Use POST for refresh/check-recent request

program/js/app.js

@@ -2180,7 +2180,7 @@ function rcube_webmail()
     var lock = this.set_busy(true, 'checkingmail'),
       params = this.check_recent_params();
 
-    this.http_request('check-recent', params, lock);
+    this.http_post('check-recent', params, lock);
   };
 
   // list messages of a specific mailbox using filter
@@ -7500,7 +7500,7 @@ function rcube_webmail()
     this.env.lastrefresh = new Date();
 
     // plugins should bind to 'requestrefresh' event to add own params
-    this.http_request('refresh', params, lock);
+    this.http_post('refresh', params, lock);
   };
 
   // returns check-recent request parameters

program/steps/mail/check_recent.inc

@@ -21,7 +21,7 @@
 
 // If there's no folder or messages list, there's nothing to update
 // This can happen on 'refresh' request
-if (empty($_REQUEST['_folderlist']) && empty($_REQUEST['_list'])) {
+if (empty($_POST['_folderlist']) && empty($_POST['_list'])) {
     return;
 }
 
@@ -30,8 +30,9 @@ $current   = $RCMAIL->storage->get_folder();
 $check_all = $RCMAIL->action != 'refresh' || (bool)$RCMAIL->config->get('check_all_folders');
 
 $search_request = rcube_utils::get_input_value('_search', rcube_utils::INPUT_GPC);
-if ($search_request && $_SESSION['search_request'] != $search_request)
+if ($search_request && $_SESSION['search_request'] != $search_request) {
     $search_request = null;
+}
 
 // list of folders to check
 if ($check_all) {
@@ -80,14 +81,16 @@ foreach ($a_mailboxes as $mbox_name) {
                 $mbox_name = '';
         }
 
-        if (!empty($_GET['_quota']))
+        if (!empty($_POST['_quota'])) {
             $OUTPUT->command('set_quota', $RCMAIL->quota_content());
+        }
 
         $OUTPUT->set_env('exists', $RCMAIL->storage->count($mbox_name, 'EXISTS'));
 
         // "No-list" mode, don't get messages
-        if (empty($_GET['_list']))
+        if (empty($_POST['_list'])) {
             continue;
+        }
 
         // get overall message count; allow caching because rcube_storage::folder_status()
         // did a refresh but only in list mode