Using Delphi IDhttp Post Method on Secure Site with Cookies : I am trying to use the IDhttp Post method to submit a form on a website that I just can't crack. I have tried several iterations and changes to my code and have hit a road block that I need to get help with. I am relatively new to IDhttp and its usage and so I beg forgiveness for anything that is just plain stupid about my code.

Here is my current code in Delphi:

    procedure TMSBS_App_GUI.SubmitClick(Sender: TObject);
    Var
      Response : String;
      ResponseSet : TStringStream;
      Params : TStringList;
      IdHttp : TIDHttp;
      IdSSL : TIdSSLIOHandlerSocketOpenSSL;
      CookieMonster : TidCookieManager;

    begin
      Params := TStringList.Create;
      Params.Add('username=' + 'username');
      Params.Add('submit.value=' + 'submit');
      idhttp := TIdhttp.Create;
      idhttp.AllowCookies := True;
      CookieMonster := TiDCookieManager.Create;
      idHttp.CookieManager := CookieMonster;
      idSSLOpenSSLHeaders.Load;
      IdSSL := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
      idHttp.ReadTimeout := 30000;
      idHttp.IOHandler := idSSL;
      idHttp.Get('https://' + website);
      idhttp.Request.ContentType := 'application/x-www-form-urlencoded';
      idhttp.Request.Referer := 'http://' + website;
      idSSL.SSLOptions.Method := sslvTLSv1;
      idSSL.SSLOptions.Mode := sslmUnassigned;
      ResponseSet := TStringStream.Create(nil);
      Try
        Memo1.Text := idHttp.Post('https://' + website,Params);
      Finally
        Params.Free;
        ResponseSet.Free;
     End;
       end;

This is the Form from the webpage:

    <!-- SiteMinder Encoding=ISO-8859-1; --> 
    <!-- FCC File : (generic) caloglfn.fcc version 1.4-->
    
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
    <html xmlns="http://www.w3.org/1999/xhtml"> 
    <head> 
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
    <META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE"> 
    <link rel="stylesheet" type="text/css" href="styles.css" /> 
 
    <!-- Cross-frame scripting prevention: This code will prevent this page from being encapsulated within HTML frames. Remove, or comment out, this code if the functionality that is contained in this SiteMinder page is to be included within HTML frames. --> 
    <SCRIPT type="text/javascript" src="https://ff.kis.v2.scr.kaspersky-labs.com/D0501246-9A02-314D-B50C-0C6D353C6332/main.js" charset="UTF-8"></script><link rel="stylesheet" crossorigin="anonymous" href="https://ff.kis.v2.scr.kaspersky-labs.com/2336C353D6C0-C05B-D413-20A9-6421050D/abn/main.css"/><script> 
    if (top !=self) 
    top.location=self.location; 
    </SCRIPT> 
 
    <title>Member/Pensioner Services Online Login</title> 
    <script> 
    function submit_form() 
    { 
      document.mos_form.username.value = document.mos_form.pUserID.value + document.mos_form.pDOB.value  
 
      document.mos_form.submit() 
    } 
    </script> 
 
    </head> 
    <body> 
    <div id="wrapper"> 
        <div id="help">
    	 <a style="border-bottom:none;" href="mso_pso_access_help.html" target="_blank"><img STYLE="border:none;" src="Help_button.png" alt="Help" align="right"> </a>
       </div>
        <div id="header"> 
        <img class="crest" src="crest.png" alt="Crest - Superannuation Corporation" align="left"> 
        <img class="logo" src="mso_pso.png" alt="Pensioner Services Online (PSO) and Member Services Online (MSO)" align="right"> 
      </div> 
	    <div id="toplinks"> 
        </div> 
 
    <div id="form"> 
    <form name="mos_form" method="POST" enctype="application/x-www-form-urlencoded" autocomplete="off"> 
    <input type="hidden" name="autherrmsg" value="Login failed. Please try again."/> 
 
