Pascal (Lazarus/Delphi)

ip-api.com IPv4 Geolocation Lookup

See more Geolocation Examples

Demonstrates how to lookup Geolocation data for an IPv4 address using the ip-api.com API. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.JsonObject,
  Chilkat.Http;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  jsonStr: string;
  json: TJsonObject;
  as: string;
  city: string;
  country: string;
  countryCode: string;
  isp: string;
  lat: string;
  lon: string;
  org: string;
  query: string;
  region: string;
  regionName: string;
  status: string;
  timezone: string;
  zip: string;

begin
  success := False;

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

  http := THttp.Create;

  //  Lookup an IPv4 address: 149.250.207.170  (this was a randomly chosen address)
  jsonStr := http.QuickGetStr('http://ip-api.com/json/149.250.207.170');
  if (http.LastMethodSuccess = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  json := TJsonObject.Create;
  json.EmitCompact := False;
  success := json.Load(jsonStr);

  WriteLn(json.Emit());

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

  //  {
  //    "as": "AS15854 Hewlett Packard GmbH",
  //    "city": "B�blingen",
  //    "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-W�rttemberg",
  //    "status": "success",
  //    "timezone": "Europe/Berlin",
  //    "zip": "71034"
  //  }

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


  http.Free;
  json.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.