(Delphi ActiveX) MaxMind IPv4 Geolocation Lookup

Demonstrates how to lookup Geolocation data for an IPv4 address using the MaxMind GeoIP2 Precision Web Service.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
jsonStr: WideString;
json: TChilkatJsonObject;
success: Integer;
continentCode: WideString;
continentGeoname_id: Integer;
continentNamesJa: WideString;
continentNamesPt_BR: WideString;
continentNamesRu: WideString;
continentNamesZh_CN: WideString;
continentNamesDe: WideString;
continentNamesEn: WideString;
continentNamesEs: WideString;
continentNamesFr: WideString;
countryIs_in_european_union: Integer;
countryIso_code: WideString;
countryGeoname_id: Integer;
countryNamesFr: WideString;
countryNamesJa: WideString;
countryNamesPt_BR: WideString;
countryNamesRu: WideString;
countryNamesZh_CN: WideString;
countryNamesDe: WideString;
countryNamesEn: WideString;
countryNamesEs: WideString;
maxmindQueries_remaining: Integer;
registered_countryIs_in_european_union: Integer;
registered_countryIso_code: WideString;
registered_countryGeoname_id: Integer;
registered_countryNamesEs: WideString;
registered_countryNamesFr: WideString;
registered_countryNamesJa: WideString;
registered_countryNamesPt_BR: WideString;
registered_countryNamesRu: WideString;
registered_countryNamesZh_CN: WideString;
registered_countryNamesDe: WideString;
registered_countryNamesEn: WideString;
traitsIp_address: WideString;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);

http.Login := 'MAXMIND_ACCOUNT_ID';
http.Password := 'MAXMIND_LICENSE_KEY';
http.Accept := 'application/json';

// Lookup an IPv4 address: 149.250.207.170  (this was a randomly chosen address)
jsonStr := http.QuickGetStr('https://geoip.maxmind.com/geoip/v2.1/country/149.250.207.170');
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
json.EmitCompact := 0;
success := json.Load(jsonStr);

Memo1.Lines.Add(json.Emit());

// Sample output:
// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "continent": {
//     "code": "EU",
//     "geoname_id": 6255148,
//     "names": {
//       "ja": "?????",
//       "pt-BR": "Europa",
//       "ru": "??????",
//       "zh-CN": "??",
//       "de": "Europa",
//       "en": "Europe",
//       "es": "Europa",
//       "fr": "Europe"
//     }
//   },
//   "country": {
//     "is_in_european_union": true,
//     "iso_code": "DE",
//     "geoname_id": 2921044,
//     "names": {
//       "fr": "Allemagne",
//       "ja": "????????",
//       "pt-BR": "Alemanha",
//       "ru": "????????",
//       "zh-CN": "??",
//       "de": "Deutschland",
//       "en": "Germany",
//       "es": "Alemania"
//     }
//   },
//   "maxmind": {
//     "queries_remaining": 49999
//   },
//   "registered_country": {
//     "is_in_european_union": true,
//     "iso_code": "DE",
//     "geoname_id": 2921044,
//     "names": {
//       "es": "Alemania",
//       "fr": "Allemagne",
//       "ja": "????????",
//       "pt-BR": "Alemanha",
//       "ru": "????????",
//       "zh-CN": "??",
//       "de": "Deutschland",
//       "en": "Germany"
//     }
//   },
//   "traits": {
//     "ip_address": "149.250.207.170"
//   }
// }
// 
// 

continentCode := json.StringOf('continent.code');
continentGeoname_id := json.IntOf('continent.geoname_id');
continentNamesJa := json.StringOf('continent.names.ja');
continentNamesPt_BR := json.StringOf('continent.names.pt-BR');
continentNamesRu := json.StringOf('continent.names.ru');
continentNamesZh_CN := json.StringOf('continent.names.zh-CN');
continentNamesDe := json.StringOf('continent.names.de');
continentNamesEn := json.StringOf('continent.names.en');
continentNamesEs := json.StringOf('continent.names.es');
continentNamesFr := json.StringOf('continent.names.fr');
countryIs_in_european_union := json.BoolOf('country.is_in_european_union');
countryIso_code := json.StringOf('country.iso_code');
countryGeoname_id := json.IntOf('country.geoname_id');
countryNamesFr := json.StringOf('country.names.fr');
countryNamesJa := json.StringOf('country.names.ja');
countryNamesPt_BR := json.StringOf('country.names.pt-BR');
countryNamesRu := json.StringOf('country.names.ru');
countryNamesZh_CN := json.StringOf('country.names.zh-CN');
countryNamesDe := json.StringOf('country.names.de');
countryNamesEn := json.StringOf('country.names.en');
countryNamesEs := json.StringOf('country.names.es');
maxmindQueries_remaining := json.IntOf('maxmind.queries_remaining');
registered_countryIs_in_european_union := json.BoolOf('registered_country.is_in_european_union');
registered_countryIso_code := json.StringOf('registered_country.iso_code');
registered_countryGeoname_id := json.IntOf('registered_country.geoname_id');
registered_countryNamesEs := json.StringOf('registered_country.names.es');
registered_countryNamesFr := json.StringOf('registered_country.names.fr');
registered_countryNamesJa := json.StringOf('registered_country.names.ja');
registered_countryNamesPt_BR := json.StringOf('registered_country.names.pt-BR');
registered_countryNamesRu := json.StringOf('registered_country.names.ru');
registered_countryNamesZh_CN := json.StringOf('registered_country.names.zh-CN');
registered_countryNamesDe := json.StringOf('registered_country.names.de');
registered_countryNamesEn := json.StringOf('registered_country.names.en');
traitsIp_address := json.StringOf('traits.ip_address');
end;