(Delphi DLL) ip-api.com IPv4 Geolocation Lookup

Demonstrates how to lookup Geolocation data for an IPv4 address using the ip-api.com 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;
as: PWideChar;
city: PWideChar;
country: PWideChar;
countryCode: PWideChar;
isp: PWideChar;
lat: PWideChar;
lon: PWideChar;
org: PWideChar;
query: PWideChar;
region: PWideChar;
regionName: PWideChar;
status: PWideChar;
timezone: PWideChar;
zip: 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://ip-api.com/json/149.250.207.170');
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

// {
//   "as": "AS15854 Hewlett Packard GmbH",
//   "city": "Bblingen",
//   "country": "Germany",
//   "countryCode": "DE",
//   "isp": "Triaton Frankfurt",
//   "lat": 48.6779,
//   "lon": 8.97297,
//   "org": "EntServ Deutschland GmbH",
//   "query": "149.250.207.170",
//   "region": "BW",
//   "regionName": "Baden-Wrttemberg",
//   "status": "success",
//   "timezone": "Europe/Berlin",
//   "zip": "71034"
// }

as := CkJsonObject__stringOf(json,'as');
city := CkJsonObject__stringOf(json,'city');
country := CkJsonObject__stringOf(json,'country');
countryCode := CkJsonObject__stringOf(json,'countryCode');
isp := CkJsonObject__stringOf(json,'isp');
lat := CkJsonObject__stringOf(json,'lat');
lon := CkJsonObject__stringOf(json,'lon');
org := CkJsonObject__stringOf(json,'org');
query := CkJsonObject__stringOf(json,'query');
region := CkJsonObject__stringOf(json,'region');
regionName := CkJsonObject__stringOf(json,'regionName');
status := CkJsonObject__stringOf(json,'status');
timezone := CkJsonObject__stringOf(json,'timezone');
zip := CkJsonObject__stringOf(json,'zip');

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);

end;