org.eclipse.jetty.webapp.MetaInfConfiguration Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.webapp;
import java.io.File;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.stream.Collectors;
import org.eclipse.jetty.util.PatternMatcher;
import org.eclipse.jetty.util.resource.EmptyResource;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* MetaInfConfiguration
*
*
* Scan META-INF of jars to find:
*
* - tlds
* - web-fragment.xml
* - resources
*
*
* The jars which are scanned are:
*
* - those from the container classpath whose pattern matched the WebInfConfiguration.CONTAINER_JAR_PATTERN
* - those from WEB-INF/lib
*
*/
public class MetaInfConfiguration extends AbstractConfiguration
{
private static final Logger LOG = LoggerFactory.getLogger(MetaInfConfiguration.class);
public static final String USE_CONTAINER_METAINF_CACHE = "org.eclipse.jetty.metainf.useCache";
public static final boolean DEFAULT_USE_CONTAINER_METAINF_CACHE = true;
public static final String CACHED_CONTAINER_TLDS = "org.eclipse.jetty.tlds.cache";
public static final String CACHED_CONTAINER_FRAGMENTS = FragmentConfiguration.FRAGMENT_RESOURCES + ".cache";
public static final String CACHED_CONTAINER_RESOURCES = "org.eclipse.jetty.resources.cache";
public static final String METAINF_TLDS = "org.eclipse.jetty.tlds";
public static final String METAINF_FRAGMENTS = FragmentConfiguration.FRAGMENT_RESOURCES;
public static final String METAINF_RESOURCES = "org.eclipse.jetty.resources";
public static final String CONTAINER_JAR_PATTERN = "org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern";
public static final String WEBINF_JAR_PATTERN = "org.eclipse.jetty.server.webapp.WebInfIncludeJarPattern";
public static final List __allScanTypes = (List)Arrays.asList(METAINF_TLDS, METAINF_RESOURCES, METAINF_FRAGMENTS);
/**
* ContainerPathNameMatcher
*
* Matches names of jars on the container classpath
* against a pattern. If no pattern is specified, no
* jars match.
*/
public class ContainerPathNameMatcher extends PatternMatcher
{
protected final WebAppContext _context;
protected final String _pattern;
public ContainerPathNameMatcher(WebAppContext context, String pattern)
{
if (context == null)
throw new IllegalArgumentException("Context null");
_context = context;
_pattern = pattern;
}
public void match(List uris) throws Exception
{
if (uris == null)
return;
match(_pattern, uris.toArray(new URI[uris.size()]), false);
}
@Override
public void matched(URI uri) throws Exception
{
_context.getMetaData().addContainerResource(Resource.newResource(uri));
}
}
/**
* WebAppPathNameMatcher
*
* Matches names of jars or dirs on the webapp classpath
* against a pattern. If there is no pattern, all jars or dirs
* will match.
*/
public class WebAppPathNameMatcher extends PatternMatcher
{
protected final WebAppContext _context;
protected final String _pattern;
public WebAppPathNameMatcher(WebAppContext context, String pattern)
{
if (context == null)
throw new IllegalArgumentException("Context null");
_context = context;
_pattern = pattern;
}
public void match(List uris)
throws Exception
{
match(_pattern, uris.toArray(new URI[uris.size()]), true);
}
@Override
public void matched(URI uri) throws Exception
{
_context.getMetaData().addWebInfResource(Resource.newResource(uri));
}
}
/**
* If set, to a list of URLs, these resources are added to the context
* resource base as a resource collection.
*/
public static final String RESOURCE_DIRS = "org.eclipse.jetty.resources";
public MetaInfConfiguration()
{
addDependencies(WebXmlConfiguration.class);
}
@Override
public void preConfigure(final WebAppContext context) throws Exception
{
//find container jars/modules and select which ones to scan
findAndFilterContainerPaths(context);
//find web-app jars and select which ones to scan
findAndFilterWebAppPaths(context);
//No pattern to appy to classes, just add to metadata
context.getMetaData().setWebInfClassesResources(findClassDirs(context));
scanJars(context);
}
/**
* Find jars and directories that are on the container's classpath
* and apply an optional filter. The filter is a pattern applied to the
* full jar or directory names. If there is no pattern, then no jar
* or dir is considered to match.
