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From sand...@apache.org
Subject cvs commit: jakarta-commons-sandbox/util/src/java/org/apache/commons/util/http RequestUtils.java
Date Fri, 22 Feb 2002 18:00:50 GMT
sanders     02/02/22 10:00:50

  Added:       servlet/src/java/org/apache/commons/servlet
                        RequestUtils.java
  Removed:     util/src/java/org/apache/commons/util/http RequestUtils.java
  Log:
  RequestUtils has a new resting place...
  
  Revision  Changes    Path
  1.1                  jakarta-commons-sandbox/servlet/src/java/org/apache/commons/servlet/RequestUtils.java
  
  Index: RequestUtils.java
  ===================================================================
  package org.apache.commons.servlet;
  
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" and
   *    "Apache Turbine" must not be used to endorse or promote products
   *    derived from this software without prior written permission. For
   *    written permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    "Apache Turbine", nor may "Apache" appear in their name, without
   *    prior written permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  
  import javax.servlet.http.HttpServletRequest;
  import org.apache.commons.util.StringUtils;
  
  /**
   * This class provides utilities for getting information from
   * javax.servlet.http.HttpServletRequest.
   *
   * @author <a href="mailto:lance@brainopolis.com">Lance Lavandowska</a>
   * @version $Id: RequestUtils.java,v 1.1 2002/02/22 18:00:50 sanders Exp $
   */
  public class RequestUtils
  {
      /**
       * Tries several variations of the header name in an attempt to
       * find a value for the header.  Header name should start with
       * format: all caps, words seperated with an underscore.  JRun
       * uses underscore with all capital letters, Resin uses dash with
       * title case, and OrionServer uses dash with all capitals, etc.
       *
       * @param request The HttpRequest in which to look for Header.
       * @param header  The String with the beginning name of Header.
       *
       * @return The String value of the header, or NULL if cannot be found.
       */
      public static String findHeader(HttpServletRequest request, String header)
      {
          // underscore w/allCap
          String headerValue = request.getHeader(header);
          if (headerValue == null)
          {
              // underscore w/ title case
              header = RequestUtils.headerToTitleCase(header.toLowerCase());
              headerValue = request.getHeader(header);
              if (headerValue == null)
              {
                  // dash w/ title case
                  header = StringUtils.replace(header, "_", "-");
                  headerValue = request.getHeader(header);
                  if (headerValue == null)
                  {
                      // dash w/ all caps
                      header = header.toUpperCase();
                      headerValue = request.getHeader(header);
                      if (headerValue == null)
                      {
                          // dash w/ all lower
                          header = header.toLowerCase();
                          headerValue = request.getHeader(header);
                          if (headerValue == null)
                          {
                              // underscore w/ all lower
                              header = StringUtils.replace(header, "-", "_");
                              headerValue = request.getHeader(header);
                          }
                      }
                  }
              }
          }
          return headerValue;
      }
  
      /**
       * Special implemenation - just for request headers.  Capitalizes
       * the first letter of each word.  Depends on words being
       * separated with "_" or "-".  FIXME: Assumes only one separator,
       * doesn't properly check header name string indices.
       *
       * @param header The HTTP header string to capitalize the distinct
       * words of.
       * @return The modified value of the header.
       */
      public static String headerToTitleCase(String header)
      {
          int underscoreLoc = header.indexOf("_");
          if (underscoreLoc == -1) underscoreLoc = header.indexOf("-");
          String firstChar = header.substring(0, 1).toUpperCase();
          if (underscoreLoc != -1)
          {
              String secondChar =
                  header.substring(underscoreLoc + 1, underscoreLoc + 2)
                  .toUpperCase();
              header = firstChar + header.substring(1, underscoreLoc + 1) +
                  secondChar + header.substring(underscoreLoc+2);
          }
          else
          {
              header = firstChar + header.substring(1);
          }
          return header;
      }
  }
  
  
  

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