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Server functionality for HBase

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.hadoop.hbase.util;

import org.mortbay.jetty.security.Constraint;
import org.mortbay.jetty.security.ConstraintMapping;
import org.mortbay.jetty.security.SecurityHandler;
import org.mortbay.jetty.servlet.Context;

/**
 * HttpServer utility.
 */
public class HttpServerUtil {
  /**
   * Add constraints to a Jetty Context to disallow undesirable Http methods.
   * @param context The context to modify
   */
  public static void constrainHttpMethods(Context context) {
    Constraint c = new Constraint();
    c.setAuthenticate(true);

    ConstraintMapping cmt = new ConstraintMapping();
    cmt.setConstraint(c);
    cmt.setMethod("TRACE");
    cmt.setPathSpec("/*");

    ConstraintMapping cmo = new ConstraintMapping();
    cmo.setConstraint(c);
    cmo.setMethod("OPTIONS");
    cmo.setPathSpec("/*");

    SecurityHandler sh = new SecurityHandler();
    sh.setConstraintMappings(new ConstraintMapping[]{ cmt, cmo });

    context.addHandler(sh);
  }
}