org.casbah.provider.openssl.OpenSslWrapper.java Source code

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Here is the source code for org.casbah.provider.openssl.OpenSslWrapper.java

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/*******************************************************************************
 * Copyright (C) 2010 Marco Sandrini
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public
 * License along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.casbah.provider.openssl;

import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.TimeUnit;

import org.apache.commons.io.IOUtils;

public class OpenSslWrapper {

    private static final String CASBAH_SSL_CA_ROOT = "CASBAH_SSL_CA_ROOT";
    private final String opensslExecutable;
    private final File caRootDir;
    private static final long TIMEOUT = 60;

    public OpenSslWrapper(String opensslExecutable, File caRootDir) {
        this.opensslExecutable = opensslExecutable;
        this.caRootDir = caRootDir;

    }

    public int executeCommand(String input, StringBuffer output, StringBuffer error, final List<String> parameters)
            throws IOException, InterruptedException {
        ByteArrayInputStream bais = null;
        ByteArrayOutputStream outputStream = null;
        ByteArrayOutputStream errorStream = null;
        if (input != null) {
            bais = new ByteArrayInputStream(input.getBytes());
        }
        try {
            outputStream = new ByteArrayOutputStream();
            errorStream = new ByteArrayOutputStream();
            int result = executeCommand(bais, outputStream, errorStream, parameters);
            output.append(outputStream.toString());
            error.append(errorStream.toString());
            return result;
        } finally {
            IOUtils.closeQuietly(bais);
            IOUtils.closeQuietly(outputStream);
            IOUtils.closeQuietly(errorStream);
        }
    }

    public int executeCommand(StringBuffer output, StringBuffer error, final List<String> parameters)
            throws IOException, InterruptedException {
        return executeCommand(null, output, error, parameters);
    }

    public int executeCommand(InputStream input, OutputStream output, OutputStream error,
            final List<String> parameters) throws IOException, InterruptedException {
        List<String> fullParams = new ArrayList<String>(parameters);
        fullParams.add(0, opensslExecutable);
        ProcessBuilder processBuilder = new ProcessBuilder(fullParams);
        CyclicBarrier barrier = new CyclicBarrier(3);
        Map<String, String> env = processBuilder.environment();
        env.put(CASBAH_SSL_CA_ROOT, caRootDir.getAbsolutePath());
        Process proc = processBuilder.start();
        if (input != null) {
            BufferedOutputStream stdin = new BufferedOutputStream(proc.getOutputStream());
            IOUtils.copy(input, stdin);
            stdin.flush();
        }
        StreamConsumer outputConsumer = new StreamConsumer(output, proc.getInputStream(), barrier, TIMEOUT);
        StreamConsumer errorConsumer = new StreamConsumer(error, proc.getErrorStream(), barrier, TIMEOUT);
        outputConsumer.start();
        errorConsumer.start();
        int returnValue = proc.waitFor();
        try {
            barrier.await(TIMEOUT, TimeUnit.SECONDS);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

}