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/*
* 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.renderkit.html.util;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlResponseWriterImpl;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
import org.apache.myfaces.shared_tomahawk.util.ClassUtils;
import org.apache.myfaces.shared_tomahawk.config.MyfacesConfig;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import java.net.URLEncoder;
/**
* This is a utility class to render link to resources used by custom components.
* Mostly used to avoid having to include [script src="..."][/script]
* in the head of the pages before using a component.
*
* When used together with the ExtensionsFilter, this class can allow components
* in the body of a page to emit script and stylesheet references into the page
* head section. The relevant methods on this object simply queue the changes,
* and when the page is complete the ExtensionsFilter calls back into this
* class to allow it to insert the commands into the buffered response.
*
* This class also works with the ExtensionsFilter to allow components to
* emit references to javascript/css/etc which are bundled in the component's
* jar file. Special URLs are generated which the ExtensionsFilter will later
* handle by retrieving the specified resource from the classpath.
*
* The special URL format is:
*
{contextPath} is the context path of the current webapp
*
{resourceLoaderName} is the fully-qualified name of a class which
* implements the ResourceLoader interface. When a browser app sends a request
* for the specified resource, an instance of the specified ResourceLoader class
* will be created and passed the resourceURI part of the URL for resolving to the
* actual resource to be served back. The standard MyFaces ResourceLoader
* implementation only serves resources for files stored beneath path
* org/apache/myfaces/custom in the classpath but non-myfaces code can provide their
* own ResourceLoader implementations.
*
*
* @author Sylvain Vieujot (latest modification by $Author: mmarinschek $)
* @version $Revision: 371739 373827 $ $Date: 2006-01-31 14:50:35 +0000 (Tue, 31 Jan 2006) $
*/
public class DefaultAddResource implements AddResource
{
private static final String PATH_SEPARATOR = "/";
protected static final Log log = LogFactory.getLog(DefaultAddResource.class);
private static final String RESOURCES_CACHE_KEY = AddResource.class.getName() + ".CACHE_KEY";
protected String _contextPath;
private StringBuffer originalResponse;
private Set headerBeginInfo;
private Set bodyEndInfo;
private Set bodyOnloadInfo;
protected boolean parserCalled = false;
protected int headerInsertPosition = -1;
protected int bodyInsertPosition = -1;
protected int beforeBodyPosition = -1;
protected int afterBodyContentInsertPosition = -1;
protected int beforeBodyEndPosition = -1;
private String resourceVirtualPath;
protected DefaultAddResource()
{
}
/**
* the context path for the web-app.
* You can set the context path only once, every subsequent set will throw an SecurityException
*/
public void setContextPath(String contextPath)
{
if (_contextPath != null)
{
throw new SecurityException("context path already set");
}
_contextPath = contextPath;
}
// Methods to add resources
/**
* Insert a [script src="url"] entry at the current location in the response.
* The resource is expected to be in the classpath, at the same location as the
* specified component + "/resource".
*
* Example: when customComponent is class example.Widget, and
* resourceName is script.js, the resource will be retrieved from
* "example/Widget/resource/script.js" in the classpath.
*/
public void addJavaScriptHere(FacesContext context, Class myfacesCustomComponent,
String resourceName) throws IOException
{
addJavaScriptHere(context, new MyFacesResourceHandler(myfacesCustomComponent, resourceName));
}
/**
* Insert a [script src="url"] entry at the current location in the response.
*
* @param uri is the location of the desired resource, relative to the base
* directory of the webapp (ie its contextPath).
*/
public void addJavaScriptHere(FacesContext context, String uri) throws IOException
{
ResponseWriter writer = context.getResponseWriter();
writer.startElement(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_ELEM, null);
writer.writeAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_TYPE_ATTR, org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT, null);
String src = context.getExternalContext().encodeResourceURL(getResourceUri(context, uri));
writer.writeURIAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SRC_ATTR, src, null);
writer.endElement(HTML.SCRIPT_ELEM);
}
public void addJavaScriptHerePlain(FacesContext context, String uri) throws IOException
{
ResponseWriter writer = context.getResponseWriter();
writer.startElement(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_ELEM, null);
writer.writeAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_TYPE_ATTR, org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT, null);
String src = getResourceUri(context, uri);
writer.writeURIAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SRC_ATTR, src, null);
writer.endElement(HTML.SCRIPT_ELEM);
}
/**
* Insert a [script src="url"] entry at the current location in the response.
