J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * - Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * - Neither the name of Sun Microsystems nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived |
| 17 | * from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | import java.io.*; |
| 33 | import java.net.*; |
| 34 | import java.nio.channels.*; |
| 35 | import java.nio.charset.*; |
| 36 | |
| 37 | /** |
| 38 | * A Content type that provides for transferring files. |
| 39 | * |
| 40 | * @author Mark Reinhold |
| 41 | * @author Brad R. Wetmore |
| 42 | */ |
| 43 | class FileContent implements Content { |
| 44 | |
| 45 | private static File ROOT = new File("root"); |
| 46 | |
| 47 | private File fn; |
| 48 | |
| 49 | FileContent(URI uri) { |
| 50 | fn = new File(ROOT, |
| 51 | uri.getPath() |
| 52 | .replace('/', |
| 53 | File.separatorChar)); |
| 54 | } |
| 55 | |
| 56 | private String type = null; |
| 57 | |
| 58 | public String type() { |
| 59 | if (type != null) |
| 60 | return type; |
| 61 | String nm = fn.getName(); |
| 62 | if (nm.endsWith(".html")) |
| 63 | type = "text/html; charset=iso-8859-1"; |
| 64 | else if ((nm.indexOf('.') < 0) || nm.endsWith(".txt")) |
| 65 | type = "text/plain; charset=iso-8859-1"; |
| 66 | else |
| 67 | type = "application/octet-stream"; |
| 68 | return type; |
| 69 | } |
| 70 | |
| 71 | private FileChannel fc = null; |
| 72 | private long length = -1; |
| 73 | private long position = -1; // NB only; >= 0 if transferring |
| 74 | |
| 75 | public long length() { |
| 76 | return length; |
| 77 | } |
| 78 | |
| 79 | public void prepare() throws IOException { |
| 80 | if (fc == null) |
| 81 | fc = new RandomAccessFile(fn, "r").getChannel(); |
| 82 | length = fc.size(); |
| 83 | position = 0; // NB only |
| 84 | } |
| 85 | |
| 86 | public boolean send(ChannelIO cio) throws IOException { |
| 87 | if (fc == null) |
| 88 | throw new IllegalStateException(); |
| 89 | if (position < 0) // NB only |
| 90 | throw new IllegalStateException(); |
| 91 | |
| 92 | /* |
| 93 | * Short-circuit if we're already done. |
| 94 | */ |
| 95 | if (position >= length) { |
| 96 | return false; |
| 97 | } |
| 98 | |
| 99 | position += cio.transferTo(fc, position, length - position); |
| 100 | return (position < length); |
| 101 | } |
| 102 | |
| 103 | public void release() throws IOException { |
| 104 | if (fc != null) { |
| 105 | fc.close(); |
| 106 | fc = null; |
| 107 | } |
| 108 | } |
| 109 | } |