io.honeybadger.com.github.mustachejava.util.HtmlEscaper Maven / Gradle / Ivy
package com.github.mustachejava.util;
import com.github.mustachejava.MustacheException;
import java.io.IOException;
import java.io.Writer;
/**
* Escapes user data that you wish to include in HTML pages.
*/
public class HtmlEscaper {
private static char[][] LT_96 = new char[97][];
static {
char[] AMP = "&".toCharArray();
char[] LT = "<".toCharArray();
char[] GT = ">".toCharArray();
char[] DQ = """.toCharArray();
char[] SQ = "'".toCharArray();
char[] BQ = "`".toCharArray();
char[] EQ = "=".toCharArray();
for (int c = 0; c < LT_96.length; c++) {
if (c <= 13) {
LT_96[c] = ("&#" + String.valueOf(c) + ";").toCharArray();
} else {
switch (c) {
case '&':
LT_96[c] = AMP;
break;
case '<':
LT_96[c] = LT;
break;
case '>':
LT_96[c] = GT;
break;
case '"':
LT_96[c] = DQ;
break;
case '\'':
LT_96[c] = SQ;
break;
case '=':
LT_96[c] = EQ;
break;
case '`':
LT_96[c] = BQ;
break;
default:
LT_96[c] = new char[]{(char) c};
break;
}
}
}
}
public static void escape(String value, Writer writer) {
try {
int length = value.length();
for (int i = 0; i < length; i++) {
char c = value.charAt(i);
if (c <= 96) {
writer.write(LT_96[c]);
} else {
writer.write(c);
}
}
} catch (IOException e) {
throw new MustacheException("Failed to encode value: " + value, e);
}
}
}