*
* @param context The current faces-context
* @param resourceHandler is an object which specifies exactly how to build the url
* that is emitted into the script tag. Code which needs to generate URLs in ways
* that this class does not support by default can implement a custom ResourceHandler.
* @throws IOException
*/
public void addJavaScriptHere(FacesContext context, ResourceHandler resourceHandler)
throws IOException
{
validateResourceHandler(resourceHandler);
ResponseWriter writer = context.getResponseWriter();
writer.startElement(HTML.SCRIPT_ELEM, null);
writer.writeAttribute(HTML.SCRIPT_TYPE_ATTR, HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT, null);
String src = context.getExternalContext().encodeResourceURL(
getResourceUri(context, resourceHandler));
writer.writeURIAttribute(HTML.SRC_ATTR, src, null);
writer.endElement(HTML.SCRIPT_ELEM);
}
public void addResourceHere(FacesContext context, ResourceHandler resourceHandler)
throws IOException
{
validateResourceHandler(resourceHandler);
String path = getResourceUri(context, resourceHandler);
ResponseWriter writer = context.getResponseWriter();
writer.write(context.getExternalContext().encodeResourceURL(path));
}
/**
* Verify that the resource handler is acceptable. Null is not
* valid, and the getResourceLoaderClass method must return a
* Class object whose instances implements the ResourceLoader
* interface.
*
* @param resourceHandler handler to check
*/
protected void validateResourceHandler(ResourceHandler resourceHandler)
{
if (resourceHandler == null)
{
throw new IllegalArgumentException("ResourceHandler is null");
}
validateResourceLoader(resourceHandler.getResourceLoaderClass());
}
/**
* Given a Class object, verify that the instances of that class
* implement the ResourceLoader interface.
*
* @param resourceloader loader to check
*/
protected void validateResourceLoader(Class resourceloader)
{
if (!ResourceLoader.class.isAssignableFrom(resourceloader))
{
throw new FacesException("Class " + resourceloader.getName() + " must implement "
+ ResourceLoader.class.getName());
}
}
/**
* Adds the given Javascript resource to the document header at the specified
* document positioy by supplying a resourcehandler instance.
*
* Use this method to have full control about building the reference url
* to identify the resource and to customize how the resource is
* written to the response. In most cases, however, one of the convenience
* methods on this class can be used without requiring a custom ResourceHandler
* to be provided.
*
* If the script has already been referenced, it's added only once.
*
* Note that this method queues the javascript for insertion, and that
* the script is inserted into the buffered response by the ExtensionsFilter
* after the page is complete.
*/
public void addJavaScriptAtPosition(FacesContext context, ResourcePosition position,
ResourceHandler resourceHandler)
{
addJavaScriptAtPosition(context, position, resourceHandler, false);
}
/**
* Insert a [script src="url"] entry into the document header at the
* specified document position. If the script has already been
* referenced, it's added only once.
*
* The resource is expected to be in the classpath, at the same location as the
* specified component + "/resource".
*
* Example: when customComponent is class example.Widget, and
* resourceName is script.js, the resource will be retrieved from
* "example/Widget/resource/script.js" in the classpath.
*/
public void addJavaScriptAtPosition(FacesContext context, ResourcePosition position,
Class myfacesCustomComponent, String resourceName)
{
addJavaScriptAtPosition(context, position, new MyFacesResourceHandler(
myfacesCustomComponent, resourceName));
}
public void addJavaScriptAtPositionPlain(FacesContext context, ResourcePosition position, Class myfacesCustomComponent, String resourceName)
{
addJavaScriptAtPosition(context, position,
new MyFacesResourceHandler(myfacesCustomComponent, resourceName),
false, false);
}
/**
* Insert a [script src="url"] entry into the document header at the
* specified document position. If the script has already been
* referenced, it's added only once.
*
* @param defer specifies whether the html attribute "defer" is set on the
* generated script tag. If this is true then the browser will continue
* processing the html page without waiting for the specified script to
* load and be run.