*
* Those jars that do match will be later examined for META-INF
* information and annotations.
*
* To find them, examine the classloaders in the hierarchy above the
* webapp classloader that are URLClassLoaders. For jdk-9 we also
* look at the java.class.path, and the jdk.module.path.
*
* @param context the WebAppContext being deployed
*/
public void findAndFilterContainerPaths(final WebAppContext context) throws Exception
{
// Apply an initial name filter to the jars to select which will be eventually
// scanned for META-INF info and annotations. The filter is based on inclusion patterns.
ContainerPathNameMatcher containerPathNameMatcher = new ContainerPathNameMatcher(context, (String)context.getAttribute(CONTAINER_JAR_PATTERN));
List containerUris = getAllContainerJars(context);
if (LOG.isDebugEnabled())
LOG.debug("Matching container urls {}", containerUris);
containerPathNameMatcher.match(containerUris);
// When running on jvm 9 or above, we we won't be able to look at the application
// classloader to extract urls, so we need to examine the classpath instead.
String classPath = System.getProperty("java.class.path");
if (classPath != null)
{
List cpUris = new ArrayList<>();
String[] entries = classPath.split(File.pathSeparator);
for (String entry : entries)
{
File f = new File(entry);
cpUris.add(f.toURI());
}
if (LOG.isDebugEnabled())
LOG.debug("Matching java.class.path {}", cpUris);
containerPathNameMatcher.match(cpUris);
}
// We also need to examine the module path.
// TODO need to consider the jdk.module.upgrade.path - how to resolve
// which modules will be actually used. If its possible, it can
// only be attempted in jetty-10 with jdk-9 specific apis.
String modulePath = System.getProperty("jdk.module.path");
if (modulePath != null)
{
List moduleUris = new ArrayList<>();
String[] entries = modulePath.split(File.pathSeparator);
for (String entry : entries)
{
File file = new File(entry);
if (file.isDirectory())
{
File[] files = file.listFiles();
if (files != null)
{
for (File f : files)
{
moduleUris.add(f.toURI());
}
}
}
else
{
moduleUris.add(file.toURI());
}
}
if (LOG.isDebugEnabled())
LOG.debug("Matching jdk.module.path {}", moduleUris);
containerPathNameMatcher.match(moduleUris);
}
if (LOG.isDebugEnabled())
LOG.debug("Container paths selected:{}", context.getMetaData().getContainerResources());
}
/**
* Finds the jars that are either physically or virtually in
* WEB-INF/lib, and applies an optional filter to their full
* pathnames.
*
* The filter selects which jars will later be examined for META-INF
* information and annotations. If there is no pattern, then
* all jars are considered selected.
*
* @param context the WebAppContext being deployed
*/
public void findAndFilterWebAppPaths(WebAppContext context)
throws Exception
{
//Apply filter to WEB-INF/lib jars
WebAppPathNameMatcher matcher = new WebAppPathNameMatcher(context, (String)context.getAttribute(WEBINF_JAR_PATTERN));
List jars = findJars(context);
//Convert to uris for matching
if (jars != null)
{
List uris = new ArrayList<>();
int i = 0;
for (Resource r : jars)
{
uris.add(r.getURI());
}
matcher.match(uris);
}
}
protected List getAllContainerJars(final WebAppContext context) throws URISyntaxException
{
List uris = new ArrayList<>();
if (context.getClassLoader() != null)
{
ClassLoader loader = context.getClassLoader().getParent();
while (loader != null)
{
if (loader instanceof URLClassLoader)
{
URL[] urls = ((URLClassLoader)loader).getURLs();
if (urls != null)
for (URL url : urls)
{
uris.add(new URI(url.toString().replaceAll(" ", "%20")));
}
}
loader = loader.getParent();
}
}
return uris;
}
@Override
public void configure(WebAppContext context) throws Exception
{
// Look for extra resource
@SuppressWarnings("unchecked")
Set resources = (Set)context.getAttribute(RESOURCE_DIRS);
if (resources != null && !resources.isEmpty())
{
Resource[] collection = new Resource[resources.size() + 1];
int i = 0;
collection[i++] = context.getBaseResource();
for (Resource resource : resources)
{
collection[i++] = resource;
