添加HTML过滤器,用于去除XSS漏洞隐患
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				| @ -58,7 +58,7 @@ public class EscapeUtil | ||||
|      */ | ||||
|     public static String clean(String content) | ||||
|     { | ||||
|         return content.replaceAll(RE_HTML_MARK, ""); | ||||
|         return new HTMLFilter().filter(content); | ||||
|     } | ||||
| 
 | ||||
|     /** | ||||
|  | ||||
							
								
								
									
										568
									
								
								ruoyi/src/main/java/com/ruoyi/common/utils/html/HTMLFilter.java
									
									
									
									
									
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								ruoyi/src/main/java/com/ruoyi/common/utils/html/HTMLFilter.java
									
									
									
									
									
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							| @ -0,0 +1,568 @@ | ||||
| package com.ruoyi.common.utils.html; | ||||
| 
 | ||||
| import java.util.ArrayList; | ||||
| import java.util.Collections; | ||||
| import java.util.HashMap; | ||||
| import java.util.List; | ||||
| import java.util.Map; | ||||
| import java.util.concurrent.ConcurrentHashMap; | ||||
| import java.util.concurrent.ConcurrentMap; | ||||
| import java.util.regex.Matcher; | ||||
| import java.util.regex.Pattern; | ||||
| 
 | ||||
| /** | ||||
|  * HTML过滤器,用于去除XSS漏洞隐患。 | ||||
|  * | ||||
|  * @author ruoyi | ||||
|  */ | ||||
| public final class HTMLFilter | ||||
| { | ||||
|     /** | ||||
|      * regex flag union representing /si modifiers in php | ||||
|      **/ | ||||
|     private static final int REGEX_FLAGS_SI = Pattern.CASE_INSENSITIVE | Pattern.DOTALL; | ||||
|     private static final Pattern P_COMMENTS = Pattern.compile("<!--(.*?)-->", Pattern.DOTALL); | ||||
|     private static final Pattern P_COMMENT = Pattern.compile("^!--(.*)--$", REGEX_FLAGS_SI); | ||||
|     private static final Pattern P_TAGS = Pattern.compile("<(.*?)>", Pattern.DOTALL); | ||||
|     private static final Pattern P_END_TAG = Pattern.compile("^/([a-z0-9]+)", REGEX_FLAGS_SI); | ||||
|     private static final Pattern P_START_TAG = Pattern.compile("^([a-z0-9]+)(.*?)(/?)$", REGEX_FLAGS_SI); | ||||
|     private static final Pattern P_QUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)=([\"'])(.*?)\\2", REGEX_FLAGS_SI); | ||||
|     private static final Pattern P_UNQUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)(=)([^\"\\s']+)", REGEX_FLAGS_SI); | ||||
|     private static final Pattern P_PROTOCOL = Pattern.compile("^([^:]+):", REGEX_FLAGS_SI); | ||||
|     private static final Pattern P_ENTITY = Pattern.compile("&#(\\d+);?"); | ||||
|     private static final Pattern P_ENTITY_UNICODE = Pattern.compile("&#x([0-9a-f]+);?"); | ||||
|     private static final Pattern P_ENCODE = Pattern.compile("%([0-9a-f]{2});?"); | ||||
|     private static final Pattern P_VALID_ENTITIES = Pattern.compile("&([^&;]*)(?=(;|&|$))"); | ||||
|     private static final Pattern P_VALID_QUOTES = Pattern.compile("(>|^)([^<]+?)(<|$)", Pattern.DOTALL); | ||||
|     private static final Pattern P_END_ARROW = Pattern.compile("^>"); | ||||
|     private static final Pattern P_BODY_TO_END = Pattern.compile("<([^>]*?)(?=<|$)"); | ||||
|     private static final Pattern P_XML_CONTENT = Pattern.compile("(^|>)([^<]*?)(?=>)"); | ||||
|     private static final Pattern P_STRAY_LEFT_ARROW = Pattern.compile("<([^>]*?)(?=<|$)"); | ||||
|     private static final Pattern P_STRAY_RIGHT_ARROW = Pattern.compile("(^|>)([^<]*?)(?=>)"); | ||||
|     private static final Pattern P_AMP = Pattern.compile("&"); | ||||
|     private static final Pattern P_QUOTE = Pattern.compile("\""); | ||||
|     private static final Pattern P_LEFT_ARROW = Pattern.compile("<"); | ||||
