| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.rewrite.handler; |
| |
| import java.io.IOException; |
| import java.util.regex.Matcher; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.eclipse.jetty.server.Request; |
| |
| /** |
| * Rewrite the URI by matching with a regular expression. |
| * The replacement string may use $n" to replace the nth capture group. |
| * If the replacement string contains ? character, then it is split into a path |
| * and query string component. The replacement query string may also contain $Q, which |
| * is replaced with the original query string. |
| * The returned target contains only the path. |
| */ |
| public class RewriteRegexRule extends RegexRule implements Rule.ApplyURI |
| { |
| private String _replacement; |
| private String _query; |
| private boolean _queryGroup; |
| |
| /* ------------------------------------------------------------ */ |
| public RewriteRegexRule() |
| { |
| _handling = false; |
| _terminating = false; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Whenever a match is found, it replaces with this value. |
| * |
| * @param replacement the replacement string. |
| */ |
| public void setReplacement(String replacement) |
| { |
| String[] split=replacement.split("\\?",2); |
| _replacement = split[0]; |
| _query=split.length==2?split[1]:null; |
| _queryGroup=_query!=null && _query.contains("$Q"); |
| } |
| |
| |
| /* ------------------------------------------------------------ */ |
| /* (non-Javadoc) |
| * @see org.eclipse.jetty.server.handler.rules.RegexRule#apply(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.util.regex.Matcher) |
| */ |
| @Override |
| public String apply(String target, HttpServletRequest request, HttpServletResponse response, Matcher matcher) throws IOException |
| { |
| target=_replacement; |
| String query=_query; |
| for (int g=1;g<=matcher.groupCount();g++) |
| { |
| String group=matcher.group(g); |
| if (group==null) |
| group=""; |
| else |
| group = Matcher.quoteReplacement(group); |
| target=target.replaceAll("\\$"+g,group); |
| if (query!=null) |
| query=query.replaceAll("\\$"+g,group); |
| } |
| |
| if (query!=null) |
| { |
| if (_queryGroup) |
| query=query.replace("$Q",request.getQueryString()==null?"":request.getQueryString()); |
| request.setAttribute("org.eclipse.jetty.rewrite.handler.RewriteRegexRule.Q",query); |
| } |
| |
| return target; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public void applyURI(Request request, String oldURI, String newURI) throws IOException |
| { |
| if (_query==null) |
| { |
| request.setURIPathQuery(newURI); |
| } |
| else |
| { |
| String query=(String)request.getAttribute("org.eclipse.jetty.rewrite.handler.RewriteRegexRule.Q"); |
| |
| if (!_queryGroup && request.getQueryString()!=null) |
| query=request.getQueryString()+"&"+query; |
| request.setURIPathQuery(newURI); |
| request.setQueryString(query); |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Returns the replacement string. |
| */ |
| @Override |
| public String toString() |
| { |
| return super.toString()+"["+_replacement+"]"; |
| } |
| } |