url: HttpUrl,
    cookies: List<Cookie>,
  ) {
    val cookieStrings = mutableListOf<String>()
    for (cookie in cookies) {
      cookieStrings.add(cookieToString(cookie, true))
    }
    val multimap = mapOf("Set-Cookie" to cookieStrings)
    try {
      cookieHandler.put(url.toUri(), multimap)
    } catch (e: IOException) {
      Platform.get().log("Saving cookies failed for " + url.resolve("/...")!!, WARN, e)

            final Cookie[] cookies = req.getCookies();
            if (cookies != null) {
                for (final Cookie cookie : cookies) {
                    if (cookieName.equals(cookie.getName())) {
                        try {
                            final String encoded = cookie.getValue();

        final Cookie cookie = new Cookie(cookieName, userCode);
        cookie.setMaxAge(age);
        cookie.setHttpOnly(httpOnly);
        if (StringUtil.isNotBlank(cookieDomain)) {
            cookie.setDomain(cookieDomain);
        }
        if (StringUtil.isNotBlank(cookiePath)) {
            cookie.setPath(cookiePath);
        }
        cookie.setSecure(isSecureCookie());
        LaResponseUtil.getResponse().addCookie(cookie);
    }

  private val requestCookies: Deque<List<Cookie>> = ArrayDeque()
  private val responseCookies: Deque<List<Cookie>> = ArrayDeque()

  fun enqueueRequestCookies(vararg cookies: Cookie) {
    requestCookies.add(cookies.toList())
  }

  fun takeResponseCookies(): List<Cookie> = responseCookies.removeFirst()

  fun assertResponseCookies(vararg cookies: String?) {

     * @param request The HTTP request.
     * @param roleSet The set of roles.
     */
    protected void buildByCookieNameMapping(final HttpServletRequest request, final Set<String> roleSet) {
        final Cookie[] cookies = request.getCookies();
        if (cookies != null) {
            for (final Cookie cookie : cookies) {
                addRoleFromCookieMapping(roleSet, cookie);
            }
        }

   */
  fun loadForRequest(url: HttpUrl): List<Cookie>

  companion object {
    /** A cookie jar that never accepts any cookies. */
    @JvmField
    val NO_COOKIES: CookieJar = NoCookies()

    private class NoCookies : CookieJar {
      override fun saveFromResponse(
        url: HttpUrl,
        cookies: List<Cookie>,
      ) {
      }

    }

    return responseBuilder.build()
  }

  /** Returns a 'Cookie' HTTP request header with all cookies, like `a=b; c=d`. */
  private fun cookieHeader(cookies: List<Cookie>): String =
    buildString {
      cookies.forEachIndexed { index, cookie ->
        if (index > 0) append("; ")
        append(cookie.name).append('=').append(cookie.value)
      }
    }

You can define Header parameters the same way you define `Query`, `Path` and `Cookie` parameters.

## Import `Header` { #import-header }

First import `Header`:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## Declare `Header` parameters { #declare-header-parameters }

Then declare the header parameters using the same structure as with `Path`, `Query` and `Cookie`.

        Cookie[] cookies = getMockResponse().getCookies();
        boolean found = false;
        for (Cookie cookie : cookies) {
            if ("FESS_SEARCH_PARAM".equals(cookie.getName())) {
                found = true;
                assertNotNull(cookie.getValue());
            }
        }
        assertTrue(found);
        getMockRequest().addCookie(cookies[0]);

        roleQueryHelper.addCookieNameMapping("admin", "administrator");
        roleQueryHelper.addCookieNameMapping("user", "regular_user");

        Cookie adminCookie = new Cookie("admin", "true");
        Cookie userCookie = new Cookie("user", "true");
        Cookie otherCookie = new Cookie("other", "value");
        getMockRequest().addCookie(adminCookie);
        getMockRequest().addCookie(userCookie);