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.stream.XMLStreamException;
42 import javax.xml.transform.dom.DOMSource;
43 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
44 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
45 import org.opendaylight.netconf.sal.connect.api.NetconfDeviceSchemas;
46 import org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc;
47 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil;
48 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
49 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.ModulesState;
50 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.module.list.Module;
51 import org.opendaylight.yangtools.util.xml.UntrustedXML;
52 import org.opendaylight.yangtools.yang.common.QName;
53 import org.opendaylight.yangtools.yang.common.Revision;
54 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
55 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
56 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
57 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
58 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
59 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
60 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
61 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
62 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
63 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
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 static final JSONCodecFactory JSON_CODECS = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
97 .getShared(LIBRARY_CONTEXT);
99 private final Map<QName, URL> availableModels;
101 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
102 YangInstanceIdentifier.builder().node(ModulesState.QNAME).node(Module.QNAME).build();
104 private static final ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC = Builders.containerBuilder()
105 .withNodeIdentifier(NETCONF_GET_NODEID)
106 .withChild(NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT))
109 private LibraryModulesSchemas(final Map<QName, URL> availableModels) {
110 this.availableModels = availableModels;
113 public Map<SourceIdentifier, URL> getAvailableModels() {
114 final Map<SourceIdentifier, URL> result = new HashMap<>();
115 for (final Map.Entry<QName, URL> entry : availableModels.entrySet()) {
116 final SourceIdentifier sId = RevisionSourceIdentifier.create(entry.getKey().getLocalName(),
117 entry.getKey().getRevision());
118 result.put(sId, entry.getValue());
125 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
127 * @param url URL pointing to yang library
128 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
130 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
131 Preconditions.checkNotNull(url);
133 final URL urlConnection = new URL(url);
134 final URLConnection connection = urlConnection.openConnection();
136 if (connection instanceof HttpURLConnection) {
137 connection.setRequestProperty("Accept", "application/xml");
138 final String userpass = username + ":" + password;
139 final String basicAuth = "Basic " + printBase64Binary(userpass.getBytes(StandardCharsets.UTF_8));
141 connection.setRequestProperty("Authorization", basicAuth);
144 return createFromURLConnection(connection);
146 } catch (final IOException e) {
147 LOG.warn("Unable to download yang library from {}", url, e);
148 return new LibraryModulesSchemas(Collections.emptyMap());
153 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
154 final DOMRpcResult moduleListNodeResult;
156 moduleListNodeResult =
157 deviceRpc.invokeRpc(NETCONF_GET_PATH, GET_MODULES_STATE_MODULE_LIST_RPC).get();
158 } catch (final InterruptedException e) {
159 Thread.currentThread().interrupt();
160 throw new RuntimeException(deviceId + ": Interrupted while waiting for response to "
161 + MODULES_STATE_MODULE_LIST, e);
162 } catch (final ExecutionException e) {
163 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
164 MODULES_STATE_MODULE_LIST, e);
165 return new LibraryModulesSchemas(Collections.emptyMap());
168 if (moduleListNodeResult.getErrors().isEmpty() == false) {
169 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
170 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.getErrors());
171 return new LibraryModulesSchemas(Collections.emptyMap());
175 final Optional<? extends NormalizedNode<?, ?>> modulesStateNode =
176 findModulesStateNode(moduleListNodeResult.getResult());
177 if (modulesStateNode.isPresent()) {
178 Preconditions.checkState(modulesStateNode.get() instanceof ContainerNode,
179 "Expecting container containing schemas, but was %s", modulesStateNode.get());
180 return create((ContainerNode) modulesStateNode.get());
183 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, toId(ModulesState.QNAME));
184 return new LibraryModulesSchemas(Collections.emptyMap());
187 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
188 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
189 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
190 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
191 modulesStateNode.getChild(moduleListNodeId);
192 Preconditions.checkState(moduleListNode.isPresent(),
193 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
194 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
195 "Unexpected structure for container: %s in : %s. Expecting a list",
196 moduleListNodeId, modulesStateNode);
198 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
199 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
200 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
201 if (schemaMappingEntry.isPresent()) {
202 schemasMapping.put(createFromEntry(moduleNode).get());
206 return new LibraryModulesSchemas(schemasMapping.build());
210 * Resolves URLs with YANG schema resources from modules-state.
