package org.chartsy.chatsy.chat.util;
import org.chartsy.chatsy.chat.util.log.Log;
public class Base64
{
public final static int NO_OPTIONS = 0;
public final static int ENCODE = 1;
public final static int DECODE = 0;
public final static int GZIP = 2;
public final static int DONT_BREAK_LINES = 8;
private final static int MAX_LINE_LENGTH = 76;
private final static byte EQUALS_SIGN = (byte)'=';
private final static byte NEW_LINE = (byte)'\n';
private final static String PREFERRED_ENCODING = "UTF-8";
private final static byte[] ALPHABET;
private final static byte[] _NATIVE_ALPHABET =
{
(byte)'A', (byte)'B', (byte)'C', (byte)'D', (byte)'E', (byte)'F', (byte)'G',
(byte)'H', (byte)'I', (byte)'J', (byte)'K', (byte)'L', (byte)'M', (byte)'N',
(byte)'O', (byte)'P', (byte)'Q', (byte)'R', (byte)'S', (byte)'T', (byte)'U',
(byte)'V', (byte)'W', (byte)'X', (byte)'Y', (byte)'Z',
(byte)'a', (byte)'b', (byte)'c', (byte)'d', (byte)'e', (byte)'f', (byte)'g',
(byte)'h', (byte)'i', (byte)'j', (byte)'k', (byte)'l', (byte)'m', (byte)'n',
(byte)'o', (byte)'p', (byte)'q', (byte)'r', (byte)'s', (byte)'t', (byte)'u',
(byte)'v', (byte)'w', (byte)'x', (byte)'y', (byte)'z',
(byte)'0', (byte)'1', (byte)'2', (byte)'3', (byte)'4', (byte)'5',
(byte)'6', (byte)'7', (byte)'8', (byte)'9', (byte)'+', (byte)'/'
};
static
{
byte[] __bytes;
try
{
__bytes = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".getBytes(PREFERRED_ENCODING);
} // end try
catch (java.io.UnsupportedEncodingException use)
{
__bytes = _NATIVE_ALPHABET;
}
ALPHABET = __bytes;
}
private final static byte[] DECODABET =
{
-9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 0 - 8
-5, -5, // Whitespace: Tab and Linefeed
-9, -9, // Decimal 11 - 12
-5, // Whitespace: Carriage Return
-9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 14 - 26
-9, -9, -9, -9, -9, // Decimal 27 - 31
-5, // Whitespace: Space
-9, -9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 33 - 42
62, // Plus sign at decimal 43
-9, -9, -9, // Decimal 44 - 46
63, // Slash at decimal 47
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, // Numbers zero through nine
-9, -9, -9, // Decimal 58 - 60
-1, // Equals sign at decimal 61
-9, -9, -9, // Decimal 62 - 64
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, // Letters 'A' through 'N'
14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, // Letters 'O' through 'Z'
-9, -9, -9, -9, -9, -9, // Decimal 91 - 96
26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, // Letters 'a' through 'm'
39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, // Letters 'n' through 'z'
-9, -9, -9, -9
};
private final static byte WHITE_SPACE_ENC = -5;
private final static byte EQUALS_SIGN_ENC = -1;
private Base64()
{
}
private static byte[] encode3to4(byte[] b4, byte[] threeBytes, int numSigBytes)
{
encode3to4(threeBytes, 0, numSigBytes, b4, 0);
return b4;
}
private static byte[] encode3to4(byte[] source, int srcOffset, int numSigBytes,
byte[] destination, int destOffset)
{
int inBuff = (numSigBytes > 0 ? ((source[srcOffset] << 24) >>> 8) : 0)
| (numSigBytes > 1 ? ((source[srcOffset + 1] << 24) >>> 16) : 0)
| (numSigBytes > 2 ? ((source[srcOffset + 2] << 24) >>> 24) : 0);
switch (numSigBytes)
{
case 3:
destination[destOffset] = ALPHABET[(inBuff >>> 18)];
destination[destOffset + 1] = ALPHABET[(inBuff >>> 12) & 0x3f];
destination[destOffset + 2] = ALPHABET[(inBuff >>> 6) & 0x3f];
destination[destOffset + 3] = ALPHABET[(inBuff) & 0x3f];
return destination;
case 2:
destination[destOffset] = ALPHABET[(inBuff >>> 18)];
destination[destOffset + 1] = ALPHABET[(inBuff >>> 12) & 0x3f];
destination[destOffset + 2] = ALPHABET[(inBuff >>> 6) & 0x3f];
destination[destOffset + 3] = EQUALS_SIGN;
return destination;
case 1:
