Merge remote-tracking branch 'origin/jetty-7' into jetty-8

Conflicts:
	jetty-servlet/src/test/java/org/eclipse/jetty/servlet/DefaultServletTest.java

jetty-http/src/main/java/org/eclipse/jetty/http/HttpContent.java

@@ -38,6 +38,7 @@ public interface HttpContent
     Buffer getLastModified();
     Buffer getIndirectBuffer();
     Buffer getDirectBuffer();
+    Buffer getETag();
     Resource getResource();
     long getContentLength();
     InputStream getInputStream() throws IOException;
@@ -53,19 +54,33 @@ public interface HttpContent
         final Resource _resource;
         final Buffer _mimeType;
         final int _maxBuffer;
+        final Buffer _etag;
 
+        /* ------------------------------------------------------------ */
         public ResourceAsHttpContent(final Resource resource, final Buffer mimeType)
         {
-            _resource=resource;
+            this(resource,mimeType,-1,false);
-            _mimeType=mimeType;
-            _maxBuffer=-1;
         }
 
+        /* ------------------------------------------------------------ */
         public ResourceAsHttpContent(final Resource resource, final Buffer mimeType, int maxBuffer)
+        {
+            this(resource,mimeType,maxBuffer,false);
+        }
+
+        /* ------------------------------------------------------------ */
+        public ResourceAsHttpContent(final Resource resource, final Buffer mimeType, boolean etag)
+        {
+            this(resource,mimeType,-1,etag);
+        }
+
+        /* ------------------------------------------------------------ */
+        public ResourceAsHttpContent(final Resource resource, final Buffer mimeType, int maxBuffer, boolean etag)
         {
             _resource=resource;
             _mimeType=mimeType;
             _maxBuffer=maxBuffer;
+            _etag=etag?new ByteArrayBuffer(resource.getWeakETag()):null;
         }
 
         /* ------------------------------------------------------------ */
@@ -86,6 +101,12 @@ public interface HttpContent
             return null;
         }
         
+        /* ------------------------------------------------------------ */
+        public Buffer getETag()
+        {
+            return _etag;
+        }
+
         /* ------------------------------------------------------------ */
         public Buffer getIndirectBuffer()
         {

jetty-http/src/main/java/org/eclipse/jetty/http/gzip/AbstractCompressedStream.java

@@ -40,43 +40,26 @@ import org.eclipse.jetty.util.ByteArrayOutputStream2;
 public abstract class AbstractCompressedStream extends ServletOutputStream 
 {
     private final String _encoding;
-    protected HttpServletRequest _request;
+    protected final CompressedResponseWrapper _wrapper;
-    protected HttpServletResponse _response;
+    protected final HttpServletResponse _response;
     protected OutputStream _out;
     protected ByteArrayOutputStream2 _bOut;
     protected DeflaterOutputStream _compressedOutputStream;
     protected boolean _closed;
-    protected int _bufferSize;
-    protected int _minCompressSize;
-    protected long _contentLength;
     protected boolean _doNotCompress;
 
     /**
      * Instantiates a new compressed stream.
      * 
-     * @param request
-     *            the request
-     * @param response
-     *            the response
-     * @param contentLength
-     *            the content length
-     * @param bufferSize
-     *            the buffer size
-     * @param minCompressSize
-     *            the min compress size
-     * @throws IOException
-     *             Signals that an I/O exception has occurred.
      */
-    public AbstractCompressedStream(String encoding,HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize, int minCompressSize)
+    public AbstractCompressedStream(String encoding,HttpServletRequest request, CompressedResponseWrapper wrapper)
             throws IOException
     {
         _encoding=encoding;
-        _request = request;
+        _wrapper = wrapper;
-        _response = response;
+        _response = (HttpServletResponse)wrapper.getResponse();
-        _contentLength = contentLength;
+        
-        _bufferSize = bufferSize;
+        if (_wrapper.getMinCompressSize()==0)
-        _minCompressSize = minCompressSize;
-        if (minCompressSize == 0)
             doCompress();
     }
 
@@ -96,21 +79,19 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
         _doNotCompress = false;
     }
 
-    /**
+    /* ------------------------------------------------------------ */
-     * Sets the content length.
+    public void setContentLength()
-     * 
-     * @param length
-     *            the new content length
-     */
-    public void setContentLength(long length)
     {
-        _contentLength = length;
+        if (_doNotCompress)
-        if (_doNotCompress && length >= 0)
         {
-            if (_contentLength < Integer.MAX_VALUE)
+            long length=_wrapper.getContentLength();
-                _response.setContentLength((int)_contentLength);
+            if (length>=0)
-            else
+            {
-                _response.setHeader("Content-Length",Long.toString(_contentLength));
+                if (length < Integer.MAX_VALUE)
+                    _response.setContentLength((int)length);
+                else
+                    _response.setHeader("Content-Length",Long.toString(length));
+            }
         }
     }
 
@@ -123,7 +104,8 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
     {
         if (_out == null || _bOut != null)
         {
-            if (_contentLength > 0 && _contentLength < _minCompressSize)
+            long length=_wrapper.getContentLength();
+            if (length > 0 && length < _wrapper.getMinCompressSize())
                 doNotCompress();
             else
                 doCompress();
@@ -142,15 +124,19 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
         if (_closed)
             return;
 
-        if (_request.getAttribute("javax.servlet.include.request_uri") != null)
+        if (_wrapper.getRequest().getAttribute("javax.servlet.include.request_uri") != null)
             flush();
         else
         {
             if (_bOut != null)
             {
-                if (_contentLength < 0)
+                long length=_wrapper.getContentLength();
-                    _contentLength = _bOut.getCount();
+                if (length < 0)
-                if (_contentLength < _minCompressSize)
+                {
+                    length = _bOut.getCount();
+                    _wrapper.setContentLength(length);
+                }
+                if (length < _wrapper.getMinCompressSize())
                     doNotCompress();
                 else
                     doCompress();
@@ -180,7 +166,8 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
         {
             if (_out == null || _bOut != null)
             {
-                if (_contentLength > 0 && _contentLength < _minCompressSize)
+                long length=_wrapper.getContentLength();
+                if (length > 0 && length < _wrapper.getMinCompressSize())
                     doNotCompress();
                 else
                     doCompress();
@@ -249,6 +236,10 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
                     _out.write(_bOut.getBuf(),0,_bOut.getCount());
                     _bOut=null;
                 }
+                
+                String etag=_wrapper.getETag();
+                if (etag!=null)
+                    setHeader("ETag",etag.substring(0,etag.length()-1)+'-'+_encoding+'"');
             }
             else 
                 doNotCompress();
@@ -267,10 +258,13 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
             throw new IllegalStateException("Compressed output stream is already assigned.");
         if (_out == null || _bOut != null)
         {
+            if (_wrapper.getETag()!=null)
+                setHeader("ETag",_wrapper.getETag());
+                
             _doNotCompress = true;
 
