org.opf_labs.fmts.fidget.droid.PRONOMSigGenerator.java Source code

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Here is the source code for org.opf_labs.fmts.fidget.droid.PRONOMSigGenerator.java

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/**
 * Copyright (C) 2012 Andrew Jackson <Andrew.Jackson@bl.uk>
 *
 * 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.opf_labs.fmts.fidget.droid;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.IOUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * This class can be used to generate a DROID signature file using the TNA's web
 * service.
 * 
 * @author Andrew Jackson <Andrew.Jackson@bl.uk>
 * 
 */
public class PRONOMSigGenerator {
    /** String form of the URL of the PRONOM Sig file generation service. */
    public static final String SERVICE_URL = "http://test.linkeddatapronom.nationalarchives.gov.uk/sigdev/php/process_signature_form.php";

    /**
     * @param sigdef
     */
    public static void generatePRONOMSigFile(SigDefSubmission sigdef) {
        DefaultHttpClient httpclient = new DefaultHttpClient();
        try {

            HttpPost httpost = new HttpPost(SERVICE_URL);

            httpost.setEntity(new UrlEncodedFormEntity(createNameValuePairs(sigdef), Consts.UTF_8));

            HttpResponse response = httpclient.execute(httpost);
            HttpEntity entity = response.getEntity();

            // Print out:
            IOUtils.copy(entity.getContent(), System.out);
            // Finish up:
            EntityUtils.consume(entity);

        } catch (ClientProtocolException e) {
            e.printStackTrace();

        } catch (IOException e) {
            e.printStackTrace();

        } finally {
            // When HttpClient instance is no longer needed,
            // shut down the connection manager to ensure
            // immediate deallocation of all system resources
            httpclient.getConnectionManager().shutdown();
        }
    }

    private static List<NameValuePair> createNameValuePairs(SigDefSubmission sigDef) {
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("name1", sigDef.getName()));
        nvps.add(new BasicNameValuePair("version1", sigDef.getVersion()));
        nvps.add(new BasicNameValuePair("puid1", sigDef.getPuid()));
        nvps.add(new BasicNameValuePair("extension1", sigDef.getExtension()));
        nvps.add(new BasicNameValuePair("mimetype1", sigDef.getMimetype()));
        // Counter of sigs
        nvps.add(new BasicNameValuePair("counter", "" + sigDef.getSignatures().size()));
        System.out.println("Got: " + sigDef.getSignatures().size());
        // For each sig:
        int sigNo = 1;
        for (InternalSig intSig : sigDef.getSignatures()) {
            nvps.add(new BasicNameValuePair("signature" + sigNo, intSig.getSignature()));
            System.out.println("Sig: " + intSig.getSignature());
            nvps.add(new BasicNameValuePair("anchor" + sigNo, "" + intSig.getAnchor())); // BOFoffset, EOFoffset, Variable
            nvps.add(new BasicNameValuePair("offset" + sigNo, "" + intSig.getOffset()));
            nvps.add(new BasicNameValuePair("offset" + sigNo, "" + intSig.getMaxOffset()));
            sigNo++;
        }
        return nvps;
    }

    /**
     * @param args
     * @throws IOException
     * @throws ClientProtocolException
     */
    public static void main(String[] args) throws ClientProtocolException, IOException {
        SigDefSubmission sigDef = SigDefSubmission.empty().addSig(InternalSig.canonicalInst()).build();
        PRONOMSigGenerator.generatePRONOMSigFile(sigDef);
    }

}