/*
* 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 org.apache.catalina.valves;
import java.io.IOException;
import javax.servlet.ServletException;
import org.apache.catalina.valves.ValveBase;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
/**
* Valve that attempts to force MS WebDAV clients connecting on port 80 to use
* a WebDAV client that actually works. Other workarounds that might help
* include:
* <ul>
* <li>Specifing the port, even if it is port 80, when trying to connect.</li>
* <li>Canceling the first authentication dialog box and then trying to
* reconnect.</li>
* </ul>
* To use this valve add the following <code><Valve
* className="org.apache.catalina.valves.WebdavFixValve" /></code>
* to your <code>Engine</code>, <code>Host</code> or <code>Context</code> as
* required. Normally, this valve would be used at the <code>Context</code>
* level.
*
*
*/
public class WebdavFixValve
extends ValveBase {
/**
* Check for the broken MS WebDAV client and if detected issue a re-direct
* that hopefully will cause the non-broken client to be used.
*/
public void invoke(Request request, Response response)
throws IOException, ServletException {
String ua = request.getHeader("User-Agent");
if (ua != null && ua.contains("MiniRedir")) {
response.sendRedirect(buildRedirect(request));
} else {
getNext().invoke(request, response);
}
}
private String buildRedirect(Request request) {
StringBuffer location =
new StringBuffer(request.getRequestURL().length());
location.append(request.getScheme());
location.append("://");
location.append(request.getHost().getName());
location.append(':');
// If we include the port, even if it is 80, then MS clients will use
// a WebDAV client that works rather than the MiniRedir that has
// problems with BASIC authentication
location.append(request.getServerPort());
location.append(request.getRequestURI());
return location.toString();
}
}