/*
* Copyright (c) 2007-2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 com.sun.org.apache.xml.internal.security.utils.resolver.implementations;
import java.io.FileInputStream;
import java.net.URI;
import java.net.URISyntaxException;
import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput;
import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverContext;
import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException;
import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverSpi;
/**
* A simple ResourceResolver for requests into the local filesystem.
*/
public class ResolverLocalFilesystem extends ResourceResolverSpi {
private static final int FILE_URI_LENGTH = "file:/".length();
/** {@link org.apache.commons.logging} logging facility */
private static java.util.logging.Logger log =
java.util.logging.Logger.getLogger(ResolverLocalFilesystem.class.getName());
@Override
public boolean engineIsThreadSafe() {
return true;
}
/**
* @inheritDoc
*/
@Override
public XMLSignatureInput engineResolveURI(ResourceResolverContext context)
throws ResourceResolverException {
try {
// calculate new URI
URI uriNew = getNewURI(context.uriToResolve, context.baseUri);
String fileName =
ResolverLocalFilesystem.translateUriToFilename(uriNew.toString());
FileInputStream inputStream = new FileInputStream(fileName);
XMLSignatureInput result = new XMLSignatureInput(inputStream);
result.setSourceURI(uriNew.toString());
return result;
} catch (Exception e) {
throw new ResourceResolverException("generic.EmptyMessage", e, context.attr, context.baseUri);
}
}
/**
* Method translateUriToFilename
*
* @param uri
* @return the string of the filename
*/
private static String translateUriToFilename(String uri) {
String subStr = uri.substring(FILE_URI_LENGTH);
if (subStr.indexOf("%20") > -1) {
int offset = 0;
int index = 0;
StringBuilder temp = new StringBuilder(subStr.length());
do {
index = subStr.indexOf("%20",offset);
if (index == -1) {
temp.append(subStr.substring(offset));
} else {
temp.append(subStr.substring(offset, index));
temp.append(' ');
offset = index + 3;
}
} while(index != -1);
subStr = temp.toString();
}
if (subStr.charAt(1) == ':') {
// we're running M$ Windows, so this works fine
return subStr;
}
// we're running some UNIX, so we have to prepend a slash
return "/" + subStr;
}
/**
* @inheritDoc
*/
public boolean engineCanResolveURI(ResourceResolverContext context) {
if (context.uriToResolve == null) {
return false;
}
if (context.uriToResolve.equals("") || (context.uriToResolve.charAt(0)=='#') ||
context.uriToResolve.startsWith("http:")) {
return false;
}
try {
if (log.isLoggable(java.util.logging.Level.FINE)) {
log.log(java.util.logging.Level.FINE, "I was asked whether I can resolve " + context.uriToResolve);
}
if (context.uriToResolve.startsWith("file:") || context.baseUri.startsWith("file:")) {
if (log.isLoggable(java.util.logging.Level.FINE)) {
log.log(java.util.logging.Level.FINE, "I state that I can resolve " + context.uriToResolve);
}
return true;
}
} catch (Exception e) {
if (log.isLoggable(java.util.logging.Level.FINE)) {
log.log(java.util.logging.Level.FINE, e.getMessage(), e);
}
}
if (log.isLoggable(java.util.logging.Level.FINE)) {
log.log(java.util.logging.Level.FINE, "But I can't");
}
return false;
}
private static URI getNewURI(String uri, String baseURI) throws URISyntaxException {
URI newUri = null;
if (baseURI == null || "".equals(baseURI)) {
newUri = new URI(uri);
} else {
newUri = new URI(baseURI).resolve(uri);
}
// if the URI contains a fragment, ignore it
if (newUri.getFragment() != null) {
URI uriNewNoFrag =
new URI(newUri.getScheme(), newUri.getSchemeSpecificPart(), null);
return uriNewNoFrag;
}
return newUri;
}
}