| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 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 java.util.regex.Pattern; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| |
| /** |
| * Abstract rule to use as a base class for rules that match with a regular expression. |
| */ |
| public abstract class RegexRule extends Rule |
| { |
| protected Pattern _regex; |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Sets the regular expression string used to match with string URI. |
| * |
| * @param regex the regular expression. |
| */ |
| public void setRegex(String regex) |
| { |
| _regex=Pattern.compile(regex); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @return get the regular expression |
| */ |
| public String getRegex() |
| { |
| return _regex==null?null:_regex.pattern(); |
| } |
| |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public String matchAndApply(String target, HttpServletRequest request, HttpServletResponse response) throws IOException |
| { |
| Matcher matcher=_regex.matcher(target); |
| boolean matches = matcher.matches(); |
| if (matches) |
| return apply(target,request,response, matcher); |
| return null; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Apply this rule to the request/response pair. |
| * Called by {@link #matchAndApply(String, HttpServletRequest, HttpServletResponse)} if the regex matches. |
| * @param target field to attempt match |
| * @param request request object |
| * @param response response object |
| * @param matcher The Regex matcher that matched the request (with capture groups available for replacement). |
| * @return The target (possible updated). |
| * @throws IOException exceptions dealing with operating on request or response objects |
| */ |
| protected abstract String apply(String target, HttpServletRequest request, HttpServletResponse response, Matcher matcher) throws IOException; |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Returns the regular expression string. |
| */ |
| @Override |
| public String toString() |
| { |
| return super.toString()+"["+_regex+"]"; |
| } |
| } |