2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.sal.connect.netconf;
10 import static javax.xml.bind.DatatypeConverter.printBase64Binary;
11 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_DATA_NODEID;
12 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_NODEID;
13 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_PATH;
14 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toId;
16 import com.google.common.base.Preconditions;
17 import com.google.common.base.Strings;
18 import com.google.common.collect.ImmutableMap;
19 import com.google.gson.stream.JsonReader;
20 import java.io.IOException;
21 import java.io.InputStream;
22 import java.io.InputStreamReader;
23 import java.net.HttpURLConnection;
24 import java.net.MalformedURLException;
26 import java.net.URISyntaxException;
28 import java.net.URLConnection;
29 import java.nio.charset.Charset;
30 import java.nio.charset.StandardCharsets;
31 import java.util.AbstractMap;
32 import java.util.Collections;
33 import java.util.HashMap;
34 import java.util.Locale;
36 import java.util.Optional;
38 import java.util.concurrent.ExecutionException;
39 import java.util.regex.Pattern;
40 import javax.xml.parsers.DocumentBuilder;
41 import javax.xml.parsers.ParserConfigurationException;
42 import javax.xml.stream.XMLStreamException;
43 import javax.xml.transform.dom.DOMSource;
44 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
45 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
46 import org.opendaylight.netconf.sal.connect.api.NetconfDeviceSchemas;
47 import org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc;
48 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil;
49 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
50 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.ModulesState;
51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.module.list.Module;
52 import org.opendaylight.yangtools.util.xml.UntrustedXML;
53 import org.opendaylight.yangtools.yang.common.QName;
54 import org.opendaylight.yangtools.yang.common.Revision;
55 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
56 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
57 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
58 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
59 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
60 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
61 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
62 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
63 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
64 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
65 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
66 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
67 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
68 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
69 import org.opendaylight.yangtools.yang.model.repo.api.RevisionSourceIdentifier;
70 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
71 import org.slf4j.Logger;
72 import org.slf4j.LoggerFactory;
73 import org.w3c.dom.Document;
74 import org.w3c.dom.Element;
75 import org.w3c.dom.Node;
76 import org.xml.sax.SAXException;
79 * Holds URLs with YANG schema resources for all yang modules reported in
80 * ietf-netconf-yang-library/modules-state/modules node.
82 public final class LibraryModulesSchemas implements NetconfDeviceSchemas {
84 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
85 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
86 private static final SchemaContext LIBRARY_CONTEXT;
89 final ModuleInfoBackedContext moduleInfoBackedContext = ModuleInfoBackedContext.create();
90 moduleInfoBackedContext.registerModuleInfo(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang
91 .library.rev160621.$YangModuleInfoImpl.getInstance());
92 LIBRARY_CONTEXT = moduleInfoBackedContext.tryToCreateSchemaContext().get();
95 private final Map<QName, URL> availableModels;
97 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
98 YangInstanceIdentifier.builder().node(ModulesState.QNAME).node(Module.QNAME).build();
100 private static final ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC = Builders.containerBuilder()
101 .withNodeIdentifier(NETCONF_GET_NODEID)
102 .withChild(NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT))
105 private LibraryModulesSchemas(final Map<QName, URL> availableModels) {
106 this.availableModels = availableModels;
109 public Map<SourceIdentifier, URL> getAvailableModels() {
110 final Map<SourceIdentifier, URL> result = new HashMap<>();
111 for (final Map.Entry<QName, URL> entry : availableModels.entrySet()) {
112 final SourceIdentifier sId = RevisionSourceIdentifier.create(entry.getKey().getLocalName(),
113 entry.getKey().getRevision());
114 result.put(sId, entry.getValue());
121 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
123 * @param url URL pointing to yang library
124 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
126 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
127 Preconditions.checkNotNull(url);
129 final URL urlConnection = new URL(url);
130 final URLConnection connection = urlConnection.openConnection();
132 if (connection instanceof HttpURLConnection) {
133 connection.setRequestProperty("Accept", "application/xml");
