(Delphi ActiveX) HTTP POST (Duplicate Simple HTML Form POST)

Demonstrates how to duplicate a simple HTML form POST.

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
req: TChilkatHttpRequest;
http: TChilkatHttp;
success: Integer;
domain: WideString;
port: Integer;
tls: Integer;
resp: IChilkatHttpResponse;

begin
// 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);

// This example simulates this FORM:
// <form action="echoPost.asp" method="post">
// First name: <input type="text" name="firstName"><br />
// Last name: <input type="text" name="lastName"><br />
// <input type="submit" value="Submit">
// </form>
// The online FORM is found at this URL:
// https://www.chilkatsoft.com/simpleForm.html

// Build an HTTP POST Request:
req.HttpVerb := 'POST';

// The FORM target is http://www.chilkatsoft.com/processPost.asp
// An easy way of filling out most of the HTTP request object
// is to call SetFromUrl:
req.SetFromUrl('https://www.chilkatsoft.com/echoPost.asp');

// Send form params using application/x-www-form-urlencoded
req.ContentType := 'application/x-www-form-urlencoded';

// The only remaining task is to add the params to the 
// HTTP request object:
req.AddParam('firstName','Matt');
req.AddParam('lastName','Jones');

// Send the HTTP POST and get the response.
// The POST is being sent to chilkatsoft.com, on port 443 (using TLS)
domain := 'chilkatsoft.com';
port := 443;
tls := 1;

// The HTTP POST is sent here:
resp := http.SynchronousRequest(domain,port,tls,req.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// Display the HTML source of the page returned.
Memo1.Lines.Add(resp.BodyStr);
end;