lib/jetty/org/eclipse/jetty/util/MultiPartWriter.java

   1 //
   2 //  ========================================================================
   3 //  Copyright (c) 1995-2016 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.util;
  20
  21 import java.io.FilterWriter;
  22 import java.io.IOException;
  23 import java.io.Writer;
  24
  25
  26 /* ================================================================ */
  27 /** Handle a multipart MIME response.
  28  *
  29  *
  30  *
  31 */
  32 public class MultiPartWriter extends FilterWriter
  33 {
  34     /* ------------------------------------------------------------ */
  35     private final static String __CRLF="\015\012";
  36     private final static String __DASHDASH="--";
  37
  38     public static final String MULTIPART_MIXED=MultiPartOutputStream.MULTIPART_MIXED;
  39     public static final String MULTIPART_X_MIXED_REPLACE=MultiPartOutputStream.MULTIPART_X_MIXED_REPLACE;
  40
  41     /* ------------------------------------------------------------ */
  42     private String boundary;
  43
  44     /* ------------------------------------------------------------ */
  45     private boolean inPart=false;
  46
  47     /* ------------------------------------------------------------ */
  48     public MultiPartWriter(Writer out)
  49          throws IOException
  50     {
  51         super(out);
  52         boundary = "jetty"+System.identityHashCode(this)+
  53         Long.toString(System.currentTimeMillis(),36);
  54
  55         inPart=false;
  56     }
  57
  58     /* ------------------------------------------------------------ */
  59     /** End the current part.
  60      * @exception IOException IOException
  61      */
  62     @Override
  63     public void close()
  64          throws IOException
  65     {
  66         try
  67         {
  68             if (inPart)
  69                 out.write(__CRLF);
  70             out.write(__DASHDASH);
  71             out.write(boundary);
  72             out.write(__DASHDASH);
  73             out.write(__CRLF);
  74             inPart=false;
  75         }
  76         finally
  77         {
  78             super.close();
  79         }
  80     }
  81
  82     /* ------------------------------------------------------------ */
  83     public String getBoundary()
  84     {
  85         return boundary;
  86     }
  87
  88     /* ------------------------------------------------------------ */
  89     /** Start creation of the next Content.
  90      */
  91     public void startPart(String contentType)
  92          throws IOException
  93     {
  94         if (inPart)
  95             out.write(__CRLF);
  96         out.write(__DASHDASH);
  97         out.write(boundary);
  98         out.write(__CRLF);
  99         out.write("Content-Type: ");
 100         out.write(contentType);
 101         out.write(__CRLF);
 102         out.write(__CRLF);
 103         inPart=true;
 104     }
 105
 106     /* ------------------------------------------------------------ */
 107     /** end creation of the next Content.
 108      */
 109     public void endPart()
 110          throws IOException
 111     {
 112         if (inPart)
 113             out.write(__CRLF);
 114         inPart=false;
 115     }
 116
 117     /* ------------------------------------------------------------ */
 118     /** Start creation of the next Content.
 119      */
 120     public void startPart(String contentType, String[] headers)
 121          throws IOException
 122     {
 123         if (inPart)
 124             out.write(__CRLF);
 125         out.write(__DASHDASH);
 126         out.write(boundary);
 127         out.write(__CRLF);
 128         out.write("Content-Type: ");
 129         out.write(contentType);
 130         out.write(__CRLF);
 131         for (int i=0;headers!=null && i<headers.length;i++)
 132         {
 133             out.write(headers[i]);
 134             out.write(__CRLF);
 135         }
 136         out.write(__CRLF);
 137         inPart=true;
 138     }
 139
 140 }
 141
 142
 143
 144