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(Quick Reference) # 7.2.5.7 Preventing processing of resources - Reference Documentation Authors: Graeme Rocher, Peter Ledbrook, Marc Palmer, Jeff Brown, Luke Daley, Burt Beckwith, Lari Hotari Version: 2.3.8 ## 7.2.5.7 Preventing processing of resources Sometimes you do not want a resource to be processed in a particular way, or even at all. Occasionally you may also want to disable all resource mapping. #### Preventing the application of a specific mapper to an individual resource All resource declarations support a convention of noXXXX:true where XXXX is a mapper name. So for example to prevent the "hashandcache" mapper from being applied to a resource (which renames and moves it, potentially breaking relative links written in JavaScript code), you would do this:
    modules = {
        forms {
            resource url: '/css/forms.css', nohashandcache: true
            resource url: '/js/forms.js', nohashandcache: true
        }
    }
#### Excluding/including paths and file types from specific mappers Mappers have includes/excludes Ant patterns to control whether they apply to a given resource. Mappers set sensible defaults for these based on their activity, for example the zipped-resources plugin's "zip" mapper is set to exclude images by default. You can configure this in your `Config.groovy` using the mapper name e.g:

    // We wouldn't link to .exe files using Resources but for the sake of example:
    grails.resources.zip.excludes = ['**/*.zip', '**/*.exe']// Perhaps for some reason we want to prevent bundling on "less" CSS files:
    grails.resources.bundle.excludes = ['**/*.less']
There is also an "includes" inverse. Note that settings these replaces the default includes/excludes for that mapper - it is not additive. #### Controlling what is treated as an "ad-hoc" (legacy) resource Ad-hoc resources are those undeclared, but linked to directly in your application without using the Grails or Resources linking tags (resource, img or external). These may occur with some legacy plugins or code with hardcoded paths in. There is a Config.groovy setting grails.resources.adhoc.patterns which defines a list of Servlet API compliant filter URI mappings, which the Resources filter will use to detect such "ad-hoc resource" requests. By default this is set to:
    grails.resources.adhoc.patterns = ['images/*', '*.js', '*.css']
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