JSF:从罐子中提供资源 [英] JSF: Serving Resources From a Jar
问题描述
我正在创建几个装有facelets模板的罐子，以供整个组织使用.
I´m in the process to create a couple of jars packed with facelets templates for usage through the organisation.
卡在JSF 1.2中的此功能并不是开箱即用的. 堆栈:
Stuck in JSF 1.2 this functionality does not come out of the box. Stack:
- Jboss EAP 5.1
- 接缝2.2
- Richfaces 3.3.3
在我看来，我主要需要两个资源:
It seems to me that I primarily need two resources:
- 找到Faclets资源的资源解析器
- 从jar服务CSS和js资源的东西
资源解析器似乎很简单: http://ocpsoft.org/opensource/create-common-facelets-jar/
Resource resolver seems to be the easy part: http://ocpsoft.org/opensource/create-common-facelets-jar/
流css/js的事情稍微复杂一些: JSF:从罐子中提供资源 http://cagataycivici.wordpress.com/2006/05/09/jsf_serving_resources_from_a/
The thing that streams css / js is slightly more complicated: JSF: Serving Resources From a Jar http://cagataycivici.wordpress.com/2006/05/09/jsf_serving_resources_from_a/
- 相位监听器
- 过滤器
- Servlet
- Weblets
我非常想使用Weblet，因为它似乎是致力于解决该问题的项目.此外，在我买的这本很酷的JSF书中，推荐使用:"Pro JSF和Ajax 构建富Internet组件"
I would very much like to use Weblets as it seems to be project dedicated to solve this problem. Furthermore it is recommended in this cool JSF book i bought: "Pro JSF and Ajax Building Rich Internet Components"
问题是我无法在任何Maven存储库中找到稳定的发行版，也没有文档.在此示例中，不使用小孔:
https://github.com/werpu/weblets
在上面的文章中，突出显示了筛选器是一个很好的解决方案. http://myfaces.apache .org/tomahawk-project/tomahawk/apidocs/org/apache/myfaces/webapp/filter/ExtensionsFilter.html
In the article above a Filter is highlighted as a good solution. http://myfaces.apache.org/tomahawk-project/tomahawk/apidocs/org/apache/myfaces/webapp/filter/ExtensionsFilter.html
遗憾的是，要采用此解决方案并不是一件容易的事.我根本没有时间(或目前没有知识):(
Sadly it is not a simple task to hook in to this solution. I simply do not have the time (or knowledge at the moment) :(
可能可以使用此项目: http://jawr.java.net/introduction.html Jawr旨在捆绑js和CSS文件.
Possible I can use this project: http://jawr.java.net/introduction.html Jawr aims to bundle js and css files.
项目Wiki指示有可能: http://jawr.java.net/docs/generators.html 参见类路径资源生成器"部分.
The project wiki indicates that it could be possible: http://jawr.java.net/docs/generators.html see the "classpath resource generator" section.
请咨询:)
推荐答案
您好，我想从jar加载css，js等，您可以使用以下代码.
Hello i you would like to load css, js etc from a jar you could use the following.
package se.lu.ldc.core.servlet;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import javax.faces.webapp.FacesServlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
/**
* Servlet för att hämta diverse filer från jar om de finns i jaren
* jpg, png, gif, css, xcss,xml,js
* @author ldc-jha
*
*/
@WebServlet(name="ldcServlet",loadOnStartup=1,urlPatterns={"*.jpg","*.png","*.gif","*.css","*.xcss","*.js"})
public class LDCFrameWorkServlet extends HttpServlet
{
//where the files are in the jar.
public final String BASE_PATH = "xhtml/framework";
private Logger log = Logger.getLogger(getClass().getName());
@Override
public void init(ServletConfig config) throws ServletException
{
System.out.println("INIT()");
super.init(config);
}
@Override
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
/* if this servlet is not mapped to a path, use the request URI */
String path = request.getPathInfo();
if (path == null) {
path = request.getRequestURI().substring(
request.getContextPath().length());
}
URL resource = Thread.currentThread().getContextClassLoader().
