Remove constructor in OAuth2AuthorizationServerMetadataEndpointFilter

Closes gh-868

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/config/annotation/web/configurers/OAuth2AuthorizationServerConfigurer.java

@@ -255,7 +255,7 @@ public final class OAuth2AuthorizationServerConfigurer
 		}
 
 		OAuth2AuthorizationServerMetadataEndpointFilter authorizationServerMetadataEndpointFilter =
-				new OAuth2AuthorizationServerMetadataEndpointFilter(authorizationServerSettings);
+				new OAuth2AuthorizationServerMetadataEndpointFilter();
 		httpSecurity.addFilterBefore(postProcess(authorizationServerMetadataEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
 	}
 

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2AuthorizationServerMetadataEndpointFilter.java

@@ -31,12 +31,12 @@ import org.springframework.security.oauth2.core.AuthorizationGrantType;
 import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
 import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationServerMetadata;
+import org.springframework.security.oauth2.server.authorization.context.AuthorizationServerContext;
 import org.springframework.security.oauth2.server.authorization.context.AuthorizationServerContextHolder;
 import org.springframework.security.oauth2.server.authorization.http.converter.OAuth2AuthorizationServerMetadataHttpMessageConverter;
 import org.springframework.security.oauth2.server.authorization.settings.AuthorizationServerSettings;
 import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
 import org.springframework.security.web.util.matcher.RequestMatcher;
-import org.springframework.util.Assert;
 import org.springframework.web.filter.OncePerRequestFilter;
 import org.springframework.web.util.UriComponentsBuilder;
 
@@ -55,20 +55,12 @@ public final class OAuth2AuthorizationServerMetadataEndpointFilter extends OnceP
 	 */
 	private static final String DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI = "/.well-known/oauth-authorization-server";
 
-	private final AuthorizationServerSettings authorizationServerSettings;
-	private final RequestMatcher requestMatcher;
+	private final RequestMatcher requestMatcher = new AntPathRequestMatcher(
+			DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI,
+			HttpMethod.GET.name());
 	private final OAuth2AuthorizationServerMetadataHttpMessageConverter authorizationServerMetadataHttpMessageConverter =
 			new OAuth2AuthorizationServerMetadataHttpMessageConverter();
 
-	public OAuth2AuthorizationServerMetadataEndpointFilter(AuthorizationServerSettings authorizationServerSettings) {
-		Assert.notNull(authorizationServerSettings, "authorizationServerSettings cannot be null");
-		this.authorizationServerSettings = authorizationServerSettings;
-		this.requestMatcher = new AntPathRequestMatcher(
-				DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI,
-				HttpMethod.GET.name()
-		);
-	}
-
 	@Override
 	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
 			throws ServletException, IOException {
@@ -78,21 +70,23 @@ public final class OAuth2AuthorizationServerMetadataEndpointFilter extends OnceP
 			return;
 		}
 
-		String issuer = AuthorizationServerContextHolder.getContext().getIssuer();
+		AuthorizationServerContext authorizationServerContext = AuthorizationServerContextHolder.getContext();
+		String issuer = authorizationServerContext.getIssuer();
+		AuthorizationServerSettings authorizationServerSettings = authorizationServerContext.getAuthorizationServerSettings();
 
 		OAuth2AuthorizationServerMetadata authorizationServerMetadata = OAuth2AuthorizationServerMetadata.builder()
 				.issuer(issuer)
-				.authorizationEndpoint(asUrl(issuer, this.authorizationServerSettings.getAuthorizationEndpoint()))
-				.tokenEndpoint(asUrl(issuer, this.authorizationServerSettings.getTokenEndpoint()))
+				.authorizationEndpoint(asUrl(issuer, authorizationServerSettings.getAuthorizationEndpoint()))
+				.tokenEndpoint(asUrl(issuer, authorizationServerSettings.getTokenEndpoint()))
 				.tokenEndpointAuthenticationMethods(clientAuthenticationMethods())
-				.jwkSetUrl(asUrl(issuer, this.authorizationServerSettings.getJwkSetEndpoint()))
+				.jwkSetUrl(asUrl(issuer, authorizationServerSettings.getJwkSetEndpoint()))
 				.responseType(OAuth2AuthorizationResponseType.CODE.getValue())
 				.grantType(AuthorizationGrantType.AUTHORIZATION_CODE.getValue())
 				.grantType(AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
 				.grantType(AuthorizationGrantType.REFRESH_TOKEN.getValue())
-				.tokenRevocationEndpoint(asUrl(issuer, this.authorizationServerSettings.getTokenRevocationEndpoint()))
+				.tokenRevocationEndpoint(asUrl(issuer, authorizationServerSettings.getTokenRevocationEndpoint()))
 				.tokenRevocationEndpointAuthenticationMethods(clientAuthenticationMethods())
-				.tokenIntrospectionEndpoint(asUrl(issuer, this.authorizationServerSettings.getTokenIntrospectionEndpoint()))
+				.tokenIntrospectionEndpoint(asUrl(issuer, authorizationServerSettings.getTokenIntrospectionEndpoint()))
 				.tokenIntrospectionEndpointAuthenticationMethods(clientAuthenticationMethods())
 				.codeChallengeMethod("S256")
 				.build();

