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// 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.httpd;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.inject.Inject;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jgit.lib.Config;
public class AllowRenderInFrameFilter extends AllRequestFilter {
static final String X_FRAME_OPTIONS_HEADER_NAME = "X-Frame-Options";
public static enum XFrameOption {
ALLOW,
SAMEORIGIN;
}
private final String xframeOptionString;
private final boolean skipXFrameOption;
@Inject
public AllowRenderInFrameFilter(@GerritServerConfig Config cfg) {
XFrameOption xframeOption =
cfg.getEnum("gerrit", null, "xframeOption", XFrameOption.SAMEORIGIN);
boolean canLoadInIFrame = cfg.getBoolean("gerrit", "canLoadInIFrame", false);
xframeOptionString = canLoadInIFrame ? xframeOption.name() : "DENY";
skipXFrameOption = xframeOption.equals(XFrameOption.ALLOW) && canLoadInIFrame;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (skipXFrameOption) {
chain.doFilter(request, response);
} else {
HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.addHeader(X_FRAME_OPTIONS_HEADER_NAME, xframeOptionString);
chain.doFilter(request, httpResponse);
}
}
}
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