src/java/org/eclipse/jetty/server/handler/ResourceHandler.java - platform/external/jetty - Git at Google

 //
 //  ========================================================================
 //  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
 //  ------------------------------------------------------------------------
 //  All rights reserved. This program and the accompanying materials
 //  are made available under the terms of the Eclipse Public License v1.0
 //  and Apache License v2.0 which accompanies this distribution.
 //
 //      The Eclipse Public License is available at
 //      http://www.eclipse.org/legal/epl-v10.html
 //
 //      The Apache License v2.0 is available at
 //      http://www.opensource.org/licenses/apache2.0.php
 //
 //  You may elect to redistribute this code under either of these licenses.
 //  ========================================================================
 //

 package org.eclipse.jetty.server.handler;

 import java.io.IOException;
 import java.io.OutputStream;
 import java.net.MalformedURLException;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import org.eclipse.jetty.http.HttpFields;
 import org.eclipse.jetty.http.HttpHeaders;
 import org.eclipse.jetty.http.HttpMethods;
 import org.eclipse.jetty.http.HttpStatus;
 import org.eclipse.jetty.http.MimeTypes;
 import org.eclipse.jetty.io.Buffer;
 import org.eclipse.jetty.io.ByteArrayBuffer;
 import org.eclipse.jetty.io.WriterOutputStream;
 import org.eclipse.jetty.server.AbstractHttpConnection;
 import org.eclipse.jetty.server.Dispatcher;
 import org.eclipse.jetty.server.Request;
 import org.eclipse.jetty.server.Response;
 import org.eclipse.jetty.server.handler.ContextHandler.Context;
 import org.eclipse.jetty.util.URIUtil;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 import org.eclipse.jetty.util.resource.FileResource;
 import org.eclipse.jetty.util.resource.Resource;


 /* ------------------------------------------------------------ */
 /** Resource Handler.
  *
  * This handle will serve static content and handle If-Modified-Since headers.
  * No caching is done.
  * Requests for resources that do not exist are let pass (Eg no 404's).
  *
  *
  * @org.apache.xbean.XBean
  */
 public class ResourceHandler extends HandlerWrapper
 {
     private static final Logger LOG = Log.getLogger(ResourceHandler.class);

     ContextHandler _context;
     Resource _baseResource;
     Resource _defaultStylesheet;
     Resource _stylesheet;
     String[] _welcomeFiles={"index.html"};
     MimeTypes _mimeTypes = new MimeTypes();
     ByteArrayBuffer _cacheControl;
     boolean _aliases;
     boolean _directory;
     boolean _etags;

     /* ------------------------------------------------------------ */
     public ResourceHandler()
     {

     }

     /* ------------------------------------------------------------ */
     public MimeTypes getMimeTypes()
     {
         return _mimeTypes;
     }

     /* ------------------------------------------------------------ */
     public void setMimeTypes(MimeTypes mimeTypes)
     {
         _mimeTypes = mimeTypes;
     }

     /* ------------------------------------------------------------ */
     /**
      * @return True if resource aliases are allowed.
      */
     public boolean isAliases()
     {
         return _aliases;
     }

     /* ------------------------------------------------------------ */
     /**
      * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed.
      * Allowing aliases can significantly increase security vulnerabilities.
      * If this handler is deployed inside a ContextHandler, then the
      * {@link ContextHandler#isAliases()} takes precedent.
      * @param aliases True if aliases are supported.
      */
     public void setAliases(boolean aliases)
     {
         _aliases = aliases;
     }

     /* ------------------------------------------------------------ */
     /** Get the directory option.
      * @return true if directories are listed.
      */
     public boolean isDirectoriesListed()
     {
         return _directory;
     }

     /* ------------------------------------------------------------ */
     /** Set the directory.
      * @param directory true if directories are listed.
      */
     public void setDirectoriesListed(boolean directory)
     {
         _directory = directory;
     }

     /* ------------------------------------------------------------ */
     /**
      * @return True if ETag processing is done
      */
     public boolean isEtags()
     {
         return _etags;
     }

     /* ------------------------------------------------------------ */
     /**
      * @param etags True if ETag processing is done
      */
     public void setEtags(boolean etags)
     {
         _etags = etags;
     }

