com.sun.faces.util.HtmlUtils Maven / Gradle / Ivy
/*
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*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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package com.sun.faces.util;
import com.sun.faces.config.WebConfiguration;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.nio.charset.Charset;
import java.util.BitSet;
import java.util.Set;
import java.util.HashSet;
import java.util.Arrays;
/**
* Utility class for HTML.
* Kudos to Adam Winer (Oracle) for much of this code.
*/
public class HtmlUtils {
private final static Set UTF_CHARSET = new HashSet(Arrays.asList("UTF-8", "UTF-16",
"UTF-16BE", "UTF-16LE", "UTF-32", "UTF-32BE", "UTF-32LE", "x-UTF-16LE-BOM", "X-UTF-32BE-BOM",
"X-UTF-32LE-BOM", ""));
//-------------------------------------------------
// The following methods include the handling of
// escape characters....
//-------------------------------------------------
static public void writeText(Writer out,
boolean escapeUnicode,
boolean escapeIsocode, char[] buffer,
char[] text) throws IOException {
writeText(out, escapeUnicode, escapeIsocode, buffer, text, 0, text.length);
}
/**
* Write char array text.
*/
static public void writeText(Writer out,
boolean escapeUnicode,
boolean escapeIsocode, char[] buff,
char[] text,
int start,
int length) throws IOException {
int buffLength = buff.length;
int buffIndex = 0;
int end = start + length;
for (int i = start; i < end; i++) {
buffIndex = writeTextChar(out, escapeUnicode, escapeIsocode, text[i], buffIndex, buff, buffLength);
}
flushBuffer(out, buff, buffIndex);
}
/**
* Write String text.
*/
static public void writeText(Writer out,
boolean escapeUnicode,
boolean escapeIsocode, char[] buff,
String text,
char[] textBuff) throws IOException {
int length = text.length();
if (length >= 16) {
text.getChars(0, length, textBuff, 0);
writeText(out, escapeUnicode, escapeIsocode, buff, textBuff, 0, length);
} else {
int buffLength = buff.length;
int buffIndex = 0;
for (int i = 0; i < length; i++) {
char ch = text.charAt(i);
buffIndex = writeTextChar(out, escapeUnicode, escapeIsocode, ch, buffIndex, buff, buffLength);
}
flushBuffer(out, buff, buffIndex);
}
}
private static int writeTextChar(Writer out,
boolean escapeUnicode,
boolean escapeIsocode,
char ch,
int buffIndex,
char[] buff,
int buffLength) throws IOException {
int nextIndex;
if (ch <= 0x1f) {
if (!isPrintableControlChar(ch)) {
return buffIndex;
}
}
if (ch < 0xA0) {
// If "?" or over, no escaping is needed (this covers
// most of the Latin alphabet)
if (ch >= 0x3f) {
nextIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
} else if (ch >= 0x27) { // If above "'"...
// If between "'" and ";", no escaping is needed
if (ch < 0x3c) {
nextIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
} else if (ch == '<') {
nextIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
LT_CHARS);
} else if (ch == '>') {
nextIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
GT_CHARS);
} else {
nextIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
} else {
if (ch == '&') {
nextIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
AMP_CHARS);
} else if (ch == '"') {
nextIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
QUOT_CHARS);
} else {
nextIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
}
} else if (ch <= 0xff) {
if (escapeIsocode) {
// ISO-8859-1 entities: encode as needed
nextIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
sISO8859_1_Entities[ch - 0xA0]);
}
else {
nextIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
} else {
if(escapeUnicode) {
// UNICODE entities: encode as needed
nextIndex =
_writeDecRef(out, buff, buffIndex, buffLength, ch);
} else {
nextIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
}
return nextIndex;
}
/**
* Write a string attribute. Note that this code
* is duplicated below for character arrays - change both
* places if you make any changes!!!
