[fix]: 액세스 토큰 발급 요청 수정

src/main/java/com/onnoff/onnoff/auth/feignClient/client/AppleAuthClient.java

@@ -6,14 +6,18 @@
 import org.springframework.cloud.openfeign.FeignClient;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
+import java.util.Map;
 
 @FeignClient(name = "apple-auth-client",url = "https://appleid.apple.com/auth")
 public interface AppleAuthClient{
     @GetMapping("/keys")
     JwkResponse.JwkSet getKeys();
 
-    @GetMapping(value = "/token", consumes = "application/x-www-form-urlencoded")
-    TokenResponse getToken(MultiValueMap requestBody);
+    @PostMapping(value = "/token", consumes = "application/x-www-form-urlencoded")
+    TokenResponse getToken(@RequestBody Map<String, ?> requestBody);
 
     //회원 탈퇴 메서드
 //    @GetMapping("/revoke")

src/main/java/com/onnoff/onnoff/auth/feignClient/config/FeignConfig.java

@@ -2,14 +2,23 @@
 
 
 import com.onnoff.onnoff.auth.feignClient.CustomErrorDecoder;
+import feign.codec.Encoder;
 import feign.codec.ErrorDecoder;
+import feign.form.spring.SpringFormEncoder;
+import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
+import org.springframework.cloud.openfeign.support.SpringEncoder;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
 
 @Configuration
 public class FeignConfig {
     @Bean
     public ErrorDecoder errorDecoder(){
         return new CustomErrorDecoder();
     }
+    @Bean
+    public Encoder multipartFormEncoder() {
+        return new SpringFormEncoder(new SpringEncoder(() -> new HttpMessageConverters(new RestTemplate().getMessageConverters())));
+    }
 }

src/main/java/com/onnoff/onnoff/auth/service/AppleLoginService.java

@@ -9,14 +9,12 @@
 import com.onnoff.onnoff.domain.user.User;
 import com.onnoff.onnoff.domain.user.enums.SocialType;
 import io.jsonwebtoken.Jwts;
-import io.jsonwebtoken.SignatureAlgorithm;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
 import org.bouncycastle.openssl.PEMParser;
 import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.core.io.ClassPathResource;
 import org.springframework.stereotype.Service;
 import org.springframework.util.MultiValueMap;
 
@@ -52,6 +50,7 @@ public class AppleLoginService implements LoginService{
     public TokenResponse getAccessTokenByCode(String code) {
         // client secret 만들기
         String clientSecret = createClientSecret();
+        log.info("clientSecret = {}", clientSecret);
         // 요청
         MultiValueMap<String, String> urlEncoded = TokenRequest.builder()
                 .clientId(clientId)
@@ -63,21 +62,23 @@ public TokenResponse getAccessTokenByCode(String code) {
     }
     private String createClientSecret() {
         Date expirationDate = Date.from(LocalDateTime.now().plusDays(30).atZone(ZoneId.systemDefault()).toInstant());
-        Map<String, Object> jwtHeader = new HashMap<>();
-        jwtHeader.put("kid", kid);
-        jwtHeader.put("alg", "ES256");
 
         try {
             log.info("teamId = {}", teamId);
             log.info("kid = {}", kid);
             return Jwts.builder()
-                    .setHeaderParams(jwtHeader)
-                    .setIssuer(teamId) // 토큰 발행자 = 우리 팀
-                    .setIssuedAt(new Date(System.currentTimeMillis())) // 발행 시간 - UNIX 시간
-                    .setExpiration(expirationDate) // 만료 시간
-                    .setAudience(iss)  // 애플이 수신자
-                    .setSubject(clientId) // 토큰의 주체 = 우리 앱
-                    .signWith(SignatureAlgorithm.ES256, getPrivateKey())
+                    .header()
+                    .keyId(kid)
+                    .add("alg", "ES256")
+                    .and()
+                    .subject(clientId) // 토큰의 주체 = 우리 앱
+                    .issuer(teamId)
+                    .issuedAt(new Date(System.currentTimeMillis()))
+                    .expiration(expirationDate) // 만료 시간
+                    .audience()
+                    .add(iss)
+                    .and()
+                    .signWith(getPrivateKey(), Jwts.SIG.ES256)
                     .compact();
         } catch (IOException e) {
             throw new RuntimeException(e);