org.eclipse.jetty.webapp.WebInfConfiguration Maven / Gradle / Ivy
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//
// ========================================================================
// 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.URI;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Locale;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.NetworkConnector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.resource.JarFileResource;
import org.eclipse.jetty.util.resource.JarResource;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class WebInfConfiguration extends AbstractConfiguration
{
private static final Logger LOG = LoggerFactory.getLogger(WebInfConfiguration.class);
public static final String TEMPDIR_CONFIGURED = "org.eclipse.jetty.tmpdirConfigured";
public static final String TEMPORARY_RESOURCE_BASE = "org.eclipse.jetty.webapp.tmpResourceBase";
protected Resource _preUnpackBaseResource;
public WebInfConfiguration()
{
}
@Override
public void preConfigure(final WebAppContext context) throws Exception
{
// Make a temp directory for the webapp if one is not already set
resolveTempDirectory(context);
// Extract webapp if necessary
unpack(context);
}
@Override
public void configure(WebAppContext context) throws Exception
{
Resource webInf = context.getWebInf();
// Add WEB-INF classes and lib classpaths
if (webInf != null && webInf.isDirectory() && context.getClassLoader() instanceof WebAppClassLoader)
{
// Look for classes directory
Resource classes = webInf.addPath("classes/");
if (classes.exists())
((WebAppClassLoader)context.getClassLoader()).addClassPath(classes);
// Look for jars
Resource lib = webInf.addPath("lib/");
if (lib.exists() || lib.isDirectory())
((WebAppClassLoader)context.getClassLoader()).addJars(lib);
}
}
@Override
public void deconfigure(WebAppContext context) throws Exception
{
File tempDirectory = context.getTempDirectory();
// if we're not persisting the temp dir contents delete it
if (!context.isPersistTempDirectory())
{
IO.delete(tempDirectory);
}
//if it wasn't explicitly configured by the user, then unset it
Boolean tmpdirConfigured = (Boolean)context.getAttribute(TEMPDIR_CONFIGURED);
if (tmpdirConfigured != null && !tmpdirConfigured)
context.setTempDirectory(null);
//reset the base resource back to what it was before we did any unpacking of resources
if (context.getBaseResource() != null)
context.getBaseResource().close();
context.setBaseResource(_preUnpackBaseResource);
}
@Override
public void cloneConfigure(WebAppContext template, WebAppContext context) throws Exception
{
Path tmpDir = Files.createTempDirectory(template.getTempDirectory().getParentFile().toPath(), WebInfConfiguration.getCanonicalNameForWebAppTmpDir(context));
File tmpDirAsFile = tmpDir.toFile();
tmpDirAsFile.deleteOnExit();
context.setTempDirectory(tmpDirAsFile);
}
/**
* Get a temporary directory in which to unpack the war etc etc.
* The algorithm for determining this is to check these alternatives
* in the order shown:
*
* A. Try to use an explicit directory specifically for this webapp:
*
* -
* Iff an explicit directory is set for this webapp, use it. Set delete on
* exit depends on value of persistTempDirectory.
*
* -
* Iff javax.servlet.context.tempdir context attribute is set for
* this webapp && exists && writeable, then use it. Set delete on exit depends on
* value of persistTempDirectory.
*
*
*
*
* B. Create a directory based on global settings. The new directory
* will be called "Jetty-"+host+"-"+port+"__"+context+"-"+virtualhost+"-"+randomdigits+".dir"
*
* If the user has specified the context attribute org.eclipse.jetty.webapp.basetempdir, the
* directory specified by this attribute will be the parent of the temp dir created. Otherwise,
* the parent dir is ${java.io.tmpdir}. Set delete on exit depends on value of persistTempDirectory.
*
* @param context the context to resolve the temp directory from
* @throws Exception if unable to resolve the temp directory
*/
public void resolveTempDirectory(WebAppContext context)
throws Exception
{
//If a tmp directory is already set we should use it
File tmpDir = context.getTempDirectory();
if (tmpDir != null)
{
configureTempDirectory(tmpDir, context);
context.setAttribute(TEMPDIR_CONFIGURED, Boolean.TRUE); //the tmp dir was set explicitly
return;
}
// No temp directory configured, try to establish one via the javax.servlet.context.tempdir.
