//
   //  ========================================================================
   //  Copyright (c) 1995-2013 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.websocket.server;
  
  import java.security.Principal;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  import javax.servlet.http.Cookie;
  import javax.servlet.http.HttpServletRequest;
  
  import org.eclipse.jetty.websocket.api.UpgradeRequest;
  import org.eclipse.jetty.websocket.api.extensions.ExtensionConfig;
  import org.eclipse.jetty.websocket.api.util.QuoteUtil;
  
  public class ServletWebSocketRequest extends UpgradeRequest
  {
      private Map<String, String> cookieMap;
      private HttpServletRequest req;
  
      public ServletWebSocketRequest(HttpServletRequest request)
      {
          super(request.getRequestURI());
          this.req = request;
  
          // Copy Request Line Details
          setMethod(request.getMethod());
          setHttpVersion(request.getProtocol());
  
          // Copy parameters
          super.setParameterMap(request.getParameterMap());
  
          // Copy Cookies
          cookieMap = new HashMap<String, String>();
          for (Cookie cookie : request.getCookies())
          {
              cookieMap.put(cookie.getName(),cookie.getValue());
          }
  
          // Copy Headers
          Enumeration<String> headerNames = request.getHeaderNames();
          while (headerNames.hasMoreElements())
          {
              String name = headerNames.nextElement();
              Enumeration<String> valuesEnum = request.getHeaders(name);
              List<String> values = new ArrayList<>();
              while (valuesEnum.hasMoreElements())
              {
                  values.add(valuesEnum.nextElement());
              }
              setHeader(name,values);
          }
  
          // Parse Sub Protocols
          Enumeration<String> protocols = request.getHeaders("Sec-WebSocket-Protocol");
          List<String> subProtocols = new ArrayList<>();
          String protocol = null;
          while ((protocol == null) && (protocols != null) && protocols.hasMoreElements())
          {
              String candidate = protocols.nextElement();
              for (String p : parseProtocols(candidate))
              {
                  subProtocols.add(p);
              }
          }
          setSubProtocols(subProtocols);
  
          // Parse Extension Configurations
          Enumeration<String> e = request.getHeaders("Sec-WebSocket-Extensions");
          while (e.hasMoreElements())
          {
              Iterator<String> extTokenIter = QuoteUtil.splitAt(e.nextElement(),",");
              while (extTokenIter.hasNext())
              {
                  String extToken = extTokenIter.next();
                  ExtensionConfig config = ExtensionConfig.parse(extToken);
                  addExtensions(config);
             }
         }
     }
 
     public Principal getPrincipal()
     {
         return req.getUserPrincipal();
     }
 
     public StringBuffer getRequestURL()
     {
         return req.getRequestURL();
     }
 
     public Map<String, Object> getServletAttributes()
     {
         Map<String, Object> attributes = new HashMap<String, Object>();
 
         for (String name : Collections.list(req.getAttributeNames()))
         {
             attributes.put(name,req.getAttribute(name));
         }
 
         return attributes;
     }
 
     public Map<String, List<String>> getServletParameters()
     {
         Map<String, List<String>> parameters = new HashMap<String, List<String>>();
 
         for (String name : Collections.list(req.getParameterNames()))
         {
             parameters.put(name,Collections.unmodifiableList(Arrays.asList(req.getParameterValues(name))));
         }
 
         return parameters;
     }
 
     /**
      * Return the HttpSession if it exists.
      * <p>
      * Note: this is equivalent to {@link HttpServletRequest#getSession()} and will not create a new HttpSession.
      */
     @Override
     public Object getSession()
     {
         return this.req.getSession();
     }
 
     protected String[] parseProtocols(String protocol)
     {
         if (protocol == null)
         {
             return new String[]
             { null };
         }
         protocol = protocol.trim();
         if ((protocol == null) || (protocol.length() == 0))
         {
             return new String[]
             { null };
         }
         String[] passed = protocol.split("\\s*,\\s*");
         String[] protocols = new String[passed.length + 1];
         System.arraycopy(passed,0,protocols,0,passed.length);
         return protocols;
     }
 
     public void setServletAttribute(String name, Object o)
     {
         this.req.setAttribute(name,o);
     }
 }