Android HTTP Helper

HttpHelper.java

/*
 *  Copyright (c) 2011 by Twilio, Inc., all rights reserved.
 *
 *  Use of this software is subject to the terms and conditions of
 *  the Twilio Terms of Service located at http://www.twilio.com/legal/tos
 */

package com.twilio.ipmessaging.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;

public abstract class HttpHelper
{

    private static String stringFromInputStream(InputStream is) throws IOException
    {
        char[] buf = new char[1024];
        StringBuilder out = new StringBuilder();

        Reader in = new InputStreamReader(is, "UTF-8");

        int bin;
        while ((bin = in.read(buf, 0, buf.length)) >= 0) {
            out.append(buf, 0, bin);
        }

        return out.toString();
    }

    public static String httpGet(String url) throws Exception {

        URL urlObj = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();

        conn.setConnectTimeout(45000);
        conn.setReadTimeout(30000);
        conn.setDoInput(true);

        int responseCode = conn.getResponseCode();

        if (responseCode == HttpURLConnection.HTTP_OK) {
            InputStream is = conn.getInputStream();
            String capabilityToken = stringFromInputStream(is);
            is.close();
            conn.disconnect();
            return capabilityToken;
        } else {
            conn.disconnect();
            throw new Exception("Got error code " + responseCode
                    + " from server");
        }
    }
}