org.italiangrid.storm.webdav.authz.util.HeaderRegexMatcher.java Source code

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Here is the source code for org.italiangrid.storm.webdav.authz.util.HeaderRegexMatcher.java

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/**
 * Copyright (c) Istituto Nazionale di Fisica Nucleare, 2014.
 *
 * 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 org.italiangrid.storm.webdav.authz.util;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.web.util.matcher.RequestMatcher;
import org.springframework.util.AntPathMatcher;

public class HeaderRegexMatcher implements RequestMatcher {

    private static final Logger logger = LoggerFactory.getLogger(HeaderRegexMatcher.class);

    private final String headerName;
    private final String pattern;

    private final AntPathMatcher matcher;

    public HeaderRegexMatcher(String headerName, String expression) {

        this.headerName = headerName;
        this.pattern = expression;
        this.matcher = new AntPathMatcher();
    }

    @Override
    public boolean matches(HttpServletRequest request) {

        String headerValue = request.getHeader(headerName);
        if (headerValue != null) {

            boolean matches = matcher.match(pattern, headerValue);

            if (logger.isDebugEnabled()) {

                logger.debug("Request header value {} {} match with pattern {}", headerValue,
                        (matches ? "does" : "does not"), pattern);
            }
            return matches;
        }
        return false;
    }

    @Override
    public String toString() {

        return String.format("HeaderRequestMatcher [header name=%s, pattern=%s]", headerName, pattern);
    }
}