Grails-跨控制器代码，对每个请求执行 [英] Grails - cross controller code, execute on every request

问题描述

是否有一种方法可以在调用任何控制器动作之前执行一些代码?

Is there a way of executing some piece of code before any controller action gets called?

我需要基于get参数的值设置会话变量，而无需考虑调用哪个控制器.

I need to set a session variable based on the value of a get parameter, without taking into account which controller gets called.

当然，一旦完成此处理，请求就必须按照其正常方式执行相应的控制器/操作.

Of course, once this processing is done, the request needs to follow its normal way to the corresponding controller/action.

谢谢

推荐答案

听起来像您想使用例如 grails-app/conf/MyFilter.groovy

class MyFilter {
    def filters = {
        extractSomething(controller: '*', action: '*') {
            before = {
                session.setAttribute('foo', params['paramName'])
            }
        }
    }
}

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