Get Address Information by IP

Introduction

There are many IP to Address services such like http://www.hostip.info/, http://ip-lookup.net/, http://www.iplocation.net/ and so on, this post will talking about how to get address information by given IP via the API provided by Hostip.info.

Prerequest

The sample of this post is based on http://ben-bai.blogspot.tw/2012/02/java-practice-javanet-practice-use.html

Required jar files:


 json-lib: http://sourceforge.net/projects/json-lib/files/json-lib/
 commons-beanutils-1.8.3.jar http://commons.apache.org/beanutils/download_beanutils.cgi
 commons-collections-3.2.1.jar http://commons.apache.org/collections/download_collections.cgi
 commons-lang-2.5.jar http://commons.apache.org/lang/download_lang.cgi
 commons-logging-1.1.1.jar http://commons.apache.org/logging/download_logging.cgi
 ezmorph-1.0.6.jar http://sourceforge.net/projects/ezmorph/files/ezmorph/



The Program

IPLookupService.java

Get position by given IP and then get formatted address by given lat/lng

package test;

import java.io.InputStreamReader;

import net.sf.json.JSONObject;

/**
 * required jar files:
 * json-lib: http://sourceforge.net/projects/json-lib/files/json-lib/
 * commons-beanutils-1.8.3.jar http://commons.apache.org/beanutils/download_beanutils.cgi
 * commons-collections-3.2.1.jar http://commons.apache.org/collections/download_collections.cgi
 * commons-lang-2.5.jar http://commons.apache.org/lang/download_lang.cgi
 * commons-logging-1.1.1.jar http://commons.apache.org/logging/download_logging.cgi
 * ezmorph-1.0.6.jar http://sourceforge.net/projects/ezmorph/files/ezmorph/
 *
 */
public class IPLookupService {
    public static void main (String[] args) {
        AddressInfo info = ipToLocation("98.76.54.32");
        System.out.println(info.getCountryName());
        System.out.println(info.getCountryCode());
        System.out.println(info.getCity());
        System.out.println(info.getLat());
        System.out.println(info.getLng());
        System.out.println(info.getFormattedAddress());
    }
    /**
     * return country, city, address by given IP
     * @param ip
     * @return
     */
    public static AddressInfo ipToLocation (String ip) {
        String country;
        AddressInfo info = null;
        double lat;
        double lng;
        StringBuilder sb = getResponse(
                "http://api.hostip.info/get_json.php?ip=" + ip + "&position=true");
        JSONObject jobj = JSONObject.fromObject(sb.toString());
        lat = jobj.getDouble("lat");
        lng = jobj.getDouble("lng");
        info = new AddressInfo(jobj.getString("country_name"), jobj.getString("country_code"),
                jobj.getString("city"), lat, lng,
                GeocodeService.getAddressByLatLng(lat, lng, "ja"));
        return info;
    }
    public static StringBuilder getResponse(String path){
        try {
            java.net.URL url = new java.net.URL(path);
            java.net.HttpURLConnection uc = (java.net.HttpURLConnection) url.openConnection();
            uc.setRequestProperty("User-agent", "Mozilla/5.0");

            uc.setRequestProperty("Accept-Charset", "UTF-8"); // encoding
            uc.setReadTimeout(30000);// timeout limit
            uc.connect();// connect
            int status = uc.getResponseCode();

            switch (status) {
                case java.net.HttpURLConnection.HTTP_GATEWAY_TIMEOUT://504 timeout
                    break;
                case java.net.HttpURLConnection.HTTP_FORBIDDEN://403 forbidden
                    break;
                case java.net.HttpURLConnection.HTTP_INTERNAL_ERROR://500 server error
                    break;
                case java.net.HttpURLConnection.HTTP_NOT_FOUND://404 not exist
                    break;
                case java.net.HttpURLConnection.HTTP_OK: // ok
                    InputStreamReader reader = new InputStreamReader(uc.getInputStream(), "UTF-8");

                    int ch;
                    StringBuilder sb = new StringBuilder("");
                    while((ch = reader.read())!= -1){
                        sb.append((char)ch);
                    }
                    return sb;
            }

        } catch (java.net.MalformedURLException e) { // invalid address format
            e.printStackTrace();
        } catch (java.io.IOException e) { // connection broken
            e.printStackTrace();
        }
        return null;
    }
}
class AddressInfo {
    private String _countryName;
    private String _countryCode;
    private String _city;
    private double _lat;
    private double _lng;
    private String _formattedAddress;
    AddressInfo (String countryName, String countryCode,
        String city, double lat, double lng, String formattedAddress) {
        _countryName = countryName;
        _countryCode = countryCode;
        _city = city;
        _lat = lat;
        _lng = lng;
        _formattedAddress = formattedAddress;
    }
    public String getCountryName () {
        return _countryName;
    }
    public String getCountryCode () {
        return _countryCode;
    }
    public String getCity () {
        return _city;
    }
    public double getLat () {
        return _lat;
    }
    public double getLng () {
        return _lng;
    }
    public String getFormattedAddress () {
        return _formattedAddress;
    }
}

function added to GeocodeService.java

The new function returns formatted address by given lat/lng

    /**
     * return formatted address by given lat/lng
     * @param lat
     * @param lng
     * @param lang
     * @return
     */
    public static String getAddressByLatLng (double lat, double lng, String lang) {
        StringBuilder sb = getResponse("http://maps.googleapis.com/maps/api/geocode/json?"
                + "latlng="+lat+","+lng
                + "&sensor=true&language="+lang);
        JSONObject jobj = JSONObject.fromObject(sb.toString());
        return jobj.getJSONArray("results").getJSONObject(0).getString("formatted_address");
    }

The Result

http://maps.googleapis.com/maps/api/geocode/json?latlng=33.7629,-84.4226&sensor=true&language=ja
UNITED STATES
US
Atlanta, GA
33.7629
-84.4226
1068 Simpson Rd NW, アトランタ ジョージア 30314 アメリカ合衆国

Reference

http://stackoverflow.com/questions/2362413/any-reliable-api-available-to-determine-users-city-and-country-from-ip-address


Download

sample code at github
https://github.com/benbai123/JSP_Servlet_Practice/blob/master/Practice/JAVA/Net/src/test/IPLookupService.java
https://github.com/benbai123/JSP_Servlet_Practice/blob/master/Practice/JAVA/Net/src/test/GeocodeService.java