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.HttpStatus;
39 import org.apache.http.MethodNotSupportedException;
40 import org.apache.http.entity.ByteArrayEntity;
41 import org.apache.http.protocol.HttpContext;
42 import org.apache.http.protocol.HttpRequestHandler;
43 import org.apache.http.util.EntityUtils;
44
45
46
47 /**
48 * A handler that echos the incoming request entity.
49 *
50 *
51 *
52 * <!-- empty lines to avoid 'svn diff' problems -->
53 */
54 public class EchoHandler
55 implements HttpRequestHandler {
56
57 // public default constructor
58
59 /**
60 * Handles a request by echoing the incoming request entity.
61 * If there is no request entity, an empty document is returned.
62 *
63 * @param request the request
64 * @param response the response
65 * @param context the context
66 *
67 * @throws HttpException in case of a problem
68 * @throws IOException in case of an IO problem
69 */
70 @Override
71 public void handle(final HttpRequest request,
72 final HttpResponse response,
73 final HttpContext context)
74 throws HttpException, IOException {
75
76 final String method = request.getRequestLine().getMethod().toUpperCase(Locale.ROOT);
77 if (!"GET".equals(method) &&
78 !"POST".equals(method) &&
79 !"PUT".equals(method)
80 ) {
81 throw new MethodNotSupportedException
82 (method + " not supported by " + getClass().getName());
83 }
84
85 HttpEntity entity = null;
86 if (request instanceof HttpEntityEnclosingRequest) {
87 entity = ((HttpEntityEnclosingRequest)request).getEntity();
88 }
89
90 // For some reason, just putting the incoming entity into
91 // the response will not work. We have to buffer the message.
92 final byte[] data;
93 if (entity == null) {
94 data = new byte [0];
95 } else {
96 data = EntityUtils.toByteArray(entity);
97 }
98
99 final ByteArrayEntity bae = new ByteArrayEntity(data);
100 if (entity != null) {
101 bae.setContentType(entity.getContentType());
102 }
103 entity = bae;
104
105 response.setStatusCode(HttpStatus.SC_OK);
106 response.setEntity(entity);
107
108 } // handle
109
110
111 } // class EchoHandler