*/
static public void writeAttribute(Writer out,
boolean escapeUnicode,
boolean escapeIsocode,
char[] buff,
String text,
char[] textBuff,
boolean isScriptInAttributeValueEnabled) throws IOException {
int length = text.length();
if (length >= 16) {
if (length > textBuff.length) {
// resize our buffer
textBuff = new char[length * 2];
}
text.getChars(0, length, textBuff, 0);
writeAttribute(out, escapeUnicode, escapeIsocode, buff, textBuff, 0, length,
isScriptInAttributeValueEnabled);
} else {
int buffLength = buff.length;
int buffIndex = 0;
for (int i = 0; i < length; i++) {
char ch = text.charAt(i);
if (ch <= 0x1f) {
if (!isPrintableControlChar(ch)) {
continue;
}
}
// Tilde or less...
if (ch < 0xA0) {
// If "?" or over, no escaping is needed (this covers
// most of the Latin alphabet)
if (ch >= 0x3f) {
if (ch == 's') {
// If putting scripts in attribute values
// has been disabled (the defualt), look for
// script: in the attribute value.
// ensure the attribute value is long enough
// to accomodate "script:"
if (!isScriptInAttributeValueEnabled &&
((i + 6) < text.length())) {
if ('c' == text.charAt(i + 1) &&
'r' == text.charAt(i + 2) &&
'i' == text.charAt(i + 3) &&
'p' == text.charAt(i + 4) &&
't' == text.charAt(i + 5) &&
':' == text.charAt(i + 6)) {
return;
}
}
}
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
} else if (ch >= 0x27) { // If above "'"...
// If between "'" and ";", no escaping is needed
if (ch < 0x3c) {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
} else if (ch == '<') {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
LT_CHARS);
} else if (ch == '>') {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
GT_CHARS);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
} else {
if (ch == '&') {
// HTML 4.0, section B.7.1: ampersands followed by
// an open brace don't get escaped
if ((i + 1 < length) && (text.charAt(i + 1)
== '{')) {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
ch);
} else {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
AMP_CHARS);
}
} else if (ch == '"') {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
QUOT_CHARS);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
}
} else if (ch <= 0xff) {
if (escapeIsocode) {
// ISO-8859-1 entities: encode as needed
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
sISO8859_1_Entities[ch - 0xA0]);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
} else {
if(escapeUnicode) {
// UNICODE entities: encode as needed
buffIndex =
_writeDecRef(out, buff, buffIndex, buffLength, ch);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
}
}
flushBuffer(out, buff, buffIndex);
}
}
static public void writeAttribute(Writer out,
boolean escapeUnicode,
boolean escapeIsocode,
char[] buffer,
char[] text) throws IOException {
writeAttribute(out, escapeUnicode, escapeIsocode, buffer, text, 0, text.length,
WebConfiguration.BooleanWebContextInitParameter.EnableScriptInAttributeValue.getDefaultValue());
}
/**
* Write a character array attribute. Note that this code
* is duplicated above for string - change both places if you make
* any changes!!!
*/
static public void writeAttribute(Writer out,
boolean escapeUnicode,
boolean escapeIsocode,
char[] buff,
char[] text,
int start,
int length,
boolean isScriptInAttributeValueEnabled) throws IOException {
int buffLength = buff.length;
int buffIndex = 0;
int end = start + length;
for (int i = start; i < end; i++) {
char ch = text[i];
// "Application Program Command" or less...
if (ch <= 0x1f) {
if (!isPrintableControlChar(ch)) {
continue;
}
}
if (ch < 0xA0) {
// If "?" or over, no escaping is needed (this covers
// most of the Latin alphabet)
if (ch >= 0x3f) {
if (ch == 's') {
// If putting scripts in attribute values
// has been disabled (the defualt), look for
// script: in the attribute value.
// ensure the attribute value is long enough
// to accomodate "script:"
if (!isScriptInAttributeValueEnabled &&
((i + 6) < text.length)) {
if ('c' == text[i + 1] &&
'r' == text[i + 2] &&
'i' == text[i + 3] &&
'p' == text[i + 4] &&
't' == text[i + 5] &&
':' == text[i + 6]) {
return;
}
}
}
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
} else if (ch >= 0x27) { // If above "'"...
