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.http.localserver;
29
30 import java.io.IOException;
31 import java.util.Locale;
32
33 import org.apache.http.HttpEntity;
34 import org.apache.http.HttpEntityEnclosingRequest;
35 import org.apache.http.HttpException;
36 import org.apache.http.HttpRequest;
37 import org.apache.http.HttpResponse;
38 import org.apache.http.MethodNotSupportedException;
39 import org.apache.http.nio.entity.NByteArrayEntity;
40 import org.apache.http.protocol.HttpContext;
41 import org.apache.http.protocol.HttpRequestHandler;
42 import org.apache.http.util.EntityUtils;
43
44 /**
45 * A handler that echos the incoming request entity.
46 */
47 public class EchoHandler
48 implements HttpRequestHandler {
49
50 // public default constructor
51
52 /**
53 * Handles a request by echoing the incoming request entity.
54 * If there is no request entity, an empty document is returned.
55 *
56 * @param request the request
57 * @param response the response
58 * @param context the context
59 *
60 * @throws HttpException in case of a problem
61 * @throws IOException in case of an IO problem
62 */
63 @Override
64 public void handle(final HttpRequest request,
65 final HttpResponse response,
66 final HttpContext context)
67 throws HttpException, IOException {
68
69 final String method = request.getRequestLine().getMethod().toUpperCase(Locale.ROOT);
70 if (!"GET".equals(method) &&
71 !"POST".equals(method) &&
72 !"PUT".equals(method)
73 ) {
74 throw new MethodNotSupportedException
75 (method + " not supported by " + getClass().getName());
76 }
77
78 HttpEntity entity = null;
79 if (request instanceof HttpEntityEnclosingRequest) {
80 entity = ((HttpEntityEnclosingRequest)request).getEntity();
81 }
82
83 // For some reason, just putting the incoming entity into
84 // the response will not work. We have to buffer the message.
85 final byte[] data;
86 if (entity == null) {
87 data = new byte [0];
88 } else {
89 data = EntityUtils.toByteArray(entity);
90 }
91
92 final NByteArrayEntity bae = new NByteArrayEntity(data);
93 if (entity != null) {
94 bae.setContentType(entity.getContentType());
95 }
96 response.setEntity(bae);
97 }
98
99 }