package com.coderising.download.impl;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import com.coderising.download.api.Connection;
public class ConnectionImpl implements Connection{
private URLConnection urlConnection;
private URL url;
public ConnectionImpl(String url){
try {
this.url = new URL(url);
urlConnection = this.url.openConnection();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public byte[] read(int startPos, int endPos) throws IOException {
URLConnection uc = url.openConnection();
uc.setRequestProperty("Range", "bytes=" + startPos + "-" + endPos);
InputStream inputStream = uc.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length = 0;
while((length = inputStream.read(buffer)) != -1){
baos.write(buffer, 0, length);
}
inputStream.close();
baos.close();
return baos.toByteArray();
}
@Override
public int getContentLength() {
return urlConnection.getContentLength();
}
@Override
public void close() {
}
}