fix: OAuth 콜백 파라미터로 리다이렉트 위치를 지정하도록 수정

src/main/java/com/gdschongik/gdsc/global/common/constant/SecurityConstant.java

@@ -8,6 +8,7 @@ public class SecurityConstant {
     public static final String GITHUB_NAME_ATTR_KEY = "id";
     public static final String ACCESS_TOKEN_HEADER_PREFIX = "Bearer ";
     public static final String OAUTH_REDIRECT_PATH_SEGMENT = "/social-login/redirect";
+    public static final String OAUTH_TARGET_URL_PARAM_NAME = "target";
 
     private SecurityConstant() {}
 }

src/main/java/com/gdschongik/gdsc/global/config/WebSecurityConfig.java

@@ -11,6 +11,7 @@
 import com.gdschongik.gdsc.domain.member.dao.MemberRepository;
 import com.gdschongik.gdsc.global.annotation.ConditionalOnProfile;
 import com.gdschongik.gdsc.global.property.BasicAuthProperty;
+import com.gdschongik.gdsc.global.security.CustomOAuth2AuthorizationRequestResolver;
 import com.gdschongik.gdsc.global.security.CustomSuccessHandler;
 import com.gdschongik.gdsc.global.security.CustomUserService;
 import com.gdschongik.gdsc.global.security.JwtExceptionFilter;
@@ -31,6 +32,7 @@
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
 import org.springframework.security.provisioning.InMemoryUserDetailsManager;
 import org.springframework.security.web.SecurityFilterChain;
 import org.springframework.security.web.authentication.logout.LogoutFilter;
@@ -49,6 +51,7 @@ public class WebSecurityConfig {
     private final ObjectMapper objectMapper;
     private final EnvironmentUtil environmentUtil;
     private final BasicAuthProperty basicAuthProperty;
+    private final ClientRegistrationRepository clientRegistrationRepository;
 
     private void defaultFilterChain(HttpSecurity http) throws Exception {
         http.httpBasic(AbstractHttpConfigurer::disable)
@@ -94,10 +97,11 @@ public SecurityFilterChain prometheusFilterChain(HttpSecurity http) throws Excep
     public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
         defaultFilterChain(http);
 
-        http.oauth2Login(
-                oauth2 -> oauth2.userInfoEndpoint(userInfo -> userInfo.userService(customUserService(memberRepository)))
-                        .successHandler(customSuccessHandler(jwtService, cookieUtil))
-                        .failureHandler((request, response, exception) -> response.setStatus(401)));
+        http.oauth2Login(oauth2 -> oauth2.authorizationEndpoint(
+                        endpoint -> endpoint.authorizationRequestResolver(customOAuth2AuthorizationRequestResolver()))
+                .userInfoEndpoint(userInfo -> userInfo.userService(customUserService(memberRepository)))
+                .successHandler(customSuccessHandler(jwtService, cookieUtil))
+                .failureHandler((request, response, exception) -> response.setStatus(401)));
 
         http.exceptionHandling(exception ->
                 exception.authenticationEntryPoint((request, response, authException) -> response.setStatus(401)));
@@ -140,6 +144,11 @@ public PasswordEncoder passwordEncoder() {
         return new BCryptPasswordEncoder();
     }
 
+    @Bean
+    public CustomOAuth2AuthorizationRequestResolver customOAuth2AuthorizationRequestResolver() {
+        return new CustomOAuth2AuthorizationRequestResolver(clientRegistrationRepository);
+    }
+
     @Bean
     public CustomUserService customUserService(MemberRepository memberRepository) {
         return new CustomUserService(memberRepository);

src/main/java/com/gdschongik/gdsc/global/security/CustomOAuth2AuthorizationRequestResolver.java

@@ -0,0 +1,49 @@
+package com.gdschongik.gdsc.global.security;
+
+import static com.gdschongik.gdsc.global.common.constant.SecurityConstant.*;
+
+import jakarta.servlet.http.HttpServletRequest;
+import java.util.HashMap;
+import java.util.Map;
+import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
+import org.springframework.security.oauth2.client.web.DefaultOAuth2AuthorizationRequestResolver;
+import org.springframework.security.oauth2.client.web.OAuth2AuthorizationRequestResolver;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationRequest;
+
+public class CustomOAuth2AuthorizationRequestResolver implements OAuth2AuthorizationRequestResolver {
+
+    private final DefaultOAuth2AuthorizationRequestResolver delegate;
+
+    public CustomOAuth2AuthorizationRequestResolver(ClientRegistrationRepository clientRegistrationRepository) {
+        this.delegate =
+                new DefaultOAuth2AuthorizationRequestResolver(clientRegistrationRepository, "/oauth2/authorization");
+    }
+
+    @Override
+    public OAuth2AuthorizationRequest resolve(HttpServletRequest request) {
+        OAuth2AuthorizationRequest authorizationRequest = delegate.resolve(request);
+        return authorizationRequest != null ? customizeAuthorizationRequest(request, authorizationRequest) : null;
+    }
+
+    @Override
+    public OAuth2AuthorizationRequest resolve(HttpServletRequest request, String clientRegistrationId) {
+        OAuth2AuthorizationRequest authorizationRequest = delegate.resolve(request, clientRegistrationId);
+        return authorizationRequest != null ? customizeAuthorizationRequest(request, authorizationRequest) : null;
+    }
+
+    private OAuth2AuthorizationRequest customizeAuthorizationRequest(
+            HttpServletRequest request, OAuth2AuthorizationRequest authorizationRequest) {
+
+        String referer = request.getHeader("Referer");
+        if (referer == null || referer.isEmpty()) {
+            return authorizationRequest;
+        }
+
+        Map<String, Object> additionalParameters = new HashMap<>();
+        additionalParameters.put(OAUTH_TARGET_URL_PARAM_NAME, referer);
+
+        return OAuth2AuthorizationRequest.from(authorizationRequest)
+                .additionalParameters(additionalParameters)
+                .build();
+    }
+}

src/main/java/com/gdschongik/gdsc/global/security/CustomSuccessHandler.java

@@ -24,7 +24,7 @@ public class CustomSuccessHandler extends SimpleUrlAuthenticationSuccessHandler
     public CustomSuccessHandler(JwtService jwtService, CookieUtil cookieUtil) {
         this.jwtService = jwtService;
         this.cookieUtil = cookieUtil;
-        setUseReferer(true);
+        setTargetUrlParameter(OAUTH_TARGET_URL_PARAM_NAME);
     }
 
     @Override