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/*
 * Copyright 2011 ArcBees Inc.
 *
 * 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.gwtplatform.dispatch.client;

import com.google.gwt.user.client.Cookies;
import com.google.inject.Inject;
import com.gwtplatform.dispatch.shared.SecurityCookie;
import com.gwtplatform.dispatch.shared.SecurityCookieAccessor;

/**
 * This class provides access to the session id client side by looking into a cookie on the browser. This will work to
 * prevent XSRF attack.
 * 
 * To use this class you have to bind a constant string annotated with {@code @}{@link SecurityCookie} to your desired
 * cookie name.
 */
public class DefaultSecurityCookieAccessor implements SecurityCookieAccessor {
    @Inject(optional = true)
    @SecurityCookie
    public String cookieName;

    public String getCookieContent() {
        if (cookieName == null) {
            return null;
        }
        return Cookies.getCookie(cookieName);
    }
}