001// Copyright 2008 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.internal.services; 016 017import org.apache.tapestry5.services.HttpServletRequestFilter; 018import org.apache.tapestry5.services.HttpServletRequestHandler; 019 020import javax.servlet.http.HttpServletRequest; 021import javax.servlet.http.HttpServletResponse; 022import java.io.IOException; 023import java.util.Collection; 024import java.util.regex.Pattern; 025 026public class IgnoredPathsFilter implements HttpServletRequestFilter 027{ 028 private final Pattern[] ignoredPatterns; 029 030 public IgnoredPathsFilter(Collection<String> configuration) 031 { 032 ignoredPatterns = new Pattern[configuration.size()]; 033 034 int i = 0; 035 036 for (String regexp : configuration) 037 { 038 Pattern p = Pattern.compile(regexp, Pattern.CASE_INSENSITIVE); 039 040 ignoredPatterns[i++] = p; 041 } 042 } 043 044 public boolean service(HttpServletRequest request, HttpServletResponse response, HttpServletRequestHandler handler) 045 throws IOException 046 { 047 // The servlet path should be "/", and path info is everything after that. 048 049 String path = request.getServletPath(); 050 String pathInfo = request.getPathInfo(); 051 052 if (pathInfo != null) path += pathInfo; 053 054 055 for (Pattern p : ignoredPatterns) 056 { 057 if (p.matcher(path).matches()) return false; 058 } 059 060 // Not a match, so let it go. 061 062 return handler.service(request, response); 063 } 064}