//
   //  ========================================================================
   //  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.websocket.servlet;
  
  import java.net.HttpCookie;
  import java.net.InetSocketAddress;
  import java.net.URISyntaxException;
  import java.security.Principal;
  import java.security.cert.X509Certificate;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  
  import javax.servlet.http.Cookie;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpSession;
  
  import org.eclipse.jetty.websocket.api.UpgradeRequest;
  import org.eclipse.jetty.websocket.api.extensions.ExtensionConfig;
  import org.eclipse.jetty.websocket.api.util.WSURI;
  
  /**
   * Servlet specific {@link UpgradeRequest} implementation.
   */
  public class ServletUpgradeRequest extends UpgradeRequest
  {
      private final UpgradeHttpServletRequest request;
  
      public ServletUpgradeRequest(HttpServletRequest httpRequest) throws URISyntaxException
      {
          super(WSURI.toWebsocket(httpRequest.getRequestURL(), httpRequest.getQueryString()));
          this.request = new UpgradeHttpServletRequest(httpRequest);
  
          // Parse protocols.
          Enumeration<String> requestProtocols = request.getHeaders("Sec-WebSocket-Protocol");
          if (requestProtocols != null)
          {
              List<String> protocols = new ArrayList<>(2);
              while (requestProtocols.hasMoreElements())
              {
                  String candidate = requestProtocols.nextElement();
                  Collections.addAll(protocols, parseProtocols(candidate));
              }
              setSubProtocols(protocols);
          }
  
          // Parse extensions.
          Enumeration<String> e = request.getHeaders("Sec-WebSocket-Extensions");
          setExtensions(ExtensionConfig.parseEnum(e));
  
          // Copy cookies.
          Cookie[] requestCookies = request.getCookies();
          if (requestCookies != null)
          {
              List<HttpCookie> cookies = new ArrayList<>();
              for (Cookie requestCookie : requestCookies)
              {
                  HttpCookie cookie = new HttpCookie(requestCookie.getName(), requestCookie.getValue());
                  // No point handling domain/path/expires/secure/httponly on client request cookies
                  cookies.add(cookie);
              }
              setCookies(cookies);
          }
  
          setHeaders(request.getHeaders());
  
          // Copy parameters.
          Map<String, String[]> requestParams = request.getParameterMap();
          if (requestParams != null)
          {
              Map<String, List<String>> params = new HashMap<>(requestParams.size());
              for (Map.Entry<String, String[]> entry : requestParams.entrySet())
                  params.put(entry.getKey(), Arrays.asList(entry.getValue()));
              setParameterMap(params);
          }
  
          setSession(request.getSession(false));
  
         setHttpVersion(request.getProtocol());
         setMethod(request.getMethod());
     }
 
     public X509Certificate[] getCertificates()
     {
         return (X509Certificate[])request.getAttribute("javax.servlet.request.X509Certificate");
     }
 
     /**
      * Return the underlying HttpServletRequest that existed at Upgrade time.
      * <p>
      * Note: many features of the HttpServletRequest are invalid when upgraded,
      * especially ones that deal with body content, streams, readers, and responses.
      *
      * @return a limited version of the underlying HttpServletRequest
      */
     public HttpServletRequest getHttpServletRequest()
     {
         return request;
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getLocalAddr()}
      *
      * @return the local address
      */
     public String getLocalAddress()
     {
         return request.getLocalAddr();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getLocalName()}
      *
      * @return the local host name
      */
     public String getLocalHostName()
     {
         return request.getLocalName();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getLocalPort()}
      *
      * @return the local port
      */
     public int getLocalPort()
     {
         return request.getLocalPort();
     }
 
     /**
      * Return a {@link InetSocketAddress} for the local socket.
      * <p>
      * Warning: this can cause a DNS lookup
      *
      * @return the local socket address
      */
     public InetSocketAddress getLocalSocketAddress()
     {
         return new InetSocketAddress(getLocalAddress(), getLocalPort());
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getLocale()}
      *
      * @return the preferred <code>Locale</code> for the client
      */
     public Locale getLocale()
     {
         return request.getLocale();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getLocales()}
      *
      * @return an Enumeration of preferred Locale objects
      */
     public Enumeration<Locale> getLocales()
     {
         return request.getLocales();
     }
 
     /**
      * @return the principal
      * @deprecated use {@link #getUserPrincipal()} instead
      */
     @Deprecated
     public Principal getPrincipal()
     {
         return getUserPrincipal();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getUserPrincipal()}
      */
     public Principal getUserPrincipal()
     {
         return request.getUserPrincipal();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getRemoteAddr()}
      *
      * @return the remote address
      */
     public String getRemoteAddress()
     {
         return request.getRemoteAddr();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getRemoteHost()}
      *
      * @return the remote host name
      */
     public String getRemoteHostName()
     {
         return request.getRemoteHost();
     }
 
     /**
      * Equivalent to {@link HttpServletRequest#getRemotePort()}
      *
      * @return the remote port
      */
     public int getRemotePort()
     {
         return request.getRemotePort();
     }
 
     /**
      * Return a {@link InetSocketAddress} for the remote socket.
      * <p>
      * Warning: this can cause a DNS lookup
      *
      * @return the remote socket address
      */
     public InetSocketAddress getRemoteSocketAddress()
     {
         return new InetSocketAddress(getRemoteAddress(), getRemotePort());
     }
 
     public Map<String, Object> getServletAttributes()
     {
         return request.getAttributes();
     }
 
     public Map<String, List<String>> getServletParameters()
     {
         return getParameterMap();
     }
 
     /**
      * Return the HttpSession if it exists.
      * <p>
      * Note: this is equivalent to {@link HttpServletRequest#getSession(boolean)}
      * and will not create a new HttpSession.
      */
     @Override
     public HttpSession getSession()
     {
         return request.getSession(false);
     }
 
     public void setServletAttribute(String name, Object value)
     {
         request.setAttribute(name, value);
     }
 
     public Object getServletAttribute(String name)
     {
         return request.getAttribute(name);
     }
 
     public boolean isUserInRole(String role)
     {
         return request.isUserInRole(role);
     }
 
     public String getRequestPath()
     {
         // Since this can be called from a filter, we need to be smart about determining the target request path.
         String contextPath = request.getContextPath();
         String requestPath = request.getRequestURI();
         if (requestPath.startsWith(contextPath))
             requestPath = requestPath.substring(contextPath.length());
         return requestPath;
     }
 
     private String[] parseProtocols(String protocol)
     {
         if (protocol == null)
             return new String[0];
         protocol = protocol.trim();
         if (protocol.length() == 0)
             return new String[0];
         return protocol.split("\\s*,\\s*");
     }
 
     public void complete()
     {
         request.complete();
     }
 }