|     private static final Pattern P_RIGHT_ARROW = Pattern.compile(">"); | ||||
|     private static final Pattern P_BOTH_ARROWS = Pattern.compile("<>"); | ||||
| 
 | ||||
|     // @xxx could grow large... maybe use sesat's ReferenceMap | ||||
|     private static final ConcurrentMap<String, Pattern> P_REMOVE_PAIR_BLANKS = new ConcurrentHashMap<>(); | ||||
|     private static final ConcurrentMap<String, Pattern> P_REMOVE_SELF_BLANKS = new ConcurrentHashMap<>(); | ||||
| 
 | ||||
|     /** | ||||
|      * set of allowed html elements, along with allowed attributes for each element | ||||
|      **/ | ||||
|     private final Map<String, List<String>> vAllowed; | ||||
|     /** | ||||
|      * counts of open tags for each (allowable) html element | ||||
|      **/ | ||||
|     private final Map<String, Integer> vTagCounts = new HashMap<>(); | ||||
| 
 | ||||
|     /** | ||||
|      * html elements which must always be self-closing (e.g. "<img />") | ||||
|      **/ | ||||
|     private final String[] vSelfClosingTags; | ||||
|     /** | ||||
|      * html elements which must always have separate opening and closing tags (e.g. "<b></b>") | ||||
|      **/ | ||||
|     private final String[] vNeedClosingTags; | ||||
|     /** | ||||
|      * set of disallowed html elements | ||||
|      **/ | ||||
|     private final String[] vDisallowed; | ||||
|     /** | ||||
|      * attributes which should be checked for valid protocols | ||||
|      **/ | ||||
|     private final String[] vProtocolAtts; | ||||
|     /** | ||||
|      * allowed protocols | ||||
|      **/ | ||||
|     private final String[] vAllowedProtocols; | ||||
|     /** | ||||
|      * tags which should be removed if they contain no content (e.g. "<b></b>" or "<b />") | ||||
|      **/ | ||||
|     private final String[] vRemoveBlanks; | ||||
|     /** | ||||
|      * entities allowed within html markup | ||||
|      **/ | ||||
|     private final String[] vAllowedEntities; | ||||
|     /** | ||||
|      * flag determining whether comments are allowed in input String. | ||||
|      */ | ||||
|     private final boolean stripComment; | ||||
|     private final boolean encodeQuotes; | ||||
|     /** | ||||
|      * flag determining whether to try to make tags when presented with "unbalanced" angle brackets (e.g. "<b text </b>" | ||||
|      * becomes "<b> text </b>"). If set to false, unbalanced angle brackets will be html escaped. | ||||
|      */ | ||||
|     private final boolean alwaysMakeTags; | ||||
| 
 | ||||
|     /** | ||||
|      * Default constructor. | ||||
|      */ | ||||
|     public HTMLFilter() | ||||
|     { | ||||
|         vAllowed = new HashMap<>(); | ||||
| 
 | ||||
|         final ArrayList<String> a_atts = new ArrayList<>(); | ||||
|         a_atts.add("href"); | ||||
|         a_atts.add("target"); | ||||
|         vAllowed.put("a", a_atts); | ||||
| 
 | ||||
|         final ArrayList<String> img_atts = new ArrayList<>(); | ||||
|         img_atts.add("src"); | ||||
|         img_atts.add("width"); | ||||
|         img_atts.add("height"); | ||||
|         img_atts.add("alt"); | ||||
|         vAllowed.put("img", img_atts); | ||||
| 
 | ||||
|         final ArrayList<String> no_atts = new ArrayList<>(); | ||||
|         vAllowed.put("b", no_atts); | ||||
|         vAllowed.put("strong", no_atts); | ||||
|         vAllowed.put("i", no_atts); | ||||
|         vAllowed.put("em", no_atts); | ||||
| 
 | ||||
|         vSelfClosingTags = new String[] { "img" }; | ||||
|         vNeedClosingTags = new String[] { "a", "b", "strong", "i", "em" }; | ||||
|         vDisallowed = new String[] {}; | ||||
