EP3. 서블릿객체만을 이용해 HTTP 응답 메시지 작성하기

• 상태코드
• 헤더세팅
  - content
  - cookie
  - redirect

 

 

상태코드

        response.setStatus(HttpServletResponse.SC_OK);

 

 

 

헤더세팅

        response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("my-header", "hello");

 

헤더 세팅시 편의 메서드

 

content

    private void content(HttpServletResponse response) {
        //Content-Type: text/plain;charset=utf-8
        //Content-Length: 2
        //response.setHeader("Content-Type", "text/plain;charset=utf-8");
        response.setContentType("text/plain");
        response.setCharacterEncoding("utf-8");
        //response.setContentLength(2); //(생략시 자동 생성)
    }

 

cookie

    private void cookie(HttpServletResponse response) {
//        Set-Cookie: myCookie=good; Max-Age=600;
//         response.setHeader("Set-Cookie", "myCookie=good; Max-Age=600");
        Cookie cookie = new Cookie("myCookie", "good");
        cookie.setMaxAge(600); //600초
        response.addCookie(cookie);
    }

 

redirect

    private void redirect(HttpServletResponse response) throws IOException {
        //Status Code 302
        //Location: /basic/hello-form.html

//        response.setStatus(HttpServletResponse.SC_FOUND); //302
//        response.setHeader("Location", "/basic/hello-form.html");
        response.sendRedirect("/basic/hello-form.html");
    }