1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.hc.client5.testing.classic;
29
30 import java.io.IOException;
31 import java.util.Locale;
32
33 import org.apache.hc.core5.http.ClassicHttpRequest;
34 import org.apache.hc.core5.http.ClassicHttpResponse;
35 import org.apache.hc.core5.http.ContentType;
36 import org.apache.hc.core5.http.HttpEntity;
37 import org.apache.hc.core5.http.HttpException;
38 import org.apache.hc.core5.http.HttpStatus;
39 import org.apache.hc.core5.http.MethodNotSupportedException;
40 import org.apache.hc.core5.http.io.HttpRequestHandler;
41 import org.apache.hc.core5.http.io.entity.ByteArrayEntity;
42 import org.apache.hc.core5.http.io.entity.EntityUtils;
43 import org.apache.hc.core5.http.protocol.HttpContext;
44
45 /**
46 * A handler that echos the incoming request entity.
47 */
48 public class EchoHandler implements HttpRequestHandler {
49
50 /**
51 * Handles a request by echoing the incoming request entity.
52 * If there is no request entity, an empty document is returned.
53 *
54 * @param request the request
55 * @param response the response
56 * @param context the context
57 *
58 * @throws HttpException in case of a problem
59 * @throws IOException in case of an IO problem
60 */
61 @Override
62 public void handle(final ClassicHttpRequest request,
63 final ClassicHttpResponse response,
64 final HttpContext context)
65 throws HttpException, IOException {
66
67 final String method = request.getMethod().toUpperCase(Locale.ROOT);
68 if (!"GET".equals(method) &&
69 !"HEAD".equals(method) &&
70 !"POST".equals(method) &&
71 !"PUT".equals(method)) {
72 throw new MethodNotSupportedException(method + " not supported by " + getClass().getName());
73 }
74
75 HttpEntity entity = request.getEntity();
76
77 // For some reason, just putting the incoming entity into
78 // the response will not work. We have to buffer the message.
79 final byte[] data;
80 final ContentType contentType;
81 if (entity == null) {
82 data = new byte [0];
83 contentType = null;
84 } else {
85 data = EntityUtils.toByteArray(entity);
86 final String contentTypeStr = entity.getContentType();
87 contentType = contentTypeStr == null ? null : ContentType.parse(contentTypeStr);
88 }
89
90 entity = new ByteArrayEntity(data, contentType);
91
92 response.setCode(HttpStatus.SC_OK);
93 response.setEntity(entity);
94 }
95
96 }