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/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * 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.alibaba.csp.sentinel.adapter.spring.webmvc.callback;

import javax.servlet.http.HttpServletRequest;

/**
 * The origin parser parses request origin (e.g. IP, user, appName) from HTTP request.
 *
 * @author kaizi2009
 */
public interface RequestOriginParser {

    /**
     * Parse the origin from given HTTP request.
     *
     * @param request HTTP request
     * @return parsed origin
     */
    String parseOrigin(HttpServletRequest request);
}