             _out = _response.getOutputStream();
-            setContentLength(_contentLength);
+            setContentLength();
 
             if (_bOut != null)
                 _out.write(_bOut.getBuf(),0,_bOut.getCount());
@@ -281,30 +275,32 @@ public abstract class AbstractCompressedStream extends ServletOutputStream
     /**
      * Check out.
      * 
-     * @param length
+     * @param lengthToWrite
      *            the length
      * @throws IOException
      *             Signals that an I/O exception has occurred.
      */
-    private void checkOut(int length) throws IOException
+    private void checkOut(int lengthToWrite) throws IOException
     {
         if (_closed)
             throw new IOException("CLOSED");
 
         if (_out == null)
         {
-            if (_response.isCommitted() || (_contentLength >= 0 && _contentLength < _minCompressSize))
+            long length=_wrapper.getContentLength();
+            if (_response.isCommitted() || (length >= 0 && length < _wrapper.getMinCompressSize()))
                 doNotCompress();
-            else if (length > _minCompressSize)
+            else if (lengthToWrite > _wrapper.getMinCompressSize())
                 doCompress();
             else
-                _out = _bOut = new ByteArrayOutputStream2(_bufferSize);
+                _out = _bOut = new ByteArrayOutputStream2(_wrapper.getBufferSize());
         }
         else if (_bOut != null)
         {
-            if (_response.isCommitted() || (_contentLength >= 0 && _contentLength < _minCompressSize))
+            long length=_wrapper.getContentLength();
+            if (_response.isCommitted() || (length >= 0 && length < _wrapper.getMinCompressSize()))
                 doNotCompress();
-            else if (length >= (_bOut.getBuf().length - _bOut.getCount()))
+            else if (lengthToWrite >= (_bOut.getBuf().length - _bOut.getCount()))
                 doCompress();
         }
     }

jetty-http/src/main/java/org/eclipse/jetty/http/gzip/CompressedResponseWrapper.java

@@ -48,15 +48,48 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
 
     private PrintWriter _writer;
     private AbstractCompressedStream _compressedStream;
+    private String _etag;
     private long _contentLength=-1;
     private boolean _noCompression;
 
+    /* ------------------------------------------------------------ */
     public CompressedResponseWrapper(HttpServletRequest request, HttpServletResponse response)
     {
         super(response);
         _request = request;
     }
 
+
+    /* ------------------------------------------------------------ */
+    public long getContentLength()
+    {
+        return _contentLength;
+    }
+
+    /* ------------------------------------------------------------ */
+    public int getBufferSize()
+    {
+        return _bufferSize;
+    }
+    
+    /* ------------------------------------------------------------ */
+    public int getMinCompressSize()
+    {
+        return _minCompressSize;
+    }
+    
+    /* ------------------------------------------------------------ */
+    public String getETag()
+    {
+        return _etag;
+    }
+
+    /* ------------------------------------------------------------ */
+    public HttpServletRequest getRequest()
+    {
+        return _request;
+    }
+    
     /* ------------------------------------------------------------ */
     /**
      * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#setMimeTypes(java.util.Set)
@@ -148,7 +181,7 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
     {
         _contentLength=length;
         if (_compressedStream!=null)
-            _compressedStream.setContentLength(length);
+            _compressedStream.setContentLength();
         else if (_noCompression && _contentLength>=0)
         {
             HttpServletResponse response = (HttpServletResponse)getResponse();
@@ -174,7 +207,7 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
         {
             _contentLength=Long.parseLong(value);
             if (_compressedStream!=null)
-                _compressedStream.setContentLength(_contentLength);
+                _compressedStream.setContentLength();
         }
         else if ("content-type".equalsIgnoreCase(name))
         {   
@@ -188,6 +221,8 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
                 noCompression();
             }
         }
+        else if ("etag".equalsIgnoreCase(name))
+            _etag=value;
         else
             super.addHeader(name,value);
     }
@@ -325,10 +360,21 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
                 noCompression();
             }
         }
+        else if ("etag".equalsIgnoreCase(name))
+            _etag=value;
         else
             super.setHeader(name,value);
     }
 
+    /* ------------------------------------------------------------ */
+    @Override
+    public boolean containsHeader(String name)
+    {
+        if ("etag".equalsIgnoreCase(name) && _etag!=null)
+            return true;
+        return super.containsHeader(name);
+    }
+
     /* ------------------------------------------------------------ */
     /**
      * @see org.eclipse.jetty.http.gzip.CompressedResponseWrapper#getOutputStream()
@@ -344,7 +390,7 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
                 return getResponse().getOutputStream();
             }
             
-            _compressedStream=newCompressedStream(_request,(HttpServletResponse)getResponse(),_contentLength,_bufferSize,_minCompressSize);
+            _compressedStream=newCompressedStream(_request,(HttpServletResponse)getResponse());
         }
         else if (_writer!=null)
             throw new IllegalStateException("getWriter() called");
@@ -370,7 +416,7 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
                 return getResponse().getWriter();
             }
             
-            _compressedStream=newCompressedStream(_request,(HttpServletResponse)getResponse(),_contentLength,_bufferSize,_minCompressSize);
+            _compressedStream=newCompressedStream(_request,(HttpServletResponse)getResponse());
             _writer=newWriter(_compressedStream,getCharacterEncoding());
         }
         return _writer;   
@@ -387,7 +433,7 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
         {
             _contentLength=value;
             if (_compressedStream!=null)
-                _compressedStream.setContentLength(_contentLength);
+                _compressedStream.setContentLength();
         }
         else
             super.setIntHeader(name,value);
@@ -411,6 +457,6 @@ public abstract class CompressedResponseWrapper extends HttpServletResponseWrapp
     /**
      *@return the underlying CompressedStream implementation 
      */
-    protected abstract AbstractCompressedStream newCompressedStream(HttpServletRequest _request, HttpServletResponse response, long _contentLength2, int _bufferSize2, int _minCompressedSize2) throws IOException;
+    protected abstract AbstractCompressedStream newCompressedStream(HttpServletRequest _request, HttpServletResponse response) throws IOException;
 
 }

jetty-overlay-deployer/src/main/java/org/eclipse/jetty/overlays/OverlayedAppProvider.java

@@ -432,7 +432,7 @@ public class OverlayedAppProvider extends AbstractLifeCycle implements AppProvid
                 context.setBaseResource(new ResourceCollection(instance_webapp,shared.getBaseResource()));
 
                 // Create the resource cache
-                ResourceCache cache = new ResourceCache(shared.getResourceCache(),instance_webapp,context.getMimeTypes());
+                ResourceCache cache = new ResourceCache(shared.getResourceCache(),instance_webapp,context.getMimeTypes(),false,false);
                 context.setAttribute(ResourceCache.class.getCanonicalName(),cache);
             }
             else

jetty-overlay-deployer/src/main/java/org/eclipse/jetty/overlays/TemplateContext.java

