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