     /* ------------------------------------------------------------ */
     @Override
     public void doStart()
     throws Exception
     {
         Context scontext = ContextHandler.getCurrentContext();
         _context = (scontext==null?null:scontext.getContextHandler());

         if (_context!=null)
             _aliases=_context.isAliases();

         if (!_aliases && !FileResource.getCheckAliases())
             throw new IllegalStateException("Alias checking disabled");

         super.doStart();
     }

     /* ------------------------------------------------------------ */
     /**
      * @return Returns the resourceBase.
      */
     public Resource getBaseResource()
     {
         if (_baseResource==null)
             return null;
         return _baseResource;
     }

     /* ------------------------------------------------------------ */
     /**
      * @return Returns the base resource as a string.
      */
     public String getResourceBase()
     {
         if (_baseResource==null)
             return null;
         return _baseResource.toString();
     }


     /* ------------------------------------------------------------ */
     /**
      * @param base The resourceBase to set.
      */
     public void setBaseResource(Resource base)
     {
         _baseResource=base;
     }

     /* ------------------------------------------------------------ */
     /**
      * @param resourceBase The base resource as a string.
      */
     public void setResourceBase(String resourceBase)
     {
         try
         {
             setBaseResource(Resource.newResource(resourceBase));
         }
         catch (Exception e)
         {
             LOG.warn(e.toString());
             LOG.debug(e);
             throw new IllegalArgumentException(resourceBase);
         }
     }

     /* ------------------------------------------------------------ */
     /**
      * @return Returns the stylesheet as a Resource.
      */
     public Resource getStylesheet()
     {
     	if(_stylesheet != null)
     	{
     	    return _stylesheet;
     	}
     	else
     	{
     	    if(_defaultStylesheet == null)
     	    {
     	        try
     	        {
     	            _defaultStylesheet =  Resource.newResource(this.getClass().getResource("/jetty-dir.css"));
     	        }
     	        catch(IOException e)
     	        {
     	            LOG.warn(e.toString());
     	            LOG.debug(e);
     	        }
     	    }
     	    return _defaultStylesheet;
     	}
     }

     /* ------------------------------------------------------------ */
     /**
      * @param stylesheet The location of the stylesheet to be used as a String.
      */
     public void setStylesheet(String stylesheet)
     {
         try
         {
             _stylesheet = Resource.newResource(stylesheet);
             if(!_stylesheet.exists())
             {
                 LOG.warn("unable to find custom stylesheet: " + stylesheet);
                 _stylesheet = null;
             }
         }
     	catch(Exception e)
     	{
     		LOG.warn(e.toString());
             LOG.debug(e);
             throw new IllegalArgumentException(stylesheet.toString());
     	}
     }

     /* ------------------------------------------------------------ */
     /**
      * @return the cacheControl header to set on all static content.
      */
     public String getCacheControl()
     {
         return _cacheControl.toString();
     }

     /* ------------------------------------------------------------ */
     /**
      * @param cacheControl the cacheControl header to set on all static content.
      */
     public void setCacheControl(String cacheControl)
     {
         _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl);
     }

     /* ------------------------------------------------------------ */
     /*
      */
     public Resource getResource(String path) throws MalformedURLException
     {
         if (path==null || !path.startsWith("/"))
             throw new MalformedURLException(path);

         Resource base = _baseResource;
         if (base==null)
         {
             if (_context==null)
                 return null;
             base=_context.getBaseResource();
             if (base==null)
                 return null;
         }

         try
         {
             path=URIUtil.canonicalPath(path);
             return base.addPath(path);
         }
         catch(Exception e)
         {
             LOG.ignore(e);
         }

         return null;
     }

     /* ------------------------------------------------------------ */
     protected Resource getResource(HttpServletRequest request) throws MalformedURLException
     {
         String servletPath;
         String pathInfo;
         Boolean included = request.getAttribute(Dispatcher.INCLUDE_REQUEST_URI) != null;
         if (included != null && included.booleanValue())
         {
             servletPath = (String)request.getAttribute(Dispatcher.INCLUDE_SERVLET_PATH);
             pathInfo = (String)request.getAttribute(Dispatcher.INCLUDE_PATH_INFO);

             if (servletPath == null && pathInfo == null)
             {
                 servletPath = request.getServletPath();
                 pathInfo = request.getPathInfo();
             }
         }
         else
         {
             servletPath = request.getServletPath();
             pathInfo = request.getPathInfo();
         }

         String pathInContext=URIUtil.addPaths(servletPath,pathInfo);
         return getResource(pathInContext);
     }


     /* ------------------------------------------------------------ */
     public String[] getWelcomeFiles()
     {
         return _welcomeFiles;
     }

