1 files changed, 112 insertions, 0 deletions
diff --git a/common-app-api/src/main/java/org/openecomp/sdc/common/util/HtmlCleaner.java b/common-app-api/src/main/java/org/openecomp/sdc/common/util/HtmlCleaner.java
new file mode 100644
index 0000000000..4cbd9a7760
--- /dev/null
+++ b/common-app-api/src/main/java/org/openecomp/sdc/common/util/HtmlCleaner.java
@@ -0,0 +1,112 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.common.util;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.swing.text.html.HTML;
+import javax.swing.text.html.HTML.Tag;
+
+import org.apache.commons.lang3.StringEscapeUtils;
+
+public class HtmlCleaner {
+
+	private static Set<String> htmlTags = new HashSet<>();
+
+	private static String patternHtmlFullTagStr = "</?\\w+((\\s+\\w+(\\s*=\\s*(?:\".*?\"|'.*?'|[\\^'\">\\s]+))?)+\\s*|\\s*)/?>";
+
+	private static String patternHtmlTagOnlyStr = "</?(\\w+)[^>]*/?>";
+
+	private static Pattern onlyTagPattern = Pattern.compile(patternHtmlTagOnlyStr);
+
+	private static Pattern fullTagPattern = Pattern.compile(patternHtmlFullTagStr);
+
+	static {
+		Tag[] allTags = HTML.getAllTags();
+		for (Tag tag : allTags) {
+			htmlTags.add(tag.toString().toLowerCase());
+		}
+	}
+
+	public static String stripHtml(String input) {
+
+		return stripHtml(input, false);
+
+	}
+
+	public static String stripHtml(String input, boolean toEscape) {
+
+		if (input == null || true == input.isEmpty()) {
+			return input;
+		}
+
+		Matcher matcher = onlyTagPattern.matcher(input);
+
+		Set<String> tagsToRemove = new HashSet<>();
+
+		while (matcher.find()) {
+
+			int start = matcher.start();
+			int end = matcher.end();
+
+			String matchTag = input.substring(start, end);
+
+			int groupCount = matcher.groupCount();
+
+			if (groupCount > 0) {
+				String tag = matcher.group(1);
+				if (tag != null && htmlTags.contains(tag.toLowerCase())) {
+					if (false == tagsToRemove.contains(matchTag)) {
+						tagsToRemove.add(matchTag);
+					}
+				}
+			}
+		}
+
+		String stripHtmlStr = removeTagsFromString(tagsToRemove, input);
+
+		if (stripHtmlStr != null) {
+			if (true == toEscape) {
+				stripHtmlStr = StringEscapeUtils.escapeHtml4(stripHtmlStr);
+			}
+		}
+
+		return stripHtmlStr;
+
+	}
+
+	private static String removeTagsFromString(Set<String> tagsToRemove, String input) {
+
+		String stripStr = input;
+		if (input == null || true == tagsToRemove.isEmpty()) {
+			return input;
+		}
+
+		for (String tag : tagsToRemove) {
+			stripStr = stripStr.replaceAll(tag, "");
+		}
+		return stripStr;
+	}
+
+}