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.client.mdsal;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Preconditions.checkState;
12 import static java.util.Objects.requireNonNull;
13 import static org.opendaylight.netconf.client.mdsal.impl.NetconfMessageTransformUtil.NETCONF_DATA_NODEID;
14 import static org.opendaylight.netconf.client.mdsal.impl.NetconfMessageTransformUtil.NETCONF_GET_NODEID;
16 import com.google.common.base.Strings;
17 import com.google.common.collect.ImmutableMap;
18 import com.google.gson.stream.JsonReader;
19 import java.io.IOException;
20 import java.io.InputStream;
21 import java.io.InputStreamReader;
22 import java.net.HttpURLConnection;
23 import java.net.MalformedURLException;
25 import java.net.URLConnection;
26 import java.nio.charset.Charset;
27 import java.nio.charset.StandardCharsets;
28 import java.util.Base64;
29 import java.util.Collection;
30 import java.util.HashMap;
32 import java.util.Map.Entry;
33 import java.util.Optional;
35 import java.util.concurrent.ExecutionException;
36 import java.util.regex.Pattern;
37 import javax.xml.parsers.DocumentBuilder;
38 import javax.xml.stream.XMLStreamException;
39 import javax.xml.transform.dom.DOMSource;
40 import org.eclipse.jdt.annotation.NonNull;
41 import org.eclipse.jdt.annotation.Nullable;
42 import org.opendaylight.mdsal.binding.runtime.spi.BindingRuntimeHelpers;
43 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
44 import org.opendaylight.netconf.client.mdsal.api.NetconfDeviceSchemas;
45 import org.opendaylight.netconf.client.mdsal.api.RemoteDeviceId;
46 import org.opendaylight.netconf.client.mdsal.impl.NetconfMessageTransformUtil;
47 import org.opendaylight.netconf.client.mdsal.spi.NetconfDeviceRpc;
48 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.Get;
49 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesState;
50 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.YangLibrary;
51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.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.common.XMLNamespace;
56 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
57 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
58 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
59 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
60 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
61 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
62 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
63 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
64 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizationResult;
65 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
66 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
67 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
68 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
69 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
70 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
71 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
72 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizationResultHolder;
73 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
74 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
75 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
76 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
77 import org.slf4j.Logger;
78 import org.slf4j.LoggerFactory;
79 import org.w3c.dom.Document;
80 import org.w3c.dom.Element;
81 import org.w3c.dom.Node;
82 import org.xml.sax.SAXException;
85 * Holds URLs with YANG schema resources for all yang modules reported in
86 * ietf-netconf-yang-library/modules-state/modules node.
88 public final class LibraryModulesSchemas implements NetconfDeviceSchemas {
90 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
91 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
92 private static final EffectiveModelContext LIBRARY_CONTEXT = BindingRuntimeHelpers.createEffectiveModel(
94 private static final Inference MODULES_STATE_INFERENCE =
95 SchemaInferenceStack.ofDataTreePath(LIBRARY_CONTEXT, ModulesState.QNAME).toInference();
97 // FIXME: this is legacy RFC7895, add support for RFC8525 containers, too
98 private static final NodeIdentifier MODULES_STATE_NID = NodeIdentifier.create(ModulesState.QNAME);
99 private static final NodeIdentifier MODULE_NID = NodeIdentifier.create(Module.QNAME);
100 private static final NodeIdentifier NAME_NID = NodeIdentifier.create(QName.create(Module.QNAME, "name").intern());
101 private static final NodeIdentifier REVISION_NID = NodeIdentifier.create(
102 QName.create(Module.QNAME, "revision").intern());
