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Private implementation of the Apache MyFaces Trinidad project
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.trinidadinternal.context.external;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.Principal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import javax.faces.FacesException;
import javax.faces.application.Application;
import javax.faces.application.ViewHandler;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.myfaces.trinidad.logging.TrinidadLogger;
/**
* This class will implement the ExternalContext for use with Trinidad Configurations using the
* Trinidad {@link org.apache.myfaces.Trinidad.config.Configurator} object.
* This code was origionally taken from MyFaces.
*
* @version $Revision$ $Date$
*/
public class ServletExternalContext extends ExternalContext
{
public ServletExternalContext(final ServletContext servletContext,
final ServletRequest servletRequest, final ServletResponse servletResponse)
{
assert servletContext != null;
_servletContext = servletContext;
_servletRequest = servletRequest;
_servletResponse = servletResponse;
if (servletRequest != null && servletRequest instanceof HttpServletRequest)
{
_httpServletRequest = (HttpServletRequest) servletRequest;
if (_servletResponse != null)
{
_httpServletResponse = (HttpServletResponse) servletResponse;
}
}
if (_httpServletRequest != null)
{
_initHttpServletRequest();
}
}
@Override
public void dispatch(final String path) throws IOException, FacesException
{
_checkRequest();
_checkResponse();
final RequestDispatcher requestDispatcher = _servletRequest.getRequestDispatcher(path);
// If there is no dispatcher, send NOT_FOUND
if (requestDispatcher == null)
{
if (_httpServletResponse != null)
{
_httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
}
return;
}
try
{
requestDispatcher.forward(_servletRequest, _servletResponse);
}
catch (final ServletException e)
{
if (e.getMessage() != null)
{
throw new FacesException(e.getMessage(), e);
}
else
{
throw new FacesException(e);
}
}
}
@Override
public String encodeActionURL(final String url)
{
_checkRequest();
_checkNull(url, "url");
if (_httpServletRequest == null)
{
throw new IllegalArgumentException("Only HttpServletRequest supported");
}
return _httpServletResponse.encodeURL(url);
}
@Override
public String encodeNamespace(final String s)
{
_checkRequest();
return s;
}
@Override
public String encodeResourceURL(final String s)
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _httpServletResponse.encodeURL(s);
}
@Override
public Map getApplicationMap()
{
if (_applicationMap == null)
{
_applicationMap = new ServletApplicationMap(_servletContext);
}
return _applicationMap;
}
@Override
public String getAuthType()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _httpServletRequest.getAuthType();
}
@Override
public Object getContext()
{
return _servletContext;
}
@Override
public String getInitParameter(final String s)
{
return _servletContext.getInitParameter(s);
}
@Override
@SuppressWarnings("unchecked")
public Map getInitParameterMap()
{
if (_initParameterMap == null)
{
// We cache it as an attribute in ServletContext itself (is this circular reference a
// problem?)
if ((_initParameterMap = (Map)_servletContext.getAttribute(_INIT_PARAMETER_MAP_ATTRIBUTE)) == null)
{
_initParameterMap = new ServletInitParameterMap(_servletContext);
_servletContext.setAttribute(_INIT_PARAMETER_MAP_ATTRIBUTE, _initParameterMap);
}
}
return _initParameterMap;
}
@Override
public String getRemoteUser()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _httpServletRequest.getRemoteUser();
}
@Override
public Object getRequest()
{
return _servletRequest;
}
@Override
public String getRequestContextPath()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _httpServletRequest.getContextPath();
}
@Override
public Map getRequestCookieMap()
{
_checkRequest();
if (_requestCookieMap == null)
{
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
_requestCookieMap = new ServletCookieMap(_httpServletRequest);
}
return _requestCookieMap;
}
@Override
public Map getRequestHeaderMap()
{
_checkRequest();
if (_requestHeaderMap == null)
{
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
_requestHeaderMap = new ServletRequestHeaderMap(_httpServletRequest);
}
return _requestHeaderMap;
}
@Override
public Map getRequestHeaderValuesMap()
{
_checkRequest();
