Make OC_Connector_Sabre_File::get() return a PHP stream instead of the file content, as is recommended by SabreDAV to handle large files.

lib/connector/sabre/file.php

@@ -29,7 +29,7 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 	 */
 	public function get() {
 
-		return OC_Filesystem::file_get_contents($this->path);
+		return OC_Filesystem::fopen($this->path,'r');
 
 	}