(Delphi DLL) Transition from Http.PostJson3 to Http.HttpJson

Provides instructions for replacing deprecated PostJson3 method calls with HttpJson.

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, Http, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
url: PWideChar;
contentType: PWideChar;
json: HCkJsonObject;
responseObj: HCkHttpResponse;
responseOut: HCkHttpResponse;
success: Boolean;

begin
http := CkHttp_Create();

url := 'https://example.com/something';
contentType := 'application/json';
json := CkJsonObject_Create();
CkJsonObject_LoadFile(json,'C:/temp/requestBody.json');

// ------------------------------------------------------------------------
// The PostJson3 method is deprecated:

responseObj := CkHttp_PostJson3(http,url,contentType,json);
if (CkHttp_getLastMethodSuccess(http) = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// ...
// ...

CkHttpResponse_Dispose(responseObj);

// ------------------------------------------------------------------------
// Do the equivalent using HttpJson.
// Your application creates a new, empty HttpResponse object which is passed 
// in the last argument and filled upon success.

responseOut := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST',url,json,contentType,responseOut);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkHttpResponse_Dispose(responseOut);

end;