@@ -83,7 +83,7 @@ public class TemplateContext extends AggregateLifeCycle implements WebAppClassLo
         _server=server;
         _baseResource=baseResource;
         _mimeTypes=new MimeTypes();
-        _resourceCache=new ResourceCache(null,baseResource,_mimeTypes);
+        _resourceCache=new ResourceCache(null,baseResource,_mimeTypes,false,false);
         
         String[] patterns = (String[])_server.getAttribute(WebAppContext.SERVER_SRV_CLASSES);
         _serverClasses=new ClasspathPattern(patterns==null?WebAppContext.__dftServerClasses:patterns);

jetty-server/src/main/java/org/eclipse/jetty/server/AbstractHttpConnection.java

@@ -1111,7 +1111,7 @@ public abstract class AbstractHttpConnection  extends AbstractConnection
             if (super._generator.isWritten())
                 throw new IllegalStateException("!empty");
 
-            // Convert HTTP content to contentl
+            // Convert HTTP content to content
             if (content instanceof HttpContent)
             {
                 HttpContent httpContent = (HttpContent) content;
@@ -1146,13 +1146,20 @@ public abstract class AbstractHttpConnection  extends AbstractConnection
                 Buffer lm = httpContent.getLastModified();
                 long lml=httpContent.getResource().lastModified();
                 if (lm != null)
+                {
                     _responseFields.put(HttpHeaders.LAST_MODIFIED_BUFFER, lm);
+                }
                 else if (httpContent.getResource()!=null)
                 {
                     if (lml!=-1)
                         _responseFields.putDateField(HttpHeaders.LAST_MODIFIED_BUFFER, lml);
                 }
                 
+                Buffer etag=httpContent.getETag();
+                if (etag!=null)
+                    _responseFields.put(HttpHeaders.ETAG_BUFFER,etag);
+
+                
                 boolean direct=_connector instanceof NIOConnector && ((NIOConnector)_connector).getUseDirectBuffers() && !(_connector instanceof SslConnector);
                 content = direct?httpContent.getDirectBuffer():httpContent.getIndirectBuffer();
                 if (content==null)
@@ -1200,7 +1207,6 @@ public abstract class AbstractHttpConnection  extends AbstractConnection
                         resource.release();
                     else
                         in.close();
-
                 }
             }
             else

jetty-server/src/main/java/org/eclipse/jetty/server/ResourceCache.java

@@ -58,24 +58,18 @@ public class ResourceCache
     private final ResourceFactory _factory;
     private final ResourceCache _parent;
     private final MimeTypes _mimeTypes;
+    private final boolean _etags;
 
     private boolean  _useFileMappedBuffer=true;
     private int _maxCachedFileSize =4*1024*1024;
     private int _maxCachedFiles=2048;
     private int _maxCacheSize =32*1024*1024;
     
-    /* ------------------------------------------------------------ */
-    public ResourceCache(ResourceCache parent, ResourceFactory factory, MimeTypes mimeTypes,boolean useFileMappedBuffer)
-    {
-        this(parent,factory,mimeTypes);
-        setUseFileMappedBuffer(useFileMappedBuffer);
-    }
-    
     /* ------------------------------------------------------------ */
     /** Constructor.
      * @param mimeTypes Mimetype to use for meta data
      */
-    public ResourceCache(ResourceCache parent, ResourceFactory factory, MimeTypes mimeTypes)
+    public ResourceCache(ResourceCache parent, ResourceFactory factory, MimeTypes mimeTypes,boolean useFileMappedBuffer,boolean etags)
     {
         _factory = factory;
         _cache=new ConcurrentHashMap<String,Content>();
@@ -83,6 +77,7 @@ public class ResourceCache
         _cachedFiles=new AtomicInteger();
         _mimeTypes=mimeTypes;
         _parent=parent;
+        _etags=etags;
     }
 
     /* ------------------------------------------------------------ */
@@ -249,7 +244,7 @@ public class ResourceCache
             return content;
         }
         
-        return new HttpContent.ResourceAsHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()),getMaxCachedFileSize());
+        return new HttpContent.ResourceAsHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()),getMaxCachedFileSize(),_etags);
         
     }
     
@@ -361,6 +356,7 @@ public class ResourceCache
         final long _lastModified;
         final Buffer _lastModifiedBytes;
         final Buffer _contentType;
+        final Buffer _etagBuffer;
         
         volatile long _lastAccessed;
         AtomicReference<Buffer> _indirectBuffer=new AtomicReference<Buffer>();
@@ -381,6 +377,8 @@ public class ResourceCache
             _cachedSize.addAndGet(_length);
             _cachedFiles.incrementAndGet();
             _lastAccessed=System.currentTimeMillis();
+            
+            _etagBuffer=_etags?new ByteArrayBuffer(resource.getWeakETag()):null;
         }
 
 
@@ -408,10 +406,16 @@ public class ResourceCache
             return _resource;
         }
 
+        /* ------------------------------------------------------------ */
+        public Buffer getETag()
+        {
+            return _etagBuffer;
+        }
+        
         /* ------------------------------------------------------------ */
         boolean isValid()
         {
-            if (_lastModified==_resource.lastModified())
+            if (_lastModified==_resource.lastModified() && _length==_resource.length())
             {
                 _lastAccessed=System.currentTimeMillis();
                 return true;

jetty-server/src/main/java/org/eclipse/jetty/server/handler/GzipHandler.java

@@ -295,9 +295,9 @@ public class GzipHandler extends HandlerWrapper
             }
             
             @Override
-            protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minCompressSize) throws IOException
+            protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response) throws IOException
             {
-                return new AbstractCompressedStream("gzip",request,response,contentLength,bufferSize,minCompressSize)
+                return new AbstractCompressedStream("gzip",request,this)
                 {
                     @Override
                     protected DeflaterOutputStream createStream() throws IOException

jetty-server/src/main/java/org/eclipse/jetty/server/handler/ResourceHandler.java

@@ -69,6 +69,7 @@ public class ResourceHandler extends HandlerWrapper
     ByteArrayBuffer _cacheControl;
     boolean _aliases;
     boolean _directory;
+    boolean _etags;
 
     /* ------------------------------------------------------------ */
     public ResourceHandler()
@@ -128,6 +129,24 @@ public class ResourceHandler extends HandlerWrapper
         _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()
@@ -419,6 +438,21 @@ public class ResourceHandler extends HandlerWrapper
 
         // 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);
@@ -436,6 +470,9 @@ public class ResourceHandler extends HandlerWrapper
         // 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

jetty-server/src/test/java/org/eclipse/jetty/server/ResourceCacheTest.java

@@ -46,9 +46,9 @@ public class ResourceCacheTest
         Resource[] r = rc.getResources();
         MimeTypes mime = new MimeTypes();
         
