[keycloak-spi] add refresh token endpoint (#66)

Co-authored-by: Erhan Varlik <erhan.varlik@tum.de>

Author: erhanvarlik

server/keycloak/src/main/java/com/recipefy/keycloak/controller/AuthController.java

@@ -19,7 +19,7 @@ public class AuthController {
     private final KeycloakService keycloakService;
 
     @PostMapping("/login")
-    public Mono<LoginResponse> login(@Valid @RequestBody LoginRequest request) {
+    public Mono<TokenResponse> login(@Valid @RequestBody LoginRequest request) {
         return keycloakService.login(request);
     }
 
@@ -36,4 +36,9 @@ public Mono<UserInfoResponse> userInfo(@RequestHeader(HttpHeaders.AUTHORIZATION)
         String token = authorization.substring(7);
         return keycloakService.userInfo(token);
     }
+
+    @PostMapping("/refresh")
+    public Mono<TokenResponse> refreshToken(@Valid @RequestBody RefreshTokenRequest request) {
+        return keycloakService.refreshToken(request);
+    }
 }

server/keycloak/src/main/java/com/recipefy/keycloak/model/LoginResponse.java

@@ -0,0 +1,11 @@
+package com.recipefy.keycloak.model;
+
+import jakarta.validation.constraints.Email;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Data;
+
+@Data
+public class RefreshTokenRequest {
+    @NotBlank
+    private String token;
+}

server/keycloak/src/main/java/com/recipefy/keycloak/model/RefreshTokenRequest.java

@@ -10,7 +10,7 @@ public class TokenResponse {
     private String accessToken;
     private String refreshToken;
     private long expiresIn;
-    private Long refreshExpiresIn;
+    private long refreshExpiresIn;
     private String tokenType;
     private String scope;
 }

server/keycloak/src/main/java/com/recipefy/keycloak/model/TokenResponse.java

@@ -21,7 +21,7 @@ public class KeycloakService {
     private final WebClient keycloakClient;
     private final WebClient keycloakAdminClient;
 
-    public Mono<LoginResponse> login(LoginRequest request) {
+    public Mono<TokenResponse> login(LoginRequest request) {
         MultiValueMap<String, String> body = new LinkedMultiValueMap<>();
         body.add("grant_type", "password");
         body.add("client_id", properties.getCredentials().getRecipefy().getClientId());
@@ -34,7 +34,7 @@ public Mono<LoginResponse> login(LoginRequest request) {
                 .uri(properties.getKeycloakUri() + "/token")
                 .bodyValue(body)
                 .retrieve()
-                .bodyToMono(LoginResponse.class);
+                .bodyToMono(TokenResponse.class);
     }
 
     public Mono<ResponseEntity<Void>> register(RegisterRequest request) {
@@ -66,6 +66,19 @@ public Mono<UserInfoResponse> userInfo(String token) {
                 .headers(header-> header.setBearerAuth(token))
                 .retrieve()
                 .bodyToMono(UserInfoResponse.class);
+    }
+
+    public Mono<TokenResponse> refreshToken(RefreshTokenRequest request) {
+        MultiValueMap<String, String> body = new LinkedMultiValueMap<>();
+        body.add("grant_type", "refresh_token");
+        body.add("client_id", properties.getCredentials().getRecipefy().getClientId());
+        body.add("client_secret", properties.getCredentials().getRecipefy().getClientSecret());
+        body.add("refresh_token", request.getToken());
 
+        return keycloakClient.post()
+                .uri(properties.getKeycloakUri() + "/token")
+                .bodyValue(body)
+                .retrieve()
+                .bodyToMono(TokenResponse.class);
     }
 }