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package org.openslx.taskmanager.tasks;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.openslx.satserver.util.Exec;
import org.openslx.satserver.util.ProxyHandler;
import org.openslx.satserver.util.Util;
import org.openslx.taskmanager.api.AbstractTask;
import com.google.gson.annotations.Expose;
public class DownloadFile extends AbstractTask
{
@Expose
private String url = null;
@Expose
private String destination = null;
@Expose
private String gpg = null;
private Output status = new Output();
private static final String[] ALLOWED_DIRS =
{ "/srv/openslx/www/boot/", "/tmp/" };
@Override
protected boolean initTask()
{
this.setStatusObject( status );
if ( this.url == null ) {
status.error = "No URL given.";
return false;
}
this.destination = FilenameUtils.normalize( this.destination );
if ( this.destination == null || !Util.startsWith( this.destination, ALLOWED_DIRS ) || this.destination.endsWith( "/" ) ) {
status.error = "File not in allowed directory";
return false;
}
return true;
}
@Override
protected boolean execute()
{
URLConnection connection = null;
BufferedInputStream in = null;
FileOutputStream fout = null;
// Handle proxy settings before opening connection for downloading.
ProxyHandler.configProxy();
try {
File tmpFile = File.createTempFile( "bwlp-", ".tmp", null );
connection = new URL( this.url ).openConnection();
in = new BufferedInputStream( connection.getInputStream() );
fout = new FileOutputStream( tmpFile );
status.size = connection.getContentLengthLong();
if ( status.size <= 0 ) // If size is unknown, fake progress...
status.progress = 10;
final byte data[] = new byte[ 90000 ];
int count;
while ( ( count = in.read( data, 0, data.length ) ) != -1 ) {
fout.write( data, 0, count );
status.complete += count;
if ( status.size > 0 )
status.progress = (int) ( 100l * status.complete / status.size );
else if ( status.progress < 99 && System.currentTimeMillis() % 20 == 0 )
status.progress++;
}
fout.close();
in.close();
// If we have a gpg sig, validate
if ( this.gpg != null && !this.gpg.isEmpty() ) {
File gpgTempFile = null;
try {
gpgTempFile = File.createTempFile( "bwlp-", ".gpg", null );
Util.writeStringToFile( gpgTempFile, this.gpg );
} catch ( Exception e ) {
status.error = "Could not create temporary file for gpg signature";
return false;
}
if ( 0 != Exec.sync( 10, "gpg", "--verify", gpgTempFile.getAbsolutePath(), tmpFile.getAbsolutePath() ) ) {
status.error = "GPG signature of downloaded file not valid!\n\n" + this.gpg;
return false;
}
gpgTempFile.delete();
}
// Move file to destination
File dest = new File( this.destination );
FileUtils.forceMkdir( new File( dest.getParent() ) );
if ( dest.exists() )
dest.delete();
if ( !tmpFile.renameTo( dest ) ) {
status.error = "Could not move downloaded file to destination directory!";
return false;
}
return true;
} catch ( IOException e ) {
status.error = "Download error: " + e.toString();
return false;
} finally {
Util.multiClose( in, fout );
}
}
/**
* Output - contains additional status data of this task
*/
@SuppressWarnings( "unused" )
private static class Output
{
protected String error = null;
protected long size = -1;
protected long complete = 0;
protected int progress = 0;
}
}
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