diff --git a/inc/DAVResource.php b/inc/DAVResource.php
index 2361d5b1..578265a4 100644
--- a/inc/DAVResource.php
+++ b/inc/DAVResource.php
@@ -265,6 +265,8 @@ class DAVResource
       }
       else if ( $this->_is_proxy_request ) {
         $this->resourcetypes  = $this->collection->resourcetypes;
+        preg_match( '#^/[^/]+/calendar-proxy-(read|write)/?[^/]*$#', $this->dav_name, $matches );
+        $this->proxy_type = $matches[1];
       }
       if ( isset($this->collection->dav_displayname) ) $this->collection->displayname = $this->collection->dav_displayname;
     }
@@ -1103,6 +1105,18 @@ EOQRY;
   }
 
 
+  /**
+  * Checks whether this resource is a proxy collection
+  * @param string $type The type of proxy collection, 'read', 'write' or 'any'
+  */
+  function IsProxyCollection( $type = 'any' ) {
+    if ( $this->_is_proxy_request ) {
+      return ($type == 'any' || $type == $this->proxy_type);
+    }
+    return false;
+  }
+
+
   /**
   * Checks whether this resource is a scheduling inbox/outbox collection
   * @param string $type The type of scheduling collection, 'inbox', 'outbox' or 'any'