Pascal (Lazarus/Delphi)

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Demonstrates how to send a POST with the hash_hmac(sha256,partnerid+timestamp+path,secretkey) authentication. 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.Http,
  Chilkat.CkDateTime,
  Chilkat.HttpResponse,
  Chilkat.StringBuilder,
  Chilkat.JsonObject,
  Chilkat.Crypt2;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  dt: TCkDateTime;
  timestamp: string;
  partnerId: string;
  crypt: TCrypt2;
  sbMacData: TStringBuilder;
  auth: string;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  game_category: string;
  game_code: string;
  game_name: string;
  icon_url: string;
  game_status: string;
  updated_at: string;
  status: Integer;
  reason: string;
  i: Integer;
  count_i: Integer;

begin
  success := False;

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

  http := THttp.Create;

  //  Implements the following CURL command:

  //  curl --request POST 'https://dev-api.unipin.com/in-game-topup/list' \
  //  --header 'partnerid: 587e3675-e0ed-4e9e-9b39-099b11498fdc' \
  //  --header 'timestamp: 1566552295' \
  //  --header 'path: in-game-topup/list' \
  //  --header 'auth: 1d9f5e7aca9f3c14da7c957d6977447739877cebfc10fcf3682bd32da47a2bda' \
  //  --header 'Content-Type: application/json'

  //  Use the following online tool to generate HTTP code from a CURL command
  //  Convert a cURL Command to HTTP Source Code

  dt := TCkDateTime.Create;
  dt.SetFromCurrentSystemTime();
  timestamp := dt.GetAsUnixTimeStr(False);

  //  Change this to your actual partner ID.
  partnerId := '587e3675-e0ed-4e9e-9b39-099b11498fdc';

  http.SetRequestHeader('path','in-game-topup/list');
  http.SetRequestHeader('timestamp',timestamp);
  http.SetRequestHeader('partnerid',partnerId);
  http.SetRequestHeader('Content-Type','application/json');

  //  Calculate the auth header using  hash_hmac(sha256,partnerid+timestamp+path,secretkey)
  crypt := TCrypt2.Create;
  crypt.MacAlgorithm := 'hmac';
  crypt.HashAlgorithm := 'sha256';
  crypt.EncodingMode := 'hexlower';

  //  Change this to your actual secret key..
  crypt.SetMacKeyEncoded('wabc123asljdgadlgd3','us-ascii');

  sbMacData := TStringBuilder.Create;
  sbMacData.Append(partnerId);
  sbMacData.Append(timestamp);
  sbMacData.Append('in-game-topup/list');

  auth := crypt.MacStringENC(sbMacData.GetAsString());
  http.SetRequestHeader('auth',auth);

  resp := THttpResponse.Create;
  success := http.HttpNoBody('POST','https://dev-api.unipin.com/in-game-topup/list',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);
  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  Sample JSON response:
  //  (Sample code for parsing the JSON response is shown below)

  //  {
  //    "game_list": [
  //      {
  //        "game_category": "MLBB_ID",
  //        "game_code": "MLBBD_ID",
  //        "game_name": "Mobile Legends Diamonds",
  //        "icon_url": "http://dev-backoffice.unipin.com/images/icon_direct_topup_games/1565343343-icon-1548659712-icon-Mobile legend 300x300 px.png",
  //        "game_status": "active",
  //        "updated_at": "2019-08-09 16:35:43"
  //      },
  //      {
  //        "game_category": "MLBB_ID",
  //        "game_code": "MLBBS_ID",
  //        "game_name": "Mobile Legends Starlight Member",
  //        "icon_url": "http://dev-backoffice.unipin.com/images/icon_direct_topup_games/1565343258-icon-1548659712-icon-Mobile legend 300x300 px.png",
  //        "game_status": "active",
  //        "updated_at": "2019-08-09 16:34:18"
  //      },
  //  ...
  //  ...
  //    ],
  //    "status": 1,
  //    "reason": "Successful"
  //  }

  //  Sample code for parsing the JSON response...
  //  Use the following online tool to generate parsing code from sample JSON:
  //  Generate Parsing Code from JSON

  status := jResp.IntOf('status');
  reason := jResp.StringOf('reason');
  i := 0;
  count_i := jResp.SizeOfArray('game_list');
  while i < count_i do
    begin
      jResp.I := i;
      game_category := jResp.StringOf('game_list[i].game_category');
      game_code := jResp.StringOf('game_list[i].game_code');
      game_name := jResp.StringOf('game_list[i].game_name');
      icon_url := jResp.StringOf('game_list[i].icon_url');
      game_status := jResp.StringOf('game_list[i].game_status');
      updated_at := jResp.StringOf('game_list[i].updated_at');
      i := i + 1;
    end;



  http.Free;
  dt.Free;
  crypt.Free;
  sbMacData.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.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.