Retrieve spatial data via an HTTP request via Google Maps URL

Question

Good morning guys.

I’m looking to retrieve some geographic information using latitude and longitude as parameters.

To recover such information I am trying to make a request via URL through this link: Google Maps Geolocation API. It returns me an XML where I can work on it.

When creating this service on my web service, I went up to the Weblogic server under development (Running on Linux System) and it returns me the following error while running it:

java.io.FileNotFoundException: Response: '502: Bad Gateway' for url: 'http://maps.google.com/maps/api/geocode/xml?latlng=-15.8040195453225%2C-47.8799401993617'

I’ve tried several ways, but you keep making the same mistake. I’m using Google’s own code to consume the information, below:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLEncoder;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;

public class GeocodeProcessor {

    private static final String GEOCODE_REQUEST_PREFIX = "http://maps.google.com/maps/api/geocode/xml";

    private static final int PROXY_PORT                 = 3128;
    private static final String PROXY_HOST              = "vampre.funasa.gov";
    private static final int TIMEOUT                    = 30000;


    public static void main() throws IOException,
            URISyntaxException, ParserConfigurationException, SAXException {

        String urlString = null;

        urlString = GEOCODE_REQUEST_PREFIX + "?latlng=" + URLEncoder.encode("-15.8040195453225,-47.8799401993617", "UTF-8");
        System.out.println(urlString);

        // Convert the string to a URL so we can parse it
        URL url = new URL(urlString);

        Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(
                PROXY_HOST, PROXY_PORT));

        HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);
        conn.setConnectTimeout(TIMEOUT);
        conn.setRequestMethod("GET");
        conn.setRequestProperty("Accept", "application/xml");

        try {
            // open the connection and get results as InputSource.
            conn.connect();
            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(),
                    "UTF-8"));

            String line = null;
            StringBuilder ab = new StringBuilder();
            while( ( line = reader.readLine() ) != null )  {
                ab.append(line);
            }
            reader.close();

            System.out.println(ab.toString());

        } finally {
            conn.disconnect();
        }
    }

}

A help would be extremely useful now. Vlw galley.

Answer 1

The @Bruno is correct! Giving a bypass in your proxy, the code ran normally!

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

I was wondering, though, if there was anything wrong with the code of proxy - but it doesn’t seem to - I installed a server proxy to test - follows the log of the program:

Exit from your program:

The proxy program used was the Wingate.