     /* ------------------------------------------------------------ */
     public void setWelcomeFiles(String[] welcomeFiles)
     {
         _welcomeFiles=welcomeFiles;
     }

     /* ------------------------------------------------------------ */
     protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException
     {
         for (int i=0;i<_welcomeFiles.length;i++)
         {
             Resource welcome=directory.addPath(_welcomeFiles[i]);
             if (welcome.exists() && !welcome.isDirectory())
                 return welcome;
         }

         return null;
     }

     /* ------------------------------------------------------------ */
     /*
      * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int)
      */
     public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
     {
         if (baseRequest.isHandled())
             return;

         boolean skipContentBody = false;

         if(!HttpMethods.GET.equals(request.getMethod()))
         {
             if(!HttpMethods.HEAD.equals(request.getMethod()))
             {
                 //try another handler
                 super.handle(target, baseRequest, request, response);
                 return;
             }
             skipContentBody = true;
         }

         Resource resource = getResource(request);

         if (resource==null || !resource.exists())
         {
             if (target.endsWith("/jetty-dir.css"))
             {
                 resource = getStylesheet();
                 if (resource==null)
                     return;
                 response.setContentType("text/css");
             }
             else
             {
                 //no resource - try other handlers
                 super.handle(target, baseRequest, request, response);
                 return;
             }
         }

         if (!_aliases && resource.getAlias()!=null)
         {
             LOG.info(resource+" aliased to "+resource.getAlias());
             return;
         }

         // We are going to serve something
         baseRequest.setHandled(true);

         if (resource.isDirectory())
         {
             if (!request.getPathInfo().endsWith(URIUtil.SLASH))
             {
                 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH)));
                 return;
             }

             Resource welcome=getWelcome(resource);
             if (welcome!=null && welcome.exists())
                 resource=welcome;
             else
             {
                 doDirectory(request,response,resource);
                 baseRequest.setHandled(true);
                 return;
             }
         }

         // set some headers
         long last_modified=resource.lastModified();
         String etag=null;
         if (_etags)
         {
             // simple handling of only a single etag
             String ifnm = request.getHeader(HttpHeaders.IF_NONE_MATCH);
             etag=resource.getWeakETag();
             if (ifnm!=null && resource!=null && ifnm.equals(etag))
             {
                 response.setStatus(HttpStatus.NOT_MODIFIED_304);
                 baseRequest.getResponse().getHttpFields().put(HttpHeaders.ETAG_BUFFER,etag);
                 return;
             }
         }


         if (last_modified>0)
         {
             long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE);
             if (if_modified>0 && last_modified/1000<=if_modified/1000)
             {
                 response.setStatus(HttpStatus.NOT_MODIFIED_304);
                 return;
             }
         }

         Buffer mime=_mimeTypes.getMimeByExtension(resource.toString());
         if (mime==null)
             mime=_mimeTypes.getMimeByExtension(request.getPathInfo());

         // set the headers
         doResponseHeaders(response,resource,mime!=null?mime.toString():null);
         response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified);
         if (_etags)
             baseRequest.getResponse().getHttpFields().put(HttpHeaders.ETAG_BUFFER,etag);

         if(skipContentBody)
             return;
         // Send the content
         OutputStream out =null;
         try {out = response.getOutputStream();}
         catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());}

         // See if a short direct method can be used?
         if (out instanceof AbstractHttpConnection.Output)
         {
             // TODO file mapped buffers
             ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream());
         }
         else
         {
             // Write content normally
             resource.writeTo(out,0,resource.length());
         }
     }

     /* ------------------------------------------------------------ */
     protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource)
         throws IOException
     {
         if (_directory)
         {
             String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0);
             response.setContentType("text/html; charset=UTF-8");
             response.getWriter().println(listing);
         }
         else
             response.sendError(HttpStatus.FORBIDDEN_403);
     }

     /* ------------------------------------------------------------ */
     /** Set the response headers.
      * This method is called to set the response headers such as content type and content length.
      * May be extended to add additional headers.
      * @param response
      * @param resource
      * @param mimeType
      */
     protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType)
     {
         if (mimeType!=null)
             response.setContentType(mimeType);

         long length=resource.length();

         if (response instanceof Response)
         {
             HttpFields fields = ((Response)response).getHttpFields();

             if (length>0)
                 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length);

             if (_cacheControl!=null)
                 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl);
         }
         else
         {
             if (length>0)
                 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length));

             if (_cacheControl!=null)
                 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString());
         }