|         vAllowedProtocols = new String[] { "http", "mailto", "https" }; // no ftp. | ||||
|         vProtocolAtts = new String[] { "src", "href" }; | ||||
|         vRemoveBlanks = new String[] { "a", "b", "strong", "i", "em" }; | ||||
|         vAllowedEntities = new String[] { "amp", "gt", "lt", "quot" }; | ||||
|         stripComment = true; | ||||
|         encodeQuotes = true; | ||||
|         alwaysMakeTags = true; | ||||
|     } | ||||
| 
 | ||||
|     /** | ||||
|      * Map-parameter configurable constructor. | ||||
|      * | ||||
|      * @param conf map containing configuration. keys match field names. | ||||
|      */ | ||||
|     @SuppressWarnings("unchecked") | ||||
|     public HTMLFilter(final Map<String, Object> conf) | ||||
|     { | ||||
| 
 | ||||
|         assert conf.containsKey("vAllowed") : "configuration requires vAllowed"; | ||||
|         assert conf.containsKey("vSelfClosingTags") : "configuration requires vSelfClosingTags"; | ||||
|         assert conf.containsKey("vNeedClosingTags") : "configuration requires vNeedClosingTags"; | ||||
|         assert conf.containsKey("vDisallowed") : "configuration requires vDisallowed"; | ||||
|         assert conf.containsKey("vAllowedProtocols") : "configuration requires vAllowedProtocols"; | ||||
|         assert conf.containsKey("vProtocolAtts") : "configuration requires vProtocolAtts"; | ||||
|         assert conf.containsKey("vRemoveBlanks") : "configuration requires vRemoveBlanks"; | ||||
|         assert conf.containsKey("vAllowedEntities") : "configuration requires vAllowedEntities"; | ||||
| 
 | ||||
|         vAllowed = Collections.unmodifiableMap((HashMap<String, List<String>>) conf.get("vAllowed")); | ||||
|         vSelfClosingTags = (String[]) conf.get("vSelfClosingTags"); | ||||
|         vNeedClosingTags = (String[]) conf.get("vNeedClosingTags"); | ||||
|         vDisallowed = (String[]) conf.get("vDisallowed"); | ||||
|         vAllowedProtocols = (String[]) conf.get("vAllowedProtocols"); | ||||
|         vProtocolAtts = (String[]) conf.get("vProtocolAtts"); | ||||
|         vRemoveBlanks = (String[]) conf.get("vRemoveBlanks"); | ||||
|         vAllowedEntities = (String[]) conf.get("vAllowedEntities"); | ||||
|         stripComment = conf.containsKey("stripComment") ? (Boolean) conf.get("stripComment") : true; | ||||
|         encodeQuotes = conf.containsKey("encodeQuotes") ? (Boolean) conf.get("encodeQuotes") : true; | ||||
|         alwaysMakeTags = conf.containsKey("alwaysMakeTags") ? (Boolean) conf.get("alwaysMakeTags") : true; | ||||
|     } | ||||
| 
 | ||||
|     private void reset() | ||||
|     { | ||||
|         vTagCounts.clear(); | ||||
|     } | ||||
| 
 | ||||
|     // --------------------------------------------------------------- | ||||
|     // my versions of some PHP library functions | ||||
|     public static String chr(final int decimal) | ||||
|     { | ||||
|         return String.valueOf((char) decimal); | ||||
|     } | ||||
| 
 | ||||
|     public static String htmlSpecialChars(final String s) | ||||
|     { | ||||
|         String result = s; | ||||
|         result = regexReplace(P_AMP, "&", result); | ||||
|         result = regexReplace(P_QUOTE, """, result); | ||||
|         result = regexReplace(P_LEFT_ARROW, "<", result); | ||||
|         result = regexReplace(P_RIGHT_ARROW, ">", result); | ||||
|         return result; | ||||
|     } | ||||
| 
 | ||||
|     // --------------------------------------------------------------- | ||||
| 
 | ||||
|     /** | ||||
|      * given a user submitted input String, filter out any invalid or restricted html. | ||||
|      * | ||||
