import android.os.AsyncTask;
import android.text.format.DateFormat;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CookieStore;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.auth.DigestScheme;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import java.io.IOException;
import java.net.URI;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

public class FormUploader extends AsyncTask<String,Void,String> {
    public static final String OPEN_ROSA_VERSION_HEADER = "X-OpenRosa-Version";
    public static final String OPEN_ROSA_VERSION = "1.0";
    private static final String DATE_HEADER = "Date";

    public static final String HTTP_CONTENT_TYPE_TEXT_XML = "text/xml";
    public static final int CONNECTION_TIMEOUT = 30000;

    public static final String ACCEPT_ENCODING_HEADER = "Accept-Encoding";
    public static final String GZIP_CONTENT_ENCODING = "gzip";

    protected String doInBackground(String...p){
        String result = " ";
        HttpContext localContext = new BasicHttpContext();
        HttpClient httpClient = new DefaultHttpClient();
        CookieStore cookieStore = new BasicCookieStore();
        CredentialsProvider credsProvider = new BasicCredentialsProvider();

        credsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("****", "****"));
        localContext.setAttribute(ClientContext.CREDS_PROVIDER, credsProvider);
        localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);

        HttpHead req = new HttpHead(URI.create("http://**.*.**.***:****/ODKAggregate"));
        req.setHeader(OPEN_ROSA_VERSION_HEADER, OPEN_ROSA_VERSION);
        req.addHeader(ACCEPT_ENCODING_HEADER, GZIP_CONTENT_ENCODING);

        GregorianCalendar g = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
        g.setTime(new Date());
        req.setHeader(DATE_HEADER, DateFormat.format("E, dd MMM yyyy hh:mm:ss zz", g).toString());
        try {

            HttpResponse response = httpClient.execute(req, localContext);
            HttpEntity entity = response.getEntity();

            if (entity != null) {
                result = "success";
            }
        } catch (IOException e) {
            result = e.toString();
        }

        return result;
    }
}