*/
public void addJavaScriptAtPosition(FacesContext context, ResourcePosition position,
Class myfacesCustomComponent, String resourceName, boolean defer)
{
addJavaScriptAtPosition(context, position, new MyFacesResourceHandler(
myfacesCustomComponent, resourceName), defer);
}
/**
* Insert a [script src="url"] entry into the document header at the
* specified document position. If the script has already been
* referenced, it's added only once.
*
* @param uri is the location of the desired resource, relative to the base
* directory of the webapp (ie its contextPath).
*/
public void addJavaScriptAtPosition(FacesContext context, ResourcePosition position, String uri)
{
addJavaScriptAtPosition(context, position, uri, false);
}
/**
* Adds the given Javascript resource at the specified document position.
* If the script has already been referenced, it's added only once.
*/
public void addJavaScriptAtPosition(FacesContext context, ResourcePosition position, String uri,
boolean defer)
{
addPositionedInfo(position, getScriptInstance(context, uri, defer));
}
public void addJavaScriptToBodyTag(FacesContext context, String javascriptEventName,
String addedJavaScript)
{
AttributeInfo info = new AttributeInfo();
info.setAttributeName(javascriptEventName);
info.setAttributeValue(addedJavaScript);
addPositionedInfo(BODY_ONLOAD, info);
}
/**
* Adds the given Javascript resource at the specified document position.
* If the script has already been referenced, it's added only once.
*/
public void addJavaScriptAtPosition(FacesContext context, ResourcePosition position,
ResourceHandler resourceHandler, boolean defer)
{
validateResourceHandler(resourceHandler);
addPositionedInfo(position, getScriptInstance(context, resourceHandler, defer));
}
private void addJavaScriptAtPosition(FacesContext context, ResourcePosition position,
ResourceHandler resourceHandler, boolean defer, boolean encodeUrl)
{
validateResourceHandler(resourceHandler);
addPositionedInfo(position, getScriptInstance(context, resourceHandler, defer, encodeUrl));
}
/**
* Adds the given Style Sheet at the specified document position.
* If the style sheet has already been referenced, it's added only once.
*/
public void addStyleSheet(FacesContext context, ResourcePosition position,
Class myfacesCustomComponent, String resourceName)
{
addStyleSheet(context, position, new MyFacesResourceHandler(myfacesCustomComponent,
resourceName));
}
/**
* Adds the given Style Sheet at the specified document position.
* If the style sheet has already been referenced, it's added only once.
*/
public void addStyleSheet(FacesContext context, ResourcePosition position, String uri)
{
addPositionedInfo(position, getStyleInstance(context, uri));
}
/**
* Adds the given Style Sheet at the specified document position.
* If the style sheet has already been referenced, it's added only once.
*/
public void addStyleSheet(FacesContext context, ResourcePosition position,
ResourceHandler resourceHandler)
{
validateResourceHandler(resourceHandler);
addPositionedInfo(position, getStyleInstance(context, resourceHandler));
}
/**
* Adds the given Inline Style at the specified document position.
*/
public void addInlineStyleAtPosition(FacesContext context, ResourcePosition position, String inlineStyle)
{
addPositionedInfo(position, getInlineStyleInstance(inlineStyle));
}
/**
* Adds the given Inline Script at the specified document position.
*/
public void addInlineScriptAtPosition(FacesContext context, ResourcePosition position,
String inlineScript)
{
addPositionedInfo(position, getInlineScriptInstance(inlineScript));
}
public String getResourceUri(FacesContext context, Class myfacesCustomComponent,
String resource, boolean withContextPath)
{
return getResourceUri(context,
new MyFacesResourceHandler(myfacesCustomComponent, resource), withContextPath);
}
public String getResourceUri(FacesContext context, Class myfacesCustomComponent, String resource)
{
return getResourceUri(context, new MyFacesResourceHandler(myfacesCustomComponent, resource));
}
/**
* Get the Path used to retrieve an resource.
*/
public String getResourceUri(FacesContext context, ResourceHandler resourceHandler)
{
String uri = resourceHandler.getResourceUri(context);
if (uri == null)
{
return getResourceUri(context, resourceHandler.getResourceLoaderClass(), true);
}
return getResourceUri(context, resourceHandler.getResourceLoaderClass(), true) + uri;
}
/**
* Get the Path used to retrieve an resource.