|      * @param input text (i.e. submitted by a user) than may contain html | ||||
|      * @return "clean" version of input, with only valid, whitelisted html elements allowed | ||||
|      */ | ||||
|     public String filter(final String input) | ||||
|     { | ||||
|         reset(); | ||||
|         String s = input; | ||||
| 
 | ||||
|         s = escapeComments(s); | ||||
| 
 | ||||
|         s = balanceHTML(s); | ||||
| 
 | ||||
|         s = checkTags(s); | ||||
| 
 | ||||
|         s = processRemoveBlanks(s); | ||||
| 
 | ||||
|         s = validateEntities(s); | ||||
| 
 | ||||
|         return s; | ||||
|     } | ||||
| 
 | ||||
|     public boolean isAlwaysMakeTags() | ||||
|     { | ||||
|         return alwaysMakeTags; | ||||
|     } | ||||
| 
 | ||||
|     public boolean isStripComments() | ||||
|     { | ||||
|         return stripComment; | ||||
|     } | ||||
| 
 | ||||
|     private String escapeComments(final String s) | ||||
|     { | ||||
|         final Matcher m = P_COMMENTS.matcher(s); | ||||
|         final StringBuffer buf = new StringBuffer(); | ||||
|         if (m.find()) | ||||
|         { | ||||
|             final String match = m.group(1); // (.*?) | ||||
|             m.appendReplacement(buf, Matcher.quoteReplacement("<!--" + htmlSpecialChars(match) + "-->")); | ||||
|         } | ||||
|         m.appendTail(buf); | ||||
| 
 | ||||
|         return buf.toString(); | ||||
|     } | ||||
| 
 | ||||
|     private String balanceHTML(String s) | ||||
|     { | ||||
|         if (alwaysMakeTags) | ||||
|         { | ||||
|             // | ||||
|             // try and form html | ||||
|             // | ||||
|             s = regexReplace(P_END_ARROW, "", s); | ||||
|             s = regexReplace(P_BODY_TO_END, "<$1>", s); | ||||
|             s = regexReplace(P_XML_CONTENT, "$1<$2", s); | ||||
| 
 | ||||
|         } | ||||
|         else | ||||
|         { | ||||
|             // | ||||
|             // escape stray brackets | ||||
|             // | ||||
|             s = regexReplace(P_STRAY_LEFT_ARROW, "<$1", s); | ||||
|             s = regexReplace(P_STRAY_RIGHT_ARROW, "$1$2><", s); | ||||
| 
 | ||||
|             // | ||||
|             // the last regexp causes '<>' entities to appear | ||||
|             // (we need to do a lookahead assertion so that the last bracket can | ||||
|             // be used in the next pass of the regexp) | ||||
|             // | ||||
|             s = regexReplace(P_BOTH_ARROWS, "", s); | ||||
|         } | ||||
| 
 | ||||
|         return s; | ||||
|     } | ||||
| 
 | ||||
|     private String checkTags(String s) | ||||
|     { | ||||
|         Matcher m = P_TAGS.matcher(s); | ||||
| 
 | ||||
|         final StringBuffer buf = new StringBuffer(); | ||||
|         while (m.find()) | ||||
|         { | ||||
|             String replaceStr = m.group(1); | ||||
|             replaceStr = processTag(replaceStr); | ||||
|             m.appendReplacement(buf, Matcher.quoteReplacement(replaceStr)); | ||||
|         } | ||||
|         m.appendTail(buf); | ||||
| 
 | ||||
|         // these get tallied in processTag | ||||
|         // (remember to reset before subsequent calls to filter method) | ||||
|         final StringBuilder sBuilder = new StringBuilder(buf.toString()); | ||||
|         for (String key : vTagCounts.keySet()) | ||||
|         { | ||||
|             for (int ii = 0; ii < vTagCounts.get(key); ii++) | ||||
|             { | ||||
|                 sBuilder.append("</").append(key).append(">"); | ||||
|             } | ||||
|         } | ||||
|         s = sBuilder.toString(); | ||||
| 
 | ||||
|         return s; | ||||
|     } | ||||
| 
 | ||||
