io.milton.httpclient.zsyncclient.HttpRangeLoader Maven / Gradle / Ivy
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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.
*/
package io.milton.httpclient.zsyncclient;
import io.milton.http.Range;
import io.milton.httpclient.File;
import io.milton.httpclient.HttpException;
import io.milton.httpclient.ProgressListener;
import io.milton.httpclient.Utils.CancelledException;
import java.io.ByteArrayOutputStream;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author HP
*/
public class HttpRangeLoader implements RangeLoader {
private static final Logger log = LoggerFactory.getLogger(HttpRangeLoader.class);
private final File file;
private final ProgressListener listener;
private long numBytes;
public HttpRangeLoader(File file, final ProgressListener listener) {
this.file = file;
this.listener = listener;
}
@Override
public byte[] get(List rangeList) {
log.info("get: rangelist: " + rangeList.size());
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
file.download(out, listener, rangeList);
} catch (HttpException ex) {
} catch (CancelledException ex) {
throw new RuntimeException("Cancelled, which is odd because no progress listener was provided");
}
byte[] bytes = out.toByteArray();
int expectedLength = calcExpectedLength(rangeList);
// if( expectedLength != bytes.length) {
// log.warn("Got an unexpected data size!!");
// }
numBytes += bytes.length;
return bytes;
}
public static int calcExpectedLength(List rangeList) {
int l = 0;
for (Range r : rangeList) {
l += (r.getFinish() - r.getStart());
}
return l;
}
public long getBytesDownloaded() {
return numBytes;
}
}