/*
* Copyright 2007-2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.gradle.wrapper;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
/**
* @author Hans Dockter
*/
class Download implements IDownload {
private static final int PROGRESS_CHUNK = 20000;
private static final int BUFFER_SIZE = 10000;
public void download(String address, File destination) throws Exception {
if (destination.exists()) {
return;
}
destination.getParentFile().mkdirs();
downloadInternal(address, destination);
}
private void downloadInternal(String address, File destination) throws Exception {
OutputStream out = null;
URLConnection conn;
InputStream in = null;
try {
URL url = new URL(address);
out = new BufferedOutputStream(
new FileOutputStream(destination));
conn = url.openConnection();
in = conn.getInputStream();
byte[] buffer = new byte[BUFFER_SIZE];
int numRead;
long progressCounter = 0;
while ((numRead = in.read(buffer)) != -1) {
progressCounter += numRead;
if (progressCounter / PROGRESS_CHUNK > 0) {
System.out.print(".");
progressCounter = progressCounter - PROGRESS_CHUNK;
}
out.write(buffer, 0, numRead);
}
} finally {
System.out.println("");
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
}
}
}