103 private static final NodeIdentifier SCHEMA_NID = NodeIdentifier.create(
104 QName.create(Module.QNAME, "schema").intern());
105 private static final NodeIdentifier NAMESPACE_NID = NodeIdentifier.create(
106 QName.create(Module.QNAME, "namespace").intern());
108 private static final JSONCodecFactory JSON_CODECS = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
109 .getShared(LIBRARY_CONTEXT);
111 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
112 YangInstanceIdentifier.of(MODULES_STATE_NID, MODULE_NID);
114 private static final @NonNull ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC = Builders.containerBuilder()
115 .withNodeIdentifier(NETCONF_GET_NODEID)
116 .withChild(NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT))
119 private final ImmutableMap<QName, URL> availableModels;
121 private LibraryModulesSchemas(final ImmutableMap<QName, URL> availableModels) {
122 this.availableModels = requireNonNull(availableModels);
125 public Map<SourceIdentifier, URL> getAvailableModels() {
126 final Map<SourceIdentifier, URL> result = new HashMap<>();
127 for (final Entry<QName, URL> entry : availableModels.entrySet()) {
128 final SourceIdentifier sId = new SourceIdentifier(entry.getKey().getLocalName(),
129 entry.getKey().getRevision().map(Revision::toString).orElse(null));
130 result.put(sId, entry.getValue());
137 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
139 * @param url URL pointing to yang library
140 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
142 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
144 final URL urlConnection = new URL(requireNonNull(url));
145 final URLConnection connection = urlConnection.openConnection();
147 if (connection instanceof HttpURLConnection) {
148 connection.setRequestProperty("Accept", "application/xml");
149 final String userpass = username + ":" + password;
150 connection.setRequestProperty("Authorization",
151 "Basic " + Base64.getEncoder().encodeToString(userpass.getBytes(StandardCharsets.UTF_8)));
154 return createFromURLConnection(connection);
156 } catch (final IOException e) {
157 LOG.warn("Unable to download yang library from {}", url, e);
158 return new LibraryModulesSchemas(ImmutableMap.of());
163 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
164 final DOMRpcResult moduleListNodeResult;
166 moduleListNodeResult = deviceRpc.invokeRpc(Get.QNAME, GET_MODULES_STATE_MODULE_LIST_RPC).get();
167 } catch (final InterruptedException e) {
168 Thread.currentThread().interrupt();
169 throw new IllegalStateException(deviceId + ": Interrupted while waiting for response to "
170 + MODULES_STATE_MODULE_LIST, e);
171 } catch (final ExecutionException e) {
172 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
173 MODULES_STATE_MODULE_LIST, e);
174 return new LibraryModulesSchemas(ImmutableMap.of());
177 if (!moduleListNodeResult.errors().isEmpty()) {
178 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
179 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.errors());
180 return new LibraryModulesSchemas(ImmutableMap.of());
183 final Optional<DataContainerChild> modulesStateNode =
184 findModulesStateNode(moduleListNodeResult.value());
185 if (modulesStateNode.isPresent()) {
186 final DataContainerChild node = modulesStateNode.orElseThrow();
187 checkState(node instanceof ContainerNode, "Expecting container containing schemas, but was %s", node);
188 return create((ContainerNode) node);
191 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, MODULES_STATE_NID);
192 return new LibraryModulesSchemas(ImmutableMap.of());
195 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
196 final Optional<DataContainerChild> moduleListNode = modulesStateNode.findChildByArg(MODULE_NID);
197 checkState(moduleListNode.isPresent(), "Unable to find list: %s in %s", MODULE_NID, modulesStateNode);
198 final DataContainerChild node = moduleListNode.orElseThrow();
199 checkState(node instanceof MapNode, "Unexpected structure for container: %s in : %s. Expecting a list",
200 MODULE_NID, modulesStateNode);
202 final MapNode moduleList = (MapNode) node;
203 final Collection<MapEntryNode> modules = moduleList.body();
204 final ImmutableMap.Builder<QName, URL> schemasMapping = ImmutableMap.builderWithExpectedSize(modules.size());
205 for (final MapEntryNode moduleNode : modules) {
206 final Entry<QName, URL> entry = createFromEntry(moduleNode);
208 schemasMapping.put(entry);
212 return new LibraryModulesSchemas(schemasMapping.build());
216 * Resolves URLs with YANG schema resources from modules-state.
