/* 
    P/P   *  Method: net.sourceforge.pebble.web.filter.BlogLookupFilter__static_init
          * 
          *  Postconditions:
          *    init'ed(log)
          */
     1  /*
     2   * Copyright (c) 2003-2006, Simon Brown
     3   * All rights reserved.
     4   *
     5   * Redistribution and use in source and binary forms, with or without
     6   * modification, are permitted provided that the following conditions are met:
     7   *
     8   *   - Redistributions of source code must retain the above copyright
     9   *     notice, this list of conditions and the following disclaimer.
    10   *
    11   *   - Redistributions in binary form must reproduce the above copyright
    12   *     notice, this list of conditions and the following disclaimer in
    13   *     the documentation and/or other materials provided with the
    14   *     distribution.
    15   *
    16   *   - Neither the name of Pebble nor the names of its contributors may
    17   *     be used to endorse or promote products derived from this software
    18   *     without specific prior written permission.
    19   *
    20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    30   * POSSIBILITY OF SUCH DAMAGE.
    31   */
    32  package net.sourceforge.pebble.web.filter;
    33  
    34  import org.apache.commons.logging.Log;
    35  import org.apache.commons.logging.LogFactory;
    36  
    37  import javax.servlet.*;
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.filter.BlogLookupFilter()
          */
    38  import javax.servlet.jsp.jstl.core.Config;
    39  import javax.servlet.http.HttpServletRequest;
    40  import java.io.IOException;
    41  import java.net.URLDecoder;
    42  import java.util.List;
    43  import java.util.Collections;
    44  import java.util.Locale;
    45  
    46  import net.sourceforge.pebble.PebbleContext;
    47  import net.sourceforge.pebble.Constants;
    48  import net.sourceforge.pebble.comparator.BlogEntryComparator;
    49  import net.sourceforge.pebble.decorator.ContentDecoratorChain;
    50  import net.sourceforge.pebble.api.decorator.ContentDecoratorContext;
    51  import net.sourceforge.pebble.domain.*;
    52  
    53  /**
    54   * A filter respsonsible for setting up the blog object.
    55   *
    56   * @author    Simon Brown
    57   */
    58  public class BlogLookupFilter implements Filter {
    59  
    60    /** the log used by this class */
    61    private static Log log = LogFactory.getLog(BlogLookupFilter.class);
    62  
    63    /** the config of this filter */
    64    private FilterConfig filterConfig;
    65  
    66    /**
    67     * Initialises this instance.
    68     *
    69     * @param config    a FilterConfig instance
    70     */
           /* 
    P/P     *  Method: void init(FilterConfig)
            * 
            *  Postconditions:
            *    this.filterConfig == config
            *    init'ed(this.filterConfig)
            */
    71    public void init(FilterConfig config) {
    72      this.filterConfig = config;
    73    }
    74  
    75    /**
    76     * Called when this filter is taken out of service.
    77     */
           /* 
    P/P     *  Method: void destroy()
            */
    78    public void destroy() {
    79    }
    80  
    81    /**
    82     * Contains the processing associated with this filter.
    83     */
    84    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
    85        throws ServletException, IOException {
    86  
    87      HttpServletRequest httpRequest = (HttpServletRequest)request;
    88      PebbleContext pebbleContext = PebbleContext.getInstance();
    89      AbstractBlog blog;
    90  
    91      String url = pebbleContext.getConfiguration().getUrl();
    92      if (pebbleContext != null && (url == null || url.length() == 0)) {
    93        String scheme = httpRequest.getScheme();
    94        url = scheme + "://" + httpRequest.getServerName() + ":" + httpRequest.getServerPort() + httpRequest.getContextPath();
    95        log.info("Setting Pebble URL to " + url);
    96        PebbleContext.getInstance().getConfiguration().setUrl(url);
    97      }
    98  
    99      // get URI and strip off the context (e.g. /blog)
   100      String uri = httpRequest.getRequestURI();
   101      uri = uri.substring(httpRequest.getContextPath().length(), uri.length());
   102  
   103      // now we're left with a URI
   104      if (BlogManager.getInstance().isMultiBlog()) {
   105        if (uri.length() == 0) {
   106          uri = "/";
   107        }
   108        int index = uri.indexOf("/", 1);
   109        if (index == -1) {
   110          index = uri.length();
   111        }
   112  
   113        String blogName = null;
   114        if (pebbleContext.getConfiguration().isVirtualHostingEnabled()) {
   115          String serverName = httpRequest.getServerName();
   116          blogName = serverName.substring(0, serverName.indexOf("."));
   117        } else {
   118          blogName = uri.substring(1, index);
   119        }
   120  
   121        blogName = URLDecoder.decode(blogName, "UTF-8");
   122        if (BlogManager.getInstance().hasBlog(blogName)) {
   123          blog = BlogManager.getInstance().getBlog(blogName);
   124          uri = uri.substring(index, uri.length());
   125        } else {
   126          blog = BlogManager.getInstance().getMultiBlog();
   127        }
   128      } else {
   129        blog = BlogManager.getInstance().getBlog();
   130      }
   131  
   132      httpRequest.setAttribute(Constants.BLOG_KEY, blog);
   133      httpRequest.setAttribute(Constants.BLOG_MANAGER, BlogManager.getInstance());
   134      httpRequest.setAttribute(Constants.PEBBLE_CONTEXT, pebbleContext);
   135  
   136      if (blog instanceof Blog) {
   137        httpRequest.setAttribute(Constants.BLOG_TYPE, "singleblog");
   138      } else {
   139        httpRequest.setAttribute(Constants.BLOG_TYPE, "multiblog");
   140      }
   141  
   142      chain.doFilter(request, response);
   143    }
   144  }