*/
public String getResourceUri(FacesContext context, ResourceHandler resourceHandler,
boolean withContextPath)
{
String uri = resourceHandler.getResourceUri(context);
if (uri == null)
{
return getResourceUri(context, resourceHandler.getResourceLoaderClass(),
withContextPath);
}
return getResourceUri(context, resourceHandler.getResourceLoaderClass(), withContextPath)
+ uri;
}
/**
* Get the Path used to retrieve an resource.
*/
public String getResourceUri(FacesContext context, String uri)
{
return getResourceUri(context, uri, true);
}
/**
* Get the Path used to retrieve an resource.
*/
public String getResourceUri(FacesContext context, String uri, boolean withContextPath)
{
if (withContextPath)
{
return context.getApplication().getViewHandler().getResourceURL(context, uri);
}
return uri;
}
/**
* Get the Path used to retrieve an resource.
* @param context current faces-context
* @param resourceLoader resourceLoader
* @param withContextPath use the context-path of the web-app when accessing the resources
*
* @return the URI of the resource
*/
protected String getResourceUri(FacesContext context, Class resourceLoader,
boolean withContextPath)
{
StringBuffer sb = new StringBuffer(200);
sb.append(MyfacesConfig.getCurrentInstance(context.getExternalContext()).getResourceVirtualPath());
sb.append(PATH_SEPARATOR);
sb.append(resourceLoader.getName());
sb.append(PATH_SEPARATOR);
sb.append(getCacheKey(context));
sb.append(PATH_SEPARATOR);
return getResourceUri(context, sb.toString(), withContextPath);
}
/**
* Return a value used in the {cacheKey} part of a generated URL for a
* resource reference.
*
* Caching in browsers normally works by having files served to them
* include last-modified and expiry-time http headers. Until the expiry
* time is reached, a browser will silently use its cached version. After
* the expiry time, it will send a "get if modified since {time}" message,
* where {time} is the last-modified header from the version it has cached.
*
* Unfortunately this scheme only works well for resources represented as
* plain files on disk, where the webserver can easily and efficiently see
* the last-modified time of the resource file. When that query has to be
* processed by a servlet that doesn't scale well, even when it is possible
* to determine the resource's last-modified date from servlet code.
*
* Fortunately, for the AddResource class a static resource is only ever
* accessed because a URL was embedded by this class in a dynamic page.
* This makes it possible to implement caching by instead marking every
* resource served with a very long expiry time, but forcing the URL that
* points to the resource to change whenever the old cached version becomes
* invalid; the browser effectively thinks it is fetching a different
* resource that it hasn't seen before. This is implemented by embedding
* a "cache key" in the generated URL.
*
* Rather than using the actual modification date of a resource as the
* cache key, we simply use the webapp deployment time. This means that all
* data cached by browsers will become invalid after a webapp deploy (all
* the urls to the resources change). It also means that changes that occur
* to a resource without a webapp redeploy will not be seen by browsers.
*
* @param context the current faces-context
*
* @return the key for caching
*/
protected long getCacheKey(FacesContext context)
{
// cache key is hold in application scope so it is recreated on redeploying the webapp.
Map applicationMap = context.getExternalContext().getApplicationMap();
Long cacheKey = (Long) applicationMap.get(RESOURCES_CACHE_KEY);
if (cacheKey == null)
{
cacheKey = new Long(System.currentTimeMillis() / 100000);
applicationMap.put(RESOURCES_CACHE_KEY, cacheKey);
}
return cacheKey.longValue();
}
public boolean isResourceUri(ServletContext servletContext, HttpServletRequest request)
{
String path;
if (_contextPath != null)
{
path = _contextPath + getResourceVirtualPath(servletContext);
}
else
{
path = getResourceVirtualPath(servletContext);
}
//fix for TOMAHAWK-660; to be sure this fix is backwards compatible, the
//encoded context-path is only used as a first option to check for the prefix
//if we're sure this works for all cases, we can directly return the first value
//and not double-check.
