Source code: org/apache/http/protocol/RequestContent.java
1 /*
2 * $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpcore/tags/4.0-alpha2/src/java/org/apache/http/protocol/RequestContent.java $
3 * $Revision: 408172 $
4 * $Date: 2006-05-21 16:06:29 +0200 (Sun, 21 May 2006) $
5 *
6 * ====================================================================
7 *
8 * Copyright 1999-2006 The Apache Software Foundation
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 * ====================================================================
22 *
23 * This software consists of voluntary contributions made by many
24 * individuals on behalf of the Apache Software Foundation. For more
25 * information on the Apache Software Foundation, please see
26 * <http://www.apache.org/>.
27 *
28 */
29
30 package org.apache.http.protocol;
31
32 import java.io.IOException;
33
34 import org.apache.http.HttpEntity;
35 import org.apache.http.HttpEntityEnclosingRequest;
36 import org.apache.http.HttpException;
37 import org.apache.http.HttpRequest;
38 import org.apache.http.HttpRequestInterceptor;
39 import org.apache.http.HttpVersion;
40 import org.apache.http.ProtocolException;
41
42 /**
43 * A request interceptor that decides about the transport encoding.
44 *
45 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
46 *
47 * @version $Revision: 408172 $
48 *
49 * @since 4.0
50 */
51 public class RequestContent implements HttpRequestInterceptor {
52
53 public RequestContent() {
54 super();
55 }
56
57 public void process(final HttpRequest request, final HttpContext context)
58 throws HttpException, IOException {
59 if (request == null) {
60 throw new IllegalArgumentException("HTTP request may not be null");
61 }
62 if (request instanceof HttpEntityEnclosingRequest) {
63 if (request.containsHeader(HTTP.TRANSFER_ENCODING)) {
64 throw new ProtocolException("Transfer-encoding header already present");
65 }
66 if (request.containsHeader(HTTP.CONTENT_LEN)) {
67 throw new ProtocolException("Content-Length header already present");
68 }
69 HttpVersion ver = request.getRequestLine().getHttpVersion();
70 HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity();
71 if (entity == null) {
72 request.setHeader(new GeneratedHeader(HTTP.CONTENT_LEN, "0"));
73 return;
74 }
75 // Must specify a transfer encoding or a content length
76 if (entity.isChunked() || entity.getContentLength() < 0) {
77 if (ver.lessEquals(HttpVersion.HTTP_1_0)) {
78 throw new ProtocolException(
79 "Chunked transfer encoding not allowed for " + ver);
80 }
81 request.addHeader(new GeneratedHeader(HTTP.TRANSFER_ENCODING,
82 HTTP.CHUNK_CODING));
83 } else {
84 request.addHeader(new GeneratedHeader(HTTP.CONTENT_LEN,
85 Long.toString(entity.getContentLength())));
86 }
87 // Specify a content type if known
88 if (entity.getContentType() != null) {
89 request.setHeader(entity.getContentType());
90 }
91 // Specify a content encoding if known
92 if (entity.getContentEncoding() != null) {
93 request.setHeader(entity.getContentEncoding());
94 }
95 }
96 }
97
98 }