134 final String userpass = username + ":" + password;
135 final String basicAuth = "Basic " + printBase64Binary(userpass.getBytes(StandardCharsets.UTF_8));
137 connection.setRequestProperty("Authorization", basicAuth);
140 return createFromURLConnection(connection);
142 } catch (final IOException e) {
143 LOG.warn("Unable to download yang library from {}", url, e);
144 return new LibraryModulesSchemas(Collections.emptyMap());
149 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
150 final DOMRpcResult moduleListNodeResult;
152 moduleListNodeResult =
153 deviceRpc.invokeRpc(NETCONF_GET_PATH, GET_MODULES_STATE_MODULE_LIST_RPC).get();
154 } catch (final InterruptedException e) {
155 Thread.currentThread().interrupt();
156 throw new RuntimeException(deviceId + ": Interrupted while waiting for response to "
157 + MODULES_STATE_MODULE_LIST, e);
158 } catch (final ExecutionException e) {
159 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
160 MODULES_STATE_MODULE_LIST, e);
161 return new LibraryModulesSchemas(Collections.emptyMap());
164 if (moduleListNodeResult.getErrors().isEmpty() == false) {
165 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
166 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.getErrors());
167 return new LibraryModulesSchemas(Collections.emptyMap());
171 final Optional<? extends NormalizedNode<?, ?>> modulesStateNode =
172 findModulesStateNode(moduleListNodeResult.getResult());
173 if (modulesStateNode.isPresent()) {
174 Preconditions.checkState(modulesStateNode.get() instanceof ContainerNode,
175 "Expecting container containing schemas, but was %s", modulesStateNode.get());
176 return create((ContainerNode) modulesStateNode.get());
179 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, toId(ModulesState.QNAME));
180 return new LibraryModulesSchemas(Collections.emptyMap());
183 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
184 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
185 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
186 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
187 modulesStateNode.getChild(moduleListNodeId);
188 Preconditions.checkState(moduleListNode.isPresent(),
189 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
190 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
191 "Unexpected structure for container: %s in : %s. Expecting a list",
192 moduleListNodeId, modulesStateNode);
194 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
195 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
196 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
197 if (schemaMappingEntry.isPresent()) {
198 schemasMapping.put(createFromEntry(moduleNode).get());
202 return new LibraryModulesSchemas(schemasMapping.build());
206 * Resolves URLs with YANG schema resources from modules-state.
207 * @param url URL pointing to yang library
208 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
210 public static LibraryModulesSchemas create(final String url) {
211 Preconditions.checkNotNull(url);
213 final URL urlConnection = new URL(url);
214 final URLConnection connection = urlConnection.openConnection();
216 if (connection instanceof HttpURLConnection) {
217 connection.setRequestProperty("Accept", "application/xml");
220 return createFromURLConnection(connection);
222 } catch (final IOException e) {
223 LOG.warn("Unable to download yang library from {}", url, e);
224 return new LibraryModulesSchemas(Collections.emptyMap());
228 private static Optional<? extends NormalizedNode<?, ?>> findModulesStateNode(final NormalizedNode<?, ?> result) {
229 if (result == null) {
230 return Optional.empty();
232 final Optional<DataContainerChild<?, ?>> dataNode =
233 ((DataContainerNode<?>) result).getChild(NETCONF_DATA_NODEID);
234 if (dataNode.isPresent() == false) {
235 return Optional.empty();
238 return ((DataContainerNode<?>) dataNode.get()).getChild(toId(ModulesState.QNAME));
241 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
243 String contentType = connection.getContentType();
245 // TODO try to guess Json also from intput stream
246 if (guessJsonFromFileName(connection.getURL().getFile())) {
247 contentType = "application/json";
250 Preconditions.checkNotNull(contentType, "Content type unknown");
251 Preconditions.checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
252 "Only XML and JSON types are supported.");
253 try (InputStream in = connection.getInputStream()) {
254 final Optional<NormalizedNode<?, ?>> optionalModulesStateNode =
255 contentType.equals("application/json") ? readJson(in) : readXml(in);
257 if (!optionalModulesStateNode.isPresent()) {
258 return new LibraryModulesSchemas(Collections.emptyMap());
261 final NormalizedNode<?, ?> modulesStateNode = optionalModulesStateNode.get();
262 Preconditions.checkState(modulesStateNode.getNodeType().equals(ModulesState.QNAME),
263 "Wrong QName %s", modulesStateNode.getNodeType());
264 Preconditions.checkState(modulesStateNode instanceof ContainerNode,
265 "Expecting container containing module list, but was %s", modulesStateNode);
267 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
268 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
269 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
