HTTP Post and certificate

Asked by: kapot

Hi,

I need a working example accessing a URL using HTTP POST method with certificate.

For example:

The URL is http://www.example.com/sendform.asmx

With 2 form fields: Name and Description (contain text).

And the security certificate that I got is "cert.pfx".

Basically, I use Internet Explorer to test the URL (and installed the certificate first). It is working fine with IE. But now, I want to access the URL from a Delphi application (I use Delphi 7).

So, I need a working example and instruction what to do with the certificate and how to submit HTTP Post.

I prefer to use Indy component if possible. But not TWebBrowser :)

Thanks.

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Ok, here is the solution.

First, convert the cert.pfx to cert.pem using OPENSSL :

openssl pkcs12 -in cert.pfx -out cert.pem -nodes

You can download and install the OpenSSL for Windows.

Then, here is the Delphi Code to submit the URL and receive the web page:

I hope that this will help other users :)

Thanks everyone, and sorry for the delay, it was weekend and I was out of town.

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls,Forms,
  Dialogs, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
  IdHTTP, StdCtrls, ExtCtrls, IdServerIOHandler, IdSSLOpenSSL,
  IdIOHandler, IdIOHandlerSocket, IdSSLOpenSSLHeaders, HTTPApp;
 
 
procedure TForm1.FormCreate(Sender: TObject);
begin
  idSSLOpenSSLHeaders.Load;
end;
 
procedure TForm1.Button2Click(Sender: TObject);
var
  URL: string;
  ReturnedPage: string;
  SSLIOHandler: TIDSSLIOHandlerSocket;
 
  Params: TStringStream;
 
begin
  SSLIOHandler:= TIDSSLIOHandlerSocket.Create(nil);
 
  URL := 'http://www.example.com/sendform.asmx';
 
  Params := TStringStream.Create('');
 
  try
    // This is the location of the certificate that has been converted using OpenSSL
 
    SSLIOHAndler.SSLOptions.CertFile := 'C:\Certificate\cert.pem';
    h.IOHandler := SSLIOHandler;
 
    Params.WriteString(HTMLEncode('Name=Gourmet'+'&'));
    Params.WriteString(HTMLEncode('Description=Food'));
 
    // Need this one for sure!
    h.Request.ContentType := 'application/x-www-form-urlencoded';
 
    // Send HTTP Post request with the above Params and get the result into the ReturnedPage string
    ReturnedPage:= h.Post(URL, Params);
 
    // Finally, display the result into TMemo
    memo1.Text := ReturnedPage;
  except
    on E: Exception do
      ShowMessage('Error: ' + E.Message);
  end;
 
  SSLIOHandler.Free;
  Params.Free;
end;

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HTTP Post and certificate

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