if (ch < 0x3c) {
// If between "'" and ";", no escaping is needed
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
} else if (ch == '<') {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
LT_CHARS);
} else if (ch == '>') {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
GT_CHARS);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
} else {
if (ch == '&') {
// HTML 4.0, section B.7.1: ampersands followed by
// an open brace don't get escaped
if ((i + 1 < end) && (text[i + 1] == '{')) {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
ch);
} else {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
AMP_CHARS);
}
} else if (ch == '"') {
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
QUOT_CHARS);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
}
} else if (ch <= 0xff) {
if (escapeIsocode) {
// ISO-8859-1 entities: encode as needed
buffIndex = addToBuffer(out,
buff,
buffIndex,
buffLength,
sISO8859_1_Entities[ch - 0xA0]);
}
else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
} else {
if(escapeUnicode) {
// UNICODE entities: encode as needed
buffIndex = _writeDecRef(out, buff, buffIndex, buffLength, ch);
} else {
buffIndex = addToBuffer(out, buff, buffIndex,
buffLength, ch);
}
}
}
flushBuffer(out, buff, buffIndex);
}
static private boolean isPrintableControlChar(int ch) {
return (ch == 0x09 || ch == 0x0A || ch == 0x0C || ch == 0x0D);
}
/**
* Writes a character as a decimal escape. Hex escapes are smaller than
* the decimal version, but Netscape didn't support hex escapes until
* 4.7.4.
*/
static private int _writeDecRef(Writer out,
char[] buffer,
int bufferIndex,
int bufferLength,
char ch) throws IOException {
if (ch == '\u20ac') {
bufferIndex = addToBuffer(out,
buffer,
bufferIndex,
bufferLength,
EURO_CHARS);
return bufferIndex;
}
bufferIndex = addToBuffer(out,
buffer,
bufferIndex,
bufferLength,
DEC_REF_START);
// Formerly used String.valueOf(). This version tests out
// about 40% faster in a microbenchmark (and on systems where GC is
// going gonzo, it should be even better)
int i = (int) ch;
if (i > 10000) {
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 10000))));
i = i % 10000;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 1000))));
i = i % 1000;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 100))));
i = i % 100;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 10))));
i = i % 10;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + i)));
} else if (i > 1000) {
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 1000))));
i = i % 1000;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 100))));
i = i % 100;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 10))));
i = i % 10;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + i)));
} else {
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 100))));
i = i % 100;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + (i / 10))));
i = i % 10;
bufferIndex = addToBuffer(out, buffer, bufferIndex, bufferLength, ((char) ('0' + i)));
}
return addToBuffer(out, buffer, bufferIndex, bufferLength, ';');
}
//
// Buffering scheme: we use a tremendously simple buffering
// scheme that greatly reduces the number of calls into the
// Writer/PrintWriter. In practice this has produced significant
// measured performance gains (at least in JDK 1.3.1).
//
/**
* Add a character to the buffer, flushing the buffer if the buffer is
* full, and returning the new buffer index
*/
private static int addToBuffer(Writer out,
char[] buffer,
int bufferIndex,
int bufferLength,
char ch) throws IOException {
if (bufferIndex >= bufferLength) {
out.write(buffer, 0, bufferIndex);
bufferIndex = 0;
}
buffer[bufferIndex] = ch;
return bufferIndex + 1;
}
/**
* Add an array of characters to the buffer, flushing the buffer
* if the buffer is full, and returning the new buffer index.
*/
private static int addToBuffer(Writer out,
char[] buffer,
int bufferIndex,
int bufferLength,
char[] toAdd) throws IOException {
if (bufferIndex >= bufferLength
|| (toAdd.length + bufferIndex >= bufferLength)) {
out.write(buffer, 0, bufferIndex);
bufferIndex = 0;
}
System.arraycopy(toAdd, 0, buffer, bufferIndex, toAdd.length);
return bufferIndex + toAdd.length;
}
/**
* Flush the contents of the buffer to the output stream
* and return the reset buffer index
*/
private static int flushBuffer(Writer out,
char[] buffer,
int bufferIndex) throws IOException {
if (bufferIndex > 0)
out.write(buffer, 0, bufferIndex);
return 0;
}
private HtmlUtils() {
}
/**
* Writes a string into URL-encoded format out to a Writer.
*
* All characters before the start of the query string will be encoded
* using ISO-8859-1.
* PENDING: Ideally, we'd encode characters before the query string
* using UTF-8, which is what the HTML spec recommends. Unfortunately,
* the Apache server doesn't support this until 2.0.
