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

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

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

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_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
req: TChilkatHttpRequest;
http: TChilkatHttp;
jsonText: WideString;
resp: TChilkatHttpResponse;

begin
success := 0;

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

req := TChilkatHttpRequest.Create(Self);
http := TChilkatHttp.Create(Self);

// 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...
http.SetRequestHeader('Authorization','my-custom-computed-auth-value');

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

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

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

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

resp := TChilkatHttpResponse.Create(Self);
success := http.HttpStr('POST','http://www.someserver.com/someJsonEndpoint',jsonText,'utf-8','application/json',resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// Display the JSON response.
Memo1.Lines.Add(resp.BodyStr);
end;