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154 lines
8.3 KiB
Plaintext
154 lines
8.3 KiB
Plaintext
[[jc-logout]]
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= Handling Logouts
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[[logout-java-configuration]]
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== Logout Java/Kotlin Configuration
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When injecting the `{security-api-url}org/springframework/security/config/annotation/web/builders/HttpSecurity.html[HttpSecurity]` bean, logout capabilities are automatically applied.
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The default is that accessing the URL `/logout` will log the user out by:
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- Invalidating the HTTP Session
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- Cleaning up any RememberMe authentication that was configured
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- Clearing the `SecurityContextHolder`
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- Clearing the `SecurityContextRepository`
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- Redirect to `/login?logout`
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Similar to configuring login capabilities, however, you also have various options to further customize your logout requirements:
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.Logout Configuration
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[tabs]
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======
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Java::
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+
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[source,java,role="primary"]
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----
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public SecurityFilterChain filterChain(HttpSecurity http) {
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http
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.logout(logout -> logout // <1>
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.logoutUrl("/my/logout") // <2>
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.logoutSuccessUrl("/my/index") // <3>
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.logoutSuccessHandler(logoutSuccessHandler) // <4>
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.invalidateHttpSession(true) // <5>
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.addLogoutHandler(logoutHandler) // <6>
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.deleteCookies(cookieNamesToClear) // <7>
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)
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...
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}
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----
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Kotlin::
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+
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[source,kotlin,role="secondary"]
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-----
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open fun filterChain(http: HttpSecurity): SecurityFilterChain {
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http {
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logout { // <1>
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logoutUrl = "/my/logout" // <2>
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logoutSuccessUrl = "/my/index" // <3>
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logoutSuccessHandler = customLogoutSuccessHandler // <4>
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invalidateHttpSession = true // <5>
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addLogoutHandler(logoutHandler) // <6>
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deleteCookies(cookieNamesToClear) // <7>
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}
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}
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// ...
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}
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-----
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======
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<1> Provides logout support.
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<2> The URL that triggers log out to occur (default is `/logout`).
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If CSRF protection is enabled (default), then the request must also be a POST.
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For more information, please consult the {security-api-url}org/springframework/security/config/annotation/web/configurers/LogoutConfigurer.html#logoutUrl-java.lang.String-[Javadoc].
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<3> The URL to redirect to after logout has occurred.
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The default is `/login?logout`.
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For more information, please consult the {security-api-url}org/springframework/security/config/annotation/web/configurers/LogoutConfigurer.html#logoutSuccessUrl-java.lang.String-[Javadoc].
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<4> Let's you specify a custom `LogoutSuccessHandler`.
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If this is specified, `logoutSuccessUrl()` is ignored.
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For more information, please consult the {security-api-url}org/springframework/security/config/annotation/web/configurers/LogoutConfigurer.html#logoutSuccessHandler-org.springframework.security.web.authentication.logout.LogoutSuccessHandler-[Javadoc].
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<5> Specify whether to invalidate the `HttpSession` at the time of logout.
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This is *true* by default.
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Configures the `SecurityContextLogoutHandler` under the covers.
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For more information, please consult the {security-api-url}org/springframework/security/config/annotation/web/configurers/LogoutConfigurer.html#invalidateHttpSession-boolean-[Javadoc].
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<6> Adds a `LogoutHandler`.
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`SecurityContextLogoutHandler` is added as the last `LogoutHandler` by default.
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<7> Allows specifying the names of cookies to be removed on logout success.
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This is a shortcut for adding a `CookieClearingLogoutHandler` explicitly.
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[NOTE]
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====
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Logouts can of course also be configured using the XML Namespace notation.
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Please see the documentation for the xref:servlet/appendix/namespace/http.adoc#nsa-logout[ logout element] in the Spring Security XML Namespace section for further details.
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====
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Generally, in order to customize logout functionality, you can add
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`{security-api-url}org/springframework/security/web/authentication/logout/LogoutHandler.html[LogoutHandler]`
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and/or
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`{security-api-url}org/springframework/security/web/authentication/logout/LogoutSuccessHandler.html[LogoutSuccessHandler]`
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implementations.
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For many common scenarios, these handlers are applied under the
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covers when using the fluent API.