}
context.setBaseResource(new ResourceCollection(collection));
}
}
protected void scanJars(WebAppContext context) throws Exception
{
boolean useContainerCache = DEFAULT_USE_CONTAINER_METAINF_CACHE;
if (context.getServer() != null)
{
Boolean attr = (Boolean)context.getServer().getAttribute(USE_CONTAINER_METAINF_CACHE);
if (attr != null)
useContainerCache = attr.booleanValue();
}
if (LOG.isDebugEnabled())
LOG.debug("{} = {}", USE_CONTAINER_METAINF_CACHE, useContainerCache);
//pre-emptively create empty lists for tlds, fragments and resources as context attributes
//this signals that this class has been called. This differentiates the case where this class
//has been called but finds no META-INF data from the case where this class was never called
if (context.getAttribute(METAINF_TLDS) == null)
context.setAttribute(METAINF_TLDS, new HashSet());
if (context.getAttribute(METAINF_RESOURCES) == null)
context.setAttribute(METAINF_RESOURCES, new HashSet());
if (context.getAttribute(METAINF_FRAGMENTS) == null)
context.setAttribute(METAINF_FRAGMENTS, new HashMap());
//always scan everything from the container's classpath
scanJars(context, context.getMetaData().getContainerResources(), useContainerCache, __allScanTypes);
//only look for fragments if web.xml is not metadata complete, or it version 3.0 or greater
List scanTypes = new ArrayList<>(__allScanTypes);
if (context.getMetaData().isMetaDataComplete() || (context.getServletContext().getEffectiveMajorVersion() < 3) && !context.isConfigurationDiscovered())
scanTypes.remove(METAINF_FRAGMENTS);
scanJars(context, context.getMetaData().getWebInfResources(false), false, scanTypes);
}
/**
* For backwards compatibility. This method will always scan for all types of data.
*
* @param context the context for the scan
* @param jars the jars to scan
* @param useCaches if true, the scanned info is cached
* @throws Exception if unable to scan the jars
*/
public void scanJars(final WebAppContext context, Collection jars, boolean useCaches)
throws Exception
{
scanJars(context, jars, useCaches, __allScanTypes);
}
/**
* Look into the jars to discover info in META-INF. If useCaches == true, then we will
* cache the info discovered indexed by the jar in which it was discovered: this speeds
* up subsequent context deployments.
*
* @param context the context for the scan
* @param jars the jars resources to scan
* @param useCaches if true, cache the info discovered
* @param scanTypes the type of things to look for in the jars
* @throws Exception if unable to scan the jars
*/
public void scanJars(final WebAppContext context, Collection jars, boolean useCaches, List scanTypes)
throws Exception
{
ConcurrentHashMap metaInfResourceCache = null;
ConcurrentHashMap metaInfFragmentCache = null;
ConcurrentHashMap> metaInfTldCache = null;
if (useCaches)
{
metaInfResourceCache = (ConcurrentHashMap)context.getServer().getAttribute(CACHED_CONTAINER_RESOURCES);
if (metaInfResourceCache == null)
{
metaInfResourceCache = new ConcurrentHashMap();
context.getServer().setAttribute(CACHED_CONTAINER_RESOURCES, metaInfResourceCache);
}
metaInfFragmentCache = (ConcurrentHashMap)context.getServer().getAttribute(CACHED_CONTAINER_FRAGMENTS);
if (metaInfFragmentCache == null)
{
metaInfFragmentCache = new ConcurrentHashMap();
context.getServer().setAttribute(CACHED_CONTAINER_FRAGMENTS, metaInfFragmentCache);
}
metaInfTldCache = (ConcurrentHashMap>)context.getServer().getAttribute(CACHED_CONTAINER_TLDS);
if (metaInfTldCache == null)
{
metaInfTldCache = new ConcurrentHashMap>();
context.getServer().setAttribute(CACHED_CONTAINER_TLDS, metaInfTldCache);
}
}
//Scan jars for META-INF information
if (jars != null)
{
for (Resource r : jars)
{
if (scanTypes.contains(METAINF_RESOURCES))
scanForResources(context, r, metaInfResourceCache);
if (scanTypes.contains(METAINF_FRAGMENTS))
scanForFragment(context, r, metaInfFragmentCache);
if (scanTypes.contains(METAINF_TLDS))
scanForTlds(context, r, metaInfTldCache);
}
}
}
/**
* Scan for META-INF/resources dir in the given jar.
