add support for more cookie flags in Request::AddCookie() method

changed in config options:
- renamed: http_session_id_name to session_cookie_name
- add config options: session_cookie_path, session_cookie_domain, session_cookie_same_site,
  session_cookie_http_only, session_cookie_secure

winixd/core/misc.cpp

@@ -1646,6 +1646,79 @@ bool is_in_list(const std::wstring & item, const std::set<std::wstring> & list)
 }
 
 
+void cookie_same_site_to_stream(CookieSameSite same_site, pt::Stream & stream)
+{
+	switch(same_site)
+	{
+	case CookieSameSite::samesite_strict:
+		stream << L"Strict";
+		break;
+
+	case CookieSameSite::samesite_lax:
+		stream << L"Lax";
+		break;
+
+	case CookieSameSite::samesite_none:
+		stream << L"None";
+		break;
+
+	default:
+		break;
+	}
+}
+
+
+void prepare_cookie_string(
+		pt::Stream & cookie,
+		const std::wstring * value_string,
+		const pt::Stream * value_stream,
+		pt::Date * expires,
+		const std::wstring * path,
+		const std::wstring * domain,
+		CookieSameSite cookie_same_site,
+		bool http_only,
+		bool secure)
+{
+	if( value_string )
+		cookie << *value_string;
+
+	if( value_stream )
+		cookie << *value_stream;
+
+	if( cookie.empty() )
+		cookie << L"\"\""; // cookie empty value
+
+	if( expires )
+		cookie << L"; expires=" << DateToStrCookie(*expires) << L" GMT";
+
+	if( path && !path->empty() )
+	{
+		cookie << L"; path=" << *path;
+	}
+
+	if( domain && !domain->empty() )
+		cookie << L"; domain=" << *domain;
+
+	if( cookie_same_site != CookieSameSite::samesite_notset )
+	{
+		cookie << L"; SameSite=";
+		cookie_same_site_to_stream(cookie_same_site, cookie);
+	}
+
+	if( http_only )
+		cookie << L"; HttpOnly";
+
+	/*
+		don't use '; secure' flag if you are using both sites (with SSL
+		and without SSL) -- with secure flag the cookie is sent only through
+		SSL and if you accidentally open a new window without SSL (http://)
+		then winix will create a new session for you and the previous session (https://)
+		will be lost (the session cookie will be overwritten in the client's browser)
+	*/
+	if( secure )
+		cookie << L"; Secure";
+}
+
 
 } // namespace Winix