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[[ns-logout]]
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== Logout XML Configuration
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The `logout` element adds support for logging out by navigating to a particular URL.
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The default logout URL is `/logout`, but you can set it to something else using the `logout-url` attribute.
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More information on other available attributes may be found in the namespace appendix.
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[[jc-logout-handler]]
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== LogoutHandler
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Generally, `{security-api-url}org/springframework/security/web/authentication/logout/LogoutHandler.html[LogoutHandler]`
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implementations indicate classes that are able to participate in logout handling.
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They are expected to be invoked to perform necessary clean-up.
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As such they should
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not throw exceptions.
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Various implementations are provided:
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- {security-api-url}org/springframework/security/web/authentication/rememberme/PersistentTokenBasedRememberMeServices.html[PersistentTokenBasedRememberMeServices]
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- {security-api-url}org/springframework/security/web/authentication/rememberme/TokenBasedRememberMeServices.html[TokenBasedRememberMeServices]
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- {security-api-url}org/springframework/security/web/authentication/logout/CookieClearingLogoutHandler.html[CookieClearingLogoutHandler]
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- {security-api-url}org/springframework/security/web/csrf/CsrfLogoutHandler.html[CsrfLogoutHandler]
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- {security-api-url}org/springframework/security/web/authentication/logout/SecurityContextLogoutHandler.html[SecurityContextLogoutHandler]
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- {security-api-url}org/springframework/security/web/authentication/logout/HeaderWriterLogoutHandler.html[HeaderWriterLogoutHandler]
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Please see xref:servlet/authentication/rememberme.adoc#remember-me-impls[Remember-Me Interfaces and Implementations] for details.
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Instead of providing `LogoutHandler` implementations directly, the fluent API also provides shortcuts that provide the respective `LogoutHandler` implementations under the covers.
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E.g. `deleteCookies()` allows specifying the names of one or more cookies to be removed on logout success.
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This is a shortcut compared to adding a `CookieClearingLogoutHandler`.
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[[jc-logout-success-handler]]
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== LogoutSuccessHandler
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The `LogoutSuccessHandler` is called after a successful logout by the `LogoutFilter`, to handle e.g.
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redirection or forwarding to the appropriate destination.
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Note that the interface is almost the same as the `LogoutHandler` but may raise an exception.
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The following implementations are provided:
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- {security-api-url}org/springframework/security/web/authentication/logout/SimpleUrlLogoutSuccessHandler.html[SimpleUrlLogoutSuccessHandler]
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- HttpStatusReturningLogoutSuccessHandler
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As mentioned above, you don't need to specify the `SimpleUrlLogoutSuccessHandler` directly.
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Instead, the fluent API provides a shortcut by setting the `logoutSuccessUrl()`.
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This will setup the `SimpleUrlLogoutSuccessHandler` under the covers.
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The provided URL will be redirected to after a logout has occurred.
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The default is `/login?logout`.
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The `HttpStatusReturningLogoutSuccessHandler` can be interesting in REST API type scenarios.
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Instead of redirecting to a URL upon the successful logout, this `LogoutSuccessHandler` allows you to provide a plain HTTP status code to be returned.
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If not configured a status code 200 will be returned by default.
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[[jc-logout-references]]
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== Further Logout-Related References
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- xref:servlet/authentication/session-management.adoc#properly-clearing-authentication[Properly Clearing Authentication When Explicit Save Is Enabled]
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- <<ns-logout, Logout Handling>>
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- xref:servlet/test/mockmvc/logout.adoc#test-logout[ Testing Logout]
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- xref:servlet/integrations/servlet-api.adoc#servletapi-logout[ HttpServletRequest.logout()]
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- xref:servlet/authentication/rememberme.adoc#remember-me-impls[Remember-Me Interfaces and Implementations]
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- xref:servlet/exploits/csrf.adoc#servlet-considerations-csrf-logout[ Logging Out] in section CSRF Caveats
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- Section xref:servlet/authentication/cas.adoc#cas-singlelogout[ Single Logout] (CAS protocol)
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- Documentation for the xref:servlet/appendix/namespace/http.adoc#nsa-logout[ logout element] in the Spring Security XML Namespace section
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