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package org.apache.catalina.valves;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 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.
*
* @version $Revision: 420067 $, $Date: 2006-07-08 09:16:58 +0200 (sub, 08 srp 2006) $
*/
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 int invoke(Request request, Response response)
throws IOException, ServletException {
HttpServletRequest hreq = (HttpServletRequest)request.getRequest();
HttpServletResponse hres = (HttpServletResponse)response.getResponse();
String ua = hreq.getHeader("User-Agent");
if (ua != null && ua.contains("MiniRedir")) {
hres.sendRedirect(buildRedirect(hreq));
return END_PIPELINE;
} else {
return INVOKE_NEXT;
}
}
private String buildRedirect(HttpServletRequest request) {
StringBuilder location =
new StringBuilder(request.getRequestURL().length());
location.append(request.getScheme());
location.append("://");
location.append(request.getServerName());
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();
}
}