     }
 }
	//
	// ========================================================================
	// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
	// ------------------------------------------------------------------------
	// All rights reserved. This program and the accompanying materials
	// are made available under the terms of the Eclipse Public License v1.0
	// and Apache License v2.0 which accompanies this distribution.
	//
	// The Eclipse Public License is available at
	// http://www.eclipse.org/legal/epl-v10.html
	//
	// The Apache License v2.0 is available at
	// http://www.opensource.org/licenses/apache2.0.php
	//
	// You may elect to redistribute this code under either of these licenses.
	// ========================================================================
	//

	package org.eclipse.jetty.server.handler;

	import java.io.IOException;
	import java.io.OutputStream;
	import java.net.MalformedURLException;

	import javax.servlet.ServletException;
	import javax.servlet.http.HttpServletRequest;
	import javax.servlet.http.HttpServletResponse;

	import org.eclipse.jetty.http.HttpFields;
	import org.eclipse.jetty.http.HttpHeaders;
	import org.eclipse.jetty.http.HttpMethods;
	import org.eclipse.jetty.http.HttpStatus;
	import org.eclipse.jetty.http.MimeTypes;
	import org.eclipse.jetty.io.Buffer;
	import org.eclipse.jetty.io.ByteArrayBuffer;
	import org.eclipse.jetty.io.WriterOutputStream;
	import org.eclipse.jetty.server.AbstractHttpConnection;
	import org.eclipse.jetty.server.Dispatcher;
	import org.eclipse.jetty.server.Request;
	import org.eclipse.jetty.server.Response;
	import org.eclipse.jetty.server.handler.ContextHandler.Context;
	import org.eclipse.jetty.util.URIUtil;
	import org.eclipse.jetty.util.log.Log;
	import org.eclipse.jetty.util.log.Logger;
	import org.eclipse.jetty.util.resource.FileResource;
	import org.eclipse.jetty.util.resource.Resource;


	/* ------------------------------------------------------------ */
	/** Resource Handler.
	*
	* This handle will serve static content and handle If-Modified-Since headers.
	* No caching is done.
	* Requests for resources that do not exist are let pass (Eg no 404's).
	*
	*
	* @org.apache.xbean.XBean
	*/
	public class ResourceHandler extends HandlerWrapper
	{
	private static final Logger LOG = Log.getLogger(ResourceHandler.class);

	ContextHandler _context;
	Resource _baseResource;
	Resource _defaultStylesheet;
	Resource _stylesheet;
	String[] _welcomeFiles={"index.html"};
	MimeTypes _mimeTypes = new MimeTypes();
	ByteArrayBuffer _cacheControl;
	boolean _aliases;
	boolean _directory;
	boolean _etags;

	/* ------------------------------------------------------------ */
	public ResourceHandler()
	{

	}

	/* ------------------------------------------------------------ */
	public MimeTypes getMimeTypes()
	{
	return _mimeTypes;
	}

	/* ------------------------------------------------------------ */
	public void setMimeTypes(MimeTypes mimeTypes)
	{
	_mimeTypes = mimeTypes;
	}

	/* ------------------------------------------------------------ */
	/**
	* @return True if resource aliases are allowed.
	*/
	public boolean isAliases()
	{
	return _aliases;
	}

	/* ------------------------------------------------------------ */
	/**
	* Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed.
	* Allowing aliases can significantly increase security vulnerabilities.
	* If this handler is deployed inside a ContextHandler, then the
	* {@link ContextHandler#isAliases()} takes precedent.
	* @param aliases True if aliases are supported.
	*/
	public void setAliases(boolean aliases)
	{
	_aliases = aliases;
	}

	/* ------------------------------------------------------------ */
	/** Get the directory option.
	* @return true if directories are listed.
	*/
	public boolean isDirectoriesListed()
	{
	return _directory;
	}

	/* ------------------------------------------------------------ */
	/** Set the directory.
	* @param directory true if directories are listed.
	*/
	public void setDirectoriesListed(boolean directory)
	{
	_directory = directory;
	}

	/* ------------------------------------------------------------ */
	/**
	* @return True if ETag processing is done
	*/
	public boolean isEtags()
	{
	return _etags;
	}

	/* ------------------------------------------------------------ */
	/**
	* @param etags True if ETag processing is done
	*/
	public void setEtags(boolean etags)
	{
	_etags = etags;
	}

