2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Modifications Copyright (c) 2019 Samsung
8 * ================================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 * ============LICENSE_END=========================================================
23 package org.onap.so.apihandler.common;
26 import java.io.FileInputStream;
27 import java.io.IOException;
28 import javax.xml.XMLConstants;
29 import javax.xml.transform.Source;
30 import javax.xml.transform.stream.StreamSource;
31 import javax.xml.validation.Schema;
32 import javax.xml.validation.SchemaFactory;
33 import javax.xml.validation.Validator;
34 import com.google.common.base.Strings;
35 import org.apache.commons.io.IOUtils;
36 import org.onap.so.logger.ErrorCode;
37 import org.onap.so.logger.MessageEnum;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
40 import org.xml.sax.SAXException;
42 public class XMLValidator {
44 private static String XSDS_PATH;
47 String prefixMsoPropertiesPath = System.getProperty("mso.config.path");
48 if (prefixMsoPropertiesPath == null) {
49 prefixMsoPropertiesPath = "";
51 XSDS_PATH = prefixMsoPropertiesPath + "xsds/";
54 private String stringXsd;
55 private String errorMsg = null;
56 private SchemaFactory factory;
57 private Schema schema;
59 private static Logger logger = LoggerFactory.getLogger(XMLValidator.class);
62 public XMLValidator(String xsdFile) {
64 try (FileInputStream xsdStream = new FileInputStream(XSDS_PATH + xsdFile)) {
66 stringXsd = IOUtils.toString(xsdStream);
68 factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
69 factory.setResourceResolver(new PathResourceResolver(XSDS_PATH));
70 factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
72 String quotedXsd = stringXsd.replaceAll(""", "\"");
73 Source src = new StreamSource(new java.io.StringReader(quotedXsd));
74 schema = factory.newSchema(src);
76 } catch (IOException | SAXException e) {
78 logger.debug("Cannot open file {}", XSDS_PATH + xsdFile, e);
79 errorMsg = "ErrorDetails: xsd file " + xsdFile + "could not be opened - " + e.getMessage();
83 // Returns null when XML valid, otherwise returns error details.
84 public String isXmlValid(String stringXml) {
86 if (errorMsg != null && !errorMsg.isEmpty()) {
89 Source src2 = new StreamSource(new java.io.StringReader(stringXml));
90 Validator validator = schema.newValidator();
91 validator.validate(src2);
93 } catch (IOException | SAXException e) {
94 logger.debug("Exception: ", e);
95 return "ErrorDetails: " + e.getMessage();
97 } catch (Exception e) {
98 logger.error(Strings.repeat("{} ", 3), MessageEnum.APIH_CANNOT_READ_SCHEMA.toString(),
99 ErrorCode.SchemaError.getValue(), "APIH cannot read schema file", e);
101 return "ErrorDetails: " + "Unable to read the schema file";