package com.coderising.download.impl;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import com.coderising.download.api.Connection;
import com.coderising.download.api.ConnectionException;
public class ConnectionImpl implements Connection{
private HttpURLConnection conn;
@Override
public byte[] read(int startPos, int endPos) throws IOException {
int len = 0;
InputStream in = null;
ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
try {
conn.setRequestProperty("Range", "bytes=" + startPos + "-"
+ (endPos));
in = conn.getInputStream();
while (startPos < endPos && (len = in.read(buf)) != -1) {
bytestream.write(buf, 0, len);
}
} catch (Exception e) {
new ConnectionException(e.getMessage());
} finally {
if (in != null) {
in.close();
}
}
byte data[] = bytestream.toByteArray();
System.out.println("byte size():"+bytestream.size());
bytestream.close();
return data;
}
@Override
public int getContentLength() {
return (int) conn.getContentLengthLong();
}
@Override
public void close() {
if(conn!=null){
conn.disconnect();
}
}
public InputStream getInputStream(){
InputStream ins = null;
try {
ins = conn.getInputStream();
} catch (IOException e) {
e.printStackTrace();
}
return ins;
}
@Override
public void setConnection(HttpURLConnection urlCn) {
conn = urlCn;
}
}