-        ResourceCache rc3 = new ResourceCache(null,r[2],mime,false);
+        ResourceCache rc3 = new ResourceCache(null,r[2],mime,false,false);
-        ResourceCache rc2 = new ResourceCache(rc3,r[1],mime,false);
+        ResourceCache rc2 = new ResourceCache(rc3,r[1],mime,false,false);
-        ResourceCache rc1 = new ResourceCache(rc2,r[0],mime,false);
+        ResourceCache rc1 = new ResourceCache(rc2,r[0],mime,false,false);
         
         assertEquals("1 - one", getContent(rc1, "1.txt"));
         assertEquals("2 - two", getContent(rc1, "2.txt"));
@@ -76,8 +76,8 @@ public class ResourceCacheTest
         Resource[] r = rc.getResources();
         MimeTypes mime = new MimeTypes();
         
-        ResourceCache rc3 = new ResourceCache(null,r[2],mime,false);
+        ResourceCache rc3 = new ResourceCache(null,r[2],mime,false,false);
-        ResourceCache rc2 = new ResourceCache(rc3,r[1],mime,false)
+        ResourceCache rc2 = new ResourceCache(rc3,r[1],mime,false,false)
         {
             @Override
             public boolean isCacheable(Resource resource)
@@ -86,7 +86,7 @@ public class ResourceCacheTest
             }
         };
         
-        ResourceCache rc1 = new ResourceCache(rc2,r[0],mime,false);
+        ResourceCache rc1 = new ResourceCache(rc2,r[0],mime,false,false);
         
         assertEquals("1 - one", getContent(rc1, "1.txt"));
         assertEquals("2 - two", getContent(rc1, "2.txt"));
@@ -126,7 +126,7 @@ public class ResourceCacheTest
         directory=Resource.newResource(files[0].getParentFile().getAbsolutePath());
 
         
-        cache=new ResourceCache(null,directory,new MimeTypes(),false);
+        cache=new ResourceCache(null,directory,new MimeTypes(),false,false);
         
         cache.setMaxCacheSize(95);
         cache.setMaxCachedFileSize(85);

jetty-servlet/src/main/java/org/eclipse/jetty/servlet/DefaultServlet.java

@@ -58,6 +58,7 @@ import org.eclipse.jetty.server.nio.NIOConnector;
 import org.eclipse.jetty.server.ssl.SslConnector;
 import org.eclipse.jetty.util.IO;
 import org.eclipse.jetty.util.MultiPartOutputStream;
+import org.eclipse.jetty.util.QuotedStringTokenizer;
 import org.eclipse.jetty.util.URIUtil;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
@@ -117,6 +118,8 @@ import org.eclipse.jetty.util.resource.ResourceFactory;
  *  aliases           If True, aliases of resources are allowed (eg. symbolic
  *                    links and caps variations). May bypass security constraints.
  *                    
+ *  etags             If True, weak etags will be handled.
+ *
  *  maxCacheSize      The maximum total size of the cache or 0 for no cache.
  *  maxCachedFileSize The maximum size of a file to cache
  *  maxCachedFiles    The maximum number of files to cache
@@ -152,6 +155,7 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
     private boolean _redirectWelcome=false;
     private boolean _gzip=true;
     private boolean _pathInfoOnly=false;
+    private boolean _etags=false;
 
     private Resource _resourceBase;
     private ResourceCache _cache;
@@ -262,11 +266,13 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
             LOG.debug("Cache {}={}",resourceCache,_cache);
         }
 
+        _etags = getInitBoolean("etags",_etags);
+        
         try
         {
             if (_cache==null && max_cached_files>0)
             {
-                _cache= new ResourceCache(null,this,_mimeTypes,_useFileMappedBuffer);
+                _cache= new ResourceCache(null,this,_mimeTypes,_useFileMappedBuffer,_etags);
 
                 if (max_cache_size>0)
                     _cache.setMaxCacheSize(max_cache_size);
@@ -287,6 +293,7 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
             if (h.getServletInstance()==this)
                 _defaultHolder=h;
 
+        
         if (LOG.isDebugEnabled()) 
             LOG.debug("resource base = "+_resourceBase);
     }
@@ -499,7 +506,7 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
                 {
                     // ensure we have content
                     if (content==null)
-                        content=new HttpContent.ResourceAsHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()),response.getBufferSize());
+                        content=new HttpContent.ResourceAsHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()),response.getBufferSize(),_etags);
 
                     if (included.booleanValue() || passConditionalHeaders(request,response, resource,content))
                     {
@@ -570,7 +577,7 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
                 }
                 else
                 {
-                    content=new HttpContent.ResourceAsHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()));
+                    content=new HttpContent.ResourceAsHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()),_etags);
                     if (included.booleanValue() || passConditionalHeaders(request,response, resource,content))
                         sendDirectory(request,response,resource,pathInContext);
                 }
@@ -672,6 +679,75 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
         {
             if (!request.getMethod().equals(HttpMethods.HEAD) )
             {
+                if (_etags)
+                {
+                    String ifm=request.getHeader(HttpHeaders.IF_MATCH);
+                    if (ifm!=null)
+                    {
+                        boolean match=false;
+                        if (content!=null && content.getETag()!=null)
+                        {
+                            QuotedStringTokenizer quoted = new QuotedStringTokenizer(ifm,", ",false,true);
+                            while (!match && quoted.hasMoreTokens())
+                            {
+                                String tag = quoted.nextToken();
+                                if (content.getETag().toString().equals(tag))
+                                    match=true;
+                            }
+                        }
+
+                        if (!match)
+                        {
+                            Response r = Response.getResponse(response);
+                            r.reset(true);
+                            r.setStatus(HttpServletResponse.SC_PRECONDITION_FAILED);
+                            return false;
+                        }
+                    }
+                    
+                    String ifnm=request.getHeader(HttpHeaders.IF_NONE_MATCH);
+                    if (ifnm!=null && content!=null && content.getETag()!=null)
+                    {
+                        // Look for GzipFiltered version of etag
+                        if (content.getETag().toString().equals(request.getAttribute("o.e.j.s.GzipFilter.ETag")))
+                        {
+                            Response r = Response.getResponse(response);
+                            r.reset(true);
+                            r.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
+                            r.getHttpFields().put(HttpHeaders.ETAG_BUFFER,ifnm);
+                            return false;
+                        }
+                        
+                        
+                        // Handle special case of exact match.
+                        if (content.getETag().toString().equals(ifnm))
+                        {
+                            Response r = Response.getResponse(response);
+                            r.reset(true);
+                            r.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
+                            r.getHttpFields().put(HttpHeaders.ETAG_BUFFER,content.getETag());
+                            return false;
+                        }
+
+                        // Handle list of tags
+                        QuotedStringTokenizer quoted = new QuotedStringTokenizer(ifnm,", ",false,true);
+                        while (quoted.hasMoreTokens())
+                        {
+                            String tag = quoted.nextToken();
+                            if (content.getETag().toString().equals(tag))
+                            {
+                                Response r = Response.getResponse(response);
+                                r.reset(true);
+                                r.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
+                                r.getHttpFields().put(HttpHeaders.ETAG_BUFFER,content.getETag());
+                                return false;
+                            }
+                        }
+                        
+                        return true;
+                    }
+                }
+                
                 String ifms=request.getHeader(HttpHeaders.IF_MODIFIED_SINCE);
                 if (ifms!=null)
                 {
@@ -991,6 +1067,9 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
                 r.setLongContentLength(count);
 
