com.appslandia.plum.base.HstsPolicy Maven / Gradle / Ivy

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// The MIT License (MIT)
// Copyright © 2015 AppsLandia. All rights reserved.

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package com.appslandia.plum.base;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.appslandia.common.utils.AssertUtils;
import com.appslandia.plum.utils.ServletUtils;

/**
 *
 * @author Loc Ha
 *
 */
public class HstsPolicy implements HeaderPolicy {

	final String hsts;
	final boolean enableLocal;

	public HstsPolicy(HstsBuilder builder) {
		this(builder, false);
	}

	public HstsPolicy(HstsBuilder builder, boolean enableLocal) {
		this.hsts = AssertUtils.assertNotNull(builder.toString());
		this.enableLocal = enableLocal;
	}

	@Override
	public void writePolicy(HttpServletRequest request, HttpServletResponse response) {
		if (!request.isSecure()) {
			return;
		}

		if (!isLocalhost(request) || this.enableLocal) {
			response.setHeader("Strict-Transport-Security", this.hsts);
		}
	}

	protected boolean isLocalhost(HttpServletRequest request) {
		return ServletUtils.isLocalhost(request);
	}
}