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_QNAME;
12 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_QNAME;
13 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toId;
14 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toPath;
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.common.collect.Maps;
20 import com.google.gson.stream.JsonReader;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.io.InputStreamReader;
24 import java.net.HttpURLConnection;
25 import java.net.MalformedURLException;
27 import java.net.URISyntaxException;
29 import java.net.URLConnection;
30 import java.nio.charset.Charset;
31 import java.nio.charset.StandardCharsets;
32 import java.util.AbstractMap;
33 import java.util.Collections;
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.controller.md.sal.dom.api.DOMRpcResult;
45 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
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;
103 final DataContainerChild<?, ?> filter =
104 NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT);
105 GET_MODULES_STATE_MODULE_LIST_RPC =
106 Builders.containerBuilder().withNodeIdentifier(toId(NETCONF_GET_QNAME)).withChild(filter).build();
109 private LibraryModulesSchemas(final Map<QName, URL> availableModels) {
110 this.availableModels = availableModels;
113 public Map<SourceIdentifier, URL> getAvailableModels() {
114 final Map<SourceIdentifier, URL> result = Maps.newHashMap();
115 for (final Map.Entry<QName, URL> entry : availableModels.entrySet()) {
116 final SourceIdentifier sId = RevisionSourceIdentifier
117 .create(entry.getKey().getLocalName(), entry.getKey().getRevision());
118 result.put(sId, entry.getValue());
126 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
128 * @param url URL pointing to yang library
129 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
131 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
132 Preconditions.checkNotNull(url);
134 final URL urlConnection = new URL(url);
135 final URLConnection connection = urlConnection.openConnection();
137 if (connection instanceof HttpURLConnection) {
138 connection.setRequestProperty("Accept", "application/xml");
139 final String userpass = username + ":" + password;
140 final String basicAuth = "Basic " + printBase64Binary(userpass.getBytes(StandardCharsets.UTF_8));
142 connection.setRequestProperty("Authorization", basicAuth);
145 return createFromURLConnection(connection);
147 } catch (final IOException e) {
148 LOG.warn("Unable to download yang library from {}", url, e);
149 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
154 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
155 final DOMRpcResult moduleListNodeResult;
157 moduleListNodeResult =
158 deviceRpc.invokeRpc(toPath(NETCONF_GET_QNAME), GET_MODULES_STATE_MODULE_LIST_RPC).get();
159 } catch (final InterruptedException e) {
160 Thread.currentThread().interrupt();
161 throw new RuntimeException(deviceId + ": Interrupted while waiting for response to "
162 + MODULES_STATE_MODULE_LIST, e);
163 } catch (final ExecutionException e) {
164 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
165 MODULES_STATE_MODULE_LIST, e);
166 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
169 if (moduleListNodeResult.getErrors().isEmpty() == false) {
170 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
171 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.getErrors());
172 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
176 final Optional<? extends NormalizedNode<?, ?>> modulesStateNode =
177 findModulesStateNode(moduleListNodeResult.getResult());
178 if (modulesStateNode.isPresent()) {
179 Preconditions.checkState(modulesStateNode.get() instanceof ContainerNode,
180 "Expecting container containing schemas, but was %s", modulesStateNode.get());
181 return create((ContainerNode) modulesStateNode.get());
184 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, toId(ModulesState.QNAME));
185 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
188 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
189 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
190 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
191 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
192 modulesStateNode.getChild(moduleListNodeId);
193 Preconditions.checkState(moduleListNode.isPresent(),
194 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
195 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
196 "Unexpected structure for container: %s in : %s. Expecting a list",
197 moduleListNodeId, modulesStateNode);
199 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
200 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
201 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
202 if (schemaMappingEntry.isPresent()) {
203 schemasMapping.put(createFromEntry(moduleNode).get());
207 return new LibraryModulesSchemas(schemasMapping.build());
211 * Resolves URLs with YANG schema resources from modules-state.