             writeOptionHeaders(fields);
+            
+            if (_etags)
+                fields.put(HttpHeaders.ETAG_BUFFER,content.getETag());
         }
         else
         {
@@ -1007,6 +1086,9 @@ public class DefaultServlet extends HttpServlet implements ResourceFactory
             }
 
             writeOptionHeaders(response);
+
+            if (_etags)
+                response.setHeader(HttpHeaders.ETAG,content.getETag().toString());
         }
     }
 

jetty-servlet/src/test/java/org/eclipse/jetty/servlet/DefaultServletTest.java

@@ -25,6 +25,8 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.EnumSet;
 import javax.servlet.DispatcherType;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import javax.servlet.Filter;
 import javax.servlet.FilterChain;
 import javax.servlet.FilterConfig;
@@ -34,14 +36,17 @@ import javax.servlet.ServletResponse;
 
 import junit.framework.AssertionFailedError;
 
+import org.eclipse.jetty.http.HttpFields;
 import org.eclipse.jetty.server.LocalConnector;
 import org.eclipse.jetty.server.Server;
 import org.eclipse.jetty.toolchain.test.FS;
 import org.eclipse.jetty.toolchain.test.MavenTestingUtils;
 import org.eclipse.jetty.toolchain.test.OS;
 import org.eclipse.jetty.toolchain.test.TestingDir;
+import org.eclipse.jetty.util.DateCache;
 import org.eclipse.jetty.util.IO;
 import org.eclipse.jetty.util.StringUtil;
+import org.hamcrest.Matchers;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
@@ -579,6 +584,123 @@ public class DefaultServletTest
         assertResponseNotContains("Content-Length: 12", response);
     }
 
+
+    @Test
+    public void testIfModifiedSmall() throws Exception
+    {
+        testIfModified("Hello World");
+    }
+    
+    @Test
+    public void testIfModifiedLarge() throws Exception
+    {
+        testIfModified("Now is the time for all good men to come to the aid of the party");
+    }
+
+    public void testIfModified(String content) throws Exception
+    {
+        testdir.ensureEmpty();
+        File resBase = testdir.getFile("docroot");
+        FS.ensureDirExists(resBase);
+        File file = new File(resBase, "file.txt");
+
+        String resBasePath = resBase.getAbsolutePath();
+
+        ServletHolder defholder = context.addServlet(DefaultServlet.class, "/");
+        defholder.setInitParameter("resourceBase", resBasePath);
+        defholder.setInitParameter("maxCacheSize", "4096");
+        defholder.setInitParameter("maxCachedFileSize", "25");
+        defholder.setInitParameter("maxCachedFiles", "100");
+
+        String response = connector.getResponses("GET /context/file.txt HTTP/1.0\r\n\r\n");
+        assertResponseContains("404", response);
+
+        createFile(file, content);
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\n\r\n");
+
+        assertResponseContains("200", response);
+        assertResponseContains("Last-Modified", response);
+        String last_modified = getHeaderValue("Last-Modified",response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Modified-Since: "+last_modified+"\r\n\r\n");
+        assertResponseContains("304", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Modified-Since: "+HttpFields.formatDate(System.currentTimeMillis()-10000)+"\r\n\r\n");
+        assertResponseContains("200", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Modified-Since: "+HttpFields.formatDate(System.currentTimeMillis()+10000)+"\r\n\r\n");
+        assertResponseContains("304", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Unmodified-Since: "+HttpFields.formatDate(System.currentTimeMillis()+10000)+"\r\n\r\n");
+        assertResponseContains("200", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Unmodified-Since: "+HttpFields.formatDate(System.currentTimeMillis()-10000)+"\r\n\r\n");
+        assertResponseContains("412", response);
+    }
+
+    @Test
+    public void testIfETagSmall() throws Exception
+    {
+        testIfETag("Hello World");
+    }
+    
+    @Test
+    public void testIfETagLarge() throws Exception
+    {
+        testIfETag("Now is the time for all good men to come to the aid of the party");
+    }
+
+    public void testIfETag(String content) throws Exception
+    {
+        testdir.ensureEmpty();
+        File resBase = testdir.getFile("docroot");
+        FS.ensureDirExists(resBase);
+        File file = new File(resBase, "file.txt");
+
+        String resBasePath = resBase.getAbsolutePath();
+
+        ServletHolder defholder = context.addServlet(DefaultServlet.class, "/");
+        defholder.setInitParameter("resourceBase", resBasePath);
+        defholder.setInitParameter("maxCacheSize", "4096");
+        defholder.setInitParameter("maxCachedFileSize", "25");
+        defholder.setInitParameter("maxCachedFiles", "100");
+        defholder.setInitParameter("etags", "true");
+
+        String response;
+
+        createFile(file, content);
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\n\r\n");
+
+        assertResponseContains("200", response);
+        assertResponseContains("ETag", response);
+        String etag = getHeaderValue("ETag",response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-None-Match: "+etag+"\r\n\r\n");
+        assertResponseContains("304", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-None-Match: wibble,"+etag+",wobble\r\n\r\n");
+        assertResponseContains("304", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-None-Match: wibble\r\n\r\n");
+        assertResponseContains("200", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-None-Match: wibble, wobble\r\n\r\n");
+        assertResponseContains("200", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Match: "+etag+"\r\n\r\n");
+        assertResponseContains("200", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Match: wibble,"+etag+",wobble\r\n\r\n");
+        assertResponseContains("200", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Match: wibble\r\n\r\n");
+        assertResponseContains("412", response);
+        
+        response = connector.getResponses("GET /context/file.txt HTTP/1.1\r\nHost:test\r\nConnection:close\r\nIf-Match: wibble, wobble\r\n\r\n");
+        assertResponseContains("412", response);
+        
+    }
+    
     public static class OutputFilter implements Filter
     {
         public void init(FilterConfig filterConfig) throws ServletException
@@ -645,18 +767,8 @@ public class DefaultServletTest
 
     private int assertResponseContains(String expected, String response)
     {
-        int idx = response.indexOf(expected);
+        Assert.assertThat(response,Matchers.containsString(expected));
-        if (idx == (-1))
+        return response.indexOf(expected);
-        {
-            // Not found
-            StringBuffer err = new StringBuffer();
-            err.append("Response does not contain expected string \"").append(expected).append("\"");
-            err.append("\n").append(response);
-
-            System.err.println(err);
-            throw new AssertionFailedError(err.toString());
-        }
-        return idx;
     }
 
     private void deleteFile(File file) throws IOException
@@ -681,4 +793,13 @@ public class DefaultServletTest
             Assert.assertTrue("Deleting: " + file.getName(), file.delete());
         }
     }
+    
+    private String getHeaderValue(String header, String response)
+    {
+        Pattern pattern=Pattern.compile("[\\r\\n]"+header+"\\s*:\\s*(.*?)\\s*[\\r\\n]");
+        Matcher matcher = pattern.matcher(response);
+        if (matcher.find())
+            return matcher.group(1);
+        return null;
+    }
 }

jetty-servlets/src/main/java/org/eclipse/jetty/servlets/GzipFilter.java

@@ -106,8 +106,10 @@ public class GzipFilter extends UserAgentFilter
 {
     private static final Logger LOG = Log.getLogger(GzipFilter.class);
     public final static String GZIP="gzip";
+    public final static String ETAG_GZIP="-gzip\"";
     public final static String DEFLATE="deflate";
-    
+    public final static String ETAG_DEFLATE="-deflate\"";
+    public final static String ETAG="o.e.j.s.GzipFilter.ETag";
 
     protected Set<String> _mimeTypes;
     protected int _bufferSize=8192;
@@ -235,6 +237,16 @@ public class GzipFilter extends UserAgentFilter
                 return;
             }
             