*
* Characters after the start of the query string will be encoded
* using a client-defined encoding. You'll need to use the encoding
* that the server will expect. (HTML forms will generate query
* strings using the character encoding that the HTML itself was
* generated in.)
*
* All characters will be encoded as needed for URLs, with the exception
* of the percent symbol ("%"). Because this is the character
* itself used for escaping, attempting to escape this character
* would cause this code to double-escape some strings. It also may
* be necessary to pre-escape some characters. In particular, a
* question mark ("?") is considered the start of the query string.
*
*
*
* NOTE: This is method is duplicated below. The difference being
* the acceptance of a char[] for the text to write. Any changes made
* here, should be made below.
*
*
* @param out a Writer for the output
* @param text the unencoded (or partially encoded) String
* @param queryEncoding the character set encoding for after the first
* question mark
*/
static public void writeURL(Writer out,
String text,
char[] textBuff,
String queryEncoding)
throws IOException, UnsupportedEncodingException {
int length = text.length();
if (length >= 16) {
text.getChars(0, length, textBuff, 0);
writeURL(out, textBuff, 0, length, queryEncoding);
} else {
for (int i = 0; i < length; i++) {
char ch = text.charAt(i);
if ((ch < 33) || (ch > 126)) {
if (ch == ' ') {
out.write('+');
} else {
// ISO-8859-1. Blindly assume the character will be < 255.
// Not much we can do if it isn't.
writeURIDoubleHex(out, ch);
}
}
// DO NOT encode '%'. If you do, then for starters,
// we'll double-encode anything that's pre-encoded.
// And, what's worse, there becomes no way to use
// characters that must be encoded if you
// don't want them to be interpreted, like '?' or '&'.
// else if('%' == ch)
// {
// writeURIDoubleHex(out, ch);
// }
else if (ch == '"') {
out.write("%22");
}
// Everything in the query parameters will be decoded
// as if it were in the request's character set. So use
// the real encoding for those!
else if (ch == '?') {
out.write('?');
encodeURIString(out,
text,
queryEncoding,
i + 1);
return;
} else {
out.write(ch);
}
}
}
}
/**
* Writes a string into URL-encoded format out to a Writer.
*
* All characters before the start of the query string will be encoded
* using ISO-8859-1.
* PENDING: Ideally, we'd encode characters before the query string
* using UTF-8, which is what the HTML spec recommends. Unfortunately,
* the Apache server doesn't support this until 2.0.
*
* Characters after the start of the query string will be encoded
* using a client-defined encoding. You'll need to use the encoding
* that the server will expect. (HTML forms will generate query
* strings using the character encoding that the HTML itself was
* generated in.)
*
* All characters will be encoded as needed for URLs, with the exception
* of the percent symbol ("%"). Because this is the character
* itself used for escaping, attempting to escape this character
* would cause this code to double-escape some strings. It also may
* be necessary to pre-escape some characters. In particular, a
* question mark ("?") is considered the start of the query string.
*
*
* NOTE: This is method is duplicated above. The difference being
* the acceptance of a String for the text to write. Any changes made
* here, should be made above.
*
*
* @param out a Writer for the output
* @param textBuff char[] containing the content to write
* @param queryEncoding the character set encoding for after the first
* question mark
*/
static public void writeURL(Writer out,
char[] textBuff,
int start,
int len,
String queryEncoding)
throws IOException, UnsupportedEncodingException {
int end = start + len;
for (int i = start; i < end; i++) {
char ch = textBuff[i];
if ((ch < 33) || (ch > 126)) {
writeURIDoubleHex(out, ch);
}
// DO NOT encode '%'. If you do, then for starters,
// we'll double-encode anything that's pre-encoded.
// And, what's worse, there becomes no way to use
// characters that must be encoded if you
// don't want them to be interpreted, like '?' or '&'.
