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_QNAME;
14 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toId;
15 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toPath;
17 import com.google.common.base.Preconditions;
18 import com.google.common.base.Strings;
19 import com.google.common.collect.ImmutableMap;
20 import com.google.common.collect.Maps;
21 import com.google.gson.stream.JsonReader;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.InputStreamReader;
25 import java.net.HttpURLConnection;
26 import java.net.MalformedURLException;
28 import java.net.URISyntaxException;
30 import java.net.URLConnection;
31 import java.nio.charset.Charset;
32 import java.nio.charset.StandardCharsets;
33 import java.util.AbstractMap;
34 import java.util.Collections;
35 import java.util.Locale;
37 import java.util.Optional;
39 import java.util.concurrent.ExecutionException;
40 import java.util.regex.Pattern;
41 import javax.xml.parsers.DocumentBuilder;
42 import javax.xml.parsers.ParserConfigurationException;
43 import javax.xml.stream.XMLStreamException;
44 import javax.xml.transform.dom.DOMSource;
45 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
46 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
47 import org.opendaylight.netconf.sal.connect.api.NetconfDeviceSchemas;
48 import org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc;
49 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil;
50 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.ModulesState;
52 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.module.list.Module;
53 import org.opendaylight.yangtools.util.xml.UntrustedXML;
54 import org.opendaylight.yangtools.yang.common.QName;
55 import org.opendaylight.yangtools.yang.common.Revision;
56 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
57 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
58 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
59 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
60 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
61 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
62 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
63 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
64 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
65 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
66 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
67 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
68 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
69 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
70 import org.opendaylight.yangtools.yang.model.repo.api.RevisionSourceIdentifier;
71 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
72 import org.slf4j.Logger;
73 import org.slf4j.LoggerFactory;
74 import org.w3c.dom.Document;
75 import org.w3c.dom.Element;
76 import org.w3c.dom.Node;
77 import org.xml.sax.SAXException;
80 * Holds URLs with YANG schema resources for all yang modules reported in
81 * ietf-netconf-yang-library/modules-state/modules node.
83 public final class LibraryModulesSchemas implements NetconfDeviceSchemas {
85 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
86 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
87 private static final SchemaContext LIBRARY_CONTEXT;
90 final ModuleInfoBackedContext moduleInfoBackedContext = ModuleInfoBackedContext.create();
91 moduleInfoBackedContext.registerModuleInfo(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang
92 .library.rev160621.$YangModuleInfoImpl.getInstance());
93 LIBRARY_CONTEXT = moduleInfoBackedContext.tryToCreateSchemaContext().get();
96 private final Map<QName, URL> availableModels;
98 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
99 YangInstanceIdentifier.builder().node(ModulesState.QNAME).node(Module.QNAME).build();
101 private static final ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC;
104 final DataContainerChild<?, ?> filter =
105 NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT);
106 GET_MODULES_STATE_MODULE_LIST_RPC =
107 Builders.containerBuilder().withNodeIdentifier(NETCONF_GET_NODEID).withChild(filter).build();
110 private LibraryModulesSchemas(final Map<QName, URL> availableModels) {
111 this.availableModels = availableModels;
114 public Map<SourceIdentifier, URL> getAvailableModels() {
115 final Map<SourceIdentifier, URL> result = Maps.newHashMap();
116 for (final Map.Entry<QName, URL> entry : availableModels.entrySet()) {
117 final SourceIdentifier sId = RevisionSourceIdentifier
118 .create(entry.getKey().getLocalName(), entry.getKey().getRevision());
119 result.put(sId, entry.getValue());
127 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
129 * @param url URL pointing to yang library
130 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
132 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
133 Preconditions.checkNotNull(url);
135 final URL urlConnection = new URL(url);
136 final URLConnection connection = urlConnection.openConnection();
138 if (connection instanceof HttpURLConnection) {
139 connection.setRequestProperty("Accept", "application/xml");
140 final String userpass = username + ":" + password;