+            // Special handling for etags
+            String etag = request.getHeader("If-None-Match"); 
+            if (etag!=null)
+            {
+                if (etag.endsWith(ETAG_GZIP))
+                    request.setAttribute(ETAG,etag.substring(0,etag.length()-ETAG_GZIP.length())+'"');
+                else if (etag.endsWith(ETAG_DEFLATE))
+                    request.setAttribute(ETAG,etag.substring(0,etag.length()-ETAG_DEFLATE.length())+'"');
+            }
+            
             CompressedResponseWrapper wrappedResponse = createWrappedResponse(request,response,compressionType);
             
             boolean exceptional=true;
@@ -362,9 +374,9 @@ public class GzipFilter extends UserAgentFilter
             wrappedResponse = new CompressedResponseWrapper(request,response)
             {
                 @Override
-                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minCompressSize) throws IOException
+                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response) throws IOException
                 {
-                    return new AbstractCompressedStream(compressionType,request,response,contentLength,bufferSize,minCompressSize)
+                    return new AbstractCompressedStream(compressionType,request,this)
                     {
                         @Override
                         protected DeflaterOutputStream createStream() throws IOException
@@ -380,9 +392,9 @@ public class GzipFilter extends UserAgentFilter
             wrappedResponse = new CompressedResponseWrapper(request,response)
             {
                 @Override
-                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minCompressSize) throws IOException
+                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response) throws IOException
                 {
-                    return new AbstractCompressedStream(compressionType,request,response,contentLength,bufferSize,minCompressSize)
+                    return new AbstractCompressedStream(compressionType,request,this)
                     {
                         @Override
                         protected DeflaterOutputStream createStream() throws IOException

jetty-servlets/src/main/java/org/eclipse/jetty/servlets/IncludableGzipFilter.java

@@ -75,9 +75,9 @@ public class IncludableGzipFilter extends GzipFilter
             wrappedResponse = new IncludableResponseWrapper(request,response)
             {
                 @Override
-                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minCompressSize) throws IOException
+                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response) throws IOException
                 {
-                    return new AbstractCompressedStream(compressionType,request,response,contentLength,bufferSize,minCompressSize)
+                    return new AbstractCompressedStream(compressionType,request,this)
                     {
                         @Override
                         protected DeflaterOutputStream createStream() throws IOException
@@ -102,9 +102,9 @@ public class IncludableGzipFilter extends GzipFilter
             wrappedResponse = new IncludableResponseWrapper(request,response)
             {
                 @Override
-                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minCompressSize) throws IOException
+                protected AbstractCompressedStream newCompressedStream(HttpServletRequest request,HttpServletResponse response) throws IOException
                 {
-                    return new AbstractCompressedStream(compressionType,request,response,contentLength,bufferSize,minCompressSize)
+                    return new AbstractCompressedStream(compressionType,request,this)
                     {
                         @Override
                         protected DeflaterOutputStream createStream() throws IOException

jetty-util/src/main/java/org/eclipse/jetty/util/B64Code.java

@@ -19,6 +19,7 @@
 package org.eclipse.jetty.util;
 
 import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 
 
@@ -33,8 +34,8 @@ import java.io.UnsupportedEncodingException;
 public class B64Code
 {
     // ------------------------------------------------------------------
-    static final char pad='=';
+    static final char __pad='=';
-    static final char[] rfc1421alphabet=
+    static final char[] __rfc1421alphabet=
             {
                 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
                 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
@@ -42,16 +43,16 @@ public class B64Code
                 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
             };
 
-    static final byte[] rfc1421nibbles;
+    static final byte[] __rfc1421nibbles;
 
     static
     {
-        rfc1421nibbles=new byte[256];
+        __rfc1421nibbles=new byte[256];
         for (int i=0;i<256;i++)
-            rfc1421nibbles[i]=-1;
+            __rfc1421nibbles[i]=-1;
         for (byte b=0;b<64;b++)
-            rfc1421nibbles[(byte)rfc1421alphabet[b]]=b;
+            __rfc1421nibbles[(byte)__rfc1421alphabet[b]]=b;
-        rfc1421nibbles[(byte)pad]=0;
+        __rfc1421nibbles[(byte)__pad]=0;
     }
 
     // ------------------------------------------------------------------
@@ -104,7 +105,54 @@ public class B64Code
      */
     static public char[] encode(byte[] b)
     {
-        return encode(b,false);
+        if (b==null)
+            return null;
+
+        int bLen=b.length;
+        int cLen=((bLen+2)/3)*4;
+        char c[]=new char[cLen];
+        int ci=0;
+        int bi=0;
+        byte b0, b1, b2;
+        int stop=(bLen/3)*3;
+        while (bi<stop)
+        {
+            b0=b[bi++];
+            b1=b[bi++];
+            b2=b[bi++];
+            c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+            c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+            c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f|(b2>>>6)&0x03];
+            c[ci++]=__rfc1421alphabet[b2&077];
+        }
+
+        if (bLen!=bi)
+        {
+            switch (bLen%3)
+            {
+                case 2:
+                    b0=b[bi++];
+                    b1=b[bi++];
+                    c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+                    c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+                    c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f];
+                    c[ci++]=__pad;
+                    break;
+
+                case 1:
+                    b0=b[bi++];
+                    c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
+                    c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f];
+                    c[ci++]=__pad;
+                    c[ci++]=__pad;
+                    break;
+
+                default:
+                    break;
+            }
+        }
+
+        return c;
     }
     
