Log in to website from Delphi

问题

I would ask if someone was kind enough to explain to me how to login at webpage from Delphi app. All the examples I've found here have proved useless to me or I'm doing something wrong. I'm tired of the search and the code that does not work.

There is no error message, I even get page code into Memo but seems it's code from login page (not account [dashboard] page) - seems this code can't pass auth at all and I don't know why.

What is wrong in this code :

procedure Login;
var
 HTTP: TIdHTTP;
 Param: TStringList;
 S: String;
begin
 HTTP := TIdHTTP.Create(nil);
 HTTP.CookieManager := Main_Form.CookieManager;
 Param := TStringList.Create;
 Param.Clear;
 Param.Add('login=example');
 Param.Add('password=example');

try
 HTTP.Get ('http://www.filestrum.com/login.html');
 HTTP.Post('http://www.filestrum.com/login.html', Param);
 S := HTTP.Get ('http://www.filestrum.com/?op=my_account');
 Main_Form.Memo2.Lines.Add(S);
finally
  HTTP.Free;
  Param.Free;
end;
end;

or with this version :

procedure Login;
var
 HTTP: TIdHTTP;
 S: String;
begin  
 HTTP                             := TIdHTTP.Create(nil);
 HTTP.CookieManager               := Main_Form.CookieManager;
 HTTP.Request.BasicAuthentication := True;
 HTTP.Request.Username            := 'example';
 HTTP.Request.Password            := 'example';
 HTTP.AllowCookies                := True;
 HTTP.HandleRedirects             := True;

 S := HTTP.Get ('http://www.filestrum.com/?op=my_account');
 Main_Form.Memo2.Lines.Add(S);
end;

Used Delphi XE2 and there is no way to make this code running and login. It's same with XE3 demo. As I said, I'm really tired searching some solution, waste days into it and nothing.

Please guys, some help here. Really need it.

回答1:

Try something like this:

function Login: string;
var
  IdHTTP: TIdHTTP;
  Request: TStringList;
  Response: TMemoryStream;
begin
  Result := '';
  try
    Response := TMemoryStream.Create;
    try
      Request := TStringList.Create;
      try
        Request.Add('op=login');
        Request.Add('redirect=http://www.filestrum.com');
        Request.Add('login=example');
        Request.Add('password=example');
        IdHTTP := TIdHTTP.Create;
        try
          IdHTTP.AllowCookies := True;
          IdHTTP.HandleRedirects := True;
          IdHTTP.Request.ContentType := 'application/x-www-form-urlencoded';
          IdHTTP.Post('http://www.filestrum.com/', Request, Response);
          Result := IdHTTP.Get('http://www.filestrum.com/?op=my_account');    
        finally
          IdHTTP.Free;
        end;
      finally
        Request.Free;
      end;
    finally
      Response.Free;
    end;
  except
    on E: Exception do
      ShowMessage(E.Message);
  end;
end;

来源：https://stackoverflow.com/questions/12722606/log-in-to-website-from-delphi

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