1 /*
2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/client/methods/HttpOptions.java $
3  * $Revision: 664505 $
4  * $Date: 2008-06-08 06:21:20 -0700 (Sun, 08 Jun 2008) $
5  *
6  * ====================================================================
7  * Licensed to the Apache Software Foundation (ASF) under one
8  * or more contributor license agreements.  See the NOTICE file
9  * distributed with this work for additional information
10  * regarding copyright ownership.  The ASF licenses this file
11  * to you under the Apache License, Version 2.0 (the
12  * "License"); you may not use this file except in compliance
13  * with the License.  You may obtain a copy of the License at
14  *
15  *   http://www.apache.org/licenses/LICENSE-2.0
16  *
17  * Unless required by applicable law or agreed to in writing,
18  * software distributed under the License is distributed on an
19  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20  * KIND, either express or implied.  See the License for the
21  * specific language governing permissions and limitations
22  * under the License.
23  * ====================================================================
24  *
25  * This software consists of voluntary contributions made by many
26  * individuals on behalf of the Apache Software Foundation.  For more
27  * information on the Apache Software Foundation, please see
28  * <http://www.apache.org/>.
29  *
30  */
31 
32 package org.apache.http.client.methods;
33 
34 import java.net.URI;
35 import java.util.HashSet;
36 import java.util.Set;
37 
38 import org.apache.http.Header;
39 import org.apache.http.HeaderElement;
40 import org.apache.http.HeaderIterator;
41 import org.apache.http.HttpResponse;
42 
43 /**
44  * HTTP OPTIONS method.
45  * <p>
46  * The HTTP OPTIONS method is defined in section 9.2 of
47  * <a href="http://www.ietf.org/rfc/rfc2616.txt">RFC2616</a>:
48  * <blockquote>
49  *  The OPTIONS method represents a request for information about the
50  *  communication options available on the request/response chain
51  *  identified by the Request-URI. This method allows the client to
52  *  determine the options and/or requirements associated with a resource,
53  *  or the capabilities of a server, without implying a resource action
54  *  or initiating a resource retrieval.
55  * </blockquote>
56  * </p>
57  *
58  * @version $Revision: 664505 $
59  *
60  * @since 4.0
61  *
62  * @deprecated Please use {@link java.net.URL#openConnection} instead.
63  *     Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
64  *     for further details.
65  */
66 @Deprecated
67 public class HttpOptions extends HttpRequestBase {
68 
69     public final static String METHOD_NAME = "OPTIONS";
70 
HttpOptions()71     public HttpOptions() {
72         super();
73     }
74 
HttpOptions(final URI uri)75     public HttpOptions(final URI uri) {
76         super();
77         setURI(uri);
78     }
79 
80     /**
81      * @throws IllegalArgumentException if the uri is invalid.
82      */
HttpOptions(final String uri)83     public HttpOptions(final String uri) {
84         super();
85         setURI(URI.create(uri));
86     }
87 
88     @Override
getMethod()89     public String getMethod() {
90         return METHOD_NAME;
91     }
92 
getAllowedMethods(final HttpResponse response)93     public Set<String> getAllowedMethods(final HttpResponse response) {
94         if (response == null) {
95             throw new IllegalArgumentException("HTTP response may not be null");
96         }
97 
98         HeaderIterator it = response.headerIterator("Allow");
99         Set<String> methods = new HashSet<String>();
100         while (it.hasNext()) {
101             Header header = it.nextHeader();
102             HeaderElement[] elements = header.getElements();
103             for (HeaderElement element : elements) {
104                 methods.add(element.getName());
105             }
106         }
107         return methods;
108     }
109 
110 }
111