	/* ------------------------------------------------------------ */
	@Override
	public void doStart()
	throws Exception
	{
	Context scontext = ContextHandler.getCurrentContext();
	_context = (scontext==null?null:scontext.getContextHandler());

	if (_context!=null)
	_aliases=_context.isAliases();

	if (!_aliases && !FileResource.getCheckAliases())
	throw new IllegalStateException("Alias checking disabled");

	super.doStart();
	}

	/* ------------------------------------------------------------ */
	/**
	* @return Returns the resourceBase.
	*/
	public Resource getBaseResource()
	{
	if (_baseResource==null)
	return null;
	return _baseResource;
	}

	/* ------------------------------------------------------------ */
	/**
	* @return Returns the base resource as a string.
	*/
	public String getResourceBase()
	{
	if (_baseResource==null)
	return null;
	return _baseResource.toString();
	}


	/* ------------------------------------------------------------ */
	/**
	* @param base The resourceBase to set.
	*/
	public void setBaseResource(Resource base)
	{
	_baseResource=base;
	}

	/* ------------------------------------------------------------ */
	/**
	* @param resourceBase The base resource as a string.
	*/
	public void setResourceBase(String resourceBase)
	{
	try
	{
	setBaseResource(Resource.newResource(resourceBase));
	}
	catch (Exception e)
	{
	LOG.warn(e.toString());
	LOG.debug(e);
	throw new IllegalArgumentException(resourceBase);
	}
	}

	/* ------------------------------------------------------------ */
	/**
	* @return Returns the stylesheet as a Resource.
	*/
	public Resource getStylesheet()
	{
	if(_stylesheet != null)
	{
	return _stylesheet;
	}
	else
	{
	if(_defaultStylesheet == null)
	{
	try
	{
	_defaultStylesheet = Resource.newResource(this.getClass().getResource("/jetty-dir.css"));
	}
	catch(IOException e)
	{
	LOG.warn(e.toString());
	LOG.debug(e);
	}
	}
	return _defaultStylesheet;
	}
	}

	/* ------------------------------------------------------------ */
	/**
	* @param stylesheet The location of the stylesheet to be used as a String.
	*/
	public void setStylesheet(String stylesheet)
	{
	try
	{
	_stylesheet = Resource.newResource(stylesheet);
	if(!_stylesheet.exists())
	{
	LOG.warn("unable to find custom stylesheet: " + stylesheet);
	_stylesheet = null;
	}
	}
	catch(Exception e)
	{
	LOG.warn(e.toString());
	LOG.debug(e);
	throw new IllegalArgumentException(stylesheet.toString());
	}
	}

	/* ------------------------------------------------------------ */
	/**
	* @return the cacheControl header to set on all static content.
	*/
	public String getCacheControl()
	{
	return _cacheControl.toString();
	}

	/* ------------------------------------------------------------ */
	/**
	* @param cacheControl the cacheControl header to set on all static content.
	*/
	public void setCacheControl(String cacheControl)
	{
	_cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl);
	}

	/* ------------------------------------------------------------ */
	/*
	*/
	public Resource getResource(String path) throws MalformedURLException
	{
	if (path==null \|\| !path.startsWith("/"))
	throw new MalformedURLException(path);

	Resource base = _baseResource;
	if (base==null)
	{
	if (_context==null)
	return null;
	base=_context.getBaseResource();
	if (base==null)
	return null;
	}

	try
	{
	path=URIUtil.canonicalPath(path);
	return base.addPath(path);
	}
	catch(Exception e)
	{
	LOG.ignore(e);
	}

	return null;
	}

	/* ------------------------------------------------------------ */
	protected Resource getResource(HttpServletRequest request) throws MalformedURLException
	{
	String servletPath;
	String pathInfo;
	Boolean included = request.getAttribute(Dispatcher.INCLUDE_REQUEST_URI) != null;
	if (included != null && included.booleanValue())
	{
	servletPath = (String)request.getAttribute(Dispatcher.INCLUDE_SERVLET_PATH);
	pathInfo = (String)request.getAttribute(Dispatcher.INCLUDE_PATH_INFO);

	if (servletPath == null && pathInfo == null)
	{
	servletPath = request.getServletPath();
	pathInfo = request.getPathInfo();
	}
	}
	else
	{
	servletPath = request.getServletPath();
	pathInfo = request.getPathInfo();
	}

	String pathInContext=URIUtil.addPaths(servletPath,pathInfo);
	return getResource(pathInContext);
	}


	/* ------------------------------------------------------------ */
	public String[] getWelcomeFiles()
	{
	return _welcomeFiles;
	}

