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//
// ========================================================================
// Copyright (c) 1995-2014 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.fileinits;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import org.eclipse.jetty.start.BaseHome;
import org.eclipse.jetty.start.FS;
import org.eclipse.jetty.start.FileInitializer;
import org.eclipse.jetty.start.StartLog;
public class UriFileInitializer implements FileInitializer
{
private final static String[] SUPPORTED_SCHEMES = { "http", "https" };
protected final BaseHome baseHome;
public UriFileInitializer(BaseHome baseHome)
{
this.baseHome = baseHome;
}
@Override
public boolean init(URI uri, Path file) throws IOException
{
if (!isSupportedScheme(uri))
{
// Not a supported scheme.
return false;
}
if(isFilePresent(file))
{
// All done
return true;
}
download(uri,file);
return true;
}
protected void download(URI uri, Path file) throws IOException
{
StartLog.log("DOWNLOAD","%s to %s",uri,baseHome.toShortForm(file));
FS.ensureDirectoryExists(file.getParent());
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(file,StandardOpenOption.CREATE_NEW,StandardOpenOption.WRITE))
{
while (true)
{
int len = in.read(buf);
if (len > 0)
{
out.write(buf,0,len);
}
if (len < 0)
{
break;
}
}
}
}
protected boolean isFilePresent(Path file) throws IOException
{
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;
}
private boolean isSupportedScheme(URI uri)
{
String scheme = uri.getScheme();
if (scheme == null)
{
return false;
}
for (String supported : SUPPORTED_SCHEMES)
{
if (supported.equalsIgnoreCase(scheme))
{
return true;
}
}
return false;
}
}
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