[feat] jwt 기능 구현 (#1)

build.gradle

@@ -25,6 +25,11 @@ dependencies {
 	compileOnly 'org.projectlombok:lombok'
 	annotationProcessor 'org.projectlombok:lombok'
 	runtimeOnly 'mysql:mysql-connector-java'
+
+	implementation 'io.jsonwebtoken:jjwt-api:0.11.2'
+	runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.11.2'
+	runtimeOnly 'io.jsonwebtoken:jjwt-jackson:0.11.2'
+
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 

src/main/java/com/nadoyagsa/pillaroid/configuration/SecurityConfiguration.java

@@ -0,0 +1,26 @@
+package com.nadoyagsa.pillaroid.configuration;
+
+import com.nadoyagsa.pillaroid.jwt.AuthInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class SecurityConfiguration implements WebMvcConfigurer {
+    private final AuthInterceptor authInterceptor;
+
+    @Autowired
+    public SecurityConfiguration(AuthInterceptor authInterceptor) {
+        this.authInterceptor = authInterceptor;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        //토큰 검사 안하는 경로 설정함(/login/**, 알약 검색 등)
+        //TODO: 알약 검색 시 patterns 사용해서 경로 추가해야 함
+        registry.addInterceptor(authInterceptor)
+                .addPathPatterns("/**")
+                .excludePathPatterns(new String[]{"/login/**"});
+    }
+}

src/main/java/com/nadoyagsa/pillaroid/controller/LoginController.java

@@ -4,6 +4,7 @@
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.nadoyagsa.pillaroid.entity.User;
+import com.nadoyagsa.pillaroid.jwt.AuthTokenProvider;
 import com.nadoyagsa.pillaroid.service.UserService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.*;
@@ -19,10 +20,12 @@
 @RequestMapping(value = "/login")
 public class LoginController {
     private final UserService userService;
+    private final AuthTokenProvider authTokenProvider;
 
     @Autowired
-    public LoginController(UserService userService) {
+    public LoginController(UserService userService, AuthTokenProvider authTokenProvider) {
         this.userService = userService;
+        this.authTokenProvider = authTokenProvider;
     }
 
     // 카카오 로그인 (Input: access token)
@@ -49,7 +52,7 @@ public ResponseEntity<Map<String, Object>> kakaoLogin(@RequestBody Map<String, S
             );
         } catch (Exception e) {     // 카카오로 요청 실패
             response.put("success", false);
-            return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST);              //Status Code=400
+            return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST);              // Status Code=400
         }
 
         ObjectMapper objectMapper = new ObjectMapper();
@@ -59,23 +62,28 @@ public ResponseEntity<Map<String, Object>> kakaoLogin(@RequestBody Map<String, S
             kakaoUserId = userInfo.path("id").asLong();
         } catch (JsonProcessingException e) {
             response.put("success", false);
-            return new ResponseEntity<>(response, HttpStatus.INTERNAL_SERVER_ERROR);    //Status Code=500
+            return new ResponseEntity<>(response, HttpStatus.INTERNAL_SERVER_ERROR);    // Status Code=500
         }
 
+        String authToken = authTokenProvider.createAuthToken(kakaoUserId);
         Optional<User> user = userService.findUserByKakaoAccountId(kakaoUserId);
         // 클라이언트의 로그인 경험 있음
         if (user.isPresent()) {
             response.put("success", true);
-            response.put("user", user);
-            return new ResponseEntity<>(response, HttpStatus.OK);                       //Status Code=200
+            response.put("authToken", authToken);
+            //response.put("user", user);
+            return new ResponseEntity<>(response, HttpStatus.OK);                       // Status Code=200
         }
         // 클라이언트의 로그인 경험 없음(DB에 사용자 추가)
         else {
             User newUser = userService.signUp(new User(kakaoUserId));
 
             response.put("success", true);
-            response.put("user", newUser);
-            return new ResponseEntity<>(response, HttpStatus.CREATED);                  //Status Code=201
+            response.put("authToken", authToken);
+            //response.put("user", newUser);
+            return new ResponseEntity<>(response, HttpStatus.CREATED);                  // Status Code=201
         }
     }
+
+    // 자동로그인은 시각장애인을 위해 프론트에서 authToken값 존재 여부에 따라 수행됨
 }

src/main/java/com/nadoyagsa/pillaroid/jwt/AuthInterceptor.java

@@ -0,0 +1,30 @@
+package com.nadoyagsa.pillaroid.jwt;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+@Component
+public class AuthInterceptor implements HandlerInterceptor {
+    private final AuthTokenProvider authTokenProvider;
+
+    @Autowired
+    public AuthInterceptor(AuthTokenProvider authTokenProvider) {
+        this.authTokenProvider = authTokenProvider;
+    }
+
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
+        String token = request.getHeader("authorization");
+        if (token != null && authTokenProvider.validateToken(token)) {
+            return true;
+        } else {
+            response.setStatus(HttpStatus.UNAUTHORIZED.value());
+            return false;
+        }
+    }
+}

src/main/java/com/nadoyagsa/pillaroid/jwt/AuthTokenProvider.java

@@ -0,0 +1,70 @@
+package com.nadoyagsa.pillaroid.jwt;
+
+import io.jsonwebtoken.*;
+import io.jsonwebtoken.io.Decoders;
+import io.jsonwebtoken.security.Keys;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import java.security.Key;
+import java.util.Date;
+
+@Component
+public class AuthTokenProvider implements InitializingBean {
+    private final Logger logger = LoggerFactory.getLogger(AuthTokenProvider.class);
+
+    private final String secretKey;
+    private Key key;
+
+    public AuthTokenProvider(@Value("${jwt.secret-key}") String secretKey) {
+        this.secretKey = secretKey;
+    }
+
+    @Override
+    public void afterPropertiesSet() {
+        byte[] keyBytes = Decoders.BASE64.decode(secretKey);
+        this.key = Keys.hmacShaKeyFor(keyBytes);
+    }
+
+    // 토큰의 payload에 카카오 회원번호를 삽입
+    public String createAuthToken(Long kakaoAccountId) {
+        return Jwts.builder()
+                .setHeaderParam(Header.TYPE, Header.JWT_TYPE)
+                .setIssuer("pillaroid")
+                .setIssuedAt(new Date())
+                .claim("accountId", kakaoAccountId)
+                .signWith(key, SignatureAlgorithm.HS256)
+                .compact();
+    }
+
+    // 토큰으로부터 payload를 추출하는 메서드
+    public Claims getClaims(String token) {
+        return Jwts.parserBuilder()
+                .setSigningKey(key)
+                .build()
+                .parseClaimsJws(token)
+                .getBody();
+    }
+
+    public boolean validateToken(String token) {
+        try {
+            Jwts.parserBuilder().setSigningKey(key).build().parseClaimsJws(token);
+
+            return true;
+        } catch (io.jsonwebtoken.security.SecurityException | MalformedJwtException e) {
+            logger.info("잘못된 JWT 서명입니다.");
+        } catch (ExpiredJwtException e) {
+            logger.info("만료된 JWT 토큰입니다.");
+        } catch (UnsupportedJwtException e) {
+            logger.info("지원되지 않는 JWT 토큰입니다.");
+        } catch (IllegalArgumentException e) {
+            logger.info("JWT 토큰이 잘못되었습니다.");
+        } catch (Exception e) {
+            logger.info("서비스에 접근할 수 없는 토큰입니다.");
+        }
+        return false;
+    }
+}