] ?>">
 		<?php  echo $app['name'] ?>
 		<span class="hidden">
-			<?php echo json_encode($app) ?>
+			<?php OC_JSON::encodedPrint($app) ?>
 		</span>
 	</li>
 	<?php endforeach;?>