문제상황
개발자 유미님의 SpringSecurity 강의를 듣던 중 문제 발생.
컨트롤러
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class LoginController {
@GetMapping("/login")
public String loginP() {
return "login";
}
}
템플릿 엔진(mustache)
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
login page
<hr>
<form action="/loginProc" method="post" name="loginForm">
<input id="username" type="text" name="username" placeholder="id"/>
<input id="password" type="password" name="password" placeholder="password"/>
<input type="submit" value="login"/>
</form>
</body>
</html>
/login으로 접속을 하면
login 만 출력이 된다.
문제해결
@RestController -> @Controller로 변경하면 제대로 mustache가 렌더링 된다.
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
@Controller
public class LoginController {
@GetMapping("/login")
public String loginP() {
return "login";
}
}
문제원인
@RestController 는 @Controller + @ResponseBody 로 응답이 Http응답으로 직렬화된다.
그래서 템플릿 엔진이 렌더링되지 않고 login 이 그대로 반환됐던 것이다.
참고
RestController (Spring Framework 6.1.13 API)
The value may indicate a suggestion for a logical component name, to be turned into a Spring bean in case of an autodetected component.
docs.spring.io
@ResponseBody :: Spring Framework
@ResponseBody is also supported at the class level, in which case it is inherited by all controller methods. This is the effect of @RestController, which is nothing more than a meta-annotation marked with @Controller and @ResponseBody. @ResponseBody suppor
docs.spring.io
Reactive Core :: Spring Framework
The org.springframework.web.server package builds on the HttpHandler contract to provide a general-purpose web API for processing requests through a chain of multiple WebExceptionHandler, multiple WebFilter, and a single WebHandler component. The chain can
docs.spring.io
(Codecs 파트 참고)