try
{
if(request.getRequestURI().startsWith(URLEncoder.encode(path,"UTF-8")))
return true;
}
catch (UnsupportedEncodingException e)
{
log.error("Unsupported encoding UTF-8 used",e);
}
return request.getRequestURI().startsWith(path);
}
private String getResourceVirtualPath(ServletContext servletContext)
{
if(resourceVirtualPath == null)
{
resourceVirtualPath = servletContext.getInitParameter(MyfacesConfig.INIT_PARAM_RESOURCE_VIRTUAL_PATH);
if(resourceVirtualPath == null)
{
resourceVirtualPath = MyfacesConfig.INIT_PARAM_RESOURCE_VIRTUAL_PATH_DEFAULT;
}
}
return resourceVirtualPath;
}
private Class getClass(String className) throws ClassNotFoundException
{
Class clazz = ClassUtils.classForName(className);
validateResourceLoader(clazz);
return clazz;
}
public void serveResource(ServletContext context, HttpServletRequest request,
HttpServletResponse response) throws IOException
{
String pathInfo = request.getPathInfo();
String uri = request.getContextPath() + request.getServletPath()
+ (pathInfo == null ? "" : pathInfo);
String classNameStartsAfter = getResourceVirtualPath(context) + '/';
int posStartClassName = uri.indexOf(classNameStartsAfter) + classNameStartsAfter.length();
int posEndClassName = uri.indexOf(PATH_SEPARATOR, posStartClassName);
String className = uri.substring(posStartClassName, posEndClassName);
int posEndCacheKey = uri.indexOf(PATH_SEPARATOR, posEndClassName + 1);
String resourceUri = null;
if (posEndCacheKey + 1 < uri.length())
{
resourceUri = uri.substring(posEndCacheKey + 1);
}
try
{
Class resourceLoader = getClass(className);
validateResourceLoader(resourceLoader);
((ResourceLoader) resourceLoader.newInstance()).serveResource(context, request,
response, resourceUri);
response.flushBuffer();
}
catch (ClassNotFoundException e)
{
log.error("Could not find class for name: " + className, e);
response.sendError(HttpServletResponse.SC_NOT_FOUND,
"Could not find resourceloader class for name: " + className);
}
catch (InstantiationException e)
{
log.error("Could not instantiate class for name: " + className, e);
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
"Could not instantiate resourceloader class for name: " + className);
}
catch (IllegalAccessException e)
{
log.error("Could not access class for name: " + className, e);
response.sendError(HttpServletResponse.SC_FORBIDDEN,
"Could not access resourceloader class for name: " + className);
}
catch (Throwable e)
{
log.error("Error while serving resource: " + resourceUri + ", message : " + e.getMessage(), e);
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
}
// Positioned stuffs
protected Set getHeaderBeginInfos()
{
if (headerBeginInfo == null)
{
headerBeginInfo = new LinkedHashSet();
}
return headerBeginInfo;
}
protected Set getBodyEndInfos()
{
if (bodyEndInfo == null)
{
bodyEndInfo = new LinkedHashSet();
}
return bodyEndInfo;
}
protected Set getBodyOnloadInfos()
{
if (bodyOnloadInfo == null)
{
bodyOnloadInfo = new LinkedHashSet();
}
return bodyOnloadInfo;
}
private void addPositionedInfo(ResourcePosition position, PositionedInfo info)
{
if (HEADER_BEGIN.equals(position))
{
Set set = getHeaderBeginInfos();
set.add(info);
}
else if (BODY_END.equals(position))
{
Set set = getBodyEndInfos();
set.add(info);
}
else if (BODY_ONLOAD.equals(position))
{
Set set = getBodyOnloadInfos();
set.add(info);
}
}
public boolean hasHeaderBeginInfos()
{
return headerBeginInfo != null;
}
/**
* Parses the response to mark the positions where code will be inserted
*/
public void parseResponse(HttpServletRequest request, String bufferedResponse,
HttpServletResponse response)
{
originalResponse = new StringBuffer(bufferedResponse);
ParseCallbackListener l = new ParseCallbackListener();
ReducedHTMLParser.parse(originalResponse, l);
headerInsertPosition = l.getHeaderInsertPosition();
bodyInsertPosition = l.getBodyInsertPosition();
beforeBodyPosition = l.getBeforeBodyPosition();
afterBodyContentInsertPosition = l.getAfterBodyContentInsertPosition();
beforeBodyEndPosition = l.getAfterBodyEndPosition() - 7; // 7, which is the length of
parserCalled = true;
}
/**
* Writes the javascript code necessary for myfaces in every page, just befode the closing </body> tag
*/
public void writeMyFacesJavascriptBeforeBodyEnd(HttpServletRequest request,
HttpServletResponse response) throws IOException
{
if (!parserCalled)
{
throw new IOException("Method parseResponse has to be called first");
}
if (beforeBodyEndPosition >= 0)
{
String myFacesJavascript = (String) request.getAttribute("org.apache.myfaces.myFacesJavascript");
if (myFacesJavascript != null)
{
originalResponse.insert(beforeBodyEndPosition, myFacesJavascript);
}
else
{
log.warn("MyFaces special javascript could not be retrieved from request-map.");
}
}
}
/**
* Add the resources to the <head> of the page.