File servletTmpDir = asFile(context.getAttribute(WebAppContext.TEMPDIR));
if (servletTmpDir != null)
{
// Use as tmpDir
tmpDir = servletTmpDir;
configureTempDirectory(tmpDir, context);
// Ensure Attribute has File object
context.setAttribute(WebAppContext.TEMPDIR, tmpDir);
// Set as TempDir in context.
context.setTempDirectory(tmpDir);
return;
}
//We need to make a temp dir. Check if the user has set a directory to use instead
//of java.io.tmpdir as the parent of the dir
File baseTemp = asFile(context.getAttribute(WebAppContext.BASETEMPDIR));
if (baseTemp != null)
{
if (!baseTemp.isDirectory() || !baseTemp.canWrite())
throw new IllegalStateException(WebAppContext.BASETEMPDIR + " is not a writable directory");
//Make a temp directory as a child of the given base dir
makeTempDirectory(baseTemp, context);
return;
}
//Look for a directory named "work" in ${jetty.base} and
//treat it as parent of a new temp dir (which we will persist)
File jettyBase = asFile(System.getProperty("jetty.base"));
if (jettyBase != null)
{
File work = new File(jettyBase, "work");
if (work.exists() && work.isDirectory() && work.canWrite())
{
context.setPersistTempDirectory(true);
makeTempDirectory(work, context);
return;
}
}
//Make a temp directory in java.io.tmpdir
makeTempDirectory(new File(System.getProperty("java.io.tmpdir")), context);
}
/**
* Given an Object, return File reference for object.
* Typically used to convert anonymous Object from getAttribute() calls to a File object.
*
* @param fileattr the file attribute to analyze and return from (supports type File, Path, and String).
* @return the File object if it can be converted otherwise null.
*/
private File asFile(Object fileattr)
{
if (fileattr == null)
return null;
if (fileattr instanceof File)
return (File)fileattr;
if (fileattr instanceof String)
return new File((String)fileattr);
if (fileattr instanceof Path)
return ((Path)fileattr).toFile();
return null;
}
public void makeTempDirectory(File parent, WebAppContext context)
throws Exception
{
if (parent == null || !parent.exists() || !parent.canWrite() || !parent.isDirectory())
throw new IllegalStateException("Parent for temp dir not configured correctly: " + (parent == null ? "null" : "writeable=" + parent.canWrite()));
//Create a name for the webapp
String temp = getCanonicalNameForWebAppTmpDir(context);
File tmpDir = null;
if (context.isPersistTempDirectory())
{
//if it is to be persisted, make sure it will be the same name
//by not using File.createTempFile, which appends random digits
tmpDir = new File(parent, temp);
configureTempDirectory(tmpDir, context);
}
else
{
// ensure dir will always be unique by having classlib generate random path name
tmpDir = Files.createTempDirectory(parent.toPath(), temp).toFile();
tmpDir.deleteOnExit();
ensureTempDirUsable(tmpDir);
}
if (LOG.isDebugEnabled())
LOG.debug("Set temp dir {}", tmpDir);
context.setTempDirectory(tmpDir);
}
public void configureTempDirectory(File dir, WebAppContext context)
{
if (dir == null)
throw new IllegalArgumentException("Null temp dir");
// if dir exists and we don't want it persisted, delete it
if (!context.isPersistTempDirectory() && dir.exists() && !IO.delete(dir))
{
throw new IllegalStateException("Failed to delete temp dir " + dir);
}
// if it doesn't exist make it
if (!dir.exists())
{
if (!dir.mkdirs())
{
throw new IllegalStateException("Unable to create temp dir " + dir);
}
}
if (!context.isPersistTempDirectory())
dir.deleteOnExit();
ensureTempDirUsable(dir);
}
private void ensureTempDirUsable(File dir)
{
// is it useable
if (!dir.canWrite() || !dir.isDirectory())
throw new IllegalStateException("Temp dir " + dir + " not useable: writeable=" + dir.canWrite() + ", dir=" + dir.isDirectory());
}
public void unpack(WebAppContext context) throws IOException
{
Resource webApp = context.getBaseResource();
_preUnpackBaseResource = context.getBaseResource();
if (webApp == null)
{
String war = context.getWar();
if (war != null && war.length() > 0)
webApp = context.newResource(war);
else
webApp = context.getBaseResource();
if (webApp == null)
throw new IllegalStateException("No resourceBase or war set for context");
// Accept aliases for WAR files
if (webApp.isAlias())
{
if (LOG.isDebugEnabled())
LOG.debug("{} anti-aliased to {}", webApp, webApp.getAlias());
webApp = context.newResource(webApp.getAlias());
}
if (LOG.isDebugEnabled())
LOG.debug("Try webapp={} exists={} directory={} file={}", webApp, webApp.exists(), webApp.isDirectory(), webApp.getFile());
// Track the original web_app Resource, as this could be a PathResource.