|     private String processRemoveBlanks(final String s) | ||||
|     { | ||||
|         String result = s; | ||||
|         for (String tag : vRemoveBlanks) | ||||
|         { | ||||
|             if (!P_REMOVE_PAIR_BLANKS.containsKey(tag)) | ||||
|             { | ||||
|                 P_REMOVE_PAIR_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?></" + tag + ">")); | ||||
|             } | ||||
|             result = regexReplace(P_REMOVE_PAIR_BLANKS.get(tag), "", result); | ||||
|             if (!P_REMOVE_SELF_BLANKS.containsKey(tag)) | ||||
|             { | ||||
|                 P_REMOVE_SELF_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?/>")); | ||||
|             } | ||||
|             result = regexReplace(P_REMOVE_SELF_BLANKS.get(tag), "", result); | ||||
|         } | ||||
| 
 | ||||
|         return result; | ||||
|     } | ||||
| 
 | ||||
|     private static String regexReplace(final Pattern regex_pattern, final String replacement, final String s) | ||||
|     { | ||||
|         Matcher m = regex_pattern.matcher(s); | ||||
|         return m.replaceAll(replacement); | ||||
|     } | ||||
| 
 | ||||
|     private String processTag(final String s) | ||||
|     { | ||||
|         // ending tags | ||||
|         Matcher m = P_END_TAG.matcher(s); | ||||
|         if (m.find()) | ||||
|         { | ||||
|             final String name = m.group(1).toLowerCase(); | ||||
|             if (allowed(name)) | ||||
|             { | ||||
|                 if (false == inArray(name, vSelfClosingTags)) | ||||
|                 { | ||||
|                     if (vTagCounts.containsKey(name)) | ||||
|                     { | ||||
|                         vTagCounts.put(name, vTagCounts.get(name) - 1); | ||||
|                         return "</" + name + ">"; | ||||
|                     } | ||||
|                 } | ||||
|             } | ||||
|         } | ||||
| 
 | ||||
|         // starting tags | ||||
|         m = P_START_TAG.matcher(s); | ||||
|         if (m.find()) | ||||
|         { | ||||
|             final String name = m.group(1).toLowerCase(); | ||||
|             final String body = m.group(2); | ||||
|             String ending = m.group(3); | ||||
| 
 | ||||
|             // debug( "in a starting tag, name='" + name + "'; body='" + body + "'; ending='" + ending + "'" ); | ||||
|             if (allowed(name)) | ||||
|             { | ||||
|                 final StringBuilder params = new StringBuilder(); | ||||
| 
 | ||||
|                 final Matcher m2 = P_QUOTED_ATTRIBUTES.matcher(body); | ||||
|                 final Matcher m3 = P_UNQUOTED_ATTRIBUTES.matcher(body); | ||||
|                 final List<String> paramNames = new ArrayList<>(); | ||||
|                 final List<String> paramValues = new ArrayList<>(); | ||||
|                 while (m2.find()) | ||||
|                 { | ||||
|                     paramNames.add(m2.group(1)); // ([a-z0-9]+) | ||||
|                     paramValues.add(m2.group(3)); // (.*?) | ||||
|                 } | ||||
|                 while (m3.find()) | ||||
|                 { | ||||
|                     paramNames.add(m3.group(1)); // ([a-z0-9]+) | ||||
|                     paramValues.add(m3.group(3)); // ([^\"\\s']+) | ||||
|                 } | ||||
| 
 | ||||
|                 String paramName, paramValue; | ||||
|                 for (int ii = 0; ii < paramNames.size(); ii++) | ||||
|                 { | ||||
|                     paramName = paramNames.get(ii).toLowerCase(); | ||||
|                     paramValue = paramValues.get(ii); | ||||
| 
 | ||||
|                     // debug( "paramName='" + paramName + "'" ); | ||||
