package dk.thoerup.traininfo.util;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;

public class DownloadUtil {

	public static String getContent(String uri, int timeout, String encoding) throws Exception {
		char cbuffer[] = new char[256];
		StringBuffer buffer = new StringBuffer(128000);
		
		Date start = new Date();
		URL url = new URL(uri);
		URLConnection connection = url.openConnection();
		connection.setConnectTimeout(20000);
		InputStream stream = connection.getInputStream();
		
		InputStreamReader reader = new InputStreamReader(stream, encoding);
		int count;
		while ( (count = reader.read(cbuffer)) != -1) {
			buffer.append(cbuffer, 0, count);
			
			Date now = new Date();
			if (  (now.getTime()-start.getTime()) > timeout)
				throw new Exception("timeout");
		}
		
		return buffer.toString();
	}
	
}