Question

I’m trying to add a mime-mapping element to the web.xml.

My current best stab is:

def doWithWebDescriptor = { xml ->     xml + {         'mime-mapping' {             'extension'('htc')             'mime-type'('text/x-component')         }     } } 

I know the code is being run as the above actually outputs an invalid web.xml. The following seems to be more logical but it doesn’t actually have any effect:

def doWithWebDescriptor = { xml ->     xml.'mime-mapping' + {             'extension'('htc')             'mime-type'('text/x-component')         } } 

edit: I’m using grails 1.0.3

Answer 1

Try

def doWithWebDescriptor = { xml ->     xml << {         'mime-mapping' {             'extension'('htc')             'mime-type'('text/x-component')         }     } } 

(note the leftShift instead of the plus).

Alternatively, if you want to ensure that your new element is inserted at a specific position within the XML, you can get the child element, after which you want your element to be inserted, and add yours with the plus operator. For example, I use the following code to add a new servlet-mapping:

def servletMappings = xml.'servlet-mapping' servletMappings[servletMappings.size() - 1] + {     'servlet-mapping' {         'servlet-name'('myServlet')         'url-pattern'('/myURL')     } } 

If you want to dig further into this, have a look at groovy.util.slurpersupport.NodeChild (the xml argument is of that type) and its superclass groovy.util.slurpersupport.GPathResult.

Good luck!