270 ((ContainerNode) modulesStateNode).getChild(moduleListNodeId);
271 Preconditions.checkState(moduleListNode.isPresent(),
272 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
273 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
274 "Unexpected structure for container: %s in : %s. Expecting a list",
275 moduleListNodeId, modulesStateNode);
277 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
278 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
279 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
280 if (schemaMappingEntry.isPresent()) {
281 schemasMapping.put(createFromEntry(moduleNode).get());
285 return new LibraryModulesSchemas(schemasMapping.build());
286 } catch (final IOException e) {
287 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
288 return new LibraryModulesSchemas(Collections.emptyMap());
292 private static boolean guessJsonFromFileName(final String fileName) {
293 String extension = "";
294 final int i = fileName.lastIndexOf(46);
296 extension = fileName.substring(i).toLowerCase(Locale.ROOT);
299 return extension.equals(".json");
302 private static Optional<NormalizedNode<?, ?>> readJson(final InputStream in) {
303 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
304 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
306 final JsonParserStream jsonParser = JsonParserStream.create(writer, LIBRARY_CONTEXT);
307 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
309 jsonParser.parse(reader);
311 return resultHolder.isFinished() ? Optional.of(resultHolder.getResult()) : Optional.empty();
314 private static Optional<NormalizedNode<?, ?>> readXml(final InputStream in) {
316 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
318 final Document read = docBuilder.parse(in);
319 final Document doc = docBuilder.newDocument();
320 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
322 doc.appendChild(rootElement);
324 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
325 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
326 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
327 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
328 rootElement.appendChild(module);
330 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
331 read.getElementsByTagName("module").item(i).getTextContent());
335 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
336 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
337 final XmlParserStream xmlParser = XmlParserStream.create(writer, LIBRARY_CONTEXT,
338 LIBRARY_CONTEXT.getDataChildByName(ModulesState.QNAME));
339 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
340 final NormalizedNode<?, ?> parsed = resultHolder.getResult();
341 return Optional.of(parsed);
342 } catch (XMLStreamException | URISyntaxException | IOException | ParserConfigurationException
344 LOG.warn("Unable to parse yang library xml content", e);
347 return Optional.empty();
350 private static Optional<Map.Entry<QName, URL>> createFromEntry(final MapEntryNode moduleNode) {
351 Preconditions.checkArgument(
352 moduleNode.getNodeType().equals(Module.QNAME), "Wrong QName %s", moduleNode.getNodeType());
354 YangInstanceIdentifier.NodeIdentifier childNodeId =
355 new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "name"));
356 final String moduleName = getSingleChildNodeValue(moduleNode, childNodeId).get();
358 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "revision"));
359 final Optional<String> revision = getSingleChildNodeValue(moduleNode, childNodeId);
360 if (revision.isPresent()) {
361 if (!Revision.STRING_FORMAT_PATTERN.matcher(revision.get()).matches()) {
362 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
363 return Optional.empty();
367 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
368 // don't fail if schema node is not present, just skip the entry or add some default URL
369 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "schema"));
370 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, childNodeId);
372 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "namespace"));
373 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, childNodeId).get();
375 final QName moduleQName = revision.isPresent()
376 ? QName.create(moduleNameSpace, revision.get(), moduleName)
377 : QName.create(URI.create(moduleNameSpace), moduleName);
380 return Optional.of(new AbstractMap.SimpleImmutableEntry<>(
381 moduleQName, new URL(schemaUriAsString.get())));
382 } catch (final MalformedURLException e) {
383 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
384 moduleNode, schemaUriAsString.get());
385 return Optional.empty();
389 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode,
390 final YangInstanceIdentifier.NodeIdentifier childNodeId) {
391 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> node =
392 schemaNode.getChild(childNodeId);
393 Preconditions.checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
394 return getValueOfSimpleNode(node.get());
397 private static Optional<String> getValueOfSimpleNode(
398 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> node) {
399 final String valueStr = node.getValue().toString();
400 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
404 public Set<QName> getAvailableYangSchemasQNames() {