141 final String basicAuth = "Basic " + printBase64Binary(userpass.getBytes(StandardCharsets.UTF_8));
143 connection.setRequestProperty("Authorization", basicAuth);
146 return createFromURLConnection(connection);
148 } catch (final IOException e) {
149 LOG.warn("Unable to download yang library from {}", url, e);
150 return new LibraryModulesSchemas(Collections.emptyMap());
155 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
156 final DOMRpcResult moduleListNodeResult;
158 moduleListNodeResult =
159 deviceRpc.invokeRpc(toPath(NETCONF_GET_QNAME), GET_MODULES_STATE_MODULE_LIST_RPC).get();
160 } catch (final InterruptedException e) {
161 Thread.currentThread().interrupt();
162 throw new RuntimeException(deviceId + ": Interrupted while waiting for response to "
163 + MODULES_STATE_MODULE_LIST, e);
164 } catch (final ExecutionException e) {
165 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
166 MODULES_STATE_MODULE_LIST, e);
167 return new LibraryModulesSchemas(Collections.emptyMap());
170 if (moduleListNodeResult.getErrors().isEmpty() == false) {
171 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
172 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.getErrors());
173 return new LibraryModulesSchemas(Collections.emptyMap());
177 final Optional<? extends NormalizedNode<?, ?>> modulesStateNode =
178 findModulesStateNode(moduleListNodeResult.getResult());
179 if (modulesStateNode.isPresent()) {
180 Preconditions.checkState(modulesStateNode.get() instanceof ContainerNode,
181 "Expecting container containing schemas, but was %s", modulesStateNode.get());
182 return create((ContainerNode) modulesStateNode.get());
185 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, toId(ModulesState.QNAME));
186 return new LibraryModulesSchemas(Collections.emptyMap());
189 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
190 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
191 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
192 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
193 modulesStateNode.getChild(moduleListNodeId);
194 Preconditions.checkState(moduleListNode.isPresent(),
195 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
196 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
197 "Unexpected structure for container: %s in : %s. Expecting a list",
198 moduleListNodeId, modulesStateNode);
200 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
201 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
202 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
203 if (schemaMappingEntry.isPresent()) {
204 schemasMapping.put(createFromEntry(moduleNode).get());
208 return new LibraryModulesSchemas(schemasMapping.build());
212 * Resolves URLs with YANG schema resources from modules-state.
213 * @param url URL pointing to yang library
214 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
216 public static LibraryModulesSchemas create(final String url) {
217 Preconditions.checkNotNull(url);
219 final URL urlConnection = new URL(url);
220 final URLConnection connection = urlConnection.openConnection();
222 if (connection instanceof HttpURLConnection) {
223 connection.setRequestProperty("Accept", "application/xml");
226 return createFromURLConnection(connection);
228 } catch (final IOException e) {
229 LOG.warn("Unable to download yang library from {}", url, e);
230 return new LibraryModulesSchemas(Collections.emptyMap());
234 private static Optional<? extends NormalizedNode<?, ?>> findModulesStateNode(final NormalizedNode<?, ?> result) {
235 if (result == null) {
236 return Optional.empty();
238 final Optional<DataContainerChild<?, ?>> dataNode =
239 ((DataContainerNode<?>) result).getChild(NETCONF_DATA_NODEID);
240 if (dataNode.isPresent() == false) {
241 return Optional.empty();
244 return ((DataContainerNode<?>) dataNode.get()).getChild(toId(ModulesState.QNAME));
247 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
249 String contentType = connection.getContentType();
251 // TODO try to guess Json also from intput stream
252 if (guessJsonFromFileName(connection.getURL().getFile())) {
253 contentType = "application/json";
256 Preconditions.checkNotNull(contentType, "Content type unknown");
257 Preconditions.checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
258 "Only XML and JSON types are supported.");
259 try (InputStream in = connection.getInputStream()) {
260 final Optional<NormalizedNode<?, ?>> optionalModulesStateNode =
261 contentType.equals("application/json") ? readJson(in) : readXml(in);
263 if (!optionalModulesStateNode.isPresent()) {
264 return new LibraryModulesSchemas(Collections.emptyMap());
267 final NormalizedNode<?, ?> modulesStateNode = optionalModulesStateNode.get();
268 Preconditions.checkState(modulesStateNode.getNodeType().equals(ModulesState.QNAME),
269 "Wrong QName %s", modulesStateNode.getNodeType());
270 Preconditions.checkState(modulesStateNode instanceof ContainerNode,
271 "Expecting container containing module list, but was %s", modulesStateNode);
273 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
274 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
275 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
276 ((ContainerNode) modulesStateNode).getChild(moduleListNodeId);