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/web/OAuth2AuthorizationServerMetadataEndpointFilterTests.java

@@ -49,17 +49,13 @@ public class OAuth2AuthorizationServerMetadataEndpointFilterTests {
 		AuthorizationServerContextHolder.resetContext();
 	}
 
-	@Test
-	public void constructorWhenAuthorizationServerSettingsNullThenThrowIllegalArgumentException() {
-		assertThatIllegalArgumentException()
-				.isThrownBy(() -> new OAuth2AuthorizationServerMetadataEndpointFilter(null))
-				.withMessage("authorizationServerSettings cannot be null");
-	}
-
 	@Test
 	public void doFilterWhenNotAuthorizationServerMetadataRequestThenNotProcessed() throws Exception {
-		OAuth2AuthorizationServerMetadataEndpointFilter filter =
-				new OAuth2AuthorizationServerMetadataEndpointFilter(AuthorizationServerSettings.builder().issuer("https://example.com").build());
+		AuthorizationServerSettings authorizationServerSettings = AuthorizationServerSettings.builder()
+				.issuer("https://example.com")
+				.build();
+		AuthorizationServerContextHolder.setContext(new TestAuthorizationServerContext(authorizationServerSettings, null));
+		OAuth2AuthorizationServerMetadataEndpointFilter filter = new OAuth2AuthorizationServerMetadataEndpointFilter();
 
 		String requestUri = "/path";
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", requestUri);
@@ -74,8 +70,11 @@ public class OAuth2AuthorizationServerMetadataEndpointFilterTests {
 
 	@Test
 	public void doFilterWhenAuthorizationServerMetadataRequestPostThenNotProcessed() throws Exception {
-		OAuth2AuthorizationServerMetadataEndpointFilter filter =
-				new OAuth2AuthorizationServerMetadataEndpointFilter(AuthorizationServerSettings.builder().issuer("https://example.com").build());
+		AuthorizationServerSettings authorizationServerSettings = AuthorizationServerSettings.builder()
+				.issuer("https://example.com")
+				.build();
+		AuthorizationServerContextHolder.setContext(new TestAuthorizationServerContext(authorizationServerSettings, null));
+		OAuth2AuthorizationServerMetadataEndpointFilter filter = new OAuth2AuthorizationServerMetadataEndpointFilter();
 
 		String requestUri = DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI;
 		MockHttpServletRequest request = new MockHttpServletRequest("POST", requestUri);
@@ -106,8 +105,7 @@ public class OAuth2AuthorizationServerMetadataEndpointFilterTests {
 				.tokenIntrospectionEndpoint(tokenIntrospectionEndpoint)
 				.build();
 		AuthorizationServerContextHolder.setContext(new TestAuthorizationServerContext(authorizationServerSettings, null));
-		OAuth2AuthorizationServerMetadataEndpointFilter filter =
-				new OAuth2AuthorizationServerMetadataEndpointFilter(authorizationServerSettings);
+		OAuth2AuthorizationServerMetadataEndpointFilter filter = new OAuth2AuthorizationServerMetadataEndpointFilter();
 
 		String requestUri = DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI;
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", requestUri);
@@ -141,8 +139,7 @@ public class OAuth2AuthorizationServerMetadataEndpointFilterTests {
 				.issuer("https://this is an invalid URL")
 				.build();
 		AuthorizationServerContextHolder.setContext(new TestAuthorizationServerContext(authorizationServerSettings, null));
-		OAuth2AuthorizationServerMetadataEndpointFilter filter =
-				new OAuth2AuthorizationServerMetadataEndpointFilter(authorizationServerSettings);
+		OAuth2AuthorizationServerMetadataEndpointFilter filter = new OAuth2AuthorizationServerMetadataEndpointFilter();
 
 		String requestUri = DEFAULT_OAUTH2_AUTHORIZATION_SERVER_METADATA_ENDPOINT_URI;
 		MockHttpServletRequest request = new MockHttpServletRequest("GET", requestUri);