1 //======================================================================== 2 //$Id: RewriteRegexRule.java 966 2008-04-17 13:53:44Z gregw $ 3 //Copyright 2004-2005 Mort Bay Consulting Pty. Ltd. 4 //------------------------------------------------------------------------ 5 //Licensed under the Apache License, Version 2.0 (the "License"); 6 //you may not use this file except in compliance with the License. 7 //You may obtain a copy of the License at 8 //http://www.apache.org/licenses/LICENSE-2.0 9 //Unless required by applicable law or agreed to in writing, software 10 //distributed under the License is distributed on an "AS IS" BASIS, 11 //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 //See the License for the specific language governing permissions and 13 //limitations under the License. 14 //======================================================================== 15 package org.mortbay.jetty.handler.rewrite; 16 17 import java.io.IOException; 18 import java.util.regex.Matcher; 19 20 import javax.servlet.http.HttpServletRequest; 21 import javax.servlet.http.HttpServletResponse; 22 23 /** 24 * Rewrite the URI by matching with a regular expression. 25 * The replacement string may use $n" to replace the nth capture group. 26 */ 27 public class RewriteRegexRule extends RegexRule 28 { 29 private String _replacement; 30 31 /* ------------------------------------------------------------ */ 32 public RewriteRegexRule() 33 { 34 _handling = false; 35 _terminating = false; 36 } 37 38 /* ------------------------------------------------------------ */ 39 /** 40 * Whenever a match is found, it replaces with this value. 41 * 42 * @param replacement the replacement string. 43 */ 44 public void setReplacement(String replacement) 45 { 46 _replacement = replacement; 47 } 48 49 50 /* ------------------------------------------------------------ */ 51 /* (non-Javadoc) 52 * @see org.mortbay.jetty.handler.rules.RegexRule#apply(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.util.regex.Matcher) 53 */ 54 public String apply(String target, HttpServletRequest request, HttpServletResponse response, Matcher matcher) throws IOException 55 { 56 target=_replacement; 57 for (int g=1;g<=matcher.groupCount();g++) 58 { 59 String group = matcher.group(g); 60 target=target.replaceAll("\\$"+g,group); 61 } 62 63 return target; 64 } 65 66 /* ------------------------------------------------------------ */ 67 /** 68 * Returns the replacement string. 69 */ 70 public String toString() 71 { 72 return super.toString()+"["+_replacement+"]"; 73 } 74 }