destination[destOffset] = ALPHABET[(inBuff >>> 18)];
destination[destOffset + 1] = ALPHABET[(inBuff >>> 12) & 0x3f];
destination[destOffset + 2] = EQUALS_SIGN;
destination[destOffset + 3] = EQUALS_SIGN;
return destination;
default:
return destination;
}
}
public static String encodeObject(java.io.Serializable serializableObject)
{
return encodeObject(serializableObject, NO_OPTIONS);
}
public static String encodeObject(java.io.Serializable serializableObject, int options)
{
java.io.ByteArrayOutputStream baos = null;
java.io.OutputStream b64os = null;
java.io.ObjectOutputStream oos = null;
java.util.zip.GZIPOutputStream gzos = null;
int gzip = (options & GZIP);
int dontBreakLines = (options & DONT_BREAK_LINES);
try
{
baos = new java.io.ByteArrayOutputStream();
b64os = new Base64.OutputStream(baos, ENCODE | dontBreakLines);
if (gzip == GZIP)
{
gzos = new java.util.zip.GZIPOutputStream(b64os);
oos = new java.io.ObjectOutputStream(gzos);
}
else
oos = new java.io.ObjectOutputStream(b64os);
oos.writeObject(serializableObject);
}
catch (java.io.IOException e)
{
Log.error(e);
return null;
}
finally
{
try
{
oos.close();
}
catch (Exception e)
{
}
try
{
gzos.close();
}
catch (Exception e)
{
}
try
{
b64os.close();
}
catch (Exception e)
{
}
try
{
baos.close();
}
catch (Exception e)
{
}
}
try
{
return new String(baos.toByteArray(), PREFERRED_ENCODING);
}
catch (java.io.UnsupportedEncodingException uue)
{
return new String(baos.toByteArray());
}
}
public static String encodeBytes(byte[] source)
{
return encodeBytes(source, 0, source.length, NO_OPTIONS);
}
public static String encodeBytes(byte[] source, int options)
{
return encodeBytes(source, 0, source.length, options);
}
public static String encodeBytes(byte[] source, int off, int len)
{
return encodeBytes(source, off, len, NO_OPTIONS);
}
public static String encodeBytes(byte[] source, int off, int len, int options)
{
int dontBreakLines = (options & DONT_BREAK_LINES);
int gzip = (options & GZIP);
if (gzip == GZIP)
{
java.io.ByteArrayOutputStream baos = null;
java.util.zip.GZIPOutputStream gzos = null;
Base64.OutputStream b64os = null;
try
{
baos = new java.io.ByteArrayOutputStream();
b64os = new Base64.OutputStream(baos, ENCODE | dontBreakLines);
gzos = new java.util.zip.GZIPOutputStream(b64os);
gzos.write(source, off, len);
gzos.close();
}
catch (java.io.IOException e)
{
Log.error(e);
return null;
}
finally
{
try
{
gzos.close();
}
catch (Exception e)
{
}
try
{
b64os.close();
}
catch (Exception e)
{
}
try
{
baos.close();
}
catch (Exception e)
{
}
}
try
{
return new String(baos.toByteArray(), PREFERRED_ENCODING);
}
catch (java.io.UnsupportedEncodingException uue)
{
return new String(baos.toByteArray());
}
}
else
{
boolean breakLines = dontBreakLines == 0;
int len43 = len * 4 / 3;
byte[] outBuff = new byte[(len43)
+ ((len % 3) > 0 ? 4 : 0)
+ (breakLines ? (len43 / MAX_LINE_LENGTH) : 0)];
int d = 0;
int e = 0;
int len2 = len - 2;
int lineLength = 0;
for (; d < len2; d += 3, e += 4)
{
encode3to4(source, d + off, 3, outBuff, e);
lineLength += 4;
if (breakLines && lineLength == MAX_LINE_LENGTH)
{
outBuff[e + 4] = NEW_LINE;
e++;
lineLength = 0;
}
}
if (d < len)
{
encode3to4(source, d + off, len - d, outBuff, e);
e += 4;
}
try
{
return new String(outBuff, 0, e, PREFERRED_ENCODING);
}
catch (java.io.UnsupportedEncodingException uue)
{
return new String(outBuff, 0, e);
}
}
}
private static int decode4to3(byte[] source, int srcOffset, byte[] destination, int destOffset)
{
if (source[srcOffset + 2] == EQUALS_SIGN)
{
int outBuff = ((DECODABET[source[srcOffset]] & 0xFF) << 18)
| ((DECODABET[source[srcOffset + 1]] & 0xFF) << 12);
destination[destOffset] = (byte)(outBuff >>> 16);
return 1;
}
else if (source[srcOffset + 3] == EQUALS_SIGN)
{
int outBuff = ((DECODABET[source[srcOffset]] & 0xFF) << 18)
