/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.geoserver.wcs.response;
import java.io.IOException;
import java.io.OutputStream;
import javax.activation.DataHandler;
import javax.mail.BodyPart;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import net.opengis.wcs11.GetCoverageType;
import org.geoserver.catalog.Catalog;
import org.geoserver.catalog.CoverageInfo;
import org.geoserver.ows.Response;
import org.geoserver.platform.Operation;
import org.geoserver.platform.ServiceException;
import org.geoserver.wcs.response.CoveragesHandler.CoveragesData;
import org.geotools.coverage.grid.GridCoverage2D;
import org.opengis.coverage.grid.GridCoverage;
import org.vfny.geoserver.wcs.WcsException;
import org.vfny.geoserver.wcs.responses.CoverageResponseDelegate;
import org.vfny.geoserver.wcs.responses.CoverageResponseDelegateFactory;
public class WCSMultipartResponse extends Response {
MimeMultipart multipart;
Catalog catalog;
public WCSMultipartResponse(Catalog catalog) {
super(GridCoverage[].class);
this.catalog = catalog;
this.multipart = new MimeMultipart();
}
@Override
public String getMimeType(Object value, Operation operation) throws ServiceException {
// javamail outputs multipart/mixed, but in our case we're producing multipart/related
return multipart.getContentType().replace("mixed", "related");
}
@Override
public String[][] getHeaders(Object value, Operation operation) throws ServiceException {
final GetCoverageType request = (GetCoverageType) operation.getParameters()[0];
final String identifier = request.getIdentifier().getValue();
return new String[][] { { "Content-Disposition",
"attachment;filename=\"" + identifier.replace(':', '_') + ".eml\"" } };
}
@Override
public boolean canHandle(Operation operation) {
// this one can handle GetCoverage responses where store = false
if(!(operation.getParameters()[0] instanceof GetCoverageType))
return false;
GetCoverageType getCoverage = (GetCoverageType) operation.getParameters()[0];
return !getCoverage.getOutput().isStore();
}
@Override
public void write(Object value, OutputStream output, Operation operation) throws IOException,
ServiceException {
GridCoverage[] coverages = (GridCoverage[]) value;
// grab the delegate for coverage encoding
GetCoverageType request = (GetCoverageType) operation.getParameters()[0];
String outputFormat = request.getOutput().getFormat();
CoverageResponseDelegate delegate = CoverageResponseDelegateFactory
.encoderFor(outputFormat);
if (delegate == null)
throw new WcsException("Could not find encoder for output format " + outputFormat);
// grab the coverage info for Coverages document encoding
final GridCoverage2D coverage = (GridCoverage2D) coverages[0];
CoverageInfo coverageInfo = catalog.getCoverageByName(request.getIdentifier().getValue());
// use javamail classes to actually encode the document
try {
// coverages xml structure (always set the headers after the data
// handlers, setting
// the data handlers kills some of them)
BodyPart coveragesPart = new MimeBodyPart();
final CoveragesData coveragesData = new CoveragesData(coverageInfo, request);
coveragesPart.setDataHandler(new DataHandler(coveragesData, "geoserver/coverages"));
coveragesPart.setHeader("Content-ID", "<urn:ogc:wcs:1.1:coverages>");
coveragesPart.setHeader("Content-Type", "text/xml");
multipart.addBodyPart(coveragesPart);
// the actual coverage
BodyPart coveragePart = new MimeBodyPart();
delegate.prepare(outputFormat, coverage);
coveragePart.setDataHandler(new DataHandler(delegate, "geoserver/coverageDelegate"));
coveragePart.setHeader("Content-ID", "<theCoverage>");
coveragePart.setHeader("Content-Type", delegate.getContentType());
coveragePart.setHeader("Content-Transfer-Encoding", "base64");
multipart.addBodyPart(coveragePart);
// write out the multipart (we need to use mime message trying to
// encode directly with multipart or BodyPart does not set properly
// the encodings and binary files gets ruined
MimeMessage message = new GeoServerMimeMessage();
message.setContent(multipart);
message.writeTo(output);
output.flush();
} catch (MessagingException e) {
throw new WcsException("Error occurred while encoding the mime multipart response", e);
}
}
/**
* A special mime message that does not set any header other than the
* content type
*
* @author Andrea Aime - TOPP
*/
private static class GeoServerMimeMessage extends MimeMessage {
public GeoServerMimeMessage() {
super((Session) null);
}
@Override
protected void updateMessageID() throws MessagingException {
// it's just ugly to see ...
removeHeader("Message-ID");
}
}
}