org.italiangrid.storm.webdav.authz.vomap.MapfileVOMembershipSource.java Source code

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Here is the source code for org.italiangrid.storm.webdav.authz.vomap.MapfileVOMembershipSource.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.vomap;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;
import org.apache.commons.csv.CSVRecord;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.Assert;

import eu.emi.security.authn.x509.impl.OpensslNameUtils;

public class MapfileVOMembershipSource implements VOMembershipSource {

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

    private final String voName;
    private final File mapFile;

    public MapfileVOMembershipSource(String voName, File mapFile) {

        Assert.hasText(voName);
        Assert.notNull(mapFile);

        this.voName = voName;
        this.mapFile = mapFile;

    }

    private CSVParser getParser() {

        try {
            return new CSVParser(new FileReader(mapFile), CSVFormat.DEFAULT);
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    private boolean isValidCSVRecord(CSVRecord r) {

        if (r.size() > 3) {
            logger.debug("Invalid CSVRecord: {}. Illegal size: {}", r, r.size());
            return false;
        }

        if (!r.get(0).startsWith("/")) {
            logger.debug("Invalid CSVRecord: {}. Subject does not start with / : {}", r, r.get(0));
            return false;
        }

        return true;
    }

    @Override
    public Set<String> getVOMembers() {

        long startTime = System.currentTimeMillis();

        Set<String> subjects = new HashSet<String>();

        CSVParser parser = getParser();

        try {

            List<CSVRecord> records = parser.getRecords();

            for (CSVRecord r : records) {

                if (logger.isDebugEnabled()) {
                    logger.debug("Parsed record: {} for VO {}", r, voName);
                }

                if (!isValidCSVRecord(r)) {
                    break;
                }

                String subject = r.get(0);

                if (logger.isDebugEnabled()) {
                    logger.debug("Parsed subject {} as member of VO {}", subject, voName);
                }

                @SuppressWarnings("deprecation")
                String rfcSubject = OpensslNameUtils.opensslToRfc2253(subject);

                if (logger.isDebugEnabled()) {
                    logger.debug("Converted subject {} to rfc format {}", subject, rfcSubject);
                }

                subjects.add(rfcSubject);
            }

        } catch (IOException e) {
            throw new RuntimeException(e);
        }

        long totalTime = System.currentTimeMillis() - startTime;

        logger.debug("Parsing VO {} members from {} took {} msecs.", voName, mapFile, totalTime);

        return subjects;
    }

    @Override
    public String getVOName() {

        return voName;
    }

}