* If the head tag is missing, but the <body> tag is present, the head tag is added.
* If both are missing, no resource is added.
*
* The ordering is such that the user header CSS & JS override the MyFaces' ones.
*/
public void writeWithFullHeader(HttpServletRequest request,
HttpServletResponse response) throws IOException
{
if (!parserCalled)
{
throw new IOException("Method parseResponse has to be called first");
}
boolean addHeaderTags = false;
if (headerInsertPosition == -1)
{
if (beforeBodyPosition != -1)
{
// The input html has a body start tag, but no head tags. We therefore
// need to insert head start/end tags for our content to live in.
addHeaderTags = true;
headerInsertPosition = beforeBodyPosition;
}
else
{
// neither head nor body tags in the input
log.warn("Response has no or
tag:\n" + originalResponse);
}
}
ResponseWriter writer = new HtmlResponseWriterImpl(response.getWriter(),
HtmlRendererUtils.selectContentType(request.getHeader("accept")),
response.getCharacterEncoding());
if (afterBodyContentInsertPosition >= 0)
{
// insert all the items that want to go immediately after the tag.
HtmlBufferResponseWriterWrapper writerWrapper = HtmlBufferResponseWriterWrapper
.getInstance(writer);
for (Iterator i = getBodyEndInfos().iterator(); i.hasNext();)
{
writerWrapper.write("\n");
PositionedInfo positionedInfo = (PositionedInfo) i.next();
if (!(positionedInfo instanceof WritablePositionedInfo))
throw new IllegalStateException("positionedInfo of type : "
+ positionedInfo.getClass().getName());
((WritablePositionedInfo) positionedInfo).writePositionedInfo(response,
writerWrapper);
}
originalResponse.insert(headerInsertPosition, writerWrapper.toString());
}
if (bodyInsertPosition > 0)
{
StringBuffer buf = new StringBuffer();
Set bodyInfos = getBodyOnloadInfos();
if (bodyInfos.size() > 0)
{
int i = 0;
for (Iterator it = getBodyOnloadInfos().iterator(); it.hasNext();)
{
AttributeInfo positionedInfo = (AttributeInfo) it.next();
if (i == 0)
{
buf.append(positionedInfo.getAttributeName());
buf.append("=\"");
}
buf.append(positionedInfo.getAttributeValue());
i++;
}
buf.append("\"");
originalResponse.insert(bodyInsertPosition - 1, " " + buf.toString());
}
}
if (headerInsertPosition >= 0)
{
HtmlBufferResponseWriterWrapper writerWrapper = HtmlBufferResponseWriterWrapper
.getInstance(writer);
if (addHeaderTags)
writerWrapper.write("");
for (Iterator i = getHeaderBeginInfos().iterator(); i.hasNext();)
{
writerWrapper.write("\n");
PositionedInfo positionedInfo = (PositionedInfo) i.next();
if (!(positionedInfo instanceof WritablePositionedInfo))
throw new IllegalStateException("positionedInfo of type : "
+ positionedInfo.getClass().getName());
((WritablePositionedInfo) positionedInfo).writePositionedInfo(response,
writerWrapper);
}
if (addHeaderTags)
writerWrapper.write("");
originalResponse.insert(headerInsertPosition, writerWrapper.toString());
}
}
/**
* Writes the response
*/
public void writeResponse(HttpServletRequest request,
HttpServletResponse response) throws IOException
{
ResponseWriter writer = new HtmlResponseWriterImpl(response.getWriter(), HtmlRendererUtils
.selectContentType(request.getHeader("accept")),
response.getCharacterEncoding());
writer.write(originalResponse.toString());
}
private PositionedInfo getStyleInstance(FacesContext context, ResourceHandler resourceHandler)
{
return new StylePositionedInfo(getResourceUri(context, resourceHandler));
}
private PositionedInfo getScriptInstance(FacesContext context, ResourceHandler resourceHandler,
boolean defer)
{
return new ScriptPositionedInfo(getResourceUri(context, resourceHandler), defer);
}
private PositionedInfo getScriptInstance(FacesContext context, ResourceHandler resourceHandler,
