From 3c4fee1db116c11d4f04727cfe076d7c94daeaf2 Mon Sep 17 00:00:00 2001
From: yanzhaofeige <yanzhaofeige@qq.com>
Date: Mon, 30 Sep 2024 12:10:57 +0800
Subject: [PATCH] init

---
 cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/html/EscapeUtil.java |  167 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 167 insertions(+), 0 deletions(-)

diff --git a/cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/html/EscapeUtil.java b/cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/html/EscapeUtil.java
new file mode 100644
index 0000000..373a92a
--- /dev/null
+++ b/cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/html/EscapeUtil.java
@@ -0,0 +1,167 @@
+package com.odcc.cpzidc.common.utils.html;
+
+import com.odcc.cpzidc.common.utils.StringUtils;
+
+/**
+ * 转义和反转义工具类
+ * 
+ * @author ruoyi
+ */
+public class EscapeUtil
+{
+    public static final String RE_HTML_MARK = "(<[^<]*?>)|(<[\\s]*?/[^<]*?>)|(<[^<]*?/[\\s]*?>)";
+
+    private static final char[][] TEXT = new char[64][];
+
+    static
+    {
+        for (int i = 0; i < 64; i++)
+        {
+            TEXT[i] = new char[] { (char) i };
+        }
+
+        // special HTML characters
+        TEXT['\''] = "&#039;".toCharArray(); // 单引号
+        TEXT['"'] = "&#34;".toCharArray(); // 双引号
+        TEXT['&'] = "&#38;".toCharArray(); // &符
+        TEXT['<'] = "&#60;".toCharArray(); // 小于号
+        TEXT['>'] = "&#62;".toCharArray(); // 大于号
+    }
+
+    /**
+     * 转义文本中的HTML字符为安全的字符
+     * 
+     * @param text 被转义的文本
+     * @return 转义后的文本
+     */
+    public static String escape(String text)
+    {
+        return encode(text);
+    }
+
+    /**
+     * 还原被转义的HTML特殊字符
+     * 
+     * @param content 包含转义符的HTML内容
+     * @return 转换后的字符串
+     */
+    public static String unescape(String content)
+    {
+        return decode(content);
+    }
+
+    /**
+     * 清除所有HTML标签，但是不删除标签内的内容
+     * 
+     * @param content 文本
+     * @return 清除标签后的文本
+     */
+    public static String clean(String content)
+    {
+        return new HTMLFilter().filter(content);
+    }
+
+    /**
+     * Escape编码
+     * 
+     * @param text 被编码的文本
+     * @return 编码后的字符
+     */
+    private static String encode(String text)
+    {
+        if (StringUtils.isEmpty(text))
+        {
+            return StringUtils.EMPTY;
+        }
+
+        final StringBuilder tmp = new StringBuilder(text.length() * 6);
+        char c;
+        for (int i = 0; i < text.length(); i++)
+        {
+            c = text.charAt(i);
+            if (c < 256)
+            {
+                tmp.append("%");
+                if (c < 16)
+                {
+                    tmp.append("0");
+                }
+                tmp.append(Integer.toString(c, 16));
+            }
+            else
+            {
+                tmp.append("%u");
+                if (c <= 0xfff)
+                {
+                    // issue#I49JU8@Gitee
+                    tmp.append("0");
+                }
+                tmp.append(Integer.toString(c, 16));
+            }
+        }
+        return tmp.toString();
+    }
+
+    /**
+     * Escape解码
+     * 
+     * @param content 被转义的内容
+     * @return 解码后的字符串
+     */
+    public static String decode(String content)
+    {
+        if (StringUtils.isEmpty(content))
+        {
+            return content;
+        }
+
+        StringBuilder tmp = new StringBuilder(content.length());
+        int lastPos = 0, pos = 0;
+        char ch;
+        while (lastPos < content.length())
+        {
+            pos = content.indexOf("%", lastPos);
+            if (pos == lastPos)
+            {
+                if (content.charAt(pos + 1) == 'u')
+                {
+                    ch = (char) Integer.parseInt(content.substring(pos + 2, pos + 6), 16);
+                    tmp.append(ch);
+                    lastPos = pos + 6;
+                }
+                else
+                {
+                    ch = (char) Integer.parseInt(content.substring(pos + 1, pos + 3), 16);
+                    tmp.append(ch);
+                    lastPos = pos + 3;
+                }
+            }
+            else
+            {
+                if (pos == -1)
+                {
+                    tmp.append(content.substring(lastPos));
+                    lastPos = content.length();
+                }
+                else
+                {
+                    tmp.append(content.substring(lastPos, pos));
+                    lastPos = pos;
+                }
+            }
+        }
+        return tmp.toString();
+    }
+
+    public static void main(String[] args)
+    {
+        String html = "<script>alert(1);</script>";
+        String escape = EscapeUtil.escape(html);
+        // String html = "<scr<script>ipt>alert(\"XSS\")</scr<script>ipt>";
+        // String html = "<123";
+        // String html = "123>";
+        System.out.println("clean: " + EscapeUtil.clean(html));
+        System.out.println("escape: " + escape);
+        System.out.println("unescape: " + EscapeUtil.unescape(escape));
+    }
+}

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