(Delphi DLL) HTTP POST JSON (application/json)

Demonstrates how to send a JSON POST using the application/json content-type.

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, HttpRequest, HttpResponse;

...

procedure TForm1.Button1Click(Sender: TObject);
var
req: HCkHttpRequest;
http: HCkHttp;
jsonText: PWideChar;
resp: HCkHttpResponse;

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

req := CkHttpRequest_Create();
http := CkHttp_Create();

// If any custom headers need to be included with the POST, add them
// by calling SetRequestHeader

// Note: An application should never explicitly set the Content-Length header.
// The Content-Length is automatically computed and added by Chilkat.

// Here are some examples of custom headers.  

// Perhaps your particular app needs some sort of custom-computed Authorization header...
CkHttp_SetRequestHeader(http,'Authorization','my-custom-computed-auth-value');

// Another custom header for some hypothetical app:
CkHttp_SetRequestHeader(http,'X-Pass-Timestamp','my-custom-computed-timestamp-value');

// We don't need to set the Content-Type header, becaue it is automatically set by Chilkat
// in the PostJson2 call below.

// The following "Accept" header may be set, but it really isn't necessary:
CkHttp_SetRequestHeader(http,'Accept','application/json');

jsonText := '{ some JSON text ... }';

// To use SSL/TLS, simply use "https://" in the URL.

resp := CkHttp_PostJson2(http,'http://www.someserver.com/someJsonEndpoint','application/json',jsonText);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
  end
else
  begin
    // Display the JSON response.
    Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
    CkHttpResponse_Dispose(resp);
  end;

CkHttpRequest_Dispose(req);
CkHttp_Dispose(http);

end;