自前のDefaultServlet(StaticResourceServlet)

MyStaticResourceServlet.groovy

//
// デフォルトサーブレット
//

import java.util.regex.*;
import javax.servlet.*;
import javax.servlet.http.*;


public class MyStaticResourceServlet extends HttpServlet {

	static String BR = System.getProperty('line.separator')

	def regex_endswith_slash = { '^/(.*)/$' }
	def path_endswith_slash  =  { "/view.gsp?id=${it.group(1)}/index" }


	@Override
	public void doPost( HttpServletRequest request, HttpServletResponse response){ doGet(request,response) }
	@Override
	public void doGet( HttpServletRequest request, HttpServletResponse response){

		String spath = getPathInfo(request)
		Matcher m = null

		// chk only slash
		m = Pattern.compile(regex_endswith_slash()).matcher(spath)
		if( m.matches() ){
			def f_spath = path_endswith_slash(m)

			//println 'Called  HTML --------------------------'
			//println f_spath

			request.getRequestDispatcher(f_spath).forward( request,response )
			return 
		}

		String rPath = getServletContext().getRealPath("/");
		def file = new File( new File(rPath), spath.replaceAll('^/','') )
		//println "----------- ${file.absolutePath}"


		if( ['js','css'].find{ file.name.endsWith(it) } ){

			if( file.name.endsWith('css') )
				//response.contentType = 'text/css'
				response.contentType = 'text/css;charset=UTF-8'
			if( file.name.endsWith('js') ){
				//response.contentType = 'application/x-javascript'
				response.contentType = 'application/x-javascript;charset=UTF-8'
			}

			def w = response.getWriter()
			file.newReader('UTF-8').each{ w << it << BR }
			w.close()
			return 
		}
		else if( ['ico'].find{ file.name.endsWith(it) } ){
			response.contentType = 'image/x-icon'
			outputAsBinary( response,file )
			return 
		}
		else{
			outputAsBinary( response,file )
			return 
		}
	}

	private void outputAsBinary( def response , def file ){
	        def out = response.outputStream
	
	        def is = file.newInputStream()
	        while( true ){
	            def data = is.read()
	            if( data==-1 ){ break }
	
	            out.write( data )
	        }
	        is.close()
	
	        out.close()
	}

	static private String getPathInfo(HttpServletRequest request){

  		String spath=(String)request.getAttribute("javax.servlet.include.servlet_path");
	   	if (spath == null) {
	    		spath = ((HttpServletRequest) request).getServletPath();
	    		if (spath == null || spath.length() == 0) {
	    			// Servlet 2.1 puts the path of an extension-matched
	    			// servlet in PathInfo.
	    			spath = ((HttpServletRequest) request).getPathInfo();
	    		}
	   	}

		return spath;
	}
}