| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.struts2; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.commons.lang3.time.FastDateFormat; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import java.text.ParseException; |
| import java.util.Date; |
| import java.util.Locale; |
| import java.util.TimeZone; |
| |
| /** |
| * Request handling utility class. |
| */ |
| public class RequestUtils { |
| |
| private static final Logger LOG = LogManager.getLogger(RequestUtils.class); |
| |
| private static final TimeZone GMT = TimeZone.getTimeZone("GMT"); |
| |
| private static final String FORMAT_PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz"; |
| private static final String FORMAT_PATTERN_RFC1036 = "EEE, dd-MMM-yy HH:mm:ss zzz"; |
| private static final String FORMAT_PATTERN_ASCTIME = "EEE MMM d HH:mm:ss yyyy"; |
| |
| private static final FastDateFormat[] IF_MODIFIED_SINCE_FORMATS = { |
| FastDateFormat.getInstance(FORMAT_PATTERN_RFC1123, GMT, Locale.US), |
| FastDateFormat.getInstance(FORMAT_PATTERN_RFC1036, GMT, Locale.US), |
| FastDateFormat.getInstance(FORMAT_PATTERN_ASCTIME, GMT, Locale.US) |
| }; |
| |
| /** |
| * Retrieves the current request servlet path. |
| * Deals with differences between servlet specs (2.2 vs 2.3+) |
| * |
| * @param request the request |
| * @return the servlet path |
| */ |
| public static String getServletPath(HttpServletRequest request) { |
| String servletPath = request.getServletPath(); |
| |
| String requestUri = request.getRequestURI(); |
| // Detecting other characters that the servlet container cut off (like anything after ';') |
| if (requestUri != null && servletPath != null && !requestUri.endsWith(servletPath)) { |
| int pos = requestUri.indexOf(servletPath); |
| if (pos > -1) { |
| servletPath = requestUri.substring(requestUri.indexOf(servletPath)); |
| } |
| } |
| |
| if (StringUtils.isNotEmpty(servletPath)) { |
| return servletPath; |
| } |
| |
| int startIndex = request.getContextPath().equals("") ? 0 : request.getContextPath().length(); |
| int endIndex = request.getPathInfo() == null ? requestUri.length() : requestUri.lastIndexOf(request.getPathInfo()); |
| |
| if (startIndex > endIndex) { // this should not happen |
| endIndex = startIndex; |
| } |
| |
| return requestUri.substring(startIndex, endIndex); |
| } |
| |
| /** |
| * Gets the uri from the request |
| * |
| * @param request The request |
| * @return The uri |
| */ |
| public static String getUri(HttpServletRequest request) { |
| // handle http dispatcher includes. |
| String uri = (String) request.getAttribute("javax.servlet.include.servlet_path"); |
| if (uri != null) { |
| return uri; |
| } |
| |
| uri = getServletPath(request); |
| if (StringUtils.isNotEmpty(uri)) { |
| return uri; |
| } |
| |
| uri = request.getRequestURI(); |
| return uri.substring(request.getContextPath().length()); |
| } |
| |
| /** |
| * Parse input string as date in formats defined for If-Modified-Since header, |
| * see: |
| * https://issues.apache.org/jira/browse/WW-4263 |
| * https://web.archive.org/web/20081014021349/http://rfc.net/rfc2616.html#p20 |
| * |
| * @param headerValue value of If-Modified-Since header |
| * @return proper date or null |
| */ |
| public static Date parseIfModifiedSince(String headerValue) { |
| for (FastDateFormat fastDateFormat : IF_MODIFIED_SINCE_FORMATS) { |
| try { |
| return fastDateFormat.parse(headerValue); |
| } catch (ParseException ignore) { |
| LOG.debug("Error parsing value [{}] as [{}]!", headerValue, fastDateFormat); |
| } |
| } |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Error parsing value [{}] as date!", headerValue); |
| } |
| return null; |
| } |
| |
| } |