      <table width="100%" border="0" cellspacing="2" cellpadding="2">
        <tr> 
            <td align="left">
                <H1>
    	        <span style="color: #3E842E;">Member Access</span>
	        </H1>
    	</td>
        </tr>

        <tr>
            <td>
                <p><font color="red">  </font></p> 
                <p>   
                   To gain access to the complete range of online services, please enter your Membership Number, Date of Birth and Password below. 
                </p>
                <p> If you need any help, click on Help in the top right-hand corner of this screen.</p>
                <p> </p> 
            </td>        
        </tr>
      </table>

      <label for="hidden_username"></label> 
      <input type="hidden" name="username"> 
      <label for="hidden_url"></label> 
      <input type="hidden" name="url" value="<ERROR_INFORMATION>" READONLY> 
      <label for="hidden_proxy"></label> 
      <input type="hidden" name="proxypath" value="<PROXY_PATH>"> 
 
      <table width="900" border="0">
            <tr height="38" valign="top">
                <td width="200px" align="right" > <label for="mem_num" id="mem_num_label">Membership Number </label> </td>
                <td width="200px" > <input id="pUserID" type="text" name="pUserID" value="" size="27" maxlength="13" id="mem_num"> </td>
                <td width="500px">
	        &nbsp;&nbsp;
                    <img STYLE="border:none;" src="mso_pso_question.png" onmouseover="this.style.cursor = 'help';" 
                     title="Please enter your Membership Number.
    This is either your Employment Number or Pension Reference Number as found on our correspondence to you.
    If this is not available please Contact us.">
    	    </td>
            </tr>
            <tr height="38" valign="top">
                <td width="200px" align="right" > <label for="dob" id="dob_label">Date of Birth </label> </td>
                <td width="200px" > <input type="text" name="pDOB" value="" size="27" maxlength="8" id="dob" placeholder="DDMMYYYY"> </td>
                <td width="500px">
                &nbsp;&nbsp;
                    <img STYLE="border:none;" src="mso_pso_question.png" onmouseover="this.style.cursor = 'help';" 
                     title="Please enter your date of birth in this format: DDMMYYYY (e.g. 01021955).">
    	    </td>
            </tr>
            <tr height="38" valign="top">
                <td width="200px" align="right" > <label for="acc_num" id="acc_num_label">Password</label> </td>
                <td width="200px"> <input type="PASSWORD" name="password" value="" size="27" maxlength="30" id="acc_num"> </td>
                <td width="500px">
                &nbsp;&nbsp;
                    <img STYLE="border:none;" src="mso_pso_question.png" onmouseover="this.style.cursor = 'help';"
                      title='Please enter your Password.
    If you have forgotten your Password, use the &#34I&#39ve forgotten my password&#34 link to reset your access credentials.
    If you need to contact us, our details are available via the contact us button at the top right-hand corner of this screen.'>

    	    </td>
            </tr>
            </tr>
                       <tr height="38" valign="top">
                            <td width="200px" width=200></td>
                            <td width="200px" align="right"> <a href="https://www.*****.au/no-scheme-provided/register-or-reset"> I've forgotten my password </a> &nbsp;&nbsp; </td>
                            <td width="500px">
                       </tr>
            <tr height="38" valign="top">
                <td colspan=2 align="right"><a href="https://www.*****.au/register-or-reset/no-scheme-provided"> Register</a>&nbsp&nbsp <input type=button onclick=javascript:submit_form() value=Login> &nbsp;&nbsp;</td>
            </tr>
            <tr>
      </table>
 
      <script language="JavaScript"> 
                  <!-- the script here sets the focus on UserID field 
                  document.mos_form.pUserID.focus(); 
                  document.mos_form.pUserID.select(); 
                  function enter(e) 
                  { 
                     if (navigator.appName == "Netscape") 
                        whichASCII = e.which; 
                     else  
                        whichASCII = event.keyCode 
                     if (whichASCII == 13 ) 
                     { 
                        submit_form(); 
                     } 
                  } 
                     document.onkeypress = enter; 
                     if (navigator.appName == "Netscape") 
                         document.mos_form.pAccessCode.onkeypress = enter; 
                  // End of script --> 
                  </script> 
                   <!-- SiteMinder Variables START --> 
 