*
* @param context the context for the scan
* @param target the target resource to scan for
* @param cache the resource cache
* @throws Exception if unable to scan for resources
*/
public void scanForResources(WebAppContext context, Resource target, ConcurrentHashMap cache)
throws Exception
{
Resource resourcesDir = null;
if (cache != null && cache.containsKey(target))
{
resourcesDir = cache.get(target);
if (resourcesDir == EmptyResource.INSTANCE)
{
if (LOG.isDebugEnabled())
LOG.debug("{} cached as containing no META-INF/resources", target);
return;
}
else if (LOG.isDebugEnabled())
LOG.debug("{} META-INF/resources found in cache ", target);
}
else
{
//not using caches or not in the cache so check for the resources dir
if (LOG.isDebugEnabled())
LOG.debug("{} META-INF/resources checked", target);
if (target.isDirectory())
{
//TODO think how to handle an unpacked jar file (eg for osgi)
resourcesDir = target.addPath("/META-INF/resources");
}
else
{
//Resource represents a packed jar
URI uri = target.getURI();
resourcesDir = Resource.newResource(uriJarPrefix(uri, "!/META-INF/resources"));
}
if (!resourcesDir.exists() || !resourcesDir.isDirectory())
{
resourcesDir.close();
resourcesDir = EmptyResource.INSTANCE;
}
if (cache != null)
{
Resource old = cache.putIfAbsent(target, resourcesDir);
if (old != null)
resourcesDir = old;
else if (LOG.isDebugEnabled())
LOG.debug("{} META-INF/resources cache updated", target);
}
if (resourcesDir == EmptyResource.INSTANCE)
{
return;
}
}
//add it to the meta inf resources for this context
Set dirs = (Set)context.getAttribute(METAINF_RESOURCES);
if (dirs == null)
{
dirs = new HashSet();
context.setAttribute(METAINF_RESOURCES, dirs);
}
if (LOG.isDebugEnabled())
LOG.debug("{} added to context", resourcesDir);
dirs.add(resourcesDir);
}
/**
* Scan for META-INF/web-fragment.xml file in the given jar.
*
* @param context the context for the scan
* @param jar the jar resource to scan for fragements in
* @param cache the resource cache
* @throws Exception if unable to scan for fragments
*/
public void scanForFragment(WebAppContext context, Resource jar, ConcurrentHashMap cache)
throws Exception
{
Resource webFrag = null;
if (cache != null && cache.containsKey(jar))
{
webFrag = cache.get(jar);
if (webFrag == EmptyResource.INSTANCE)
{
if (LOG.isDebugEnabled())
LOG.debug("{} cached as containing no META-INF/web-fragment.xml", jar);
return;
}
else if (LOG.isDebugEnabled())
LOG.debug("{} META-INF/web-fragment.xml found in cache ", jar);
}
else
{
//not using caches or not in the cache so check for the web-fragment.xml
if (LOG.isDebugEnabled())
LOG.debug("{} META-INF/web-fragment.xml checked", jar);
if (jar.isDirectory())
{
webFrag = Resource.newResource(new File(jar.getFile(), "/META-INF/web-fragment.xml"));
}
else
{
URI uri = jar.getURI();
webFrag = Resource.newResource(uriJarPrefix(uri, "!/META-INF/web-fragment.xml"));
}
if (!webFrag.exists() || webFrag.isDirectory())
{
webFrag.close();
webFrag = EmptyResource.INSTANCE;
}
if (cache != null)
{
//web-fragment.xml doesn't exist: put token in cache to signal we've seen the jar
Resource old = cache.putIfAbsent(jar, webFrag);
if (old != null)
webFrag = old;
else if (LOG.isDebugEnabled())
LOG.debug("{} META-INF/web-fragment.xml cache updated", jar);
}
if (webFrag == EmptyResource.INSTANCE)
return;
}
Map fragments = (Map)context.getAttribute(METAINF_FRAGMENTS);
if (fragments == null)
{
fragments = new HashMap();
context.setAttribute(METAINF_FRAGMENTS, fragments);
}
fragments.put(jar, webFrag);
if (LOG.isDebugEnabled())
LOG.debug("{} added to context", webFrag);
}
/**
* Discover META-INF/*.tld files in the given jar
*
* @param context the context for the scan