|                     // debug( "paramValue='" + paramValue + "'" ); | ||||
|                     // debug( "allowed? " + vAllowed.get( name ).contains( paramName ) ); | ||||
| 
 | ||||
|                     if (allowedAttribute(name, paramName)) | ||||
|                     { | ||||
|                         if (inArray(paramName, vProtocolAtts)) | ||||
|                         { | ||||
|                             paramValue = processParamProtocol(paramValue); | ||||
|                         } | ||||
|                         params.append(' ').append(paramName).append("=\"").append(paramValue).append("\""); | ||||
|                     } | ||||
|                 } | ||||
| 
 | ||||
|                 if (inArray(name, vSelfClosingTags)) | ||||
|                 { | ||||
|                     ending = " /"; | ||||
|                 } | ||||
| 
 | ||||
|                 if (inArray(name, vNeedClosingTags)) | ||||
|                 { | ||||
|                     ending = ""; | ||||
|                 } | ||||
| 
 | ||||
|                 if (ending == null || ending.length() < 1) | ||||
|                 { | ||||
|                     if (vTagCounts.containsKey(name)) | ||||
|                     { | ||||
|                         vTagCounts.put(name, vTagCounts.get(name) + 1); | ||||
|                     } | ||||
|                     else | ||||
|                     { | ||||
|                         vTagCounts.put(name, 1); | ||||
|                     } | ||||
|                 } | ||||
|                 else | ||||
|                 { | ||||
|                     ending = " /"; | ||||
|                 } | ||||
|                 return "<" + name + params + ending + ">"; | ||||
|             } | ||||
|             else | ||||
|             { | ||||
|                 return ""; | ||||
|             } | ||||
|         } | ||||
| 
 | ||||
|         // comments | ||||
|         m = P_COMMENT.matcher(s); | ||||
|         if (!stripComment && m.find()) | ||||
|         { | ||||
|             return "<" + m.group() + ">"; | ||||
|         } | ||||
| 
 | ||||
|         return ""; | ||||
|     } | ||||
| 
 | ||||
|     private String processParamProtocol(String s) | ||||
|     { | ||||
|         s = decodeEntities(s); | ||||
|         final Matcher m = P_PROTOCOL.matcher(s); | ||||
|         if (m.find()) | ||||
|         { | ||||
|             final String protocol = m.group(1); | ||||
|             if (!inArray(protocol, vAllowedProtocols)) | ||||
|             { | ||||
|                 // bad protocol, turn into local anchor link instead | ||||
|                 s = "#" + s.substring(protocol.length() + 1); | ||||
|                 if (s.startsWith("#//")) | ||||
|                 { | ||||
|                     s = "#" + s.substring(3); | ||||
|                 } | ||||
|             } | ||||
|         } | ||||
| 
 | ||||
|         return s; | ||||
|     } | ||||
| 
 | ||||
|     private String decodeEntities(String s) | ||||
|     { | ||||
|         StringBuffer buf = new StringBuffer(); | ||||
| 
 | ||||
|         Matcher m = P_ENTITY.matcher(s); | ||||
|         while (m.find()) | ||||
|         { | ||||
|             final String match = m.group(1); | ||||
|             final int decimal = Integer.decode(match).intValue(); | ||||
|             m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal))); | ||||
|         } | ||||
|         m.appendTail(buf); | ||||
|         s = buf.toString(); | ||||
| 
 | ||||
|         buf = new StringBuffer(); | ||||
|         m = P_ENTITY_UNICODE.matcher(s); | ||||
|         while (m.find()) | ||||
|         { | ||||
|             final String match = m.group(1); | ||||
