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72 lines
2.7 KiB
Java
72 lines
2.7 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.impl.client;
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import ch.boye.httpclientandroidlib.annotation.Immutable;
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import ch.boye.httpclientandroidlib.HeaderElement;
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import ch.boye.httpclientandroidlib.HeaderElementIterator;
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import ch.boye.httpclientandroidlib.HttpResponse;
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import ch.boye.httpclientandroidlib.conn.ConnectionKeepAliveStrategy;
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import ch.boye.httpclientandroidlib.message.BasicHeaderElementIterator;
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import ch.boye.httpclientandroidlib.protocol.HTTP;
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import ch.boye.httpclientandroidlib.protocol.HttpContext;
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/**
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* Default implementation of a strategy deciding duration
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* that a connection can remain idle.
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*
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* The default implementation looks solely at the 'Keep-Alive'
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* header's timeout token.
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*
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* @since 4.0
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*/
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@Immutable
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public class DefaultConnectionKeepAliveStrategy implements ConnectionKeepAliveStrategy {
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public long getKeepAliveDuration(HttpResponse response, HttpContext context) {
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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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HeaderElementIterator it = new BasicHeaderElementIterator(
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response.headerIterator(HTTP.CONN_KEEP_ALIVE));
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while (it.hasNext()) {
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HeaderElement he = it.nextElement();
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String param = he.getName();
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String value = he.getValue();
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if (value != null && param.equalsIgnoreCase("timeout")) {
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try {
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return Long.parseLong(value) * 1000;
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} catch(NumberFormatException ignore) {
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}
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}
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}
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return -1;
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}
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}
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