// Later steps force the Resource to be a JarFileResource, which introduces
// URLConnection caches in such a way that it prevents Hot Redeployment
// on MS Windows.
Resource originalWarResource = webApp;
// Is the WAR usable directly?
if (webApp.exists() && !webApp.isDirectory() && !webApp.toString().startsWith("jar:"))
{
// No - then lets see if it can be turned into a jar URL.
Resource jarWebApp = JarResource.newJarResource(webApp);
if (jarWebApp.exists() && jarWebApp.isDirectory())
webApp = jarWebApp;
}
// If we should extract or the URL is still not usable
if (webApp.exists() && (
(context.isCopyWebDir() && webApp.getFile() != null && webApp.getFile().isDirectory()) ||
(context.isExtractWAR() && webApp.getFile() != null && !webApp.getFile().isDirectory()) ||
(context.isExtractWAR() && webApp.getFile() == null) ||
!webApp.isDirectory())
)
{
// Look for sibling directory.
File extractedWebAppDir = null;
if (war != null)
{
// look for a sibling like "foo/" to a "foo.war"
File warfile = Resource.newResource(war).getFile();
if (warfile != null && warfile.getName().toLowerCase(Locale.ENGLISH).endsWith(".war"))
{
File sibling = new File(warfile.getParent(), warfile.getName().substring(0, warfile.getName().length() - 4));
if (sibling.exists() && sibling.isDirectory() && sibling.canWrite())
extractedWebAppDir = sibling;
}
}
if (extractedWebAppDir == null)
{
// Then extract it if necessary to the temporary location
extractedWebAppDir = new File(context.getTempDirectory(), "webapp");
context.setAttribute(TEMPORARY_RESOURCE_BASE, extractedWebAppDir);
}
if (webApp.getFile() != null && webApp.getFile().isDirectory())
{
// Copy directory
if (LOG.isDebugEnabled())
LOG.debug("Copy {} to {}", webApp, extractedWebAppDir);
webApp.copyTo(extractedWebAppDir);
}
else
{
//Use a sentinel file that will exist only whilst the extraction is taking place.
//This will help us detect interrupted extractions.
File extractionLock = new File(context.getTempDirectory(), ".extract_lock");
if (!extractedWebAppDir.exists())
{
//it hasn't been extracted before so extract it
extractionLock.createNewFile();
extractedWebAppDir.mkdir();
if (LOG.isDebugEnabled())
LOG.debug("Extract {} to {}", webApp, extractedWebAppDir);
Resource jarWebApp = JarResource.newJarResource(webApp);
jarWebApp.copyTo(extractedWebAppDir);
extractionLock.delete();
}
else
{
// Only extract if the war file is newer, or a .extract_lock file is left behind meaning a possible partial extraction
// Use the original War Resource to obtain lastModified to avoid filesystem locks on MS Windows.
if (originalWarResource.lastModified() > extractedWebAppDir.lastModified() || extractionLock.exists())
{
extractionLock.createNewFile();
IO.delete(extractedWebAppDir);
extractedWebAppDir.mkdir();
if (LOG.isDebugEnabled())
LOG.debug("Extract {} to {}", webApp, extractedWebAppDir);
Resource jarWebApp = JarResource.newJarResource(webApp);
jarWebApp.copyTo(extractedWebAppDir);
extractionLock.delete();
}
}
}
webApp = Resource.newResource(extractedWebAppDir.getCanonicalPath());
}
// Now do we have something usable?
if (!webApp.exists() || !webApp.isDirectory())
{
LOG.warn("Web application not found {}", war);
throw new java.io.FileNotFoundException(war);
}
context.setBaseResource(webApp);
if (LOG.isDebugEnabled())
LOG.debug("webapp={}", webApp);
}
// Do we need to extract WEB-INF/lib?