| ((DECODABET[source[srcOffset + 1]] & 0xFF) << 12)
| ((DECODABET[source[srcOffset + 2]] & 0xFF) << 6);
destination[destOffset] = (byte)(outBuff >>> 16);
destination[destOffset + 1] = (byte)(outBuff >>> 8);
return 2;
}
else
{
try
{
int outBuff = ((DECODABET[source[srcOffset]] & 0xFF) << 18)
| ((DECODABET[source[srcOffset + 1]] & 0xFF) << 12)
| ((DECODABET[source[srcOffset + 2]] & 0xFF) << 6)
| ((DECODABET[source[srcOffset + 3]] & 0xFF));
destination[destOffset] = (byte)(outBuff >> 16);
destination[destOffset + 1] = (byte)(outBuff >> 8);
destination[destOffset + 2] = (byte)(outBuff);
return 3;
}
catch (Exception e)
{
System.out.println("" + source[srcOffset] + ": " + (DECODABET[source[srcOffset]]));
System.out.println("" + source[srcOffset + 1] + ": " + (DECODABET[source[srcOffset + 1]]));
System.out.println("" + source[srcOffset + 2] + ": " + (DECODABET[source[srcOffset + 2]]));
System.out.println("" + source[srcOffset + 3] + ": " + (DECODABET[source[srcOffset + 3]]));
return -1;
}
}
}
public static byte[] decode(byte[] source, int off, int len)
{
int len34 = len * 3 / 4;
byte[] outBuff = new byte[len34];
int outBuffPosn = 0;
byte[] b4 = new byte[4];
int b4Posn = 0;
int i;
byte sbiCrop;
byte sbiDecode;
for (i = off; i < off + len; i++)
{
sbiCrop = (byte)(source[i] & 0x7f);
sbiDecode = DECODABET[sbiCrop];
if (sbiDecode >= WHITE_SPACE_ENC)
{
if (sbiDecode >= EQUALS_SIGN_ENC)
{
b4[b4Posn++] = sbiCrop;
if (b4Posn > 3)
{
outBuffPosn += decode4to3(b4, 0, outBuff, outBuffPosn);
b4Posn = 0;
if (sbiCrop == EQUALS_SIGN)
break;
}
}
}
else
{
System.err.println("Bad Base64 input character at " + i + ": " + source[i] + "(decimal)");
return null;
}
}
byte[] out = new byte[outBuffPosn];
System.arraycopy(outBuff, 0, out, 0, outBuffPosn);
return out;
}
public static byte[] decode(String s)
{
byte[] bytes;
try
{
bytes = s.getBytes(PREFERRED_ENCODING);
}
catch (java.io.UnsupportedEncodingException uee)
{
bytes = s.getBytes();
}
bytes = decode(bytes, 0, bytes.length);
if (bytes.length >= 2)
{
int head = ((int)bytes[0] & 0xff) | ((bytes[1] << 8) & 0xff00);
if (bytes != null
&& bytes.length >= 4
&& java.util.zip.GZIPInputStream.GZIP_MAGIC == head)
{
java.io.ByteArrayInputStream bais = null;
java.util.zip.GZIPInputStream gzis = null;
java.io.ByteArrayOutputStream baos = null;
byte[] buffer = new byte[2048];
int length;
try
{
baos = new java.io.ByteArrayOutputStream();
bais = new java.io.ByteArrayInputStream(bytes);
gzis = new java.util.zip.GZIPInputStream(bais);
while ((length = gzis.read(buffer)) >= 0)
baos.write(buffer, 0, length);
bytes = baos.toByteArray();
}
catch (java.io.IOException e)
{
}
finally
{
try
{
baos.close();
}
catch (Exception e)
{
}
try
{
gzis.close();
}
catch (Exception e)
{
}
try
{
bais.close();
}
catch (Exception e)
{
}
}
}
}
return bytes;
}
public static Object decodeToObject(String encodedObject)
{
byte[] objBytes = decode(encodedObject);
java.io.ByteArrayInputStream bais = null;
java.io.ObjectInputStream ois = null;
Object obj = null;
try
{
bais = new java.io.ByteArrayInputStream(objBytes);
ois = new java.io.ObjectInputStream(bais);
obj = ois.readObject();
}
catch (java.io.IOException e)
{
Log.error(e);
obj = null;
}
catch (java.lang.ClassNotFoundException e)
{
Log.error(e);
obj = null;
}
finally
{
try
{
if (bais != null)
bais.close();
}
catch (Exception e)
{
}
try
{
if (ois != null)
ois.close();
}
catch (Exception e)
{
}
}
return obj;
}
public static class InputStream extends java.io.FilterInputStream
{
private boolean encode;
private int position;
private byte[] buffer;
private int bufferLength;
private int numSigBytes;
private int lineLength;
private boolean breakLines;
public InputStream(java.io.InputStream in)
{
this(in, DECODE);
}
public InputStream(java.io.InputStream in, int options)