212 * @param url URL pointing to yang library
213 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
215 public static LibraryModulesSchemas create(final String url) {
216 Preconditions.checkNotNull(url);
218 final URL urlConnection = new URL(url);
219 final URLConnection connection = urlConnection.openConnection();
221 if (connection instanceof HttpURLConnection) {
222 connection.setRequestProperty("Accept", "application/xml");
225 return createFromURLConnection(connection);
227 } catch (final IOException e) {
228 LOG.warn("Unable to download yang library from {}", url, e);
229 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
233 private static Optional<? extends NormalizedNode<?, ?>> findModulesStateNode(final NormalizedNode<?, ?> result) {
234 if (result == null) {
235 return Optional.empty();
237 final Optional<DataContainerChild<?, ?>> dataNode =
238 ((DataContainerNode<?>) result).getChild(toId(NETCONF_DATA_QNAME));
239 if (dataNode.isPresent() == false) {
240 return Optional.empty();
243 return ((DataContainerNode<?>) dataNode.get()).getChild(toId(ModulesState.QNAME));
246 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
248 String contentType = connection.getContentType();
250 // TODO try to guess Json also from intput stream
251 if (guessJsonFromFileName(connection.getURL().getFile())) {
252 contentType = "application/json";
255 Preconditions.checkNotNull(contentType, "Content type unknown");
256 Preconditions.checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
257 "Only XML and JSON types are supported.");
258 try (InputStream in = connection.getInputStream()) {
259 final Optional<NormalizedNode<?, ?>> optionalModulesStateNode =
260 contentType.equals("application/json") ? readJson(in) : readXml(in);
262 if (!optionalModulesStateNode.isPresent()) {
263 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
266 final NormalizedNode<?, ?> modulesStateNode = optionalModulesStateNode.get();
267 Preconditions.checkState(modulesStateNode.getNodeType().equals(ModulesState.QNAME),
268 "Wrong QName %s", modulesStateNode.getNodeType());
269 Preconditions.checkState(modulesStateNode instanceof ContainerNode,
270 "Expecting container containing module list, but was %s", modulesStateNode);
272 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
273 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
274 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
275 ((ContainerNode) modulesStateNode).getChild(moduleListNodeId);
276 Preconditions.checkState(moduleListNode.isPresent(),
277 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
278 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
279 "Unexpected structure for container: %s in : %s. Expecting a list",
280 moduleListNodeId, modulesStateNode);
282 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
283 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
284 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
285 if (schemaMappingEntry.isPresent()) {
286 schemasMapping.put(createFromEntry(moduleNode).get());
290 return new LibraryModulesSchemas(schemasMapping.build());
291 } catch (final IOException e) {
292 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
293 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
297 private static boolean guessJsonFromFileName(final String fileName) {
298 String extension = "";
299 final int i = fileName.lastIndexOf(46);
301 extension = fileName.substring(i).toLowerCase(Locale.ROOT);
304 return extension.equals(".json");
307 private static Optional<NormalizedNode<?, ?>> readJson(final InputStream in) {
308 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
309 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
311 final JsonParserStream jsonParser = JsonParserStream.create(writer, LIBRARY_CONTEXT);
312 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
314 jsonParser.parse(reader);
316 return resultHolder.isFinished() ? Optional.of(resultHolder.getResult()) : Optional.empty();
319 private static Optional<NormalizedNode<?, ?>> readXml(final InputStream in) {
321 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
323 final Document read = docBuilder.parse(in);
324 final Document doc = docBuilder.newDocument();
325 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
327 doc.appendChild(rootElement);
329 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
330 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
331 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
332 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
333 rootElement.appendChild(module);
335 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
336 read.getElementsByTagName("module").item(i).getTextContent());
340 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
341 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
342 final XmlParserStream xmlParser = XmlParserStream.create(writer, LIBRARY_CONTEXT,
343 LIBRARY_CONTEXT.getDataChildByName(ModulesState.QNAME));
344 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
345 final NormalizedNode<?, ?> parsed = resultHolder.getResult();
346 return Optional.of(parsed);
347 } catch (XMLStreamException | URISyntaxException | IOException | ParserConfigurationException
349 LOG.warn("Unable to parse yang library xml content", e);
352 return Optional.empty();
355 private static Optional<Map.Entry<QName, URL>> createFromEntry(final MapEntryNode moduleNode) {
356 Preconditions.checkArgument(
357 moduleNode.getNodeType().equals(Module.QNAME), "Wrong QName %s", moduleNode.getNodeType());
359 YangInstanceIdentifier.NodeIdentifier childNodeId =
360 new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "name"));
361 final String moduleName = getSingleChildNodeValue(moduleNode, childNodeId).get();
363 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "revision"));
364 final Optional<String> revision = getSingleChildNodeValue(moduleNode, childNodeId);
365 if (revision.isPresent()) {
366 if (!Revision.STRING_FORMAT_PATTERN.matcher(revision.get()).matches()) {
367 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
368 return Optional.empty();
372 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
373 // don't fail if schema node is not present, just skip the entry or add some default URL
374 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "schema"));
375 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, childNodeId);
377 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "namespace"));
378 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, childNodeId).get();
380 final QName moduleQName = revision.isPresent()
381 ? QName.create(moduleNameSpace, revision.get(), moduleName)
382 : QName.create(URI.create(moduleNameSpace), moduleName);
385 return Optional.<Map.Entry<QName, URL>>of(new AbstractMap.SimpleImmutableEntry<>(
386 moduleQName, new URL(schemaUriAsString.get())));
387 } catch (final MalformedURLException e) {
388 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
389 moduleNode, schemaUriAsString.get());
390 return Optional.empty();
394 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode,
395 final YangInstanceIdentifier.NodeIdentifier childNodeId) {
396 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> node =
397 schemaNode.getChild(childNodeId);
398 Preconditions.checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
399 return getValueOfSimpleNode(node.get());
402 private static Optional<String> getValueOfSimpleNode(
403 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> node) {
404 final String valueStr = node.getValue().toString();
405 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
409 public Set<QName> getAvailableYangSchemasQNames() {