package com.coderising.download.impl;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Arrays;
import com.coderising.download.api.Connection;
public class ConnectionImpl implements Connection{
private URL url;
public ConnectionImpl(String _url) {
try {
url = new URL(_url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
@Override
public byte[] read(int startPos, int endPos) throws IOException {
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestProperty("Range", "bytes=" + startPos + "-" + endPos);
InputStream in = connection.getInputStream();
byte[] buffer = new byte[1024];
int length = endPos - startPos + 1;
ByteArrayOutputStream out = new ByteArrayOutputStream();
while(out.size() < length) {
int len = in.read(buffer);
if(len < 0) {
break;
}
out.write(buffer, 0, len);
}
if(out.size() > length) {
byte[] file = out.toByteArray();
return Arrays.copyOf(file, length);
}
return out.toByteArray();
}
@Override
public int getContentLength() {
URLConnection con;
try {
con = url.openConnection();
return con.getContentLength();
} catch (IOException e) {
e.printStackTrace();
}
return -1;
}
@Override
public void close() {
}
}