if (context.isCopyWebInf() && !context.isCopyWebDir())
{
Resource webInf = webApp.addPath("WEB-INF/");
File extractedWebInfDir = new File(context.getTempDirectory(), "webinf");
if (extractedWebInfDir.exists())
IO.delete(extractedWebInfDir);
extractedWebInfDir.mkdir();
Resource webInfLib = webInf.addPath("lib/");
File webInfDir = new File(extractedWebInfDir, "WEB-INF");
webInfDir.mkdir();
if (webInfLib.exists())
{
File webInfLibDir = new File(webInfDir, "lib");
if (webInfLibDir.exists())
IO.delete(webInfLibDir);
webInfLibDir.mkdir();
if (LOG.isDebugEnabled())
LOG.debug("Copying WEB-INF/lib {} to {}", webInfLib, webInfLibDir);
webInfLib.copyTo(webInfLibDir);
}
Resource webInfClasses = webInf.addPath("classes/");
if (webInfClasses.exists())
{
File webInfClassesDir = new File(webInfDir, "classes");
if (webInfClassesDir.exists())
IO.delete(webInfClassesDir);
webInfClassesDir.mkdir();
if (LOG.isDebugEnabled())
LOG.debug("Copying WEB-INF/classes from {} to {}", webInfClasses, webInfClassesDir.getAbsolutePath());
webInfClasses.copyTo(webInfClassesDir);
}
webInf = Resource.newResource(extractedWebInfDir.getCanonicalPath());
ResourceCollection rc = new ResourceCollection(webInf, webApp);
if (LOG.isDebugEnabled())
LOG.debug("context.resourcebase={}", rc);
context.setBaseResource(rc);
}
}
/**
* Create a canonical name for a webapp temp directory.
*
* The form of the name is:
*
*
"jetty-"+host+"-"+port+"-"+resourceBase+"-_"+context+"-"+virtualhost+"-"+randomdigits+".dir"
*
* host and port uniquely identify the server
* context and virtual host uniquely identify the webapp
* randomdigits ensure every tmp directory is unique
*
* @param context the context to get the canonical name from
* @return the canonical name for the webapp temp directory
*/
public static String getCanonicalNameForWebAppTmpDir(WebAppContext context)
{
StringBuffer canonicalName = new StringBuffer();
canonicalName.append("jetty-");
//get the host and the port from the first connector
Server server = context.getServer();
if (server != null)
{
Connector[] connectors = context.getServer().getConnectors();
if (connectors.length > 0)
{
//Get the host
String host = null;
int port = 0;
if (connectors != null && (connectors[0] instanceof NetworkConnector))
{
NetworkConnector connector = (NetworkConnector)connectors[0];
host = connector.getHost();
port = connector.getLocalPort();
if (port < 0)
port = connector.getPort();
}
if (host == null)
host = "0.0.0.0";
canonicalName.append(host);
//Get the port
canonicalName.append("-");
//if not available (eg no connectors or connector not started),
//try getting one that was configured.
canonicalName.append(port);
canonicalName.append("-");
}
}
// Resource base
try
{
Resource resource = context.getBaseResource();
if (resource == null)
{
if (context.getWar() == null || context.getWar().length() == 0)
throw new IllegalStateException("No resourceBase or war set for context");
// Set dir or WAR to resource
resource = context.newResource(context.getWar());
}
String resourceBaseName = getResourceBaseName(resource);
canonicalName.append(resourceBaseName);
canonicalName.append("-");
}
catch (Exception e)
{
if (LOG.isDebugEnabled())
LOG.debug("Can't get resource base name", e);
canonicalName.append("-"); // empty resourceBaseName segment
}
//Context name
String contextPath = context.getContextPath();
contextPath = contextPath.replace('/', '_');
contextPath = contextPath.replace('\\', '_');
canonicalName.append(contextPath);
//Virtual host (if there is one)
canonicalName.append("-");
String[] vhosts = context.getVirtualHosts();
if (vhosts == null || vhosts.length <= 0)
canonicalName.append("any");
else
canonicalName.append(vhosts[0]);
// sanitize
for (int i = 0; i < canonicalName.length(); i++)
{
char c = canonicalName.charAt(i);
if (!Character.isJavaIdentifierPart(c) && "-.".indexOf(c) < 0)
canonicalName.setCharAt(i, '.');
}
canonicalName.append("-");
return StringUtil.sanitizeFileSystemName(canonicalName.toString());
}
protected static String getResourceBaseName(Resource resource)
{
// Use File System and File interface if present
try
{
File resourceFile = resource.getFile();
if ((resourceFile != null) && (resource instanceof JarFileResource))
{
resourceFile = ((JarFileResource)resource).getJarFile();
}
if (resourceFile != null)
{
return resourceFile.getName();
}
}
catch (IOException e)
{
if (LOG.isDebugEnabled())
{
LOG.debug("Resource has no File reference: {}", resource);
}
}
// Use URI itself.
URI uri = resource.getURI();
if (uri == null)
{
if (LOG.isDebugEnabled())
{
LOG.debug("Resource has no URI reference: {}", resource);
}
return "";
}
return URIUtil.getUriLastPathSegment(uri);
}
}