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OWASP CSRFGuard is a library that implements a variant of the synchronizer token pattern to mitigate the risk of Cross-Site Request Forgery (CSRF) attacks.

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/*
 * The OWASP CSRFGuard Project, BSD License
 * Copyright (c) 2011, Eric Sheridan ([email protected])
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     1. Redistributions of source code must retain the above copyright notice,
 *        this list of conditions and the following disclaimer.
 *     2. Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *     3. Neither the name of OWASP nor the names of its contributors may be used
 *        to endorse or promote products derived from this software without specific
 *        prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.owasp.csrfguard.config.properties.javascript;

import org.owasp.csrfguard.config.properties.PropertyUtils;

import javax.servlet.ServletConfig;
import java.util.Properties;

public class StringJsConfigParameter extends JsConfigParameter {

    private final String propertyName;
    private final String propertyKey;
    private final String defaultValue;

    public StringJsConfigParameter(final String propertyName, final String propertyKey, final String defaultValue) {
        this.propertyName = propertyName;
        this.propertyKey = propertyKey;
        this.defaultValue = defaultValue;
    }

    @Override
    public String getProperty(final ServletConfig servletConfig, final Properties propertyCache) {
        final String configParamValue = PropertyUtils.getProperty(propertyCache, this.propertyKey);
        return getInitParameter(servletConfig, this.propertyName, configParamValue, this.defaultValue);
    }
}