在Grails中使用自己的方法扩展SpEL？ [英] Extending SpEL with own methods in Grails?

问题描述

我想在Grails应用程序中添加自定义的SpEL方法，就像在，通过覆盖 EvaluationContext 。这将工作吗？

I'd like to add custom SpEL methods in Grails applciation, like it's done for plain Spring-Security application in this question, by overriding EvaluationContext. Will this work?

如何将全局方法安全插入安全配置？我可以配置安全性，但要在那里添加什么？就像

How do I plug global-method-security into security config? I can configure security, but what to add there? Something like

grails.plugins.springsecurity = {
    'global-method-security' {
        'expression-handler' {
            ref("myMethodSecurityExpressionHandler")
        }
    }
}

？但是什么样的代码会解释它？

? But what code will interpret it?

展望 SpringSecurityCoreGrailsPlugin.groovy 也让我没有见解。

推荐答案

仅当您安装了spring-security-acl插件时才可用。它配置 expressionHandler bean：

This is only available if you also have the spring-security-acl plugin installed. It configures the expressionHandler bean:

expressionHandler(DefaultMethodSecurityExpressionHandler) {
   parameterNameDiscoverer = ref('parameterNameDiscoverer')
   permissionEvaluator = ref('permissionEvaluator')
   roleHierarchy = ref('roleHierarchy')
   trustResolver = ref('authenticationTrustResolver')
}

所以如果你有你自己的子类 DefaultMethodSecurityExpressionHandler 你可以像这样替换 resources.groovy 中的bean：

So if you have your own subclass of DefaultMethodSecurityExpressionHandler you can replace the bean in resources.groovy like this:

import com.mycompany.myapp.MyMethodSecurityExpressionHandler

beans = {
   expressionHandler(MyMethodSecurityExpressionHandler) {
      parameterNameDiscoverer = ref('parameterNameDiscoverer')
      permissionEvaluator = ref('permissionEvaluator')
      roleHierarchy = ref('roleHierarchy')
      trustResolver = ref('authenticationTrustResolver')
   }
}

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