package com.coderising.download.impl;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import com.coderising.download.api.Connection;
public class ConnectionImpl implements Connection{
private HttpURLConnection connection;
public ConnectionImpl(HttpURLConnection connection) {
this.connection = connection;
}
@Override
public byte[] read(int startPos, int endPos) throws IOException {
connection.setRequestProperty("Range", "bytes="+startPos+"-"+endPos);
InputStream inputStream = new BufferedInputStream(connection.getInputStream());
int totalLen = endPos - startPos;
System.out.println(Thread.currentThread().getName()+":"+totalLen);
int pertimeLen = 1;
int arrayIndex = 0;
byte[] b = new byte[totalLen];
try {
while (arrayIndex<totalLen && inputStream.read(b, arrayIndex, pertimeLen)!=-1) {
arrayIndex += pertimeLen;
}
} catch (Exception e) {
e.printStackTrace();
}
return b;
}
@Override
public int getContentLength() {
return connection.getContentLength();
}
@Override
public void close() {
connection.disconnect();
}
}