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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.client.methods;
import java.net.URI;
import java.util.HashSet;
import java.util.Set;
import ch.boye.httpclientandroidlib.Header;
import ch.boye.httpclientandroidlib.HeaderElement;
import ch.boye.httpclientandroidlib.HeaderIterator;
import ch.boye.httpclientandroidlib.HttpResponse;
import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
import ch.boye.httpclientandroidlib.util.Args;
/**
* HTTP OPTIONS method.
* <p>
* The HTTP OPTIONS method is defined in section 9.2 of
* <a href="http://www.ietf.org/rfc/rfc2616.txt">RFC2616</a>:
* <blockquote>
* The OPTIONS method represents a request for information about the
* communication options available on the request/response chain
* identified by the Request-URI. This method allows the client to
* determine the options and/or requirements associated with a resource,
* or the capabilities of a server, without implying a resource action
* or initiating a resource retrieval.
* </blockquote>
* </p>
*
* @since 4.0
*/
@NotThreadSafe
public class HttpOptions extends HttpRequestBase {
public final static String METHOD_NAME = "OPTIONS";
public HttpOptions() {
super();
}
public HttpOptions(final URI uri) {
super();
setURI(uri);
}
/**
* @throws IllegalArgumentException if the uri is invalid.
*/
public HttpOptions(final String uri) {
super();
setURI(URI.create(uri));
}
@Override
public String getMethod() {
return METHOD_NAME;
}
public Set<String> getAllowedMethods(final HttpResponse response) {
Args.notNull(response, "HTTP response");
final HeaderIterator it = response.headerIterator("Allow");
final Set<String> methods = new HashSet<String>();
while (it.hasNext()) {
final Header header = it.nextHeader();
final HeaderElement[] elements = header.getElements();
for (final HeaderElement element : elements) {
methods.add(element.getName());
}
}
return methods;
}
}
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