Pascal (Lazarus/Delphi)

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. 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;
  ipAddress: string;
  continentCode: string;
  continentName: string;
  countryCode: string;
  countryName: string;
  stateProv: string;
  city: 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://api.db-ip.com/v2/free/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

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

  ipAddress := json.StringOf('ipAddress');
  continentCode := json.StringOf('continentCode');
  continentName := json.StringOf('continentName');
  countryCode := json.StringOf('countryCode');
  countryName := json.StringOf('countryName');
  stateProv := json.StringOf('stateProv');
  city := json.StringOf('city');


  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.