getResource(BASE_PATH+"/"+path.substring(1));
if (resource == null) {
ServletContext sc = getServletContext();
String filename = sc.getRealPath(path);
log.info("During Load:"+resource+":"+path+":"+filename);
try{
resource = sc.getResource(path);
}catch(Exception e){}
if(resource == null)
{
response.sendError(404, path + " denied");
}
}
/* failure conditions */
if (path.endsWith(".seam")) {
javax.faces.webapp.FacesServlet facesServlet = new FacesServlet();
facesServlet.service(request, response);
return;
}
if (path.endsWith(".class")) {
response.sendError(403, path + " denied");
return;
}
/* find the resource */
log.info("Looking for " + path + " on the classpath");
//response.sendError(404, path + " not found on classpath");
log.info("found " + path + " on the classpath:"+resource.toString());
/* check modification date */
URLConnection connection = resource.openConnection();
long lastModified = connection.getLastModified();
long ifModifiedSince = request.getDateHeader("If-Modified-Since");
if (ifModifiedSince != -1 && lastModified <= ifModifiedSince) {
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
}
/* write to response */
response.setContentType(getServletContext().getMimeType(path));
OutputStream out = new BufferedOutputStream(
response.getOutputStream(), 512);
InputStream in = new BufferedInputStream(
resource.openStream(), 512);
try {
int len;
byte[] data = new byte[512];
while ((len = in.read(data)) != -1) {
out.write(data, 0, len);
}
} finally {
out.close();
in.close();
if (connection.getInputStream() != null) {
connection.getInputStream().close();
}
}
} /* doGet() */
@Override
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
doGet(request, response);
}
}
如果您想从罐子中装载滤饼，则可以使用Custom DefaultResourceResolver
if you want to load faclets from a jar you could use a Custom DefaultResourceResolver
/**
* Används för hämta hämta xhtml filer från jar filen
* @author ldc-jha
*
*/
public class ClassletsResourceResolver extends DefaultResourceResolver implements ResourceResolver{
public ClassletsResourceResolver() {
super();
}
private static final String PREFIX = "/framework/";
private static final String LAYOUT = "/layout/";
public String getPrefix() {
return PREFIX;
}
public URL resolveUrl(String path) {
final String prefix = getPrefix();
System.out.println("resolveUrl()"+path);
URL url = null;
if (path != null && path.startsWith(PREFIX)) {
final String resource = path.substring(PREFIX.length());
url = getClass().getClassLoader().getResource("xhtml/framework/"+resource);
}
if (path != null && path.startsWith(LAYOUT)) {
System.out.println("LAYOUT:"+path);
url = getClass().getClassLoader().getResource("xhtml/framework"+path);
System.out.println(url);
}
if(url != null){
return url;
}
else
{
return super.resolveUrl(path);
}
}
}
如果要在不编辑xhtml的情况下加载resourceResolver，则可以执行此操作.
if you want to load the resourceResolver wihtout editing your xhtml you can do this.
@WebListener
public class SimpleServletContextListener implements ServletContextListener{
private static final LogProvider log = Logging.getLogProvider(SimpleServletContextListener.class);
public void contextInitialized(ServletContextEvent event){
event.getServletContext().setAttribute("facelets.RESOURCE_RESOLVER","se.lu.ldc.core.reslover.ClassletsResourceResolver");
}
}
您可能还必须让Seam了解Faclets，如果有任何问题，请告诉我.我有相同的想法，并且可以将所有CSS，XHTML等打包到一个罐中.
You might have to let Seam know about the Faclets as well, let me know if there is any problem. i had the same idea, and got it working with packing all css, xhtml etc in a jar.
这篇关于JSF:从罐子中提供资源的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