* @param jar the jar resources to scan tlds for
* @param cache the resource cache
* @throws Exception if unable to scan for tlds
*/
public void scanForTlds(WebAppContext context, Resource jar, ConcurrentHashMap> cache)
throws Exception
{
Collection tlds = null;
if (cache != null && cache.containsKey(jar))
{
Collection tmp = cache.get(jar);
if (tmp.isEmpty())
{
if (LOG.isDebugEnabled())
LOG.debug("{} cached as containing no tlds", jar);
return;
}
else
{
tlds = tmp;
if (LOG.isDebugEnabled())
LOG.debug("{} tlds found in cache ", jar);
}
}
else
{
//not using caches or not in the cache so find all tlds
tlds = new HashSet();
if (jar.isDirectory())
{
tlds.addAll(getTlds(jar.getFile()));
}
else
{
URI uri = jar.getURI();
tlds.addAll(getTlds(uri));
}
if (cache != null)
{
if (LOG.isDebugEnabled())
LOG.debug("{} tld cache updated", jar);
Collection old = (Collection)cache.putIfAbsent(jar, tlds);
if (old != null)
tlds = old;
}
if (tlds.isEmpty())
return;
}
Collection metaInfTlds = (Collection)context.getAttribute(METAINF_TLDS);
if (metaInfTlds == null)
{
metaInfTlds = new HashSet();
context.setAttribute(METAINF_TLDS, metaInfTlds);
}
metaInfTlds.addAll(tlds);
if (LOG.isDebugEnabled())
LOG.debug("tlds added to context");
}
@Override
public void postConfigure(WebAppContext context) throws Exception
{
context.setAttribute(METAINF_RESOURCES, null);
context.setAttribute(METAINF_FRAGMENTS, null);
context.setAttribute(METAINF_TLDS, null);
}
/**
* Find all .tld files in all subdirs of the given dir.
*
* @param dir the directory to scan
* @return the list of tlds found
* @throws IOException if unable to scan the directory
*/
public Collection getTlds(File dir) throws IOException
{
if (dir == null || !dir.isDirectory())
return Collections.emptySet();
HashSet tlds = new HashSet();
File[] files = dir.listFiles();
if (files != null)
{
for (File f : files)
{
if (f.isDirectory())
tlds.addAll(getTlds(f));
else
{
String name = f.getCanonicalPath();
if (name.contains("META-INF") && name.endsWith(".tld"))
tlds.add(f.toURI().toURL());
}
}
}
return tlds;
}
/**
* Find all .tld files in the given jar.
*
* @param uri the uri to jar file
* @return the collection of tlds as url references
* @throws IOException if unable to scan the jar file
*/
public Collection getTlds(URI uri) throws IOException
{
HashSet tlds = new HashSet();
String jarUri = uriJarPrefix(uri, "!/");
URL url = new URL(jarUri);
JarURLConnection jarConn = (JarURLConnection)url.openConnection();
jarConn.setUseCaches(Resource.getDefaultUseCaches());
JarFile jarFile = jarConn.getJarFile();
Enumeration entries = jarFile.entries();
while (entries.hasMoreElements())
{
JarEntry e = entries.nextElement();
String name = e.getName();
if (name.startsWith("META-INF") && name.endsWith(".tld"))
{
tlds.add(new URL(jarUri + name));
}
}
if (!Resource.getDefaultUseCaches())
jarFile.close();
return tlds;
}
protected List findClassDirs(WebAppContext context)
throws Exception
{
if (context == null)
return null;
List classDirs = new ArrayList();
Resource webInfClasses = findWebInfClassesDir(context);
if (webInfClasses != null)
classDirs.add(webInfClasses);
List extraClassDirs = findExtraClasspathDirs(context);
if (extraClassDirs != null)
classDirs.addAll(extraClassDirs);
return classDirs;
}
/**
* Look for jars that should be treated as if they are in WEB-INF/lib
*
* @param context the context to find the jars in
* @return the list of jar resources found within context
* @throws Exception if unable to find the jars
*/
protected List findJars(WebAppContext context)
throws Exception
{
List jarResources = new ArrayList();
List webInfLibJars = findWebInfLibJars(context);
