1/*
2 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. 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 Oracle 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/*
33 * This source code is provided to illustrate the usage of a given feature
34 * or technique and has been deliberately simplified. Additional steps
35 * required for a production-quality application, such as security checks,
36 * input validation and proper error handling, might not be present in
37 * this sample code.
38 */
39
40
41import java.io.*;
42import java.nio.*;
43import java.nio.charset.*;
44
45/**
46 * An object used for sending Content to the requestor.
47 *
48 * @author Mark Reinhold
49 * @author Brad R. Wetmore
50 */
51class Reply implements Sendable {
52
53    /**
54     * A helper class which define the HTTP response codes
55     */
56    static class Code {
57
58        private int number;
59        private String reason;
60        private Code(int i, String r) { number = i; reason = r; }
61        public String toString() { return number + " " + reason; }
62
63        static Code OK = new Code(200, "OK");
64        static Code BAD_REQUEST = new Code(400, "Bad Request");
65        static Code NOT_FOUND = new Code(404, "Not Found");
66        static Code METHOD_NOT_ALLOWED = new Code(405, "Method Not Allowed");
67
68    }
69
70    private Code code;
71    private Content content;
72    private boolean headersOnly;
73
74    Reply(Code rc, Content c) {
75        this(rc, c, null);
76    }
77
78    Reply(Code rc, Content c, Request.Action head) {
79        code = rc;
80        content = c;
81        headersOnly = (head == Request.Action.HEAD);
82    }
83
84    private static String CRLF = "\r\n";
85    private static Charset ascii = Charset.forName("US-ASCII");
86
87    private ByteBuffer hbb = null;
88
89    private ByteBuffer headers() {
90        CharBuffer cb = CharBuffer.allocate(1024);
91        for (;;) {
92            try {
93                cb.put("HTTP/1.0 ").put(code.toString()).put(CRLF);
94                cb.put("Server: niossl/0.1").put(CRLF);
95                cb.put("Content-type: ").put(content.type()).put(CRLF);
96                cb.put("Content-length: ")
97                    .put(Long.toString(content.length())).put(CRLF);
98                cb.put(CRLF);
99                break;
100            } catch (BufferOverflowException x) {
101                assert(cb.capacity() < (1 << 16));
102                cb = CharBuffer.allocate(cb.capacity() * 2);
103                continue;
104            }
105        }
106        cb.flip();
107        return ascii.encode(cb);
108    }
109
110    public void prepare() throws IOException {
111        content.prepare();
112        hbb = headers();
113    }
114
115    public boolean send(ChannelIO cio) throws IOException {
116
117        if (hbb == null)
118            throw new IllegalStateException();
119
120        if (hbb.hasRemaining()) {
121            if (cio.write(hbb) <= 0)
122                return true;
123        }
124
125        if (!headersOnly) {
126            if (content.send(cio))
127                return true;
128        }
129
130        if (!cio.dataFlush())
131            return true;
132
133        return false;
134    }
135
136    public void release() throws IOException {
137        content.release();
138    }
139}
140