override grails g:link tag

I am trying to override the g:link tag so that I can prefix an extra string. Here is my code:

import org.codehaus.groovy.grails.plugins.web.taglib.*

class ApplicationTagLib {

    static namespace = "g"

    def link = { attrs, body ->
        if("es".equalsIgnoreCase(request.stLocale.language)) {
            attrs['controller'] = "es/" + attrs['controller']
        }
        def applicationTagLib = grailsApplication.mainContext.getBean('org.codehaus.groovy.grails.plugins.web.taglib.ApplicationTagLib')
        applicationTagLib.link.call(attrs, body)
    }
}

This works fine except for when I add "es/" the resulting path gets translated into es%2F instead of es/ which causes the link to not work开发者_如何学运维.

Is there a way to prevent this from automatically encoding the new slash or a better way to prefix this string to the controller path?

You should be aware that in Grails the controller package (thus it's location in the project's structure path) does not correlate with the default URL mapping - the structure is flattened.

The slash you add to the controller name is thus encoded as it would otherwise form a part of the URL (and thus not map to a controller).

Perhaps the logic for handling different locale be better placed in a controller anyway.

You can add this '/es' prefix in all links generated by grails tags by configuring your UrlMappings.groovy. If you're using the default one, generated by grails create-app command, you can add '/es' in your URL's like this:

class UrlMappings {

    static mappings = {
        "/es/$controller/$action?/$id?" {  // <---------- added '/es' prefix
            constraints {
                // apply constraints here
            }
        }

        "/"(view: "/index")
        "500"(view: '/error')
    }
}

To learn more about URL Mappings, see the Grails guide.

Regards