Add Support OAuth2AuthorizationRequestResolver As Bean

Closes gh-16380

Author: franticticktick

Diff for: config/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,6 +68,7 @@
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserService;
 import org.springframework.security.oauth2.client.web.AuthenticatedPrincipalOAuth2AuthorizedClientRepository;
 import org.springframework.security.oauth2.client.web.AuthorizationRequestRepository;
+import org.springframework.security.oauth2.client.web.DefaultOAuth2AuthorizationRequestResolver;
 import org.springframework.security.oauth2.client.web.OAuth2AuthorizationRequestRedirectFilter;
 import org.springframework.security.oauth2.client.web.OAuth2AuthorizationRequestResolver;
 import org.springframework.security.oauth2.client.web.OAuth2AuthorizedClientRepository;
@@ -396,20 +397,8 @@ public void init(B http) throws Exception {
 
 	@Override
 	public void configure(B http) throws Exception {
-		OAuth2AuthorizationRequestRedirectFilter authorizationRequestFilter;
-		if (this.authorizationEndpointConfig.authorizationRequestResolver != null) {
-			authorizationRequestFilter = new OAuth2AuthorizationRequestRedirectFilter(
-					this.authorizationEndpointConfig.authorizationRequestResolver);
-		}
-		else {
-			String authorizationRequestBaseUri = this.authorizationEndpointConfig.authorizationRequestBaseUri;
-			if (authorizationRequestBaseUri == null) {
-				authorizationRequestBaseUri = OAuth2AuthorizationRequestRedirectFilter.DEFAULT_AUTHORIZATION_REQUEST_BASE_URI;
-			}
-			authorizationRequestFilter = new OAuth2AuthorizationRequestRedirectFilter(
-					OAuth2ClientConfigurerUtils.getClientRegistrationRepository(this.getBuilder()),
-					authorizationRequestBaseUri);
-		}
+		OAuth2AuthorizationRequestRedirectFilter authorizationRequestFilter = new OAuth2AuthorizationRequestRedirectFilter(
+				getAuthorizationRequestResolver());
 		if (this.authorizationEndpointConfig.authorizationRequestRepository != null) {
 			authorizationRequestFilter
 				.setAuthorizationRequestRepository(this.authorizationEndpointConfig.authorizationRequestRepository);
@@ -435,6 +424,22 @@ public void configure(B http) throws Exception {
 		super.configure(http);
 	}
 
+	private OAuth2AuthorizationRequestResolver getAuthorizationRequestResolver() {
+		if (this.authorizationEndpointConfig.authorizationRequestResolver != null) {
+			return this.authorizationEndpointConfig.authorizationRequestResolver;
+		}
+		ClientRegistrationRepository clientRegistrationRepository = OAuth2ClientConfigurerUtils
+			.getClientRegistrationRepository(getBuilder());
+		ResolvableType resolvableType = ResolvableType.forClass(OAuth2AuthorizationRequestResolver.class);
+		OAuth2AuthorizationRequestResolver bean = getBeanOrNull(resolvableType);
+		String authorizationRequestBaseUri = this.authorizationEndpointConfig.authorizationRequestBaseUri;
+		if (authorizationRequestBaseUri == null) {
+			authorizationRequestBaseUri = OAuth2AuthorizationRequestRedirectFilter.DEFAULT_AUTHORIZATION_REQUEST_BASE_URI;
+		}
+		return (bean != null) ? bean : new DefaultOAuth2AuthorizationRequestResolver(clientRegistrationRepository,
+				authorizationRequestBaseUri);
+	}
+
 	@Override
 	protected RequestMatcher createLoginProcessingUrlMatcher(String loginProcessingUrl) {
 		return new AntPathRequestMatcher(loginProcessingUrl);

Diff for: config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -355,7 +355,19 @@ public void oauth2LoginConfigLoginProcessingUrl() throws Exception {
 			.hasToString("OAUTH2_USER");
 	}
 
-	// gh-5521
+	@Test
+	public void oauth2LoginWithCustomAuthorizationRequestParametersAndResolverAsBean() throws Exception {
+		loadConfig(OAuth2LoginConfigCustomAuthorizationRequestResolverBean.class);
+		// @formatter:off
+		// @formatter:on
+		String requestUri = "/oauth2/authorization/google";
+		this.request = new MockHttpServletRequest("GET", requestUri);
+		this.request.setServletPath(requestUri);
+		this.springSecurityFilterChain.doFilter(this.request, this.response, this.filterChain);
+		assertThat(this.response.getRedirectedUrl()).isEqualTo(
+				"https://accounts.google.com/o/oauth2/v2/auth?response_type=code&client_id=clientId&scope=openid+profile+email&state=state&redirect_uri=http%3A%2F%2Flocalhost%2Flogin%2Foauth2%2Fcode%2Fgoogle&custom-param1=custom-value1");
+	}
+
 	@Test
 	public void oauth2LoginWithCustomAuthorizationRequestParameters() throws Exception {
 		loadConfig(OAuth2LoginConfigCustomAuthorizationRequestResolver.class);
@@ -940,6 +952,42 @@ SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
 
 	}
 
+	@Configuration
+	@EnableWebSecurity
+	static class OAuth2LoginConfigCustomAuthorizationRequestResolverBean extends CommonSecurityFilterChainConfig {
+
+		private ClientRegistrationRepository clientRegistrationRepository = new InMemoryClientRegistrationRepository(
+				GOOGLE_CLIENT_REGISTRATION);
+
+		@Bean
+		SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+			// @formatter:off
+			http
+					.oauth2Login()
+					.clientRegistrationRepository(this.clientRegistrationRepository)
+					.authorizationEndpoint();
+			// @formatter:on
+			return super.configureFilterChain(http);
+		}
+
+		@Bean
+		OAuth2AuthorizationRequestResolver resolver() {
+			OAuth2AuthorizationRequestResolver resolver = mock(OAuth2AuthorizationRequestResolver.class);
+			// @formatter:off
+			OAuth2AuthorizationRequest result = OAuth2AuthorizationRequest.authorizationCode()
+					.authorizationUri("https://accounts.google.com/authorize")
+					.clientId("client-id")
+					.state("adsfa")
+					.authorizationRequestUri(
+							"https://accounts.google.com/o/oauth2/v2/auth?response_type=code&client_id=clientId&scope=openid+profile+email&state=state&redirect_uri=http%3A%2F%2Flocalhost%2Flogin%2Foauth2%2Fcode%2Fgoogle&custom-param1=custom-value1")
+					.build();
+			given(resolver.resolve(any())).willReturn(result);
+			// @formatter:on
+			return resolver;
+		}
+
+	}
+
 	@Configuration
 	@EnableWebSecurity
 	static class OAuth2LoginConfigCustomAuthorizationRequestResolverInLambda