     // ------------------------------------------------------------------
@@ -120,11 +168,12 @@ public class B64Code
     {
         if (b==null)
             return null;
+        if (!rfc2045)
+            return encode(b);
 
         int bLen=b.length;
         int cLen=((bLen+2)/3)*4;
-        if (rfc2045)
+        cLen+=2+2*(cLen/76);
-            cLen+=2+2*cLen/76;
         char c[]=new char[cLen];
         int ci=0;
         int bi=0;
@@ -136,12 +185,12 @@ public class B64Code
             b0=b[bi++];
             b1=b[bi++];
             b2=b[bi++];
-            c[ci++]=rfc1421alphabet[(b0>>>2)&0x3f];
+            c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
-            c[ci++]=rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+            c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
-            c[ci++]=rfc1421alphabet[(b1<<2)&0x3f|(b2>>>6)&0x03];
+            c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f|(b2>>>6)&0x03];
-            c[ci++]=rfc1421alphabet[b2&077];
+            c[ci++]=__rfc1421alphabet[b2&077];
             l+=4;
-            if (rfc2045 && l%76==0)
+            if (l%76==0)
             {
                 c[ci++]=13;
                 c[ci++]=10;
@@ -155,18 +204,18 @@ public class B64Code
                 case 2:
                     b0=b[bi++];
                     b1=b[bi++];
-                    c[ci++]=rfc1421alphabet[(b0>>>2)&0x3f];
+                    c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
-                    c[ci++]=rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
+                    c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f|(b1>>>4)&0x0f];
-                    c[ci++]=rfc1421alphabet[(b1<<2)&0x3f];
+                    c[ci++]=__rfc1421alphabet[(b1<<2)&0x3f];
-                    c[ci++]=pad;
+                    c[ci++]=__pad;
                     break;
 
                 case 1:
                     b0=b[bi++];
-                    c[ci++]=rfc1421alphabet[(b0>>>2)&0x3f];
+                    c[ci++]=__rfc1421alphabet[(b0>>>2)&0x3f];
-                    c[ci++]=rfc1421alphabet[(b0<<4)&0x3f];
+                    c[ci++]=__rfc1421alphabet[(b0<<4)&0x3f];
-                    c[ci++]=pad;
+                    c[ci++]=__pad;
-                    c[ci++]=pad;
+                    c[ci++]=__pad;
                     break;
 
                 default:
@@ -174,11 +223,8 @@ public class B64Code
             }
         }
 
-        if (rfc2045)
+        c[ci++]=13;
-        {
+        c[ci++]=10;
-            c[ci++]=13;
-            c[ci++]=10;
-        }
         return c;
     }
 
@@ -226,7 +272,7 @@ public class B64Code
             throw new IllegalArgumentException("Input block size is not 4");
 
         int li=bLen-1;
-        while (li>=0 && b[li]==(byte)pad)
+        while (li>=0 && b[li]==(byte)__pad)
             li--;
 
         if (li<0)
@@ -243,10 +289,10 @@ public class B64Code
         {
             while (ri<stop)
             {
-                b0=rfc1421nibbles[b[bi++]];
+                b0=__rfc1421nibbles[b[bi++]];
-                b1=rfc1421nibbles[b[bi++]];
+                b1=__rfc1421nibbles[b[bi++]];
-                b2=rfc1421nibbles[b[bi++]];
+                b2=__rfc1421nibbles[b[bi++]];
-                b3=rfc1421nibbles[b[bi++]];
+                b3=__rfc1421nibbles[b[bi++]];
                 if (b0<0 || b1<0 || b2<0 || b3<0)
                     throw new IllegalArgumentException("Not B64 encoded");
 
@@ -260,9 +306,9 @@ public class B64Code
                 switch (rLen%3)
                 {
                     case 2:
-                        b0=rfc1421nibbles[b[bi++]];
+                        b0=__rfc1421nibbles[b[bi++]];
-                        b1=rfc1421nibbles[b[bi++]];
+                        b1=__rfc1421nibbles[b[bi++]];
-                        b2=rfc1421nibbles[b[bi++]];
+                        b2=__rfc1421nibbles[b[bi++]];
                         if (b0<0 || b1<0 || b2<0)
                             throw new IllegalArgumentException("Not B64 encoded");
                         r[ri++]=(byte)(b0<<2|b1>>>4);
@@ -270,8 +316,8 @@ public class B64Code
                         break;
 
                     case 1:
-                        b0=rfc1421nibbles[b[bi++]];
+                        b0=__rfc1421nibbles[b[bi++]];
-                        b1=rfc1421nibbles[b[bi++]];
+                        b1=__rfc1421nibbles[b[bi++]];
                         if (b0<0 || b1<0)
                             throw new IllegalArgumentException("Not B64 encoded");
                         r[ri++]=(byte)(b0<<2|b1>>>4);
@@ -314,17 +360,17 @@ public class B64Code
         {
             char c=encoded.charAt(ci++);
 
-            if (c==pad)
+            if (c==__pad)
                 break;
             
             if (Character.isWhitespace(c))
                 continue;
 
-            byte nibble=rfc1421nibbles[c];
+            byte nibble=__rfc1421nibbles[c];
             if (nibble<0)
                 throw new IllegalArgumentException("Not B64 encoded");
 
-            nibbles[s++]=rfc1421nibbles[c];
+            nibbles[s++]=__rfc1421nibbles[c];
 
             switch(s)
             {
@@ -346,4 +392,36 @@ public class B64Code
 
         return bout.toByteArray();
     }
+    
+    /* ------------------------------------------------------------ */
+    public static void encode(int value,Appendable buf) throws IOException
+    {
+        buf.append(__rfc1421alphabet[0x3f&((0xFC000000&value)>>26)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x03F00000&value)>>20)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x000FC000&value)>>14)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x00003F00&value)>>8)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x000000FC&value)>>2)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x00000003&value)<<4)]);
+        buf.append('=');
+    }
+    
+    /* ------------------------------------------------------------ */
+    public static void encode(long lvalue,Appendable buf) throws IOException
+    {
+        int value=(int)(0xFFFFFFFC&(lvalue>>32));
+        buf.append(__rfc1421alphabet[0x3f&((0xFC000000&value)>>26)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x03F00000&value)>>20)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x000FC000&value)>>14)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x00003F00&value)>>8)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x000000FC&value)>>2)]);
+        
+        buf.append(__rfc1421alphabet[0x3f&((0x00000003&value)<<4) + (0xf&(int)(lvalue>>28))]);
+        
+        value=0x0FFFFFFF&(int)lvalue;
+        buf.append(__rfc1421alphabet[0x3f&((0x0FC00000&value)>>22)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x003F0000&value)>>16)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x0000FC00&value)>>10)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x000003F0&value)>>4)]);
+        buf.append(__rfc1421alphabet[0x3f&((0x0000000F&value)<<2)]);
+    }
 }

jetty-util/src/main/java/org/eclipse/jetty/util/TypeUtil.java

@@ -374,15 +374,10 @@ public class TypeUtil
     {
         try
         {
-            int bi=0xff&b;
+            int d=0xf&((0xF0&b)>>4);
-            int c='0'+(bi/16)%16;
+            buf.append((char)((d>9?('A'-10):'0')+d));
-            if (c>'9')
+            d=0xf&b;
-                c= 'A'+(c-'0'-10);
+            buf.append((char)((d>9?('A'-10):'0')+d));
-            buf.append((char)c);
-            c='0'+bi%16;
-            if (c>'9')
-                c= 'A'+(c-'0'-10);
-            buf.append((char)c);
         }
         catch(IOException e)
         {
@@ -390,6 +385,37 @@ public class TypeUtil
         }
     }
 
