/*
* Copyright 2010 The Apache Software Foundation.
*
* 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 javax.xml.crypto.test.dsig;
import java.io.File;
import java.io.FileInputStream;
import javax.xml.crypto.Data;
import javax.xml.crypto.OctetStreamData;
import javax.xml.crypto.URIDereferencer;
import javax.xml.crypto.URIReference;
import javax.xml.crypto.URIReferenceException;
import javax.xml.crypto.XMLCryptoContext;
import javax.xml.crypto.dsig.XMLSignatureFactory;
/**
* This URIDereferencer implementation retrieves http references used in
* test signatures from local disk in order to avoid network requests.
* Currently only one file is cached but more can be added.
*/
public class LocalHttpCacheURIDereferencer implements URIDereferencer {
private final URIDereferencer ud;
private final File f;
private final static String FS = System.getProperty("file.separator");
private final static String BASEDIR = System.getProperty("basedir");
public LocalHttpCacheURIDereferencer() {
ud = XMLSignatureFactory.getInstance().getURIDereferencer();
String base = BASEDIR == null ? "./": BASEDIR;
File dir = new File(base + FS + "data" + FS + "javax" +
FS + "xml" + FS + "crypto" + FS + "dsig");
f = new File(dir, "xml-stylesheet");
}
public Data dereference(URIReference uriReference, XMLCryptoContext context)
throws URIReferenceException {
String uri = uriReference.getURI();
if (uri.equals("http://www.w3.org/TR/xml-stylesheet")) {
try {
FileInputStream fis = new FileInputStream(f);
return new OctetStreamData(
fis, uriReference.getURI(), uriReference.getType());
} catch (Exception e) { throw new URIReferenceException(e); }
}
// fallback on builtin deref
return ud.dereference(uriReference, context);
}
}