if (webInfLibJars != null)
jarResources.addAll(webInfLibJars);
List extraClasspathJars = findExtraClasspathJars(context);
if (extraClasspathJars != null)
jarResources.addAll(extraClasspathJars);
return jarResources;
}
/**
* Look for jars in WEB-INF/lib
*
* @param context the context to find the lib jars in
* @return the list of jars as {@link Resource}
* @throws Exception if unable to scan for lib jars
*/
protected List findWebInfLibJars(WebAppContext context)
throws Exception
{
Resource webInf = context.getWebInf();
if (webInf == null || !webInf.exists())
return null;
List jarResources = new ArrayList();
Resource webInfLib = webInf.addPath("/lib");
if (webInfLib.exists() && webInfLib.isDirectory())
{
String[] files = webInfLib.list();
if (files != null)
{
Arrays.sort(files);
}
for (int f = 0; files != null && f < files.length; f++)
{
try
{
Resource file = webInfLib.addPath(files[f]);
String fnlc = file.getName().toLowerCase(Locale.ENGLISH);
int dot = fnlc.lastIndexOf('.');
String extension = (dot < 0 ? null : fnlc.substring(dot));
if (extension != null && (extension.equals(".jar") || extension.equals(".zip")))
{
jarResources.add(file);
}
}
catch (Exception ex)
{
LOG.warn("Unable to load WEB-INF file {}", files[f], ex);
}
}
}
return jarResources;
}
/**
* Get jars from WebAppContext.getExtraClasspath as resources
*
* @param context the context to find extra classpath jars in
* @return the list of Resources with the extra classpath, or null if not found
* @throws Exception if unable to resolve the extra classpath jars
*/
protected List findExtraClasspathJars(WebAppContext context)
throws Exception
{
if (context == null || context.getExtraClasspath() == null)
return null;
return context.getExtraClasspath()
.stream()
.filter(this::isFileSupported)
.collect(Collectors.toList());
}
/**
* Get WEB-INF/classes dir
*
* @param context the context to look for the WEB-INF/classes directory
* @return the Resource for the WEB-INF/classes directory
* @throws Exception if unable to find the WEB-INF/classes directory
*/
protected Resource findWebInfClassesDir(WebAppContext context)
throws Exception
{
if (context == null)
return null;
Resource webInf = context.getWebInf();
// Find WEB-INF/classes
if (webInf != null && webInf.isDirectory())
{
// Look for classes directory
Resource classes = webInf.addPath("classes/");
if (classes.exists())
return classes;
}
return null;
}
/**
* Get class dirs from WebAppContext.getExtraClasspath as resources
*
* @param context the context to look for extra classpaths in
* @return the list of Resources to the extra classpath
* @throws Exception if unable to resolve the extra classpath resources
*/
protected List findExtraClasspathDirs(WebAppContext context)
throws Exception
{
if (context == null || context.getExtraClasspath() == null)
return null;
return context.getExtraClasspath()
.stream()
.filter(Resource::isDirectory)
.collect(Collectors.toList());
}
private String uriJarPrefix(URI uri, String suffix)
{
String uriString = uri.toString();
if (uriString.startsWith("jar:"))
{
return uriString + suffix;
}
else
{
return "jar:" + uriString + suffix;
}
}
private boolean isFileSupported(Resource resource)
{
try
{
if (resource.isDirectory())
return false;
if (resource.getFile() == null)
return false;
}
catch (Throwable t)
{
if (LOG.isDebugEnabled())
LOG.debug("Bad Resource reference: {}", resource, t);
return false;
}
String filenameLowercase = resource.getName().toLowerCase(Locale.ENGLISH);
int dot = filenameLowercase.lastIndexOf('.');
String extension = (dot < 0 ? null : filenameLowercase.substring(dot));
return (extension != null && (extension.equals(".jar") || extension.equals(".zip")));
}
}