package org.jboss.seam.web;
import static org.jboss.seam.ScopeType.APPLICATION;
import static org.jboss.seam.annotations.Install.BUILT_IN;
import static org.jboss.seam.core.Manager.REDIRECT_FROM_MANAGER;
import java.io.IOException;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import org.jboss.seam.annotations.Install;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.intercept.BypassInterceptors;
import org.jboss.seam.annotations.web.Filter;
import org.jboss.seam.contexts.Contexts;
import org.jboss.seam.faces.FacesManager;
import org.jboss.seam.navigation.Pages;
/**
* Propagates the conversation context and page parameters across any
* browser redirect initiated from a JSF navigation rule defined in
* faces-config.xml. Note that this is no longer needed if all
* navigation rules are defined in pages.xml.
*
* @author Gavin King
*/
@Scope(APPLICATION)
@Name("org.jboss.seam.web.redirectFilter")
@Install(precedence = BUILT_IN, classDependencies="javax.faces.context.FacesContext")
@BypassInterceptors
@Filter(within="org.jboss.seam.web.ajax4jsfFilter")
public class RedirectFilter extends AbstractFilter
{
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException
{
chain.doFilter( request, wrapResponse( (HttpServletResponse) response ) );
}
private static ServletResponse wrapResponse(HttpServletResponse response)
{
return new HttpServletResponseWrapper(response)
{
@Override
public void sendRedirect(String url) throws IOException
{
if ( Contexts.isEventContextActive() && !Contexts.getEventContext().isSet(REDIRECT_FROM_MANAGER) )
{
if ( !url.startsWith("http:") && !url.startsWith("https:") ) //yew!
{
String viewId = getViewId(url);
if (viewId!=null)
{
url = Pages.instance().encodePageParameters( FacesContext.getCurrentInstance(), url, viewId );
}
if ( Contexts.isConversationContextActive() )
{
url = FacesManager.instance().appendConversationIdFromRedirectFilter(url, viewId);
}
}
}
super.sendRedirect(url);
}
};
}
public static String getViewId(String url)
{
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext==null)
{
return null;
}
else
{
ExternalContext externalContext = facesContext.getExternalContext();
String pathInfo = externalContext.getRequestPathInfo();
String servletPath = externalContext.getRequestServletPath();
String contextPath = externalContext.getRequestContextPath();
return getViewId(url, pathInfo, servletPath, contextPath);
}
}
protected static String getViewId(String url, String pathInfo, String servletPath, String contextPath)
{
if (pathInfo!=null)
{
//for /seam/* style servlet mappings
return url.substring( contextPath.length() + servletPath.length(), getParamLoc(url) );
}
else if ( url.startsWith(contextPath) )
{
//for *.seam style servlet mappings
String extension = servletPath.substring( servletPath.lastIndexOf('.') );
if ( url.endsWith(extension) || url.contains(extension + '?') )
{
String suffix = Pages.getSuffix();
return url.substring( contextPath.length(), getParamLoc(url) - extension.length() ) + suffix;
}
else
{
return null;
}
}
else
{
return null;
}
}
private static int getParamLoc(String url)
{
int loc = url.indexOf('?');
if (loc<0) loc = url.length();
return loc;
}
}