// else if('%' == ch)
// {
// writeURIDoubleHex(out, ch);
// }
else if (ch == '"') {
out.write("%22");
}
// Everything in the query parameters will be decoded
// as if it were in the request's character set. So use
// the real encoding for those!
else if (ch == '?') {
out.write('?');
encodeURIString(out,
textBuff,
queryEncoding,
i + 1,
end);
return;
} else {
out.write(ch);
}
}
}
static public void writeTextForXML(Writer out, String text, char[] outbuf)
throws IOException {
char[] textBuffer = new char[128];
int len = text.toString().length();
if (textBuffer.length < len) {
textBuffer = new char[len * 2];
}
HtmlUtils.writeText(out, true, true, outbuf, text, textBuffer);
}
// Encode a String into URI-encoded form. This code will
// appear rather (ahem) similar to java.net.URLEncoder
// This is duplicated below accepting a char[] for the content
// to write. Any changes here, should be made there as well.
static private void encodeURIString(Writer out,
String text,
String encoding,
int start)
throws IOException {
MyByteArrayOutputStream buf = null;
OutputStreamWriter writer = null;
char[] charArray = null;
int length = text.length();
for (int i = start; i < length; i++) {
char ch = text.charAt(i);
if (DONT_ENCODE_SET.get(ch)) {
if (ch == '&') {
if (((i + 1) < length) && isAmpEscaped(text, i + 1)) {
out.write(ch);
continue;
}
out.write(AMP_CHARS);
} else {
out.write(ch);
}
} else {
if (buf == null) {
buf = new MyByteArrayOutputStream(MAX_BYTES_PER_CHAR);
if (encoding != null) {
writer = new OutputStreamWriter(buf, encoding);
} else {
writer = new OutputStreamWriter(buf);
}
charArray = new char[1];
}
// convert to external encoding before hex conversion
try {
// An inspection of OutputStreamWriter reveals
// that write(char) always allocates a one element
// character array. We can reuse our own.
charArray[0] = ch;
writer.write(charArray, 0, 1);
writer.flush();
} catch (IOException e) {
buf.reset();
continue;
}
byte[] ba = buf.getBuf();
for (int j = 0, size = buf.size(); j < size; j++) {
writeURIDoubleHex(out, ba[j] + 256);
}
buf.reset();
}
}
}
// Encode a String into URI-encoded form. This code will
// appear rather (ahem) similar to java.net.URLEncoder
// This is duplicated above accepting a String for the content
// to write. Any changes here, should be made there as well.
static private void encodeURIString(Writer out,
char[] textBuff,
String encoding,
int start,
int end)
throws IOException {
MyByteArrayOutputStream buf = null;
OutputStreamWriter writer = null;
char[] charArray = null;
for (int i = start; i < end; i++) {
char ch = textBuff[i];
if (DONT_ENCODE_SET.get(ch)) {
if (ch == '&') {
if (((i + 1) < end) && isAmpEscaped(textBuff, i + 1)) {
out.write(ch);
continue;
}
out.write(AMP_CHARS);
} else {
out.write(ch);
}
} else {
if (buf == null) {
buf = new MyByteArrayOutputStream(MAX_BYTES_PER_CHAR);
if (encoding != null) {
writer = new OutputStreamWriter(buf, encoding);
} else {
writer = new OutputStreamWriter(buf);
}
charArray = new char[1];
}
// convert to external encoding before hex conversion
try {
// An inspection of OutputStreamWriter reveals
// that write(char) always allocates a one element
// character array. We can reuse our own.
