//
// ========================================================================
// Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.start;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Stream;
/**
* Interface for initializing a file resource.
*/
public abstract class FileInitializer
{
protected final Set<String> _scheme = new HashSet<>();
protected final BaseHome _basehome;
protected FileInitializer(BaseHome basehome, String... scheme)
{
_basehome = basehome;
if (scheme!=null)
for (String s:scheme)
_scheme.add(s.toLowerCase());
}
public boolean isApplicable(URI uri)
{
if (_scheme.isEmpty())
return uri==null;
return uri!=null && _scheme.contains(uri.getScheme().toLowerCase());
}
/**
* Initialize a file resource
*
* @param uri
* the URI of the resource acting as its source
* @param location
* the simple string reference to the output file, suitable for searching
* for the file in other locations (like ${jetty.home} or ${jetty.dir}) *
* @return true if local file system is modified.
* @throws IOException
* if there was an attempt to initialize, but an error occurred.
*/
public abstract boolean create(URI uri, String location) throws IOException;
public boolean check(URI uri, String location) throws IOException
{
if (location!=null)
{
// Process directly
boolean isDir = location.endsWith("/");
Path destination = getDestination(uri,location);
if (FS.exists(destination))
{
// Validate existence
if (isDir)
{
if (!Files.isDirectory(destination))
{
throw new IOException("Invalid: path should be a directory (but isn't): " + location);
}
if (!FS.canReadDirectory(destination))
{
throw new IOException("Unable to read directory: " + location);
}
}
else
{
if (!FS.canReadFile(destination))
{
throw new IOException("Unable to read file: " + location);
}
}
return true;
}
StartLog.error("Missing Required File: %s",_basehome.toShortForm(location));
return false;
}
return true;
}
protected Path getDestination(URI uri, String location) throws IOException
{
if (location==null)
return null;
Path destination = _basehome.getBasePath(location);
// now on copy/download paths (be safe above all else)
if (destination!=null && !destination.startsWith(_basehome.getBasePath()))
throw new IOException("For security reasons, Jetty start is unable to process file resource not in ${jetty.base} - " + location);
boolean isDestDir = Files.isDirectory(destination) || !Files.exists(destination) && location.endsWith("/");
if (isDestDir && uri!=null && uri.getSchemeSpecificPart().contains("/") && !uri.getSchemeSpecificPart().endsWith("/"))
destination = destination.resolve(uri.getSchemeSpecificPart().substring(uri.getSchemeSpecificPart().lastIndexOf('/')+1));
return destination;
}
protected void download(URI uri, Path destination) throws IOException
{
if (FS.ensureDirectoryExists(destination.getParent()))
StartLog.log("MKDIR",_basehome.toShortForm(destination.getParent()));
StartLog.log("DOWNLD","%s to %s",uri,_basehome.toShortForm(destination));
HttpURLConnection http = (HttpURLConnection)uri.toURL().openConnection();
http.setInstanceFollowRedirects(true);
http.setAllowUserInteraction(false);
int status = http.getResponseCode();
if(status != HttpURLConnection.HTTP_OK)
{
throw new IOException("URL GET Failure [" + status + "/" + http.getResponseMessage() + "] on " + uri);
}
byte[] buf = new byte[8192];
try (InputStream in = http.getInputStream(); OutputStream out = Files.newOutputStream(destination,StandardOpenOption.CREATE_NEW,StandardOpenOption.WRITE))
{
while (true)
{
int len = in.read(buf);
if (len > 0)
{
out.write(buf,0,len);
}
if (len < 0)
{
break;
}
}
}
}
/**
* Test if any of the Paths exist (as files)
*
* @param paths
* the list of paths to check
* @return true if the path exist (as a file), false if it doesn't exist
* @throws IOException
* if the path points to a non-file, or is not readable.
*/
protected boolean isFilePresent(Path... paths) throws IOException
{
for (Path file : paths)
{
if (Files.exists(file))
{
if (Files.isDirectory(file))
{
throw new IOException("Directory in the way: " + file.toAbsolutePath());
}
if (!Files.isReadable(file))
{
throw new IOException("File not readable: " + file.toAbsolutePath());
}
return true;
}
}
return false;
}
public boolean copyDirectory(Path source, Path destination) throws IOException
{
boolean modified=false;
try(DirectoryStream<Path> stream = Files.newDirectoryStream(source))
{
for (Path from : stream)
{
Path to = destination.resolve(from.getFileName());
if (Files.isDirectory(from))
{
if (FS.ensureDirectoryExists(to))
{
StartLog.log("MKDIR",_basehome.toShortForm(to));
modified = true;
}
if (copyDirectory(from,to))
modified = true;
}
else if (!Files.exists(to))
{
StartLog.log("COPY ","%s to %s",_basehome.toShortForm(from),_basehome.toShortForm(to));
Files.copy(from,to);
modified = true;
}
}
}
return modified;
}
}