org.apache.archiva.web.startup.Banner Maven / Gradle / Ivy
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package org.apache.archiva.web.startup;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import org.apache.commons.lang.StringUtils;
import org.slf4j.LoggerFactory;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Banner
*
*
*/
public class Banner
{
private static final String eol = System.getProperty("line.separator");
public static String encode( String raw )
{
// Canonicalize line ends to make them easier to process
raw = raw.replace("\r\n", "\n").replace("\r", "\n");
StringBuilder encoded = new StringBuilder();
int rawlen = raw.length();
for ( int i = 0; i < rawlen; i++ )
{
char c = raw.charAt( i );
if ( c == '\\' )
{
encoded.append( "$." );
}
else if ( c == '$' )
{
encoded.append( "$$" );
}
else if ( c == '\n' )
{
encoded.append( "$n" );
}
else if ( Character.isDigit( c ) )
{
encoded.append( c );
}
else if ( Character.isLetter( c ) )
{
encoded.append( rot13( c ) );
}
else if ( i < raw.length() - 1 )
{
char nc;
boolean done = false;
int count = 0;
for ( int n = i; !done; n++ )
{
if ( n >= rawlen )
{
break;
}
nc = raw.charAt( n );
if ( nc != c )
{
done = true;
}
else
{
count++;
}
}
if ( count < 3 )
{
encoded.append( c );
}
else
{
encoded.append( "$" ).append( String.valueOf( count ) ).append( c );
i += count - 1;
}
}
else
{
encoded.append( c );
}
}
return encoded.toString();
}
public static String decode( String encoded )
{
StringBuilder decoded = new StringBuilder();
int enlen = encoded.length();
for ( int i = 0; i < enlen; i++ )
{
char c = encoded.charAt( i );
if ( c == '$' )
{
char nc = encoded.charAt( i + 1 );
if ( nc == '$' )
{
decoded.append( '$' );
i++;
}
else if ( nc == '.' )
{
decoded.append( '\\' );
i++;
}
else if ( nc == 'n' )
{
decoded.append( eol );
i++;
}
else if ( Character.isDigit( nc ) )
{
int count = 0;
int nn = i + 1;
while ( Character.isDigit( nc ) )
{
count = ( count * 10 );
count += ( nc - '0' );
nc = encoded.charAt( ++nn );
}
for ( int d = 0; d < count; d++ )
{
decoded.append( nc );
}
i = nn;
}
}
else if ( Character.isLetter( c ) )
{
decoded.append( rot13( c ) );
}
else
{
decoded.append( c );
}
}
return decoded.toString();
}
private static char rot13( char c )
{
if ( ( c >= 'a' ) && ( c <= 'z' ) )
{
char dc = c += 13;
if ( dc > 'z' )
{
dc -= 26;
}
return dc;
}
else if ( ( c >= 'A' ) && ( c <= 'Z' ) )
{
char dc = c += 13;
if ( dc > 'Z' )
{
dc -= 26;
}
return dc;
}
else
{
return c;
}
}
public static String injectVersion( String text, String version )
{
Pattern pat = Pattern.compile( "#{2,}" );
Matcher mat = pat.matcher( text );
StringBuilder ret = new StringBuilder();
int off = 0;
while ( mat.find( off ) )
{
ret.append( text.substring( off, mat.start() ) );
String repl = mat.group();
ret.append( StringUtils.center( version, repl.length() ) );
off = mat.end();
}
ret.append( text.substring( off ) );
return ret.toString();
}
public static String getBanner( String version )
{
String encodedBanner = "$26 $34_$n$15 /$._$7 /$34 $.$n$14 /`/@),$4 | Ba" +
" orunys bs nyy bs gur nycnpnf |$n$14 | (~' __| gbvyvat njnl ba " +
"gur Ncnpur Nepuvin |$n$6 _,--.$3_/ |$4 $.$5 cebwrpg grnz, V jbhyq y" +
"vxr gb$3 |$n$4 ,' ,$5 ($3 |$5 $.$5 jrypbzr lbh gb Nepuvin$6 |$" +
"n$4 | ($6 $. /$6 | $32# |$n$5 $. )$._/ ,_/$7 |$36 |$n$5 / /$3 " +
"( |/$9 | uggc://nepuvin.ncnpur.bet/ |$n$4 ( |$4 ( |$10 | hf" +
"[email protected]$7 |$n$5 $.|$5 $.|$11 $.$34_/$n$n";
return injectVersion( decode( encodedBanner ), version );
}
public static void display( String version )
{
String banner = getBanner( version );
LoggerFactory.getLogger( Banner.class ).info( "{} {}{}" , StringUtils.repeat( "_", 25 ), eol, banner );
}
}