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0002616: Tighten up default Jetty HTTP security settings
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87 changes: 87 additions & 0 deletions
87
symmetric-server/src/main/java/org/jumpmind/symmetric/web/HttpMethodFilter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /** | ||
| * Licensed to JumpMind Inc under one or more contributor | ||
| * license agreements. See the NOTICE file distributed | ||
| * with this work for additional information regarding | ||
| * copyright ownership. JumpMind Inc licenses this file | ||
| * to you under the GNU General Public License, version 3.0 (GPLv3) | ||
| * (the "License"); you may not use this file except in compliance | ||
| * with the License. | ||
| * | ||
| * You should have received a copy of the GNU General Public License, | ||
| * version 3.0 (GPLv3) along with this library; if not, see | ||
| * <http://www.gnu.org/licenses/>. | ||
| * | ||
| * 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 org.jumpmind.symmetric.web; | ||
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| import java.io.IOException; | ||
| import java.util.HashSet; | ||
| import java.util.Set; | ||
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| import javax.servlet.Filter; | ||
| import javax.servlet.FilterChain; | ||
| import javax.servlet.FilterConfig; | ||
| import javax.servlet.ServletException; | ||
| import javax.servlet.ServletRequest; | ||
| import javax.servlet.ServletResponse; | ||
| import javax.servlet.http.HttpServletRequest; | ||
| import javax.servlet.http.HttpServletResponse; | ||
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| import org.apache.commons.lang.StringUtils; | ||
|
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| public class HttpMethodFilter implements Filter { | ||
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| private Set<String> allowedMethods = new HashSet<String>(); | ||
| private Set<String> disallowedMethods = new HashSet<String>(); | ||
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| @Override | ||
| public void init(FilterConfig filterConfig) throws ServletException { | ||
| String allowMethodsConfig = filterConfig.getInitParameter("server.allow.http.methods"); | ||
| loadMethods(allowMethodsConfig, allowedMethods); | ||
| String disallowMethodsConfig = filterConfig.getInitParameter("server.disallow.http.methods"); | ||
| loadMethods(disallowMethodsConfig, disallowedMethods); | ||
| } | ||
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| @Override | ||
| public void doFilter(ServletRequest request, ServletResponse response, | ||
| FilterChain filterChain) throws IOException, ServletException { | ||
| HttpServletRequest httpRequest = (HttpServletRequest) request; | ||
| String method = httpRequest.getMethod().toUpperCase(); | ||
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| if (disallowedMethods.contains(method)) { | ||
| forbid(method, request, response); | ||
| } else if (!allowedMethods.isEmpty() && !allowedMethods.contains(method)) { | ||
| forbid(method, request, response); | ||
| } else { | ||
| filterChain.doFilter(request, response); | ||
| } | ||
| } | ||
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| protected void forbid(String method, ServletRequest request, ServletResponse response) throws IOException { | ||
| HttpServletResponse httpResponse = (HttpServletResponse)response; | ||
| httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN, "Method " + method + " is not allowed."); | ||
| } | ||
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| protected void loadMethods(String configuredValue, Set<String> methods) { | ||
| if (!StringUtils.isEmpty(configuredValue)) { | ||
| String[] methodsSplit = configuredValue.split(","); | ||
| for (String method : methodsSplit) { | ||
| if (!StringUtils.isEmpty(method)) { | ||
| methods.add(method.toUpperCase()); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| public void destroy() { | ||
| // Empty. | ||
| } | ||
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| } |