217 * @param url URL pointing to yang library
218 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
220 public static LibraryModulesSchemas create(final String url) {
221 final URLConnection connection;
223 connection = new URL(requireNonNull(url)).openConnection();
224 } catch (final IOException e) {
225 LOG.warn("Unable to download yang library from {}", url, e);
226 return new LibraryModulesSchemas(ImmutableMap.of());
229 if (connection instanceof HttpURLConnection) {
230 connection.setRequestProperty("Accept", "application/xml");
232 return createFromURLConnection(connection);
235 private static Optional<DataContainerChild> findModulesStateNode(final NormalizedNode result) {
236 if (result == null) {
237 return Optional.empty();
239 final Optional<DataContainerChild> dataNode = ((DataContainerNode) result).findChildByArg(NETCONF_DATA_NODEID);
240 if (dataNode.isEmpty()) {
241 return Optional.empty();
244 return ((DataContainerNode) dataNode.orElseThrow()).findChildByArg(MODULES_STATE_NID);
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 requireNonNull(contentType, "Content type unknown");
257 checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
258 "Only XML and JSON types are supported.");
260 Optional<NormalizedNode> optionalModulesStateNode = Optional.empty();
261 try (InputStream in = connection.getInputStream()) {
262 optionalModulesStateNode = contentType.equals("application/json") ? readJson(in) : readXml(in);
263 } catch (final IOException e) {
264 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
267 if (optionalModulesStateNode.isEmpty()) {
268 return new LibraryModulesSchemas(ImmutableMap.of());
271 final NormalizedNode modulesStateNode = optionalModulesStateNode.orElseThrow();
272 checkState(modulesStateNode instanceof ContainerNode, "Expecting container containing module list, but was %s",
274 final ContainerNode modulesState = (ContainerNode) modulesStateNode;
275 final NodeIdentifier nodeName = modulesState.name();
276 checkState(MODULES_STATE_NID.equals(nodeName), "Wrong container identifier %s", nodeName);
278 return create((ContainerNode) modulesStateNode);
281 private static boolean guessJsonFromFileName(final String fileName) {
282 final int i = fileName.lastIndexOf('.');
283 return i != 1 && ".json".equalsIgnoreCase(fileName.substring(i));
286 private static Optional<NormalizedNode> readJson(final InputStream in) {
287 final NormalizationResultHolder resultHolder = new NormalizationResultHolder();
288 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
290 final JsonParserStream jsonParser = JsonParserStream.create(writer, JSON_CODECS);
291 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
293 jsonParser.parse(reader);
295 final NormalizationResult result = resultHolder.result();
296 return result == null ? Optional.empty() : Optional.of(result.data());
299 private static Optional<NormalizedNode> readXml(final InputStream in) {
301 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
303 final Document read = docBuilder.parse(in);
304 final Document doc = docBuilder.newDocument();
305 final Element rootElement = doc.createElementNS(ModulesState.QNAME.getNamespace().toString(),
306 ModulesState.QNAME.getLocalName());
307 doc.appendChild(rootElement);
309 // FIXME: also namespace?!
310 final var revisions = read.getElementsByTagName("revision");
312 for (int i = 0, length = revisions.getLength(); i < length; i++) {
313 final String revision = revisions.item(i).getTextContent();
314 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
315 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
316 rootElement.appendChild(module);
318 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
319 read.getElementsByTagName("module").item(i).getTextContent());
323 final NormalizationResultHolder resultHolder = new NormalizationResultHolder();
324 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
325 final XmlParserStream xmlParser = XmlParserStream.create(writer, MODULES_STATE_INFERENCE);
326 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
327 return Optional.of(resultHolder.getResult().data());
328 } catch (XMLStreamException | IOException | SAXException e) {
329 LOG.warn("Unable to parse yang library xml content", e);
332 return Optional.empty();
335 private static @Nullable Entry<QName, URL> createFromEntry(final MapEntryNode moduleNode) {
336 final QName moduleNodeId = moduleNode.name().getNodeType();
337 checkArgument(moduleNodeId.equals(Module.QNAME), "Wrong QName %s", moduleNodeId);
339 final String moduleName = getSingleChildNodeValue(moduleNode, NAME_NID).orElseThrow();
340 final Optional<String> revision = getSingleChildNodeValue(moduleNode, REVISION_NID);
341 if (revision.isPresent()) {
342 final var rev = revision.orElseThrow();
343 if (!Revision.STRING_FORMAT_PATTERN.matcher(rev).matches()) {
344 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, rev);
349 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
350 // don't fail if schema node is not present, just skip the entry or add some default URL
351 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, SCHEMA_NID);
352 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, NAMESPACE_NID).orElseThrow();
354 final QName moduleQName = revision.isPresent()
355 ? QName.create(moduleNameSpace, revision.orElseThrow(), moduleName)
356 : QName.create(XMLNamespace.of(moduleNameSpace), moduleName);
359 return Map.entry(moduleQName, new URL(schemaUriAsString.orElseThrow()));
360 } catch (final MalformedURLException e) {
361 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
362 moduleNode, schemaUriAsString.orElseThrow());
367 private static Optional<String> getSingleChildNodeValue(final DataContainerNode schemaNode,
368 final NodeIdentifier childNodeId) {
369 final Optional<DataContainerChild> node = schemaNode.findChildByArg(childNodeId);
370 checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
371 return getValueOfSimpleNode(node.orElseThrow());
374 private static Optional<String> getValueOfSimpleNode(final NormalizedNode node) {
375 final String valueStr = node.body().toString();
376 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
380 public Set<QName> getAvailableYangSchemasQNames() {