| // Copyright (C) 2018 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.server.mail; |
| |
| import com.google.common.flogger.FluentLogger; |
| import com.google.gerrit.mail.MailHeader; |
| import com.google.gerrit.mail.MailMessage; |
| import com.google.inject.Singleton; |
| |
| /** Filters out auto-reply messages according to RFC 3834. */ |
| @Singleton |
| public class AutoReplyMailFilter implements MailFilter { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| @Override |
| public boolean shouldProcessMessage(MailMessage message) { |
| for (String header : message.additionalHeaders()) { |
| if (header.startsWith(MailHeader.PRECEDENCE.fieldWithDelimiter())) { |
| String prec = header.substring(MailHeader.PRECEDENCE.fieldWithDelimiter().length()).trim(); |
| |
| if (prec.equals("list") || prec.equals("junk") || prec.equals("bulk")) { |
| logger.atSevere().log( |
| "Message %s has a Precedence header. Will ignore and delete message.", message.id()); |
| return false; |
| } |
| |
| } else if (header.startsWith(MailHeader.AUTO_SUBMITTED.fieldWithDelimiter())) { |
| String autoSubmitted = |
| header.substring(MailHeader.AUTO_SUBMITTED.fieldWithDelimiter().length()).trim(); |
| |
| if (!autoSubmitted.equals("no")) { |
| logger.atSevere().log( |
| "Message %s has an Auto-Submitted header. Will ignore and delete message.", |
| message.id()); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| } |