boolean defer, boolean encodeURL)
{
return new ScriptPositionedInfo(getResourceUri(context, resourceHandler), defer, encodeURL);
}
private PositionedInfo getStyleInstance(FacesContext context, String uri)
{
return new StylePositionedInfo(getResourceUri(context, uri));
}
protected PositionedInfo getScriptInstance(FacesContext context, String uri, boolean defer)
{
return new ScriptPositionedInfo(getResourceUri(context, uri), defer);
}
private PositionedInfo getInlineScriptInstance(String inlineScript)
{
return new InlineScriptPositionedInfo(inlineScript);
}
private PositionedInfo getInlineStyleInstance(String inlineStyle)
{
return new InlineStylePositionedInfo(inlineStyle);
}
protected interface PositionedInfo
{
}
protected static class AttributeInfo implements PositionedInfo
{
private String _attributeName;
private String _attributeValue;
public String getAttributeName()
{
return _attributeName;
}
public void setAttributeName(String attributeName)
{
_attributeName = attributeName;
}
public String getAttributeValue()
{
return _attributeValue;
}
public void setAttributeValue(String attributeValue)
{
_attributeValue = attributeValue;
}
}
protected interface WritablePositionedInfo extends PositionedInfo
{
public abstract void writePositionedInfo(HttpServletResponse response, ResponseWriter writer)
throws IOException;
}
private abstract class AbstractResourceUri
{
protected final String _resourceUri;
protected AbstractResourceUri(String resourceUri)
{
_resourceUri = resourceUri;
}
public int hashCode()
{
return _resourceUri.hashCode();
}
public boolean equals(Object obj)
{
if (obj == null)
{
return false;
}
if (obj == this)
{
return true;
}
if (obj instanceof AbstractResourceUri)
{
AbstractResourceUri other = (AbstractResourceUri) obj;
return _resourceUri.equals(other._resourceUri);
}
return false;
}
protected String getResourceUri()
{
return _resourceUri;
}
}
private class StylePositionedInfo extends AbstractResourceUri implements WritablePositionedInfo
{
protected StylePositionedInfo(String resourceUri)
{
super(resourceUri);
}
public void writePositionedInfo(HttpServletResponse response, ResponseWriter writer)
throws IOException
{
writer.startElement(HTML.LINK_ELEM, null);
writer.writeAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.REL_ATTR, org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.STYLESHEET_VALUE, null);
writer.writeAttribute(HTML.HREF_ATTR, response.encodeURL(this.getResourceUri()), null);
writer.writeAttribute(HTML.TYPE_ATTR, HTML.STYLE_TYPE_TEXT_CSS, null);
writer.endElement(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.LINK_ELEM);
}
}
private class ScriptPositionedInfo extends AbstractResourceUri implements
WritablePositionedInfo
{
protected final boolean _defer;
protected final boolean _encode;
public ScriptPositionedInfo(String resourceUri, boolean defer)
{
this(resourceUri, defer, true);
}
public ScriptPositionedInfo(String resourceUri, boolean defer, boolean encodeUrl)
{
super(resourceUri);
_defer = defer;
_encode = encodeUrl;
}
public int hashCode()
{
return new HashCodeBuilder()
.append(this.getResourceUri())
.append(_defer)
.append(_encode)
.toHashCode();
}
public boolean equals(Object obj)
{
if (super.equals(obj))
{
if (obj instanceof ScriptPositionedInfo)
{
ScriptPositionedInfo other = (ScriptPositionedInfo) obj;
return new EqualsBuilder()
.append(_defer, other._defer)
.append(_encode, other._encode)
.isEquals();
}
}
return false;
}
public void writePositionedInfo(HttpServletResponse response, ResponseWriter writer)
throws IOException
{
writer.startElement(HTML.SCRIPT_ELEM, null);
writer.writeAttribute(HTML.SCRIPT_TYPE_ATTR, HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT, null);
