Lazarus Pascal

ipapi.co IPv4 Geolocation Lookup

See more Geolocation Examples

Demonstrates how to lookup Geolocation data for an IPv4 address using the ipapi.co REST API. Lazarus Pascal

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;
  ip: string;
  city: string;
  region: string;
  region_code: string;
  country: string;
  country_name: string;
  continent_code: string;
  in_eu: Boolean;
  postal: string;
  latitude: string;
  longitude: string;
  timezone: string;
  utc_offset: string;
  country_calling_code: string;
  currency: string;
  languages: string;
  asn: string;
  org: 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('https://ipapi.co/149.250.207.170/json');
  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

  //  {
  //    "ip": "149.250.207.170",
  //    "city": "B�blingen",
  //    "region": "Baden-W�rttemberg",
  //    "region_code": null,
  //    "country": "DE",
  //    "country_name": "Germany",
  //    "continent_code": "EU",
  //    "in_eu": true,
  //    "postal": null,
  //    "latitude": null,
  //    "longitude": null,
  //    "timezone": null,
  //    "utc_offset": null,
  //    "country_calling_code": "+49",
  //    "currency": "EUR",
  //    "languages": "de",
  //    "asn": "AS15854",
  //    "org": "EntServ Deutschland GmbH"
  //  }

  ip := json.StringOf('ip');
  city := json.StringOf('city');
  region := json.StringOf('region');
  region_code := json.StringOf('region_code');
  country := json.StringOf('country');
  country_name := json.StringOf('country_name');
  continent_code := json.StringOf('continent_code');
  in_eu := json.BoolOf('in_eu');
  postal := json.StringOf('postal');
  latitude := json.StringOf('latitude');
  longitude := json.StringOf('longitude');
  timezone := json.StringOf('timezone');
  utc_offset := json.StringOf('utc_offset');
  country_calling_code := json.StringOf('country_calling_code');
  currency := json.StringOf('currency');
  languages := json.StringOf('languages');
  asn := json.StringOf('asn');
  org := json.StringOf('org');


  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.