+    /* ------------------------------------------------------------ */
+    public static void toHex(int value,Appendable buf) throws IOException
+    {
+        int d=0xf&((0xF0000000&value)>>28);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&((0x0F000000&value)>>24);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&((0x00F00000&value)>>20);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&((0x000F0000&value)>>16);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&((0x0000F000&value)>>12);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&((0x00000F00&value)>>8);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&((0x000000F0&value)>>4);
+        buf.append((char)((d>9?('A'-10):'0')+d));
+        d=0xf&value;
+        buf.append((char)((d>9?('A'-10):'0')+d));
+    
+        Integer.toString(0,36);
+    }
+    
+    
+    /* ------------------------------------------------------------ */
+    public static void toHex(long value,Appendable buf) throws IOException
+    {
+        toHex((int)(value>>32),buf);
+        toHex((int)value,buf);
+    }
+
     /* ------------------------------------------------------------ */
     public static String toHexString(byte b)
     {

jetty-util/src/main/java/org/eclipse/jetty/util/resource/Resource.java

@@ -31,6 +31,7 @@ import java.text.DateFormat;
 import java.util.Arrays;
 import java.util.Date;
 
+import org.eclipse.jetty.util.B64Code;
 import org.eclipse.jetty.util.IO;
 import org.eclipse.jetty.util.Loader;
 import org.eclipse.jetty.util.StringUtil;
@@ -49,6 +50,7 @@ public abstract class Resource implements ResourceFactory
     public static boolean __defaultUseCaches = true;
     volatile Object _associate;
 
+    /* ------------------------------------------------------------ */
     /**
      * Change the default setting for url connection caches.
      * Subsequent URLConnections will use this default.
@@ -662,6 +664,31 @@ public abstract class Resource implements ResourceFactory
         writeTo(new FileOutputStream(destination),0,-1);
     }
 
+    /* ------------------------------------------------------------ */
+    public String getWeakETag()
+    {
+        try
+        {
+            StringBuilder b = new StringBuilder(32);
+            b.append("W/\"");
+            
+            String name=getName();
+            int length=name.length();
+            long lhash=0;
+            for (int i=0; i<length;i++)
+                lhash=31*lhash+name.charAt(i);
+            
+            B64Code.encode(lastModified()^lhash,b);
+            B64Code.encode(length()^lhash,b);
+            b.append('"');
+            return b.toString();
+        } 
+        catch (IOException e)
+        {
+            throw new RuntimeException(e);
+        }
+    }
+    
     /* ------------------------------------------------------------ */
     /** Generate a properly encoded URL from a {@link File} instance.
      * @param file Target file. 

jetty-util/src/test/java/org/eclipse/jetty/util/B64CodeTest.java

@@ -0,0 +1,85 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2012 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.util;
+
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+public class B64CodeTest
+{
+    String text = "Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure.";
+    
+    @Test
+    public void testRFC1421() throws Exception
+    {
+        String b64 = B64Code.encode(text,StringUtil.__ISO_8859_1);
+        Assert.assertEquals("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz"+
+                "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg"+
+                "dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu"+
+                "dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo"+
+                "ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=",b64);
+        
+        char[] chars = B64Code.encode(text.getBytes(StringUtil.__ISO_8859_1),false);
+        b64 = new String(chars,0,chars.length);
+        Assert.assertEquals("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz"+
+                "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg"+
+                "dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu"+
+                "dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo"+
+                "ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=",b64);
+        
+    }
+
+    @Test
+    public void testRFC2045() throws Exception
+    {
+        char[] chars = B64Code.encode(text.getBytes(StringUtil.__ISO_8859_1),true);
+        String b64 = new String(chars,0,chars.length);
+        Assert.assertEquals("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz\r\n"+
+                "IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg\r\n"+
+                "dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu\r\n"+
+                "dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo\r\n"+
+                "ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=\r\n",b64);
+        
+    }
+    
+
+    @Test
+    public void testInteger() throws Exception
+    {
+        byte[] bytes = text.getBytes(StringUtil.__ISO_8859_1);
+        int value=(bytes[0]<<24)+(bytes[1]<<16)+(bytes[2]<<8)+(bytes[3]);
+        
+        StringBuilder b = new StringBuilder();
+        B64Code.encode(value,b);
+        Assert.assertEquals("TWFuIA=",b.toString());
+    }
+    @Test
+    public void testLong() throws Exception
+    {
+        byte[] bytes = text.getBytes(StringUtil.__ISO_8859_1);
+        long value=((0xffL&bytes[0])<<56)+((0xffL&bytes[1])<<48)+((0xffL&bytes[2])<<40)+((0xffL&bytes[3])<<32)+
+                ((0xffL&bytes[4])<<24)+((0xffL&bytes[5])<<16)+((0xffL&bytes[6])<<8)+(0xffL&bytes[7]);
+        
+        StringBuilder b = new StringBuilder();
+        B64Code.encode(value,b);
+        Assert.assertEquals("TWFuIGlzIGQ",b.toString());
+    }
+}

jetty-util/src/test/java/org/eclipse/jetty/util/TypeUtilTest.java

@@ -0,0 +1,76 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2012 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.util;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+public class TypeUtilTest
+{
+
+    @Test
+    public void testToHexInt() throws Exception
+    {
+        StringBuilder b = new StringBuilder();
+        
+        b.setLength(0);
+        TypeUtil.toHex((int)0,b);
+        Assert.assertEquals("00000000",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(Integer.MAX_VALUE,b);
+        Assert.assertEquals("7FFFFFFF",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(Integer.MIN_VALUE,b);
+        Assert.assertEquals("80000000",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(0x12345678,b);
+        Assert.assertEquals("12345678",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(0x9abcdef0,b);
+        Assert.assertEquals("9ABCDEF0",b.toString());
+    }
+
+    @Test
+    public void testToHexLong() throws Exception
+    {
+        StringBuilder b = new StringBuilder();
+        
+        b.setLength(0);
+        TypeUtil.toHex((long)0,b);
+        Assert.assertEquals("0000000000000000",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(Long.MAX_VALUE,b);
+        Assert.assertEquals("7FFFFFFFFFFFFFFF",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(Long.MIN_VALUE,b);
+        Assert.assertEquals("8000000000000000",b.toString());
+        
+        b.setLength(0);
+        TypeUtil.toHex(0x123456789abcdef0L,b);
+        Assert.assertEquals("123456789ABCDEF0",b.toString());
+    }
+
+}

test-jetty-webapp/src/main/webapp/WEB-INF/web.xml

@@ -85,6 +85,7 @@
   <filter-mapping>
     <filter-name>GzipFilter</filter-name>
     <url-pattern>/dump/gzip/*</url-pattern>
+    <url-pattern>*.txt</url-pattern>
   </filter-mapping>