if (_encode)
{
writer.writeAttribute(HTML.SRC_ATTR, response.encodeURL(this.getResourceUri()), null);
}
else
{
writer.writeAttribute(HTML.SRC_ATTR, this.getResourceUri(), null);
}
if (_defer)
{
writer.writeAttribute(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_ELEM_DEFER_ATTR, "true", null);
}
writer.endElement(org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_ELEM);
}
}
private abstract class InlinePositionedInfo implements WritablePositionedInfo
{
private final String _inlineValue;
protected InlinePositionedInfo(String inlineValue)
{
_inlineValue = inlineValue;
}
public String getInlineValue()
{
return _inlineValue;
}
public int hashCode()
{
return new HashCodeBuilder().append(_inlineValue).toHashCode();
}
public boolean equals(Object obj)
{
if (obj == null)
{
return false;
}
if (obj == this)
{
return true;
}
if (obj instanceof InlinePositionedInfo)
{
InlinePositionedInfo other = (InlinePositionedInfo) obj;
return new EqualsBuilder().append(_inlineValue, other._inlineValue).isEquals();
}
return false;
}
}
private class InlineScriptPositionedInfo extends InlinePositionedInfo
{
protected InlineScriptPositionedInfo(String inlineScript)
{
super(inlineScript);
}
public void writePositionedInfo(HttpServletResponse response, ResponseWriter writer)
throws IOException
{
writer.startElement(HTML.SCRIPT_ELEM, null);
writer.writeAttribute(HTML.SCRIPT_TYPE_ATTR, org.apache.myfaces.shared_tomahawk.renderkit.html.HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT, null);
writer.writeText(getInlineValue(), null);
writer.endElement(HTML.SCRIPT_ELEM);
}
}
private class InlineStylePositionedInfo extends InlinePositionedInfo
{
protected InlineStylePositionedInfo(String inlineStyle)
{
super(inlineStyle);
}
public void writePositionedInfo(HttpServletResponse response, ResponseWriter writer)
throws IOException
{
writer.startElement(HTML.STYLE_ELEM, null);
writer.writeAttribute(HTML.REL_ATTR, HTML.STYLESHEET_VALUE, null);
writer.writeAttribute(HTML.TYPE_ATTR, HTML.STYLE_TYPE_TEXT_CSS, null);
writer.writeText(getInlineValue(), null);
writer.endElement(HTML.STYLE_ELEM);
}
}
protected static class ParseCallbackListener implements CallbackListener
{
private int headerInsertPosition = -1;
private int bodyInsertPosition = -1;
private int beforeBodyPosition = -1;
private int afterBodyContentInsertPosition = -1;
private int afterBodyEndPosition = -1;
public ParseCallbackListener()
{
}
public void openedStartTag(int charIndex, int tagIdentifier)
{
if (tagIdentifier == ReducedHTMLParser.BODY_TAG)
{
beforeBodyPosition = charIndex;
}
}
public void closedStartTag(int charIndex, int tagIdentifier)
{
if (tagIdentifier == ReducedHTMLParser.HEAD_TAG)
{
headerInsertPosition = charIndex;
}
else if (tagIdentifier == ReducedHTMLParser.BODY_TAG)
{
bodyInsertPosition = charIndex;
}
}
public void openedEndTag(int charIndex, int tagIdentifier)
{
if (tagIdentifier == ReducedHTMLParser.BODY_TAG)
{
afterBodyContentInsertPosition = charIndex;
}
}
public void closedEndTag(int charIndex, int tagIdentifier)
{
if (tagIdentifier == ReducedHTMLParser.BODY_TAG)
{
afterBodyEndPosition = charIndex;
}
}
public void attribute(int charIndex, int tagIdentifier, String key, String value)
{
}
public int getHeaderInsertPosition()
{
return headerInsertPosition;
}
public int getBodyInsertPosition()
{
return bodyInsertPosition;
}
public int getBeforeBodyPosition()
{
return beforeBodyPosition;
}
public int getAfterBodyContentInsertPosition()
{
return afterBodyContentInsertPosition;
}
public int getAfterBodyEndPosition()
{
return afterBodyEndPosition;
}
}
public boolean requiresBuffer()
{
return true;
}
public void responseStarted()
{
}
public void responseFinished()
{
}
}
