Keycloak 1.4.0.Final 发布，值得关注的更新如下： Authentication and Required Actions SPI - We've create SPIs for authentication flows and required actions and made existing flows pluggable. Currently the flows are hard-coded, but can be configured to some extent. In the future we'll make it possible to define your own authentication flows, authenticators as well as required actions. Service account - We've added support for clients to obtain tokens on behalf of themselves. These tokens can be obtained by using the Client Credentials Grant flow. In the future we'll add support for additional mechanisms to authenticate clients. User impersonation - Admins can now impersonate users. This allows admins to login to applications as a specific user without knowing the users credentials. Re-captcha for registration - Re-captcha can be enabled for the registration page. Upgrade to WildFly 9.0.1.Final - Keycloak is now built on top of WildFly 9.0.1.Final. More details on server info page - There's now a bit more details about the Keycloak server on the server info page in the admin console. Improvements to admin console We've had the UXP experts look at our admin console and we've already done some improvements. Expect more fine tuning of the admin console in the future. 更多内容请查看：发行说明。 该版本下载请到：Keycloak website。 Keycloak 是一个为浏览器和 RESTful Web 服务提供 SSO 的集成。基于 OAuth 2.0 和 JSON Web Token(JWT) 规范。最开始是面向 JBoss 和 Wildfly 通讯，但已经计划为其他诸如 Tomcat、Jetty、Node.js、Rails、Grails 等环境提供解决方案。 Keycloak 1.4.0.Final 发布，SSO 集成解决方案下载地址
