| // |
| // ======================================================================== |
| // 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 javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| /** |
| * Abstract rule that matches against request headers. |
| */ |
| |
| public abstract class HeaderRule extends Rule |
| { |
| private String _header; |
| private String _headerValue; |
| |
| /* ------------------------------------------------------------ */ |
| public String getHeader() |
| { |
| return _header; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @param header |
| * the header name to check for |
| */ |
| public void setHeader(String header) |
| { |
| _header = header; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public String getHeaderValue() |
| { |
| return _headerValue; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @param headerValue |
| * the header value to match against. If null, then the |
| * presence of the header is enough to match |
| */ |
| public void setHeaderValue(String headerValue) |
| { |
| _headerValue = headerValue; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public String matchAndApply(String target, HttpServletRequest request, |
| HttpServletResponse response) throws IOException |
| { |
| String requestHeaderValue = request.getHeader(_header); |
| |
| if (requestHeaderValue != null) |
| if (_headerValue == null || _headerValue.equals(requestHeaderValue)) |
| apply(target, requestHeaderValue, request, response); |
| |
| return null; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Apply the rule to the request |
| * |
| * @param target |
| * field to attempt match |
| * @param value |
| * header value found |
| * @param request |
| * request object |
| * @param response |
| * response object |
| * @return The target (possible updated) |
| * @throws IOException |
| * exceptions dealing with operating on request or response |
| * objects |
| */ |
| protected abstract String apply(String target, String value, HttpServletRequest request, HttpServletResponse response) throws IOException; |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public String toString() |
| { |
| return super.toString() + "[" + _header + ":" + _headerValue + "]"; |
| } |
| |
| } |