| // 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); |
| } |
| } |
| } |