com.google.gerrit.server.git.validators.CommentSizeValidator Maven / Gradle / Ivy
// Copyright (C) 2020 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.git.validators;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.extensions.validators.CommentForValidation;
import com.google.gerrit.extensions.validators.CommentValidationContext;
import com.google.gerrit.extensions.validators.CommentValidationFailure;
import com.google.gerrit.extensions.validators.CommentValidator;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.inject.Inject;
import org.eclipse.jgit.lib.Config;
/** Limits the size of comments to prevent space/time complexity issues. */
public class CommentSizeValidator implements CommentValidator {
private final int commentSizeLimit;
private final int robotCommentSizeLimit;
@Inject
CommentSizeValidator(@GerritServerConfig Config serverConfig) {
commentSizeLimit = serverConfig.getInt("change", "commentSizeLimit", 16 << 10);
robotCommentSizeLimit = serverConfig.getInt("change", "robotCommentSizeLimit", 1 << 20);
}
@Override
public ImmutableList validateComments(
CommentValidationContext ctx, ImmutableList comments) {
return comments.stream()
.filter(this::exceedsSizeLimit)
.map(c -> c.failValidation(buildErrorMessage(c)))
.collect(ImmutableList.toImmutableList());
}
private boolean exceedsSizeLimit(CommentForValidation comment) {
switch (comment.getSource()) {
case HUMAN:
return comment.getApproximateSize() > commentSizeLimit;
case ROBOT:
return robotCommentSizeLimit > 0 && comment.getApproximateSize() > robotCommentSizeLimit;
}
throw new RuntimeException(
"Unknown comment source (should not have compiled): " + comment.getSource());
}
private String buildErrorMessage(CommentForValidation comment) {
switch (comment.getSource()) {
case HUMAN:
return String.format(
"Comment size exceeds limit (%d > %d)", comment.getApproximateSize(), commentSizeLimit);
case ROBOT:
return String.format(
"Size %d (bytes) of robot comment is greater than limit %d (bytes)",
comment.getApproximateSize(), robotCommentSizeLimit);
}
throw new RuntimeException(
"Unknown comment source (should not have compiled): " + comment.getSource());
}
}