charArray[0] = ch;
writer.write(charArray, 0, 1);
writer.flush();
} catch (IOException e) {
buf.reset();
continue;
}
byte[] ba = buf.getBuf();
for (int j = 0, size = buf.size(); j < size; j++) {
writeURIDoubleHex(out, ba[j] + 256);
}
buf.reset();
}
}
}
// NOTE: Any changes made to this method should be made
// in the associated method that accepts a char[] instead
// of String
static private boolean isAmpEscaped(String text, int idx) {
for (int i = 1, ix = idx; i < AMP_CHARS.length; i++, ix++) {
if (text.charAt(ix) == AMP_CHARS[i]) {
continue;
}
return false;
}
return true;
}
// NOTE: Any changes made to this method should be made
// in the associated method that accepts a String instead
// of char[]
static private boolean isAmpEscaped(char[] text, int idx) {
for (int i = 1, ix = idx; i < AMP_CHARS.length; i++, ix++) {
if (text[ix] == AMP_CHARS[i]) {
continue;
}
return false;
}
return true;
}
static private void writeURIDoubleHex(Writer out,
int i) throws IOException {
out.write('%');
out.write(intToHex((i >> 4) % 0x10));
out.write(intToHex(i % 0x10));
}
static private char intToHex(int i) {
if (i < 10)
return ((char) ('0' + i));
else
return ((char) ('A' + (i - 10)));
}
static private final char[] AMP_CHARS = "&".toCharArray();
static private final char[] QUOT_CHARS = """.toCharArray();
static private final char[] GT_CHARS = ">".toCharArray();
static private final char[] LT_CHARS = "<".toCharArray();
static private final char[] EURO_CHARS = "€".toCharArray();
static private final char[] DEC_REF_START = "&#".toCharArray();
static private final int MAX_BYTES_PER_CHAR = 10;
static private final BitSet DONT_ENCODE_SET = new BitSet(256);
// See: http://www.ietf.org/rfc/rfc2396.txt
// We're not fully along for that ride either, but we do encode
// ' ' as '%20', and don't bother encoding '~' or '/'
static {
for (int i = 'a'; i <= 'z'; i++) {
DONT_ENCODE_SET.set(i);
}
for (int i = 'A'; i <= 'Z'; i++) {
DONT_ENCODE_SET.set(i);
}
for (int i = '0'; i <= '9'; i++) {
DONT_ENCODE_SET.set(i);
}
// Don't encode '%' - we don't want to double encode anything.
DONT_ENCODE_SET.set('%');
// Ditto for '+', which is an encoded space
DONT_ENCODE_SET.set('+');
DONT_ENCODE_SET.set('#');
DONT_ENCODE_SET.set('&');
DONT_ENCODE_SET.set('=');
DONT_ENCODE_SET.set('-');
DONT_ENCODE_SET.set('_');
DONT_ENCODE_SET.set('.');
DONT_ENCODE_SET.set('*');
DONT_ENCODE_SET.set('~');
DONT_ENCODE_SET.set('/');
DONT_ENCODE_SET.set('\'');
DONT_ENCODE_SET.set('!');
DONT_ENCODE_SET.set('(');
DONT_ENCODE_SET.set(')');
DONT_ENCODE_SET.set(';');
}
//
// Entities from HTML 4.0, section 24.2.1; character codes 0xA0 to 0xFF
//
static private char[][] sISO8859_1_Entities = new char[][]{
" ".toCharArray(),
"¡".toCharArray(),
"¢".toCharArray(),
"£".toCharArray(),
"¤".toCharArray(),
"¥".toCharArray(),
"¦".toCharArray(),
"§".toCharArray(),
"¨".toCharArray(),
"©".toCharArray(),
"ª".toCharArray(),
"«".toCharArray(),
"¬".toCharArray(),
"".toCharArray(),
"®".toCharArray(),
"¯".toCharArray(),
"°".toCharArray(),
"±".toCharArray(),
"²".toCharArray(),
"³".toCharArray(),
"´".toCharArray(),
"µ".toCharArray(),
"¶".toCharArray(),
"·".toCharArray(),
"¸".toCharArray(),
"¹".toCharArray(),
"º".toCharArray(),
"»".toCharArray(),
"¼".toCharArray(),
"½".toCharArray(),
"¾".toCharArray(),
"¿".toCharArray(),
"À".toCharArray(),
"Á".toCharArray(),
"Â".toCharArray(),
"Ã".toCharArray(),
"Ä".toCharArray(),
"Å".toCharArray(),
"Æ".toCharArray(),
"Ç".toCharArray(),
"È".toCharArray(),
"É".toCharArray(),
"Ê".toCharArray(),
"Ë".toCharArray(),
"Ì".toCharArray(),
"Í".toCharArray(),
"Î".toCharArray(),
"Ï".toCharArray(),
"Ð".toCharArray(),
"Ñ".toCharArray(),
"Ò".toCharArray(),
"Ó".toCharArray(),
"Ô".toCharArray(),
"Õ".toCharArray(),
"Ö".toCharArray(),
"×".toCharArray(),
"Ø".toCharArray(),
"Ù".toCharArray(),
"Ú".toCharArray(),
"Û".toCharArray(),
"Ü".toCharArray(),
"Ý".toCharArray(),
"Þ".toCharArray(),
"ß".toCharArray(),
