(Delphi DLL) POST application/json HTTPS Request

Demonstrates how to send an HTTPS POST where the request body and response body both have the application/json Content-Type. Also demonstrates how to add a few custom headers to the request.

Note: This example requires Chilkat v11.0.0 or greater.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
url: PWideChar;
jsonRequestBody: PWideChar;
resp: HCkHttpResponse;
jsonResponseStr: PWideChar;

begin
success := False;

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

http := CkHttp_Create();

// Add a few custom headers.
CkHttp_SetRequestHeader(http,'Client-ID','my_client_id');
CkHttp_SetRequestHeader(http,'Client-Token','my_client_token');

CkHttp_putAccept(http,'application/json');

url := 'https://api.fiscallog.eu/sign/v1';
jsonRequestBody := '{ .... }';
resp := CkHttpResponse_Create();
success := CkHttp_HttpStr(http,'POST',url,jsonRequestBody,'utf-8','application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('Response status code = ' + IntToStr(CkHttpResponse_getStatusCode(resp)));
jsonResponseStr := CkHttpResponse__bodyStr(resp);

Memo1.Lines.Add(jsonResponseStr);

CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);

end;