/*
* Copyright (c) 2003-2011, Simon Brown
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* - Neither the name of Pebble nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package net.sourceforge.pebble.web.filter;
import net.sourceforge.pebble.Constants;
import net.sourceforge.pebble.domain.AbstractBlog;
import net.sourceforge.pebble.domain.Blog;
import net.sourceforge.pebble.domain.BlogManager;
import net.sourceforge.pebble.domain.MultiBlog;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.net.URLDecoder;
/**
* A filter that transforms an incoming URI into an action URI.
*
* @author Simon Brown
*/
public class TransformingFilter implements Filter {
/** the config of this filter */
private FilterConfig filterConfig;
/** the log used by this class */
private static Log log = LogFactory.getLog(TransformingFilter.class);
/**
* Initialises this instance.
*
* @param config a FilterConfig instance
*/
public void init(FilterConfig config) {
this.filterConfig = config;
}
/**
* Called when this filter is taken out of service.
*/
public void destroy() {
}
/**
* Contains the processing associated with this filter.
*/
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws ServletException, IOException {
HttpServletRequest httpRequest = (HttpServletRequest)request;
AbstractBlog blog = (AbstractBlog)request.getAttribute(Constants.BLOG_KEY);
// get URI and strip off the context (e.g. /blog)
String uri = httpRequest.getRequestURI();
uri = uri.substring(httpRequest.getContextPath().length(), uri.length());
// now we're left with a URI
if (BlogManager.getInstance().isMultiBlog()) {
if (uri.length() == 0) {
uri = "/";
}
int index = uri.indexOf("/", 1);
if (index == -1) {
index = uri.length();
}
String blogName = uri.substring(1, index);
blogName = URLDecoder.decode(blogName, "UTF-8");
if (BlogManager.getInstance().hasBlog(blogName)) {
uri = uri.substring(index, uri.length());
}
}
if (uri == null || uri.trim().equals("")) {
uri = "/";
}
log.trace("uri : " + uri);
// Only add the query string to external URI, otherwise each parameter in the query string will end up being put in
// twice to the parameter map.
String externalUri = uri;
if (httpRequest.getQueryString() != null) {
externalUri += "?" + httpRequest.getQueryString();
}
httpRequest.setAttribute(Constants.EXTERNAL_URI, externalUri);
UriTransformer transformer = new UriTransformer();
String internalUri;
if (blog instanceof Blog) {
internalUri = transformer.getUri(uri, (Blog)blog);
} else {
internalUri = transformer.getUri(uri, (MultiBlog)blog);
}
request.setAttribute(Constants.INTERNAL_URI, internalUri);
log.trace(uri + " -> " + internalUri);
chain.doFilter(request, response);
}
}