/*
* ====================================================================
* 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 org.apache.http.impl.entity;
import org.apache.http.HttpException;
import org.apache.http.HttpMessage;
import org.apache.http.ProtocolException;
import org.apache.http.annotation.Immutable;
import org.apache.http.entity.ContentLengthStrategy;
/**
* Decorator for {@link ContentLengthStrategy} implementations that disallows the use of
* identity transfer encoding.
*
* @since 4.2
*/
@Immutable
public class DisallowIdentityContentLengthStrategy implements ContentLengthStrategy {
public static final DisallowIdentityContentLengthStrategy INSTANCE =
new DisallowIdentityContentLengthStrategy(new LaxContentLengthStrategy(0));
private final ContentLengthStrategy contentLengthStrategy;
public DisallowIdentityContentLengthStrategy(final ContentLengthStrategy contentLengthStrategy) {
super();
this.contentLengthStrategy = contentLengthStrategy;
}
@Override
public long determineLength(final HttpMessage message) throws HttpException {
final long result = this.contentLengthStrategy.determineLength(message);
if (result == ContentLengthStrategy.IDENTITY) {
throw new ProtocolException("Identity transfer encoding cannot be used");
}
return result;
}
}