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package org.openslx.satserver.util;
import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import org.apache.commons.io.FileUtils;
public class Util
{
/**
* Check if the given string starts with any of the additionally passed strings.
* Ugly boilerplate.
*
* @param stringToCheck a string we want to check the starting of
* @param compareTo list of strings we compare stringToCheck to
* @return true if stringToCheck starts with any of the strings in compareTo
*/
public static boolean startsWith( String stringToCheck, String... compareTo )
{
if ( stringToCheck == null )
return false;
for ( String check : compareTo ) {
if ( stringToCheck.startsWith( check ) )
return true;
}
return false;
}
/**
* Close all given Closables. Can handle null references.
*
* @param streams one or more closables/streams
*/
public static void multiClose( Closeable... streams )
{
if ( streams == null )
return;
for ( Closeable stream : streams ) {
if ( stream != null ) {
try {
stream.close();
} catch ( IOException e ) {
// Ignore - nothing meaningful to do
}
}
}
}
public static boolean streamCopy( InputStream in, OutputStream out, long bytes )
{
byte buffer[] = new byte[ 7900 ];
while ( bytes > 0 ) {
try {
int ret = in.read( buffer, 0, (int) ( bytes > buffer.length ? buffer.length : bytes ) );
if ( ret == -1 )
return false;
bytes -= ret;
out.write( buffer, 0, ret );
} catch ( IOException e ) {
e.printStackTrace();
return false;
}
}
return true;
}
public static String readFileToString( String file ) throws IOException
{
return FileUtils.readFileToString( new File( file ), StandardCharsets.UTF_8 );
}
public static void writeStringToFile( File file, String string ) throws IOException
{
FileUtils.writeStringToFile( file, string, StandardCharsets.UTF_8 );
}
private static final String[] DEFAULT_ALLOWED_DIRS =
{ "/tmp/", "/opt/openslx/configs/" };
public static boolean isAllowedDir( String dir )
{
return startsWith( dir, DEFAULT_ALLOWED_DIRS );
}
}
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