Lazarus Pascal

ipstack.com IPv4 Geolocation Lookup

See more Geolocation Examples

Demonstrates how to lookup Geolocation data for an IPv4 address using the ipstack.com 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;
  v_type: string;
  continent_code: string;
  continent_name: string;
  country_code: string;
  country_name: string;
  region_code: string;
  region_name: string;
  city: string;
  zip: string;
  latitude: string;
  longitude: string;
  locationGeoname_id: string;
  locationCapital: string;
  locationCountry_flag: string;
  locationCountry_flag_emoji: string;
  locationCountry_flag_emoji_unicode: string;
  locationCalling_code: string;
  locationIs_eu: Boolean;
  i: Integer;
  count_i: Integer;
  code: string;
  name: string;
  native: 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.ipstack.com/149.250.207.170?access_key=YOUR_ACCESS_KEY');
  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",
  //    "type": "ipv4",
  //    "continent_code": "EU",
  //    "continent_name": "Europe",
  //    "country_code": "DE",
  //    "country_name": "Germany",
  //    "region_code": null,
  //    "region_name": null,
  //    "city": null,
  //    "zip": null,
  //    "latitude": 51.2993,
  //    "longitude": 9.491,
  //    "location": {
  //      "geoname_id": null,
  //      "capital": "Berlin",
  //      "languages": [
  //        {
  //          "code": "de",
  //          "name": "German",
  //          "native": "Deutsch"
  //        }
  //      ],
  //      "country_flag": "http:\/\/assets.ipstack.com\/flags\/de.svg",
  //      "country_flag_emoji": "\ud83c\udde9\ud83c\uddea",
  //      "country_flag_emoji_unicode": "U+1F1E9 U+1F1EA",
  //      "calling_code": "49",
  //      "is_eu": true
  //    }
  //  }

  ip := json.StringOf('ip');
  v_type := json.StringOf('type');
  continent_code := json.StringOf('continent_code');
  continent_name := json.StringOf('continent_name');
  country_code := json.StringOf('country_code');
  country_name := json.StringOf('country_name');
  region_code := json.StringOf('region_code');
  region_name := json.StringOf('region_name');
  city := json.StringOf('city');
  zip := json.StringOf('zip');
  latitude := json.StringOf('latitude');
  longitude := json.StringOf('longitude');
  locationGeoname_id := json.StringOf('location.geoname_id');
  locationCapital := json.StringOf('location.capital');
  locationCountry_flag := json.StringOf('location.country_flag');
  locationCountry_flag_emoji := json.StringOf('location.country_flag_emoji');
  locationCountry_flag_emoji_unicode := json.StringOf('location.country_flag_emoji_unicode');
  locationCalling_code := json.StringOf('location.calling_code');
  locationIs_eu := json.BoolOf('location.is_eu');
  i := 0;
  count_i := json.SizeOfArray('location.languages');
  while i < count_i do
    begin
      json.I := i;
      code := json.StringOf('location.languages[i].code');
      name := json.StringOf('location.languages[i].name');
      native := json.StringOf('location.languages[i].native');
      i := i + 1;
    end;



  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.