| // Copyright (C) 2017 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 static java.util.stream.Collectors.joining; |
| |
| import com.google.common.flogger.FluentLogger; |
| import com.google.gerrit.mail.MailMessage; |
| import com.google.gerrit.server.config.GerritServerConfig; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import java.util.Arrays; |
| import java.util.regex.Pattern; |
| import org.eclipse.jgit.lib.Config; |
| |
| @Singleton |
| public class ListMailFilter implements MailFilter { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| public enum ListFilterMode { |
| OFF, |
| ALLOW, |
| BLOCK |
| } |
| |
| private final ListFilterMode mode; |
| private final Pattern mailPattern; |
| |
| @Inject |
| ListMailFilter(@GerritServerConfig Config cfg) { |
| mode = getListFilterMode(cfg); |
| String[] addresses = cfg.getStringList("receiveemail", "filter", "patterns"); |
| String concat = Arrays.asList(addresses).stream().collect(joining("|")); |
| this.mailPattern = Pattern.compile(concat); |
| } |
| |
| private static final String LEGACY_ALLOW = "WHITELIST"; |
| private static final String LEGACY_BLOCK = "BLACKLIST"; |
| |
| /** Legacy names are supported, but should be removed in the future. */ |
| private ListFilterMode getListFilterMode(Config cfg) { |
| ListFilterMode mode; |
| String modeString = cfg.getString("receiveemail", "filter", "mode"); |
| if (modeString == null) { |
| modeString = ""; |
| } |
| switch (modeString) { |
| case LEGACY_ALLOW: |
| case "ALLOW": |
| mode = ListFilterMode.ALLOW; |
| break; |
| case LEGACY_BLOCK: |
| case "BLOCK": |
| mode = ListFilterMode.BLOCK; |
| break; |
| default: |
| mode = ListFilterMode.OFF; |
| } |
| return mode; |
| } |
| |
| @Override |
| public boolean shouldProcessMessage(MailMessage message) { |
| if (mode == ListFilterMode.OFF) { |
| return true; |
| } |
| |
| boolean match = mailPattern.matcher(message.from().email()).find(); |
| if ((mode == ListFilterMode.ALLOW && !match) || (mode == ListFilterMode.BLOCK && match)) { |
| logger.atInfo().log("Mail message from %s rejected by list filter", message.from()); |
| return false; |
| } |
| return true; |
| } |
| } |