lib/jetty/org/eclipse/jetty/http/HttpContent.java

   1 //
   2 //  ========================================================================
   3 //  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
   4 //  ------------------------------------------------------------------------
   5 //  All rights reserved. This program and the accompanying materials
   6 //  are made available under the terms of the Eclipse Public License v1.0
   7 //  and Apache License v2.0 which accompanies this distribution.
   8 //
   9 //      The Eclipse Public License is available at
  10 //      http://www.eclipse.org/legal/epl-v10.html
  11 //
  12 //      The Apache License v2.0 is available at
  13 //      http://www.opensource.org/licenses/apache2.0.php
  14 //
  15 //  You may elect to redistribute this code under either of these licenses.
  16 //  ========================================================================
  17 //
  18
  19 package org.eclipse.jetty.http;
  20
  21 import java.io.IOException;
  22 import java.io.InputStream;
  23 import java.nio.ByteBuffer;
  24 import java.nio.channels.ReadableByteChannel;
  25
  26 import org.eclipse.jetty.util.BufferUtil;
  27 import org.eclipse.jetty.util.resource.Resource;
  28
  29 /* ------------------------------------------------------------ */
  30 /** HttpContent.
  31  *
  32  *
  33  */
  34 public interface HttpContent
  35 {
  36     String getContentType();
  37     String getLastModified();
  38     ByteBuffer getIndirectBuffer();
  39     ByteBuffer getDirectBuffer();
  40     String getETag();
  41     Resource getResource();
  42     long getContentLength();
  43     InputStream getInputStream() throws IOException;
  44     ReadableByteChannel getReadableByteChannel() throws IOException;
  45     void release();
  46
  47     /* ------------------------------------------------------------ */
  48     /* ------------------------------------------------------------ */
  49     /* ------------------------------------------------------------ */
  50     public class ResourceAsHttpContent implements HttpContent
  51     {
  52         final Resource _resource;
  53         final String _mimeType;
  54         final int _maxBuffer;
  55         final String _etag;
  56
  57         /* ------------------------------------------------------------ */
  58         public ResourceAsHttpContent(final Resource resource, final String mimeType)
  59         {
  60             this(resource,mimeType,-1,false);
  61         }
  62
  63         /* ------------------------------------------------------------ */
  64         public ResourceAsHttpContent(final Resource resource, final String mimeType, int maxBuffer)
  65         {
  66             this(resource,mimeType,maxBuffer,false);
  67         }
  68
  69         /* ------------------------------------------------------------ */
  70         public ResourceAsHttpContent(final Resource resource, final String mimeType, boolean etag)
  71         {
  72             this(resource,mimeType,-1,etag);
  73         }
  74
  75         /* ------------------------------------------------------------ */
  76         public ResourceAsHttpContent(final Resource resource, final String mimeType, int maxBuffer, boolean etag)
  77         {
  78             _resource=resource;
  79             _mimeType=mimeType;
  80             _maxBuffer=maxBuffer;
  81             _etag=etag?resource.getWeakETag():null;
  82         }
  83
  84         /* ------------------------------------------------------------ */
  85         @Override
  86         public String getContentType()
  87         {
  88             return _mimeType;
  89         }
  90
  91         /* ------------------------------------------------------------ */
  92         @Override
  93         public String getLastModified()
  94         {
  95             return null;
  96         }
  97
  98         /* ------------------------------------------------------------ */
  99         @Override
 100         public ByteBuffer getDirectBuffer()
 101         {
 102             if (_resource.length()<=0 || _maxBuffer<_resource.length())
 103                 return null;
 104             try
 105             {
 106                 return BufferUtil.toBuffer(_resource,true);
 107             }
 108             catch(IOException e)
 109             {
 110                 throw new RuntimeException(e);
 111             }
 112         }
 113
 114         /* ------------------------------------------------------------ */
 115         @Override
 116         public String getETag()
 117         {
 118             return _etag;
 119         }
 120
 121         /* ------------------------------------------------------------ */
 122         @Override
 123         public ByteBuffer getIndirectBuffer()
 124         {
 125             if (_resource.length()<=0 || _maxBuffer<_resource.length())
 126                 return null;
 127             try
 128             {
 129                 return BufferUtil.toBuffer(_resource,false);
 130             }
 131             catch(IOException e)
 132             {
 133                 throw new RuntimeException(e);
 134             }
 135         }
 136
 137         /* ------------------------------------------------------------ */
 138         @Override
 139         public long getContentLength()
 140         {
 141             return _resource.length();
 142         }
 143
 144         /* ------------------------------------------------------------ */
 145         @Override
 146         public InputStream getInputStream() throws IOException
 147         {
 148             return _resource.getInputStream();
 149         }
 150
 151         /* ------------------------------------------------------------ */
 152         @Override
 153         public ReadableByteChannel getReadableByteChannel() throws IOException
 154         {
 155             return _resource.getReadableByteChannel();
 156         }
 157
 158         /* ------------------------------------------------------------ */
 159         @Override
 160         public Resource getResource()
 161         {
 162             return _resource;
 163         }
 164
 165         /* ------------------------------------------------------------ */
 166         @Override
 167         public void release()
 168         {
 169             _resource.close();
 170         }
 171     }
 172 }