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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 net.yacy.cora.protocol.http;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.http.entity.AbstractHttpEntity;
/**
* This is InputStreamEntity from httpcore-4.1
* In httpcore-4.1.1 InputStreamEntity finally closes its InputStream.
* In general that is a good idea - but while in use of our proxy doing a POST,
* this also closes the server-socket an the proxy-client doesn't get anything.
*/
public class NonClosingInputStreamEntity extends AbstractHttpEntity {
private final static int BUFFER_SIZE = 2048;
private final InputStream content;
private final long length;
public NonClosingInputStreamEntity(final InputStream instream, final long length) {
super();
if (instream == null) {
throw new IllegalArgumentException("Source input stream may not be null");
}
this.content = instream;
this.length = length;
}
@Override
public boolean isRepeatable() {
return false;
}
@Override
public long getContentLength() {
return this.length;
}
@Override
public InputStream getContent() throws IOException {
return this.content;
}
@Override
public void writeTo(final OutputStream outstream) throws IOException {
if (outstream == null) {
throw new IllegalArgumentException("Output stream may not be null");
}
final InputStream instream = this.content;
final byte[] buffer = new byte[BUFFER_SIZE];
int l;
if (this.length < 0) {
// consume until EOF
while ((l = instream.read(buffer)) != -1) {
outstream.write(buffer, 0, l);
}
} else {
// consume no more than length
long remaining = this.length;
while (remaining > 0) {
l = instream.read(buffer, 0, (int)Math.min(BUFFER_SIZE, remaining));
if (l == -1) {
break;
}
outstream.write(buffer, 0, l);
remaining -= l;
}
}
}
@Override
public boolean isStreaming() {
return true;
}
/**
* @deprecated Either use {@link #getContent()} and call {@link java.io.InputStream#close()} on that;
* otherwise call {@link #writeTo(OutputStream)} which is required to free the resources.
*/
@Override
@Deprecated
public void consumeContent() throws IOException {
// If the input stream is from a connection, closing it will read to
// the end of the content. Otherwise, we don't care what it does.
this.content.close();
}
}
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