Overriding grails.views.default.codec='html' config back to 'none'

问题

In Grails (<2.3), if I leave grails.views.default.code=\'none\' in the grails Config.groovy, it\'s up to me to HTML encode my expressions explicitly in the GSP files: ${myValue?.encodeAsHTML()}.

If I set grails.views.default.codec=\'html\" in the Config.groovy, then the HTML encoding happens automatically for every expression: ${myValue}.

My question: If I set the default to \'html\', how do I get back to \'none\' for one expression when I don\'t want the HTML encoding behavior?

回答1:

If default encoding level is set to html using

grails.views.default.codec = "html"

then for removing the html encoding for one expression in a page you can use

${raw(expression)}

回答2:

To summarize the various levels at which the codec can be applied:

Set Config.groovy's grails.views.default.codec='html' to get HTML escaping by default on all ${expressions} in the application.

Then when you want to default a whole page back to none, use the directive:

<%@page defaultCodec="none" %>

or

<%@ defaultCodec="none" %>

To disable HTML encoding for one expression in a page that is otherwise defaulting to HTML, use <%=expression%> notation instead of ${...}.

回答3:

Try using ${raw(myValue)} , you do not need to declare page codecs etc

回答4:

From GRAILS-1827, it looks like you can override the default codec for a specific page with

<%@ defaultCodec="HTML" %>

or

<%@page defaultCodec="HTML" %>

in some versions (see the referenced issue).

回答5:

I may have a solution. I'm not sure how accepted it is, though.

I can set the default codec for expressions to HTML, but then use <%=myValue%> notation in GSP instead of ${} expressions to get the unescaped values onto the page.

回答6:

Write your own tag and write the expression direct to the output stream:

class YourTagLib {

    static namespace = "x"

    def unescaped = { attrs, body ->
        out << attrs.value
    }

}

Use it in your GSP:

<x:unescaped value="${yourexpression}"/>

来源：https://stackoverflow.com/questions/1337464/overriding-grails-views-default-codec-html-config-back-to-none