if (_requestHeaderValuesMap == null)
{
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
_requestHeaderValuesMap = new ServletRequestHeaderValuesMap(_httpServletRequest);
}
return _requestHeaderValuesMap;
}
@Override
public Locale getRequestLocale()
{
_checkRequest();
return _servletRequest.getLocale();
}
@Override
@SuppressWarnings("unchecked")
public Iterator getRequestLocales()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return new EnumerationIterator(_httpServletRequest.getLocales());
}
@Override
public Map getRequestMap()
{
_checkRequest();
if (_requestMap == null)
{
_requestMap = new ServletRequestMap(_servletRequest);
}
return _requestMap;
}
@Override
public Map getRequestParameterMap()
{
_checkRequest();
if (_requestParameterMap == null)
{
_requestParameterMap = new ServletRequestParameterMap(_servletRequest);
}
return _requestParameterMap;
}
@Override
public Iterator getRequestParameterNames()
{
_checkRequest();
@SuppressWarnings("unchecked")
final Iterator it = new EnumerationIterator(_servletRequest.getParameterNames());
return it;
}
@Override
public Map getRequestParameterValuesMap()
{
_checkRequest();
if (_requestParameterValuesMap == null)
{
_requestParameterValuesMap = new ServletRequestParameterValuesMap(_servletRequest);
}
return _requestParameterValuesMap;
}
@Override
public String getRequestPathInfo()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _requestPathInfo;
}
@Override
public String getRequestServletPath()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
// return ((HttpServletRequest)_servletRequest).getServletPath();
// HACK: see constructor
return _requestServletPath;
}
@Override
public URL getResource(final String s) throws MalformedURLException
{
return _servletContext.getResource(s);
}
@Override
public InputStream getResourceAsStream(final String s)
{
return _servletContext.getResourceAsStream(s);
}
@Override
@SuppressWarnings("unchecked")
public Set getResourcePaths(final String s)
{
return _servletContext.getResourcePaths(s);
}
@Override
public Object getResponse()
{
return _servletResponse;
}
@Override
public Writer getResponseOutputWriter() throws IOException
{
return _servletResponse.getWriter();
}
@Override
public OutputStream getResponseOutputStream() throws IOException
{
return _servletResponse.getOutputStream();
}
@Override
public Object getSession(final boolean create)
{
//If we don't have a request object, just return null
if (_httpServletRequest == null)
{
return null;
}
return _httpServletRequest.getSession(create);
}
@Override
public Map getSessionMap()
{
_checkRequest();
if (_sessionMap == null)
{
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
_sessionMap = new ServletSessionMap(_httpServletRequest);
}
return _sessionMap;
}
@Override
public Principal getUserPrincipal()
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _httpServletRequest.getUserPrincipal();
}
@Override
public boolean isUserInRole(final String role)
{
_checkRequest();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETREQUEST_SUPPORTED"));
}
return _httpServletRequest.isUserInRole(role);
}
@Override
public void log(final String message)
{
_servletContext.log(message);
}
@Override
public void log(final String message, final Throwable t)
{
_servletContext.log(message, t);
}
@Override
public void redirect(final String url) throws IOException
{
_checkResponse();
if (_servletResponse instanceof HttpServletResponse)
{
_httpServletResponse.sendRedirect(url);
FacesContext fc = FacesContext.getCurrentInstance();
if (fc != null)
{
fc.responseComplete();
}
}
else
{
throw new IllegalArgumentException(_LOG.getMessage(
"ONLY_HTTPSERVLETRESPONSE_SUPPORTED"));
}
}
@Override
public String getRequestCharacterEncoding()
{
_checkRequest();
return _servletRequest.getCharacterEncoding();
}
@Override
public String getRequestContentType()
{
_checkRequest();
return _servletRequest.getContentType();
}
@Override
public String getResponseCharacterEncoding()
{
_checkResponse();
return _servletResponse.getCharacterEncoding();
}
@Override
public String getResponseContentType()
{
_checkResponse();
return _servletResponse.getContentType();
}
@Override
public void setRequest(Object object)
{
_servletRequest = (ServletRequest) object;
if (object instanceof HttpServletRequest)
{
_httpServletRequest = (HttpServletRequest) object;
_initHttpServletRequest();
}
else
{
_httpServletRequest = null;
}
