https://github.com/codingspecialist/Springboot-Controller-High.git
📕 자바스크립트 응답
package shop.mtcoding.filterandhandler.util;
public class Script {
public static String href(String uri){
String sc = "";
sc += "<script>";
sc += "location.href='"+uri+"';";
sc += "</script>";
return sc;
}
public static String href(String uri, String msg){
String sc = "";
sc += "<script>";
sc += "alert('"+msg+"');";
sc += "location.href='"+uri+"';";
sc += "</script>";
return sc;
}
public static String back(String msg){
String sc = "";
sc += "<script>";
sc += "alert('"+msg+"');";
sc += "history.back();";
sc += "</script>";
return sc;
}
}📕 Fetch 요청
<!doctype html>
<html lang="en">
<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>
<h1>회원가입 페이지</h1>
<hr/>
<form>
<input type="text" id="username"/> <br/>
<input type="password" id="password"/><br/>
<input type="tel" id="tel"/> <br/>
<button type="button" onclick="join()">회원가입</button>
</form>
<script>
async function join() {
// this란 : https://www.youtube.com/watch?v=tDZROpAdJ9w
// this.event.preventDefault(); // form 태그 액션을 실행하지마!!
let requestBody = {
username: document.querySelector("#username").value,
password: document.querySelector("#password").value,
tel: document.querySelector("#tel").value,
};
//console.log(requestBody);
//console.log(JSON.stringify(requestBody));
try {
let response = await fetch("/join/v2", {
method: "post",
body: JSON.stringify(requestBody),
headers: {
"Content-Type": "application/json; charset=utf-8"
}
});
let responseBody = await response.json();
if (!response.ok) {
throw new Error(responseBody.msg);
}
console.log(responseBody.data);
alert(responseBody.msg);
location.href = "/home";
} catch (err) {
alert(err);
//console.error(err);
}
}
</script>
</body>
</html>📕 예외처리
package shop.mtcoding.filterandhandler.handler.ex;
import lombok.Getter;
import lombok.Setter;
import org.springframework.http.HttpStatus;
@Getter @Setter
public class ControllerException extends RuntimeException{
private HttpStatus httpStatus;
public ControllerException(String msg) {
this(msg, HttpStatus.BAD_REQUEST);
}
public ControllerException(String msg, HttpStatus httpStatus) {
super(msg);
this.httpStatus = httpStatus;
}
}package shop.mtcoding.filterandhandler.handler.ex;
import lombok.Getter;
import lombok.Setter;
import org.springframework.http.HttpStatus;
@Getter @Setter
public class RestControllerException extends RuntimeException{
private HttpStatus httpStatus;
public RestControllerException(String msg) {
this(msg, HttpStatus.BAD_REQUEST);
}
public RestControllerException(String msg, HttpStatus httpStatus) {
super(msg);
this.httpStatus = httpStatus;
}
}package shop.mtcoding.filterandhandler.handler;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import shop.mtcoding.filterandhandler.dto.ResponseDto;
import shop.mtcoding.filterandhandler.handler.ex.RestControllerException;
import shop.mtcoding.filterandhandler.handler.ex.ControllerException;
import shop.mtcoding.filterandhandler.util.Script;
// RestController -> Data 줘
// Controller -> View줘 text/html 줘
@RestControllerAdvice
public class ExHandler {
@ExceptionHandler(ControllerException.class)
public String controllerException(ControllerException e){
return Script.back(e.getMessage());
}
@ExceptionHandler(RestControllerException.class)
public ResponseEntity<?> restControllerException(RestControllerException e){
ResponseDto<?> responseDto = new ResponseDto<>(e.getMessage());
return new ResponseEntity<>(responseDto, HttpStatus.BAD_REQUEST);
}
}throw new ControllerException("username을 입력해주세요");throw new RestControllerException("username을 입력해주세요");📕 필터
필터 생성
package shop.mtcoding.filterandhandler.filter;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.*;
import java.io.BufferedReader;
import java.io.IOException;
public class BlackListFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// x-www-form-urlencoded -> username=ssar
String username = request.getParameter("username");
if(username.equals("ssar")){
// DS보다 먼저 작동한다.
response.setContentType("text/plain; charset=utf-8");
response.getWriter().println("당신은 블랙리스트입니다.");
return;
}
chain.doFilter(request, response);
}
}필터등록
package shop.mtcoding.filterandhandler.config;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import shop.mtcoding.filterandhandler.filter.BlackListFilter;
@Configuration
public class FilterRegister {
@Bean
public FilterRegistrationBean<?> myFilterRegistration() {
FilterRegistrationBean<BlackListFilter> registration = new FilterRegistrationBean<>();
registration.setFilter(new BlackListFilter());
registration.addUrlPatterns("/login/*");
registration.setOrder(1); // 필터 순서 설정
return registration;
}
}📕 인터셉터
인터셉터 생성
package shop.mtcoding.filterandhandler.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("preHandle 실행됨");
return false;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("postHandle 실행됨");
}
}
인터셉터 등록
package shop.mtcoding.filterandhandler.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import shop.mtcoding.filterandhandler.interceptor.LoginInterceptor;
@Configuration // new 가 됨
public class WebConfig implements WebMvcConfigurer {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/login/*");
}
}
블로그 이전 : https://medium.com/@jaegeunsong97