(Delphi ActiveX) WhatsApp - First Login

Log in the very first time to get your authentication token. The new login/password is passed in the JSON body of the request.

For more information, see https://developers.facebook.com/docs/whatsapp/api/users/login

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_v9_5_0_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;
json: TChilkatJsonObject;
resp: IChilkatHttpResponse;
sbResponseBody: TChilkatStringBuilder;
jResp: TChilkatJsonObject;
respStatusCode: Integer;
token: WideString;
expires_after: WideString;
i: Integer;
count_i: Integer;

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

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl -k -X POST https://your-webapp-hostname:your-webapp-port/v1/users/login \
//   -H 'Content-Type: application/json' \
//   --user 'admin:secret' \
//   -d '{"new_password" : "new-password"}'

http.Login := 'admin';
http.Password := 'secret';

// The following JSON is sent in the request body.

// {
//   "new_password": "new-password"
// }

json := TChilkatJsonObject.Create(Self);
json.UpdateString('new_password','new-password');

http.SetRequestHeader('Content-Type','application/json');

resp := http.PostJson3('https://your-webapp-hostname:your-webapp-port/v1/users/login','application/json',json.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

sbResponseBody := TChilkatStringBuilder.Create(Self);
resp.GetBodySb(sbResponseBody.ControlInterface);
jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.ControlInterface);
jResp.EmitCompact := 0;

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(jResp.Emit());

respStatusCode := resp.StatusCode;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(resp.Header);
    Memo1.Lines.Add('Failed.');

    Exit;
  end;

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

// {
//   "users": [
//     {
//       "token": "eyJhbGciOHlXVCJ9.eyJ1c2VyIjoNTIzMDE2Nn0.mEoF0COaO00Z1cANo",
//       "expires_after": "2018-03-01 15:29:26+00:00"
//     }
//   ]
// }

// Sample code for parsing the JSON response...

i := 0;
count_i := jResp.SizeOfArray('users');
while i < count_i do
  begin
    jResp.I := i;
    token := jResp.StringOf('users[i].token');
    expires_after := jResp.StringOf('users[i].expires_after');
    i := i + 1;
  end;
end;