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Browser automation framework dependency on jetty
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// ========================================================================
// Copyright (c) 2009-2009 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.security.authentication;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;

import javax.servlet.ServletOutputStream;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.security.Authenticator;
import org.eclipse.jetty.security.IdentityService;
import org.eclipse.jetty.security.LoginService;
import org.eclipse.jetty.security.ServerAuthException;
import org.eclipse.jetty.security.UserAuthentication;
import org.eclipse.jetty.server.Authentication;
import org.eclipse.jetty.server.UserIdentity;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;

public class DeferredAuthentication implements Authentication.Deferred
{
    private static final Logger LOG = Log.getLogger(DeferredAuthentication.class);

    protected final Authenticator _authenticator;

    private LoginService _loginService;
    private IdentityService _identityService;
    private Object _previousAssociation;


    /* ------------------------------------------------------------ */
    public DeferredAuthentication(Authenticator authenticator)
    {
        if (authenticator == null)
            throw new NullPointerException("No Authenticator");
        this._authenticator = authenticator;
    }
    
    /* ------------------------------------------------------------ */
    public DeferredAuthentication(LoginAuthenticator authenticator)
    {
        if (authenticator == null)
            throw new NullPointerException("No Authenticator");
        this._authenticator = authenticator;
    }
    
    /* ------------------------------------------------------------ */
    /** Get the identityService.
     * @return the identityService
     */
    public IdentityService getIdentityService()
    {
        return _identityService;
    }

    /* ------------------------------------------------------------ */
    /** Set the identityService.
     * @param identityService the identityService to set
     */
    public void setIdentityService(IdentityService identityService)
    {
        _identityService = identityService;
    }

    /* ------------------------------------------------------------ */
    public LoginService getLoginService()
    {
        return _loginService;
    }

    /* ------------------------------------------------------------ */
    public void setLoginService(LoginService loginService)
    {
        _loginService = loginService;
    }

    /* ------------------------------------------------------------ */
    /**
     * @see org.eclipse.jetty.server.Authentication.Deferred#authenticate(ServletRequest)
     */
    public Authentication authenticate(ServletRequest request)
    {
        try
        {
            Authentication authentication = _authenticator.validateRequest(request,__deferredResponse,true);
            
            if (authentication!=null && (authentication instanceof Authentication.User) && !(authentication instanceof Authentication.ResponseSent))
            {
                if (_identityService!=null)
                    _previousAssociation=_identityService.associate(((Authentication.User)authentication).getUserIdentity());
                return authentication;
            }
        }
        catch (ServerAuthException e)
        {
            LOG.debug(e);
        }
        return Authentication.UNAUTHENTICATED;
    }
    
    /* ------------------------------------------------------------ */
    /**
     * @see org.eclipse.jetty.server.Authentication.Deferred#authenticate(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
     */
    public Authentication authenticate(ServletRequest request, ServletResponse response)
    {
        try
        {
            Authentication authentication = _authenticator.validateRequest(request,response,true);
            if (authentication instanceof Authentication.User && _identityService!=null)
                _previousAssociation=_identityService.associate(((Authentication.User)authentication).getUserIdentity());
            return authentication;
        }
        catch (ServerAuthException e)
        {
            LOG.debug(e);
        }
        return Authentication.UNAUTHENTICATED;
    }

    /* ------------------------------------------------------------ */
    /**
     * @see org.eclipse.jetty.server.Authentication.Deferred#login(java.lang.String, java.lang.String)
     */
    public Authentication login(String username, String password)
    {
        if (_loginService!=null)
        {
            UserIdentity user = _loginService.login(username,password);
            if (user!=null)
            {
                UserAuthentication authentication = new UserAuthentication("API",user);
                if (_identityService!=null)
                    _previousAssociation=_identityService.associate(user);
                return authentication;
            }
        }
        return null;
    }

    /* ------------------------------------------------------------ */
    public Object getPreviousAssociation()
    {
        return _previousAssociation;
    }

    /* ------------------------------------------------------------ */
    /**
     * @param response
     * @return true if this response is from a deferred call to {@link #authenticate(ServletRequest)}
     */
    public static boolean isDeferred(HttpServletResponse response)
    {
        return response==__deferredResponse;
    }
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    final static HttpServletResponse __deferredResponse = new HttpServletResponse()
    {
        public void addCookie(Cookie cookie)
        {
        }

        public void addDateHeader(String name, long date)
        {
        }

        public void addHeader(String name, String value)
        {
        }

        public void addIntHeader(String name, int value)
        {
        }

        public boolean containsHeader(String name)
        {
            return false;
        }

        public String encodeRedirectURL(String url)
        {
            return null;
        }

        public String encodeRedirectUrl(String url)
        {
            return null;
        }

        public String encodeURL(String url)
        {
            return null;
        }

        public String encodeUrl(String url)
        {
            return null;
        }

        public void sendError(int sc) throws IOException
        {
        }

        public void sendError(int sc, String msg) throws IOException
        {
        }

        public void sendRedirect(String location) throws IOException
        {
        }

        public void setDateHeader(String name, long date)
        {
        }

        public void setHeader(String name, String value)
        {
        }

        public void setIntHeader(String name, int value)
        {
        }

        public void setStatus(int sc)
        {
        }

        public void setStatus(int sc, String sm)
        {
        }

        public void flushBuffer() throws IOException
        {
        }

        public int getBufferSize()
        {
            return 1024;
        }

        public String getCharacterEncoding()
        {
            return null;
        }

        public String getContentType()
        {
            return null;
        }

        public Locale getLocale()
        {
            return null;
        }

        public ServletOutputStream getOutputStream() throws IOException
        {
            return __nullOut;
        }

        public PrintWriter getWriter() throws IOException
        {
            return IO.getNullPrintWriter();
        }

        public boolean isCommitted()
        {
            return true;
        }

        public void reset()
        {
        }

        public void resetBuffer()
        {
        }

        public void setBufferSize(int size)
        {
        }

        public void setCharacterEncoding(String charset)
        {
        }

        public void setContentLength(int len)
        {
        }

        public void setContentType(String type)
        {
        }

        public void setLocale(Locale loc)
        {
        }

    };

    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    private static ServletOutputStream __nullOut = new ServletOutputStream()
    {
        public void write(int b) throws IOException
        {
        }

        public void print(String s) throws IOException
        {
        }

        public void println(String s) throws IOException
        {
        }
    };

    
}