                   <input type=hidden name=target value="http://website"> 
                   <input type=hidden name=smauthreason value="0"> 
                   <input type=hidden name=smagentname value="boFynyFE9jczy7ra1lzqLmXPeVc9xLptAWQSI9ksks1Hx/oGQmJxQA7Fy25/Xt9X"> 
 
                   <!-- SiteMinder Variables END --> 
 
 
    </FORM> 
    </div> 
	    	<div id="footer"> 
                <table width=100% border=0 cellspacing="0" cellpadding="0"> 
                  <tr>  
                    <td height="30px"  align="left" valign="middle" bgcolor="#3E842E">&nbsp;&nbsp;  
    				<a href="http://www.*****.au/privacy" title="Privacy policy" target="_blank" class="wlink">Privacy</a> |  
                    <a href="http://www.*****.au/disclaimer" title="Disclaimer" target="_blank" class="wlink">Disclaimer</a> 
	    			</td> 
                  </tr> 
                  <tr>  
                    <td height="30px" colspan="2" valign="top" bgcolor="#949599" class="footer"><p class="footer"><span class="bold">Superannuation Company</span> ABN: ## ### ### ### AFSL: ###### RSEL: L#######<br /></td> 
                  </tr> 
                </table> 
		    </div> 
 
    </div> 

    <!--<script>
    function getParameterByName(name, url) {
        if (!url) url = window.location.href;
        name = name.replace(/[[]]/g, "\$&");
        var regex = new RegExp("[#&]" + name + "(=([^&#]*)|&|#|$)"),
            results = regex.exec(url);
        if (!results) return null;
        if (!results[2]) return '';
        return decodeURIComponent(results[2].replace(/+/g, " "));
    }

    document.getElementById('pUserID').value = getParameterByName('id');
    </script> -->

    </body> 
    </html> 

And here is the Ethereal packet for the Post Method:

    Hypertext Transfer Protocol
        POST /live/red_lojson/100eng.json?sh=0&ph=1383&ivh=928&dt=2720&pdt=214&ict=&pct=1&perf=widget%7C214%7C16%2Clojson%7C1027%7C656%2Csh%7C1031%7C0%2Csh%7C1035%7C16&rndr=render_toolbox%7C1375&cmenu=null&ppd=4&ppl=4&fbe=&xmv=0&xms=0&xmlc=0&jsfw=
            Request Method: POST
            Request URI [truncated]: /live/red_lojson/100eng.json?sh=0&ph=1383&ivh=928&dt=2720&pdt=214&ict=&pct=1&perf=widget%7C214%7C16%2Clojson%7C1027%7C656%2Csh%7C1031%7C0%2Csh%7C1035%7C16&rndr=render_toolbox%7C1375&cmenu=null&ppd=4&ppl=4&fbe=&xmv=
            Request Version: HTTP/1.1
        Host: m.addthis.com\r\n
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0\r\n
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n
        Accept-Language: en-US,en;q=0.5\r\n
        Accept-Encoding: gzip, deflate\r\n
        Referer: http://website/\r\n
        Content-Length: 0\r\n
        Content-Type: text/plain;charset=UTF-8\r\n
        Cookie: na_tc=Y; uid=597293e6c72cb3be; na_id=2017072123300513069970337317; uvc=27%7C47%2C4%7C48%2C0%7C49%2C10%7C50%2C3%7C51; loc=MDAwMDBPQ0FVTlMxNDYxMzMxMjAwMDAwMDAwVg==; mus=0; ssc=pinterest%3B1%2Cgoogle%3B1\r\n
        Connection: keep-alive\r\n
        \r\n