// And clear out any of the cached maps, since we should
// go back and look in the map
_requestCookieMap = null;
_requestHeaderMap = null;
_requestHeaderValuesMap = null;
_requestMap = null;
_requestParameterMap = null;
_requestParameterValuesMap = null;
}
@Override
public void setRequestCharacterEncoding(String string) throws UnsupportedEncodingException
{
_checkRequest();
_servletRequest.setCharacterEncoding(string);
}
@Override
public void setResponse(Object object)
{
_servletResponse = (ServletResponse) object;
if (_servletResponse instanceof HttpServletResponse)
_httpServletResponse = (HttpServletResponse) object;
else
_httpServletResponse = null;
}
@Override
public void setResponseCharacterEncoding(String string)
{
_checkResponse();
_servletResponse.setCharacterEncoding(string);
}
@Override
public void setResponseHeader(String name, String value)
{
_checkResponse();
if (_servletResponse instanceof HttpServletResponse)
((HttpServletResponse) _servletResponse).setHeader(name, value);
}
public void release()
{
_servletContext = null;
_servletRequest = null;
_servletResponse = null;
_applicationMap = null;
_sessionMap = null;
_requestMap = null;
_requestParameterMap = null;
_requestParameterValuesMap = null;
_requestHeaderMap = null;
_requestHeaderValuesMap = null;
_requestCookieMap = null;
_initParameterMap = null;
}
@Override
public String encodePartialActionURL(String url)
{
_checkNull(url, "url");
_checkResponse();
if (_httpServletRequest == null)
{
throw new IllegalArgumentException("Only HttpServletRequest supported");
}
return _httpServletResponse.encodeURL(url);
}
@Override
public String encodeBookmarkableURL(String url, Map> params)
{
_checkNull(url, "url");
return _encodeURL(url, params);
}
@Override
public String encodeRedirectURL(String url, Map> params)
{
_checkResponse();
_checkNull(url, "url");
if (_httpServletRequest == null)
{
throw new IllegalArgumentException("Only HttpServletRequest supported");
}
if (params == null)
return _httpServletResponse.encodeRedirectURL(url);
else
return _httpServletResponse.encodeRedirectURL(_encodeURL(url, params));
}
private void _checkNull(final Object o, final String param)
{
if (o == null)
{
throw new NullPointerException(_LOG.getMessage(
"CANNOT_BE_NULL", param));
}
}
private void _checkRequest()
{
if (_servletRequest == null)
{
throw new UnsupportedOperationException(_LOG.getMessage(
"NULL_REQUEST_ON_THIS_CONTEXT"));
}
}
private void _checkResponse()
{
if (_servletResponse == null)
{
throw new UnsupportedOperationException(_LOG.getMessage(
"NULL_RESPONSE_ON_THIS_CONTEXT"));
}
}
private String _lookupCharacterEncoding(final String contentType)
{
String characterEncoding = null;
if (contentType != null)
{
final int charsetFind = contentType.indexOf("charset=");
if (charsetFind != -1)
{
if (charsetFind == 0)
{
// charset at beginning of Content-Type, curious
characterEncoding = contentType.substring(8);
}
else
{
final char charBefore = contentType.charAt(charsetFind - 1);
if (charBefore == ';' || Character.isWhitespace(charBefore))
{
// Correct charset after mime type
characterEncoding = contentType.substring(charsetFind + 8);
}
}
if (_LOG.isFine())
{
_LOG.fine("Incoming request has Content-Type header with character encoding "
+ characterEncoding);
}
}
else
{
if (_LOG.isFine())
{
_LOG.fine("Incoming request has Content-Type header without character encoding: "
+ contentType);
}
}
}
return characterEncoding;
}
private void _initHttpServletRequest()
{
// TODO: is this necessary still?
// HACK: MultipartWrapper scrambles the servletPath for some reason in Tomcat 4.1.29 embedded
// in JBoss 3.2.3!?
// (this was reported by frederic.auge [[email protected]])
_requestServletPath = _httpServletRequest.getServletPath();
_requestPathInfo = _httpServletRequest.getPathInfo();
final String contentType = _httpServletRequest.getHeader("Content-Type");
String characterEncoding = _lookupCharacterEncoding(contentType);
if (characterEncoding == null)
{
final HttpSession session = _httpServletRequest.getSession(false);
if (session != null)
{
characterEncoding = (String) session.getAttribute(ViewHandler.CHARACTER_ENCODING_KEY);
}
if (characterEncoding != null)
{
try
{
_servletRequest.setCharacterEncoding(characterEncoding);
}
catch (UnsupportedEncodingException uee)
{
_LOG.warning(uee);
}
}
}
}
/**
* Cut-and-paste reuse from org/apache/myfaces/context/servlet/ServletExternalContextImpl.
