1 /*
2 * Copyright 2002-2014 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.springframework.http.client;
18
19 import java.io.ByteArrayOutputStream;
20 import java.io.IOException;
21 import java.io.OutputStream;
22
23 import org.springframework.http.HttpHeaders;
24
25 /**
26 * Base implementation of {@link ClientHttpRequest} that buffers output
27 * in a byte array before sending it over the wire.
28 *
29 * @author Arjen Poutsma
30 * @since 3.0.6
31 */
32 abstract class AbstractBufferingClientHttpRequest extends AbstractClientHttpRequest {
33
34 private ByteArrayOutputStream bufferedOutput = new ByteArrayOutputStream(1024);
35
36
37 @Override
38 protected OutputStream getBodyInternal(HttpHeaders headers) throws IOException {
39 return this.bufferedOutput;
40 }
41
42 @Override
43 protected ClientHttpResponse executeInternal(HttpHeaders headers) throws IOException {
44 byte[] bytes = this.bufferedOutput.toByteArray();
45 if (headers.getContentLength() == -1) {
46 headers.setContentLength(bytes.length);
47 }
48 ClientHttpResponse result = executeInternal(headers, bytes);
49 this.bufferedOutput = null;
50 return result;
51 }
52
53 /**
54 * Abstract template method that writes the given headers and content to the HTTP request.
55 * @param headers the HTTP headers
56 * @param bufferedOutput the body content
57 * @return the response object for the executed request
58 */
59 protected abstract ClientHttpResponse executeInternal(HttpHeaders headers, byte[] bufferedOutput)
60 throws IOException;
61
62
63 }