(Delphi DLL) ipstack.com IPv4 Geolocation Lookup

Demonstrates how to lookup Geolocation data for an IPv4 address using the ipstack.com REST API.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
jsonStr: PWideChar;
json: HCkJsonObject;
success: Boolean;
ip: PWideChar;
v_type: PWideChar;
continent_code: PWideChar;
continent_name: PWideChar;
country_code: PWideChar;
country_name: PWideChar;
region_code: PWideChar;
region_name: PWideChar;
city: PWideChar;
zip: PWideChar;
latitude: PWideChar;
longitude: PWideChar;
locationGeoname_id: PWideChar;
locationCapital: PWideChar;
locationCountry_flag: PWideChar;
locationCountry_flag_emoji: PWideChar;
locationCountry_flag_emoji_unicode: PWideChar;
locationCalling_code: PWideChar;
locationIs_eu: Boolean;
i: Integer;
count_i: Integer;
code: PWideChar;
name: PWideChar;
native: PWideChar;

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

http := CkHttp_Create();

// Lookup an IPv4 address: 149.250.207.170  (this was a randomly chosen address)
jsonStr := CkHttp__quickGetStr(http,'http://api.ipstack.com/149.250.207.170?access_key=YOUR_ACCESS_KEY');
if (CkHttp_getLastMethodSuccess(http) = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

json := CkJsonObject_Create();
CkJsonObject_putEmitCompact(json,False);
success := CkJsonObject_Load(json,jsonStr);

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

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

// {
//   "ip": "149.250.207.170",
//   "type": "ipv4",
//   "continent_code": "EU",
//   "continent_name": "Europe",
//   "country_code": "DE",
//   "country_name": "Germany",
//   "region_code": null,
//   "region_name": null,
//   "city": null,
//   "zip": null,
//   "latitude": 51.2993,
//   "longitude": 9.491,
//   "location": {
//     "geoname_id": null,
//     "capital": "Berlin",
//     "languages": [
//       {
//         "code": "de",
//         "name": "German",
//         "native": "Deutsch"
//       }
//     ],
//     "country_flag": "http:\/\/assets.ipstack.com\/flags\/de.svg",
//     "country_flag_emoji": "\ud83c\udde9\ud83c\uddea",
//     "country_flag_emoji_unicode": "U+1F1E9 U+1F1EA",
//     "calling_code": "49",
//     "is_eu": true
//   }
// }

ip := CkJsonObject__stringOf(json,'ip');
v_type := CkJsonObject__stringOf(json,'type');
continent_code := CkJsonObject__stringOf(json,'continent_code');
continent_name := CkJsonObject__stringOf(json,'continent_name');
country_code := CkJsonObject__stringOf(json,'country_code');
country_name := CkJsonObject__stringOf(json,'country_name');
region_code := CkJsonObject__stringOf(json,'region_code');
region_name := CkJsonObject__stringOf(json,'region_name');
city := CkJsonObject__stringOf(json,'city');
zip := CkJsonObject__stringOf(json,'zip');
latitude := CkJsonObject__stringOf(json,'latitude');
longitude := CkJsonObject__stringOf(json,'longitude');
locationGeoname_id := CkJsonObject__stringOf(json,'location.geoname_id');
locationCapital := CkJsonObject__stringOf(json,'location.capital');
locationCountry_flag := CkJsonObject__stringOf(json,'location.country_flag');
locationCountry_flag_emoji := CkJsonObject__stringOf(json,'location.country_flag_emoji');
locationCountry_flag_emoji_unicode := CkJsonObject__stringOf(json,'location.country_flag_emoji_unicode');
locationCalling_code := CkJsonObject__stringOf(json,'location.calling_code');
locationIs_eu := CkJsonObject_BoolOf(json,'location.is_eu');
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'location.languages');
while i < count_i do
  begin
    CkJsonObject_putI(json,i);
    code := CkJsonObject__stringOf(json,'location.languages[i].code');
    name := CkJsonObject__stringOf(json,'location.languages[i].name');
    native := CkJsonObject__stringOf(json,'location.languages[i].native');
    i := i + 1;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);

end;