|             final int decimal = Integer.valueOf(match, 16).intValue(); | ||||
|             m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal))); | ||||
|         } | ||||
|         m.appendTail(buf); | ||||
|         s = buf.toString(); | ||||
| 
 | ||||
|         buf = new StringBuffer(); | ||||
|         m = P_ENCODE.matcher(s); | ||||
|         while (m.find()) | ||||
|         { | ||||
|             final String match = m.group(1); | ||||
|             final int decimal = Integer.valueOf(match, 16).intValue(); | ||||
|             m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal))); | ||||
|         } | ||||
|         m.appendTail(buf); | ||||
|         s = buf.toString(); | ||||
| 
 | ||||
|         s = validateEntities(s); | ||||
|         return s; | ||||
|     } | ||||
| 
 | ||||
|     private String validateEntities(final String s) | ||||
|     { | ||||
|         StringBuffer buf = new StringBuffer(); | ||||
| 
 | ||||
|         // validate entities throughout the string | ||||
|         Matcher m = P_VALID_ENTITIES.matcher(s); | ||||
|         while (m.find()) | ||||
|         { | ||||
|             final String one = m.group(1); // ([^&;]*) | ||||
|             final String two = m.group(2); // (?=(;|&|$)) | ||||
|             m.appendReplacement(buf, Matcher.quoteReplacement(checkEntity(one, two))); | ||||
|         } | ||||
|         m.appendTail(buf); | ||||
| 
 | ||||
|         return encodeQuotes(buf.toString()); | ||||
|     } | ||||
| 
 | ||||
|     private String encodeQuotes(final String s) | ||||
|     { | ||||
|         if (encodeQuotes) | ||||
|         { | ||||
|             StringBuffer buf = new StringBuffer(); | ||||
|             Matcher m = P_VALID_QUOTES.matcher(s); | ||||
|             while (m.find()) | ||||
|             { | ||||
|                 final String one = m.group(1); // (>|^) | ||||
|                 final String two = m.group(2); // ([^<]+?) | ||||
|                 final String three = m.group(3); // (<|$) | ||||
|                 m.appendReplacement(buf, Matcher.quoteReplacement(one + regexReplace(P_QUOTE, """, two) + three)); | ||||
|             } | ||||
|             m.appendTail(buf); | ||||
|             return buf.toString(); | ||||
|         } | ||||
|         else | ||||
|         { | ||||
|             return s; | ||||
|         } | ||||
|     } | ||||
| 
 | ||||
|     private String checkEntity(final String preamble, final String term) | ||||
|     { | ||||
| 
 | ||||
|         return ";".equals(term) && isValidEntity(preamble) ? '&' + preamble : "&" + preamble; | ||||
|     } | ||||
| 
 | ||||
|     private boolean isValidEntity(final String entity) | ||||
|     { | ||||
|         return inArray(entity, vAllowedEntities); | ||||
|     } | ||||
| 
 | ||||
|     private static boolean inArray(final String s, final String[] array) | ||||
|     { | ||||
|         for (String item : array) | ||||
|         { | ||||
|             if (item != null && item.equals(s)) | ||||
|             { | ||||
|                 return true; | ||||
|             } | ||||
|         } | ||||
|         return false; | ||||
|     } | ||||
| 
 | ||||
|     private boolean allowed(final String name) | ||||
|     { | ||||
|         return (vAllowed.isEmpty() || vAllowed.containsKey(name)) && !inArray(name, vDisallowed); | ||||
|     } | ||||
| 
 | ||||
|     private boolean allowedAttribute(final String name, final String paramName) | ||||
|     { | ||||
|         return allowed(name) && (vAllowed.isEmpty() || vAllowed.get(name).contains(paramName)); | ||||
|     } | ||||
| } | ||||
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