{
super(in);
this.breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
this.encode = (options & ENCODE) == ENCODE;
this.bufferLength = encode ? 4 : 3;
this.buffer = new byte[bufferLength];
this.position = -1;
this.lineLength = 0;
}
public int read() throws java.io.IOException
{
if (position < 0)
{
if (encode)
{
byte[] b3 = new byte[3];
int numBinaryBytes = 0;
for (int i = 0; i < 3; i++)
{
try
{
int b = in.read();
if (b >= 0)
{
b3[i] = (byte)b;
numBinaryBytes++;
}
}
catch (java.io.IOException e)
{
if (i == 0)
throw e;
}
}
if (numBinaryBytes > 0)
{
encode3to4(b3, 0, numBinaryBytes, buffer, 0);
position = 0;
numSigBytes = 4;
}
else
{
return -1;
}
}
else
{
byte[] b4 = new byte[4];
int i;
for (i = 0; i < 4; i++)
{
int b;
do
{
b = in.read();
}
while (b >= 0 && DECODABET[b & 0x7f] <= WHITE_SPACE_ENC);
if (b < 0)
break;
b4[i] = (byte)b;
}
if (i == 4)
{
numSigBytes = decode4to3(b4, 0, buffer, 0);
position = 0;
}
else if (i == 0)
{
return -1;
}
else
{
throw new java.io.IOException("Improperly padded Base64 input.");
}
}
}
if (position >= 0)
{
if (position >= numSigBytes)
return -1;
if (encode && breakLines && lineLength >= MAX_LINE_LENGTH)
{
lineLength = 0;
return '\n';
}
else
{
lineLength++;
int b = buffer[position++];
if (position >= bufferLength)
position = -1;
return b & 0xFF;
}
}
else
{
throw new java.io.IOException("Error in Base64 code reading stream.");
}
}
public int read(byte[] dest, int off, int len) throws java.io.IOException
{
int i;
int b;
for (i = 0; i < len; i++) {
b = read();
if (b >= 0)
dest[off + i] = (byte)b;
else if (i == 0)
return -1;
else
break;
}
return i;
}
}
public static class OutputStream extends java.io.FilterOutputStream
{
private boolean encode;
private int position;
private byte[] buffer;
private int bufferLength;
private int lineLength;
private boolean breakLines;
private byte[] b4;
private boolean suspendEncoding;
public OutputStream(java.io.OutputStream out)
{
this(out, ENCODE);
}
public OutputStream(java.io.OutputStream out, int options)
{
super(out);
this.breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
this.encode = (options & ENCODE) == ENCODE;
this.bufferLength = encode ? 3 : 4;
this.buffer = new byte[bufferLength];
this.position = 0;
this.lineLength = 0;
this.suspendEncoding = false;
this.b4 = new byte[4];
}
public void write(int theByte) throws java.io.IOException
{
if (suspendEncoding) {
super.out.write(theByte);
return;
}
if (encode)
{
buffer[position++] = (byte)theByte;
if (position >= bufferLength)
{
out.write(encode3to4(b4, buffer, bufferLength));
lineLength += 4;
if (breakLines && lineLength >= MAX_LINE_LENGTH)
{
out.write(NEW_LINE);
lineLength = 0;
}
position = 0;
}
}
else
{
if (DECODABET[theByte & 0x7f] > WHITE_SPACE_ENC)
{
buffer[position++] = (byte)theByte;
if (position >= bufferLength)
{
int len = Base64.decode4to3(buffer, 0, b4, 0);
out.write(b4, 0, len);
position = 0;
}
}
else if (DECODABET[theByte & 0x7f] != WHITE_SPACE_ENC)
{
throw new java.io.IOException("Invalid character in Base64 data.");
}
}
}
public void write(byte[] theBytes, int off, int len) throws java.io.IOException
{
if (suspendEncoding)
{
super.out.write(theBytes, off, len);
return;
}
for (int i = 0; i < len; i++)
{
write(theBytes[off + i]);
}
}
public void flushBase64() throws java.io.IOException
{
if (position > 0)
{
if (encode)
{
out.write(encode3to4(b4, buffer, position));
position = 0;
}
else
{
throw new java.io.IOException("Base64 input not properly padded.");
}
}
}
public void close() throws java.io.IOException
{
flushBase64();
super.close();
buffer = null;
out = null;
}
public void suspendEncoding() throws java.io.IOException
{
flushBase64();
this.suspendEncoding = true;
}
public void resumeEncoding()
{
this.suspendEncoding = false;
}
}
}