	/* ------------------------------------------------------------ */
	public void setWelcomeFiles(String[] welcomeFiles)
	{
	_welcomeFiles=welcomeFiles;
	}

	/* ------------------------------------------------------------ */
	protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException
	{
	for (int i=0;i<_welcomeFiles.length;i++)
	{
	Resource welcome=directory.addPath(_welcomeFiles[i]);
	if (welcome.exists() && !welcome.isDirectory())
	return welcome;
	}

	return null;
	}

	/* ------------------------------------------------------------ */
	/*
	* @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int)
	*/
	public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
	{
	if (baseRequest.isHandled())
	return;

	boolean skipContentBody = false;

	if(!HttpMethods.GET.equals(request.getMethod()))
	{
	if(!HttpMethods.HEAD.equals(request.getMethod()))
	{
	//try another handler
	super.handle(target, baseRequest, request, response);
	return;
	}
	skipContentBody = true;
	}

	Resource resource = getResource(request);

	if (resource==null \|\| !resource.exists())
	{
	if (target.endsWith("/jetty-dir.css"))
	{
	resource = getStylesheet();
	if (resource==null)
	return;
	response.setContentType("text/css");
	}
	else
	{
	//no resource - try other handlers
	super.handle(target, baseRequest, request, response);
	return;
	}
	}

	if (!_aliases && resource.getAlias()!=null)
	{
	LOG.info(resource+" aliased to "+resource.getAlias());
	return;
	}

	// We are going to serve something
	baseRequest.setHandled(true);

	if (resource.isDirectory())
	{
	if (!request.getPathInfo().endsWith(URIUtil.SLASH))
	{
	response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH)));
	return;
	}

	Resource welcome=getWelcome(resource);
	if (welcome!=null && welcome.exists())
	resource=welcome;
	else
	{
	doDirectory(request,response,resource);
	baseRequest.setHandled(true);
	return;
	}
	}

	// set some headers
	long last_modified=resource.lastModified();
	String etag=null;
	if (_etags)
	{
	// simple handling of only a single etag
	String ifnm = request.getHeader(HttpHeaders.IF_NONE_MATCH);
	etag=resource.getWeakETag();
	if (ifnm!=null && resource!=null && ifnm.equals(etag))
	{
	response.setStatus(HttpStatus.NOT_MODIFIED_304);
	baseRequest.getResponse().getHttpFields().put(HttpHeaders.ETAG_BUFFER,etag);
	return;
	}
	}


	if (last_modified>0)
	{
	long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE);
	if (if_modified>0 && last_modified/1000<=if_modified/1000)
	{
	response.setStatus(HttpStatus.NOT_MODIFIED_304);
	return;
	}
	}

	Buffer mime=_mimeTypes.getMimeByExtension(resource.toString());
	if (mime==null)
	mime=_mimeTypes.getMimeByExtension(request.getPathInfo());

	// set the headers
	doResponseHeaders(response,resource,mime!=null?mime.toString():null);
	response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified);
	if (_etags)
	baseRequest.getResponse().getHttpFields().put(HttpHeaders.ETAG_BUFFER,etag);

	if(skipContentBody)
	return;
	// Send the content
	OutputStream out =null;
	try {out = response.getOutputStream();}
	catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());}

	// See if a short direct method can be used?
	if (out instanceof AbstractHttpConnection.Output)
	{
	// TODO file mapped buffers
	((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream());
	}
	else
	{
	// Write content normally
	resource.writeTo(out,0,resource.length());
	}
	}

	/* ------------------------------------------------------------ */
	protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource)
	throws IOException
	{
	if (_directory)
	{
	String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0);
	response.setContentType("text/html; charset=UTF-8");
	response.getWriter().println(listing);
	}
	else
	response.sendError(HttpStatus.FORBIDDEN_403);
	}

	/* ------------------------------------------------------------ */
	/** Set the response headers.
	* This method is called to set the response headers such as content type and content length.
	* May be extended to add additional headers.
	* @param response
	* @param resource
	* @param mimeType
	*/
	protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType)
	{
	if (mimeType!=null)
	response.setContentType(mimeType);

	long length=resource.length();

	if (response instanceof Response)
	{
	HttpFields fields = ((Response)response).getHttpFields();

	if (length>0)
	fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length);

	if (_cacheControl!=null)
	fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl);
	}
	else
	{
	if (length>0)
	response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length));

	if (_cacheControl!=null)
	response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString());
	}

	}
	}