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.client.api;
20
21 import java.nio.ByteBuffer;
22
23 /**
24 * {@link ContentProvider} provides a source of request content.
25 * <p/>
26 * Implementations should return an {@link Iterator} over the request content.
27 * If the request content comes from a source that needs to be closed (for
28 * example, an {@link InputStream}), then the iterator implementation class
29 * must implement {@link Closeable} and will be closed when the request is
30 * completed (either successfully or failed).
31 * <p/>
32 * Applications should rely on utility classes such as {@link ByteBufferContentProvider}
33 * or {@link PathContentProvider}.
34 */
35 public interface ContentProvider extends Iterable<ByteBuffer>
36 {
37 /**
38 * @return the content length, if known, or -1 if the content length is unknown
39 */
40 long getLength();
41
42 /**
43 * An extension of {@link ContentProvider} that provides a content type string
44 * to be used as a {@code Content-Type} HTTP header in requests.
45 */
46 public interface Typed extends ContentProvider
47 {
48 /**
49 * @return the content type string such as "application/octet-stream" or
50 * "application/json;charset=UTF8", or null if no content type must be set
51 */
52 public String getContentType();
53 }
54 }