/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-09 Wolfgang M. Meier
* wolfgang@exist-db.org
* http://exist.sourceforge.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xquery.functions.request;
import org.apache.log4j.Logger;
import java.io.File;
import java.util.List;
import org.exist.dom.QName;
import org.exist.http.servlets.RequestWrapper;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.Variable;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.Base64BinaryValueType;
import org.exist.xquery.value.BinaryValueFromFile;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.JavaObjectValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
import org.exist.xquery.value.ValueSequence;
/**
* @author wolf
*/
public class GetUploadedFile extends BasicFunction {
protected static final Logger logger = Logger.getLogger(GetUploadedFile.class);
public final static FunctionSignature signatures[] = {
new FunctionSignature(
new QName("get-uploaded-file-data", RequestModule.NAMESPACE_URI, RequestModule.PREFIX),
"Retrieve the base64 encoded data where the file part of a multi-part request has been stored. "
+ "Returns the empty sequence if the request is not a multi-part request or the parameter name "
+ "does not point to a file part.",
new SequenceType[]{
new FunctionParameterSequenceType("upload-param-name", Type.STRING, Cardinality.EXACTLY_ONE, "The parameter name")
},
new FunctionReturnSequenceType(Type.BASE64_BINARY, Cardinality.ZERO_OR_MORE, "the base64 encoded data from the uploaded file"))
};
public GetUploadedFile(XQueryContext context, FunctionSignature signature) {
super(context, signature);
}
/* (non-Javadoc)
* @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
*/
@Override
public Sequence eval(Sequence[] args, Sequence contextSequence)
throws XPathException {
final RequestModule myModule =
(RequestModule) context.getModule(RequestModule.NAMESPACE_URI);
// request object is read from global variable $request
final Variable var = myModule.resolveVariable(RequestModule.REQUEST_VAR);
if (var == null || var.getValue() == null) {
throw new XPathException(this, "No request object found in the current XQuery context.");
}
if (var.getValue().getItemType() != Type.JAVA_OBJECT) {
throw new XPathException(this, "Variable $request is not bound to an Java object.");
}
// get parameters
final String uploadParamName = args[0].getStringValue();
final JavaObjectValue value = (JavaObjectValue) var.getValue().itemAt(0);
if (value.getObject() instanceof RequestWrapper) {
final RequestWrapper request = (RequestWrapper) value.getObject();
final List<File> files = request.getFileUploadParam(uploadParamName);
if (files == null) {
logger.debug("File param not found: " + uploadParamName);
return Sequence.EMPTY_SEQUENCE;
}
/* InputStream is = null;
try {
is = new BufferedInputStream(new FileInputStream(file));
byte buf[] = new byte[1024];
int read = -1;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while ((read = is.read(buf)) != -1) {
baos.write(buf, 0, read);
}
return new Base64Binary(baos.toByteArray());
} catch (FileNotFoundException fnfe) {
throw new XPathException(this, fnfe.getMessage(), fnfe);
} catch (IOException ioe) {
throw new XPathException(this, ioe.getMessage(), ioe);
} finally {
if (is != null) {
try {
is.close();
} catch (IOException ioe) {
logger.warn(ioe.getMessage(), ioe);
}
}
} */
final ValueSequence result = new ValueSequence();
for (final File file : files) {
result.add(BinaryValueFromFile.getInstance(context, new Base64BinaryValueType(), file));
}
return result;
} else {
throw new XPathException(this, "Variable $request is not bound to a Request object.");
}
}
}