"à".toCharArray(),
"á".toCharArray(),
"â".toCharArray(),
"ã".toCharArray(),
"ä".toCharArray(),
"å".toCharArray(),
"æ".toCharArray(),
"ç".toCharArray(),
"è".toCharArray(),
"é".toCharArray(),
"ê".toCharArray(),
"ë".toCharArray(),
"ì".toCharArray(),
"í".toCharArray(),
"î".toCharArray(),
"ï".toCharArray(),
"ð".toCharArray(),
"ñ".toCharArray(),
"ò".toCharArray(),
"ó".toCharArray(),
"ô".toCharArray(),
"õ".toCharArray(),
"ö".toCharArray(),
"÷".toCharArray(),
"ø".toCharArray(),
"ù".toCharArray(),
"ú".toCharArray(),
"û".toCharArray(),
"ü".toCharArray(),
"ý".toCharArray(),
"þ".toCharArray(),
"ÿ".toCharArray()
};
//----------------------------------------------------------
// The following is used to verify encodings
//----------------------------------------------------------
//
static public boolean validateEncoding(String encoding) {
return Charset.isSupported(encoding);
}
//----------------------------------------------------------
// Check if the given encoding is the ISO-8859-1 encoding
//----------------------------------------------------------
//
static public boolean isISO8859_1encoding(String encoding) {
return "ISO-8859-1".equals(encoding);
}
//----------------------------------------------------------
// Check if the given encoding is a UTF encoding
//----------------------------------------------------------
//
static public boolean isUTFencoding(String encoding) {
return UTF_CHARSET.contains(encoding);
}
//----------------------------------------------------------
// The following is used to verify "empty" Html elements.
// "Empty" Html elements are those that do not require an
// ending tag. For example,
or
...
//----------------------------------------------------------
static public boolean isEmptyElement(String name) {
char firstChar = name.charAt(0);
if (firstChar > _LAST_EMPTY_ELEMENT_START)
return false;
// Can we improve performance here? It's certainly slower to use
// a HashMap, at least if we can't assume the input name is lowercased.
String[] array = emptyElementArr[firstChar];
if (array != null) {
for (int i = array.length - 1; i >= 0; i--) {
if (name.equalsIgnoreCase(array[i]))
return true;
}
}
return false;
}
static private char _LAST_EMPTY_ELEMENT_START = 'p';
static private String[][] emptyElementArr =
new String[((int) _LAST_EMPTY_ELEMENT_START) + 1][];
static private String[] aNames = new String[]{
"area",
};
static private String[] bNames = new String[]{
"br",
"base",
"basefont",
};
static private String[] cNames = new String[]{
"col",
};
static private String[] fNames = new String[]{
"frame",
};
static private String[] hNames = new String[]{
"hr",
};
static private String[] iNames = new String[]{
"img",
"input",
"isindex",
};
static private String[] lNames = new String[]{
"link",
};
static private String[] mNames = new String[]{
"meta",
};
static private String[] pNames = new String[]{
"param",
};
static {
emptyElementArr['a'] = aNames;
emptyElementArr['A'] = aNames;
emptyElementArr['b'] = bNames;
emptyElementArr['B'] = bNames;
emptyElementArr['c'] = cNames;
emptyElementArr['C'] = cNames;
emptyElementArr['f'] = fNames;
emptyElementArr['F'] = fNames;
emptyElementArr['h'] = hNames;
emptyElementArr['H'] = hNames;
emptyElementArr['i'] = iNames;
emptyElementArr['I'] = iNames;
emptyElementArr['l'] = lNames;
emptyElementArr['L'] = lNames;
emptyElementArr['m'] = mNames;
emptyElementArr['M'] = mNames;
emptyElementArr['p'] = pNames;
emptyElementArr['P'] = pNames;
}
// ----------------------------------------------------------- Inner Classes
/**
* Private implementation of ByteArrayOutputStream.
*/
private static class MyByteArrayOutputStream extends ByteArrayOutputStream {
public MyByteArrayOutputStream(int initialCapacity) {
super(initialCapacity);
}
/**
* Obtain access to the underlying byte array to prevent
* unecessary temp object creation.
* @return buf
*/
public byte[] getBuf() {
return buf;
}
}
}