211 * @param url URL pointing to yang library
212 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
214 public static LibraryModulesSchemas create(final String url) {
215 Preconditions.checkNotNull(url);
217 final URL urlConnection = new URL(url);
218 final URLConnection connection = urlConnection.openConnection();
220 if (connection instanceof HttpURLConnection) {
221 connection.setRequestProperty("Accept", "application/xml");
224 return createFromURLConnection(connection);
226 } catch (final IOException e) {
227 LOG.warn("Unable to download yang library from {}", url, e);
228 return new LibraryModulesSchemas(Collections.emptyMap());
232 private static Optional<? extends NormalizedNode<?, ?>> findModulesStateNode(final NormalizedNode<?, ?> result) {
233 if (result == null) {
234 return Optional.empty();
236 final Optional<DataContainerChild<?, ?>> dataNode =
237 ((DataContainerNode<?>) result).getChild(NETCONF_DATA_NODEID);
238 if (dataNode.isPresent() == false) {
239 return Optional.empty();
242 return ((DataContainerNode<?>) dataNode.get()).getChild(toId(ModulesState.QNAME));
245 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
247 String contentType = connection.getContentType();
249 // TODO try to guess Json also from intput stream
250 if (guessJsonFromFileName(connection.getURL().getFile())) {
251 contentType = "application/json";
254 Preconditions.checkNotNull(contentType, "Content type unknown");
255 Preconditions.checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
256 "Only XML and JSON types are supported.");
257 try (InputStream in = connection.getInputStream()) {
258 final Optional<NormalizedNode<?, ?>> optionalModulesStateNode =
259 contentType.equals("application/json") ? readJson(in) : readXml(in);
261 if (!optionalModulesStateNode.isPresent()) {
262 return new LibraryModulesSchemas(Collections.emptyMap());
265 final NormalizedNode<?, ?> modulesStateNode = optionalModulesStateNode.get();
266 Preconditions.checkState(modulesStateNode.getNodeType().equals(ModulesState.QNAME),
267 "Wrong QName %s", modulesStateNode.getNodeType());
268 Preconditions.checkState(modulesStateNode instanceof ContainerNode,
269 "Expecting container containing module list, but was %s", modulesStateNode);
271 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
272 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
273 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
274 ((ContainerNode) modulesStateNode).getChild(moduleListNodeId);
275 Preconditions.checkState(moduleListNode.isPresent(),
276 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
277 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
278 "Unexpected structure for container: %s in : %s. Expecting a list",
279 moduleListNodeId, modulesStateNode);
281 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
282 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
283 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
284 if (schemaMappingEntry.isPresent()) {
285 schemasMapping.put(createFromEntry(moduleNode).get());
289 return new LibraryModulesSchemas(schemasMapping.build());
290 } catch (final IOException e) {
291 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
292 return new LibraryModulesSchemas(Collections.emptyMap());
296 private static boolean guessJsonFromFileName(final String fileName) {
297 String extension = "";
298 final int i = fileName.lastIndexOf(46);
300 extension = fileName.substring(i).toLowerCase(Locale.ROOT);
303 return extension.equals(".json");
306 private static Optional<NormalizedNode<?, ?>> readJson(final InputStream in) {
307 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
308 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
310 final JsonParserStream jsonParser = JsonParserStream.create(writer, JSON_CODECS);
311 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
313 jsonParser.parse(reader);
315 return resultHolder.isFinished() ? Optional.of(resultHolder.getResult()) : Optional.empty();
318 private static Optional<NormalizedNode<?, ?>> readXml(final InputStream in) {
320 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
322 final Document read = docBuilder.parse(in);
323 final Document doc = docBuilder.newDocument();
324 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
326 doc.appendChild(rootElement);
328 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
329 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
330 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
331 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
332 rootElement.appendChild(module);
334 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
335 read.getElementsByTagName("module").item(i).getTextContent());
339 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
340 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
341 final XmlParserStream xmlParser = XmlParserStream.create(writer, LIBRARY_CONTEXT,
342 LIBRARY_CONTEXT.getDataChildByName(ModulesState.QNAME));
343 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
344 final NormalizedNode<?, ?> parsed = resultHolder.getResult();
345 return Optional.of(parsed);
346 } catch (XMLStreamException | URISyntaxException | IOException | SAXException e) {
347 LOG.warn("Unable to parse yang library xml content", e);
350 return Optional.empty();
353 private static Optional<Map.Entry<QName, URL>> createFromEntry(final MapEntryNode moduleNode) {
354 Preconditions.checkArgument(
355 moduleNode.getNodeType().equals(Module.QNAME), "Wrong QName %s", moduleNode.getNodeType());
357 YangInstanceIdentifier.NodeIdentifier childNodeId =
358 new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "name"));
359 final String moduleName = getSingleChildNodeValue(moduleNode, childNodeId).get();
361 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "revision"));
362 final Optional<String> revision = getSingleChildNodeValue(moduleNode, childNodeId);
363 if (revision.isPresent()) {
364 if (!Revision.STRING_FORMAT_PATTERN.matcher(revision.get()).matches()) {
365 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
366 return Optional.empty();
370 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
371 // don't fail if schema node is not present, just skip the entry or add some default URL
372 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "schema"));
373 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, childNodeId);
375 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "namespace"));
376 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, childNodeId).get();
378 final QName moduleQName = revision.isPresent()
379 ? QName.create(moduleNameSpace, revision.get(), moduleName)
380 : QName.create(URI.create(moduleNameSpace), moduleName);
383 return Optional.of(new AbstractMap.SimpleImmutableEntry<>(
384 moduleQName, new URL(schemaUriAsString.get())));
385 } catch (final MalformedURLException e) {
386 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
387 moduleNode, schemaUriAsString.get());
388 return Optional.empty();
392 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode,
393 final YangInstanceIdentifier.NodeIdentifier childNodeId) {
394 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> node =
395 schemaNode.getChild(childNodeId);
396 Preconditions.checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
397 return getValueOfSimpleNode(node.get());
400 private static Optional<String> getValueOfSimpleNode(
401 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> node) {
402 final String valueStr = node.getValue().toString();
403 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
407 public Set<QName> getAvailableYangSchemasQNames() {