*
* @param baseUrl
* @param parameters
* @return
*/
private String _encodeURL(String baseUrl, Map> parameters)
{
String fragment = null;
String queryString = null;
Map> paramMap = new HashMap>();
//extract any URL fragment
int index = baseUrl.indexOf(_URL_FRAGMENT_SEPERATOR);
if (index != -1)
{
fragment = baseUrl.substring(index + 1);
baseUrl = baseUrl.substring(0, index);
}
//extract the current query string and add the params to the paramMap
index = baseUrl.indexOf(_URL_QUERY_SEPERATOR);
if (index != -1)
{
queryString = baseUrl.substring(index + 1);
baseUrl = baseUrl.substring(0, index);
String[] nameValuePairs = queryString.split(_URL_PARAM_SEPERATOR);
for (int i = 0; i < nameValuePairs.length; i++)
{
String[] currentPair = nameValuePairs[i].split(_URL_NAME_VALUE_PAIR_SEPERATOR);
ArrayList value = new ArrayList(1);
try
{
value.add(currentPair.length > 1? URLDecoder.decode(currentPair[1], getResponseCharacterEncoding()): "");
}
catch (UnsupportedEncodingException e)
{
//shouldn't ever get here
throw new UnsupportedOperationException("Encoding type=" + getResponseCharacterEncoding() + " not supported",
e);
}
paramMap.put(currentPair[0], value);
}
}
FacesContext context = FacesContext.getCurrentInstance();
//add/update with new params on the paramMap
if (parameters != null && parameters.size() > 0)
{
for (Map.Entry> pair: parameters.entrySet())
{
if (pair.getKey() != null && pair.getKey().trim().length() != 0)
{
paramMap.put(pair.getKey(), _evaluateValueExpressions(context, pair.getValue()));
}
}
}
// start building the new URL
StringBuilder newUrl = new StringBuilder(baseUrl);
//now add the updated param list onto the url
if (paramMap.size() > 0)
{
boolean isFirstPair = true;
for (Map.Entry> pair: paramMap.entrySet())
{
for (String value: pair.getValue())
{
if (!isFirstPair)
{
newUrl.append(_URL_PARAM_SEPERATOR);
}
else
{
newUrl.append(_URL_QUERY_SEPERATOR);
isFirstPair = false;
}
newUrl.append(pair.getKey());
newUrl.append(_URL_NAME_VALUE_PAIR_SEPERATOR);
try
{
newUrl.append(URLEncoder.encode(value, getResponseCharacterEncoding()));
}
catch (UnsupportedEncodingException e)
{
//shouldn't ever get here
throw new UnsupportedOperationException("Encoding type=" + getResponseCharacterEncoding() +
" not supported", e);
}
}
}
}
//add the fragment back on (if any)
if (fragment != null)
{
newUrl.append(_URL_FRAGMENT_SEPERATOR + fragment);
}
return newUrl.toString();
}
/**
* Cut-and-paste reuse from org/apache/myfaces/context/servlet/ServletExternalContextImpl.
*
* Checks the Strings in the List for EL expressions and evaluates them.
* Note that the returned List will be a copy of the given List, because
* otherwise it will have unwanted side-effects.
* @param context faces context
* @param values from a query parameter that might have EL
* @return resultant list will have any embedded EL evaluated
*/
private List _evaluateValueExpressions(FacesContext context, List values)
{
// note that we have to create a new List here, because if we
// change any value on the given List, it will be changed in the
// NavigationCase too and the EL expression won't be evaluated again
List target = new ArrayList(values.size());
for (String value: values)
{
if (_isExpression(value))
{
if (context == null)
throw new UnsupportedOperationException("FacesContext not established yet. Unable to resolve EL bound query" +
"parameter value: \"" + value + "\"");
Application app = context.getApplication();
String dynamicValue = app.evaluateExpressionGet(context, value, String.class);
target.add(dynamicValue);
}
else
target.add(value);
}
return target;
}
/**
* Cut-and-paste reuse from org/apache/myfaces/context/servlet/ServletExternalContextImpl.
*
* @param text of query parameter that might contain EL
* @return true if the value of text contains an EL expression.
*/
private boolean _isExpression(String text)
{
return text.indexOf("#{") != -1;
}
private Map _applicationMap;
private HttpServletRequest _httpServletRequest;
private HttpServletResponse _httpServletResponse;
private Map _initParameterMap;
private Map _requestCookieMap;
private Map _requestHeaderMap;
private Map _requestHeaderValuesMap;
private Map _requestMap;
private Map _requestParameterMap;
private Map _requestParameterValuesMap;
private String _requestPathInfo;
private String _requestServletPath;
private ServletContext _servletContext;
private ServletRequest _servletRequest;
private ServletResponse _servletResponse;
private Map _sessionMap;
private static final String _URL_PARAM_SEPERATOR = "&";
private static final String _URL_QUERY_SEPERATOR = "?";
private static final String _URL_FRAGMENT_SEPERATOR = "#";
private static final String _URL_NAME_VALUE_PAIR_SEPERATOR = "=";
private static final String _INIT_PARAMETER_MAP_ATTRIBUTE = ServletInitParameterMap.class.getName();
private static final String _CHAR_ENCODING_CALLED = ServletExternalContext.class.getName() + ".CHAR_ENCODING_CALLED";
private static final TrinidadLogger _LOG = TrinidadLogger.createTrinidadLogger(ServletExternalContext.class);
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