Delphi DLL

api.db-ip.com IPv4 Geolocation Lookup

See more Geolocation Examples

Demonstrates how to lookup Geolocation data for an IPv4 address using the api.db-ip.com REST API. Delphi 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
success: Boolean;
http: HCkHttp;
jsonStr: PWideChar;
json: HCkJsonObject;
ipAddress: PWideChar;
continentCode: PWideChar;
continentName: PWideChar;
countryCode: PWideChar;
countryName: PWideChar;
stateProv: PWideChar;
city: PWideChar;

begin
success := False;

// 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.db-ip.com/v2/free/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

// {
//   "ipAddress": "149.250.207.170",
//   "continentCode": "EU",
//   "continentName": "Europe",
//   "countryCode": "DE",
//   "countryName": "Germany",
//   "stateProv": "Baden-W\u00fcrttemberg",
//   "city": "B\u00f6blingen"
// }

ipAddress := CkJsonObject__stringOf(json,'ipAddress');
continentCode := CkJsonObject__stringOf(json,'continentCode');
continentName := CkJsonObject__stringOf(json,'continentName');
countryCode := CkJsonObject__stringOf(json,'countryCode');
countryName := CkJsonObject__stringOf(json,'countryName');
stateProv := CkJsonObject__stringOf(json,'stateProv');
city := CkJsonObject__stringOf(json,'city');

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);

end;