Home | History | Annotate | Download | only in server 
      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 
     41 import java.io.*;
     42 import java.nio.*;
     43 import java.nio.charset.*;
     44 
     45 /**
     46  * A Content type that provides for transferring Strings.
     47  *
     48  * @author Mark Reinhold
     49  * @author Brad R. Wetmore
     50  */
     51 class StringContent implements Content {
     52 
     53     private static Charset ascii = Charset.forName("US-ASCII");
     54 
     55     private String type;                // MIME type
     56     private String content;
     57 
     58     StringContent(CharSequence c, String t) {
     59         content = c.toString();
     60         if (!content.endsWith("\n"))
     61             content += "\n";
     62         type = t + "; charset=iso-8859-1";
     63     }
     64 
     65     StringContent(CharSequence c) {
     66         this(c, "text/plain");
     67     }
     68 
     69     StringContent(Exception x) {
     70         StringWriter sw = new StringWriter();
     71         x.printStackTrace(new PrintWriter(sw));
     72         type = "text/plain; charset=iso-8859-1";
     73         content = sw.toString();
     74     }
     75 
     76     public String type() {
     77         return type;
     78     }
     79 
     80     private ByteBuffer bb = null;
     81 
     82     private void encode() {
     83         if (bb == null)
     84             bb = ascii.encode(CharBuffer.wrap(content));
     85     }
     86 
     87     public long length() {
     88         encode();
     89         return bb.remaining();
     90     }
     91 
     92     public void prepare() {
     93         encode();
     94         bb.rewind();
     95     }
     96 
     97     public boolean send(ChannelIO cio) throws IOException {
     98         if (bb == null)
     99             throw new IllegalStateException();
    100         cio.write(bb);
    101 
    102         return bb.hasRemaining();
    103     }
    104 
    105     public void release() throws IOException {
    106     }
    107 }
    108