org.apache.maven.wrapper.DefaultDownloader Maven / Gradle / Ivy
/*
* 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.apache.maven.wrapper;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
/**
* @author Hans Dockter
*/
public class DefaultDownloader implements Downloader {
private static final int PROGRESS_CHUNK = 500000;
private static final int BUFFER_SIZE = 10000;
private final String applicationName;
private final String applicationVersion;
public DefaultDownloader(String applicationName, String applicationVersion) {
this.applicationName = applicationName;
this.applicationVersion = applicationVersion;
configureProxyAuthentication();
}
private void configureProxyAuthentication() {
if (System.getProperty("http.proxyUser") != null) {
Authenticator.setDefault(new SystemPropertiesProxyAuthenticator());
}
}
public void download(URI address, File destination) throws Exception {
if (destination.exists()) {
return;
}
destination.getParentFile().mkdirs();
downloadInternal(address, destination);
}
private void downloadInternal(URI address, File destination) throws Exception {
OutputStream out = null;
URLConnection conn;
InputStream in = null;
try {
URL url = address.toURL();
out = new BufferedOutputStream(new FileOutputStream(destination));
conn = url.openConnection();
final String userAgentValue = calculateUserAgent();
conn.setRequestProperty("User-Agent", userAgentValue);
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) {
Logger.info(".");
progressCounter = progressCounter - PROGRESS_CHUNK;
}
out.write(buffer, 0, numRead);
}
} finally {
Logger.info("");
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
}
}
private String calculateUserAgent() {
String appVersion = applicationVersion;
String javaVendor = System.getProperty("java.vendor");
String javaVersion = System.getProperty("java.version");
String javaVendorVersion = System.getProperty("java.vm.version");
String osName = System.getProperty("os.name");
String osVersion = System.getProperty("os.version");
String osArch = System.getProperty("os.arch");
return String.format("%s/%s (%s;%s;%s) (%s;%s;%s)", applicationName, appVersion, osName, osVersion, osArch, javaVendor, javaVersion, javaVendorVersion);
}
private static class SystemPropertiesProxyAuthenticator extends Authenticator {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(System.getProperty("http.proxyUser"), System.getProperty("http.proxyPassword", "").toCharArray());
}
}
}