private Response doGet(HttpExchange httpExchange) {
String query = httpExchange.getRequestURI().getQuery();
if (query == null) {
return Response.badRequest("Absent query in request");
}
Map<String, String> map = queryToMap(query);
String token = map.get(Constants.REQUEST_PARAM_TOKEN);
if (StringUtils.isEmpty(token)) {
return Response.badRequest("Token query parameter is required");
}
try {
int index = MessageHelper.parseToken(token);
if (index > messageStorage.size()) {
return Response.badRequest(
String.format(
"Incorrect token in request: %s. Server does not have so many messages", token));
}
Portion portion = new Portion(index);
List<Message> messages = messageStorage.getPortion(portion);
String responseBody = MessageHelper.buildServerResponseBody(messages, messageStorage.size());
return Response.ok(responseBody);
} catch (InvalidTokenException e) {
return Response.badRequest(e.getMessage());
}
}
