private void getUploadUrl ( HttpServletRequest req , HttpServletResponse resp ) throws ServletException , IOException { LOGGER . debug ( "Get blobstore upload url" ) ; String callback = req . getParameter ( CALLBACK_PARAM ) ; if ( null == callback ) { callback = req . getRequestURI ( ) ; } String keepQueryParam = req . getParameter ( KEEP_QUERY_PARAM ) ; // Forward any existing query parameters, e.g. access_token if ( null != keepQueryParam ) { final String queryString = req . getQueryString ( ) ; callback = String . format ( "%s?%s" , callback , null != queryString ? queryString : "" ) ; } Map < String , String > response = ImmutableMap . of ( "uploadUrl" , blobstoreService . createUploadUrl ( callback ) ) ; PrintWriter out = resp . getWriter ( ) ; resp . setContentType ( JsonCharacterEncodingResponseFilter . APPLICATION_JSON_UTF8 ) ; ObjectMapper mapper = new ObjectMapper ( ) ; mapper . writeValue ( out , response ) ; out . close ( ) ; }
Get an upload URL