functions.java

package cloud_project;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Scanner;

import org.json.JSONException;
import org.json.JSONObject;

public class functions {
	
	private static String readAll(Reader rd) throws IOException {
	    StringBuilder sb = new StringBuilder();
	    int cp;
	    while ((cp = rd.read()) != -1) {
	      sb.append((char) cp);
	    }
	    return sb.toString();
	  }
	
	public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
		
		/* for proxy.
		InputStream is = null;
		String proxyHost = System.getProperty("https.proxyHost");
		int proxyPort = Integer.parseInt(System.getProperty("https.proxyPort"));
		if(proxyHost.trim().equals("")) 
			is = new URL(url).openStream();
		else
		{
			Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
			is = new URL(url).openStream();
		}
		*/
		
		
		System.setProperty("http.proxyHost", "proxy.iisc.ernet.in");
		System.setProperty("http.proxyPort", "3128");

	    InputStream is = new URL(url).openStream();
	    try 
	    {
	      BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
	      String jsonText = readAll(rd);
	      JSONObject json = new JSONObject(jsonText);
	      return json;
	    } finally {
	      is.close();
	    }
	  }
	

	
	
	
}