Delphi DLL

HTTP POST (Duplicate Simple HTML Form POST)

Demonstrates how to duplicate a simple HTML form POST. Delphi 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
success: Boolean;
req: HCkHttpRequest;
http: HCkHttp;
domain: PWideChar;
port: Integer;
tls: Boolean;
resp: HCkHttpResponse;

begin
success := False;

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

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

// 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:
CkHttpRequest_putHttpVerb(req,'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:
CkHttpRequest_SetFromUrl(req,'https://www.chilkatsoft.com/echoPost.asp');

// Send form params using application/x-www-form-urlencoded
CkHttpRequest_putContentType(req,'application/x-www-form-urlencoded');

// The only remaining task is to add the params to the 
// HTTP request object:
CkHttpRequest_AddParam(req,'firstName','Matt');
CkHttpRequest_AddParam(req,'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 := True;

// The HTTP POST is sent here:
resp := CkHttpResponse_Create();
success := CkHttp_HttpSReq(http,domain,port,tls,req,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

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

CkHttpRequest_Dispose(req);
CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);

end;