277 Preconditions.checkState(moduleListNode.isPresent(),
278 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
279 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
280 "Unexpected structure for container: %s in : %s. Expecting a list",
281 moduleListNodeId, modulesStateNode);
283 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
284 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
285 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
286 if (schemaMappingEntry.isPresent()) {
287 schemasMapping.put(createFromEntry(moduleNode).get());
291 return new LibraryModulesSchemas(schemasMapping.build());
292 } catch (final IOException e) {
293 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
294 return new LibraryModulesSchemas(Collections.emptyMap());
298 private static boolean guessJsonFromFileName(final String fileName) {
299 String extension = "";
300 final int i = fileName.lastIndexOf(46);
302 extension = fileName.substring(i).toLowerCase(Locale.ROOT);
305 return extension.equals(".json");
308 private static Optional<NormalizedNode<?, ?>> readJson(final InputStream in) {
309 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
310 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
312 final JsonParserStream jsonParser = JsonParserStream.create(writer, LIBRARY_CONTEXT);
313 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
315 jsonParser.parse(reader);
317 return resultHolder.isFinished() ? Optional.of(resultHolder.getResult()) : Optional.empty();
320 private static Optional<NormalizedNode<?, ?>> readXml(final InputStream in) {
322 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
324 final Document read = docBuilder.parse(in);
325 final Document doc = docBuilder.newDocument();
326 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
328 doc.appendChild(rootElement);
330 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
331 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
332 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
333 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
334 rootElement.appendChild(module);
336 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
337 read.getElementsByTagName("module").item(i).getTextContent());
341 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
342 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
343 final XmlParserStream xmlParser = XmlParserStream.create(writer, LIBRARY_CONTEXT,
344 LIBRARY_CONTEXT.getDataChildByName(ModulesState.QNAME));
345 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
346 final NormalizedNode<?, ?> parsed = resultHolder.getResult();
347 return Optional.of(parsed);
348 } catch (XMLStreamException | URISyntaxException | IOException | ParserConfigurationException
350 LOG.warn("Unable to parse yang library xml content", e);
353 return Optional.empty();
356 private static Optional<Map.Entry<QName, URL>> createFromEntry(final MapEntryNode moduleNode) {
357 Preconditions.checkArgument(
358 moduleNode.getNodeType().equals(Module.QNAME), "Wrong QName %s", moduleNode.getNodeType());
360 YangInstanceIdentifier.NodeIdentifier childNodeId =
361 new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "name"));
362 final String moduleName = getSingleChildNodeValue(moduleNode, childNodeId).get();
364 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "revision"));
365 final Optional<String> revision = getSingleChildNodeValue(moduleNode, childNodeId);
366 if (revision.isPresent()) {
367 if (!Revision.STRING_FORMAT_PATTERN.matcher(revision.get()).matches()) {
368 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
369 return Optional.empty();
373 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
374 // don't fail if schema node is not present, just skip the entry or add some default URL
375 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "schema"));
376 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, childNodeId);
378 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "namespace"));
379 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, childNodeId).get();
381 final QName moduleQName = revision.isPresent()
382 ? QName.create(moduleNameSpace, revision.get(), moduleName)
383 : QName.create(URI.create(moduleNameSpace), moduleName);
386 return Optional.of(new AbstractMap.SimpleImmutableEntry<>(
387 moduleQName, new URL(schemaUriAsString.get())));
388 } catch (final MalformedURLException e) {
389 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
390 moduleNode, schemaUriAsString.get());
391 return Optional.empty();
395 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode,
396 final YangInstanceIdentifier.NodeIdentifier childNodeId) {
397 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> node =
398 schemaNode.getChild(childNodeId);
399 Preconditions.checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
400 return getValueOfSimpleNode(node.get());
403 private static Optional<String> getValueOfSimpleNode(
404 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> node) {
405 final String valueStr = node.getValue().toString();
406 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
410 public Set<QName> getAvailableYangSchemasQNames() {