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 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.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_DATA_NODEID;
14 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_NODEID;
15 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_QNAME;
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;
25 import java.net.URISyntaxException;
27 import java.net.URLConnection;
28 import java.nio.charset.Charset;
29 import java.nio.charset.StandardCharsets;
30 import java.util.AbstractMap.SimpleImmutableEntry;
31 import java.util.Base64;
32 import java.util.Collection;
33 import java.util.HashMap;
35 import java.util.Map.Entry;
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.eclipse.jdt.annotation.NonNull;
44 import org.eclipse.jdt.annotation.Nullable;
45 import org.opendaylight.mdsal.binding.runtime.spi.BindingRuntimeHelpers;
46 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
47 import org.opendaylight.netconf.sal.connect.api.NetconfDeviceSchemas;
48 import org.opendaylight.netconf.sal.connect.api.RemoteDeviceId;
49 import org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc;
50 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil;
51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesState;
52 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.YangLibrary;
53 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.Module;
54 import org.opendaylight.yangtools.util.xml.UntrustedXML;
55 import org.opendaylight.yangtools.yang.common.QName;
56 import org.opendaylight.yangtools.yang.common.Revision;
57 import org.opendaylight.yangtools.yang.common.XMLNamespace;
58 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
59 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
60 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
61 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
62 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
63 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
64 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
65 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
66 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
67 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
68 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
69 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
70 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
71 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
72 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
73 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
74 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
75 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
76 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
77 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
78 import org.slf4j.Logger;
79 import org.slf4j.LoggerFactory;
80 import org.w3c.dom.Document;
81 import org.w3c.dom.Element;
82 import org.w3c.dom.Node;
83 import org.xml.sax.SAXException;
86 * Holds URLs with YANG schema resources for all yang modules reported in
87 * ietf-netconf-yang-library/modules-state/modules node.
89 public final class LibraryModulesSchemas implements NetconfDeviceSchemas {
91 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
92 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
93 private static final EffectiveModelContext LIBRARY_CONTEXT = BindingRuntimeHelpers.createEffectiveModel(
95 private static final Inference MODULES_STATE_INFERENCE =
96 SchemaInferenceStack.ofDataTreePath(LIBRARY_CONTEXT, ModulesState.QNAME).toInference();
98 // FIXME: this is legacy RFC7895, add support for RFC8525 containers, too
99 private static final NodeIdentifier MODULES_STATE_NID = NodeIdentifier.create(ModulesState.QNAME);
100 private static final NodeIdentifier MODULE_NID = NodeIdentifier.create(Module.QNAME);
101 private static final NodeIdentifier NAME_NID = NodeIdentifier.create(QName.create(Module.QNAME, "name").intern());
102 private static final NodeIdentifier REVISION_NID = NodeIdentifier.create(
103 QName.create(Module.QNAME, "revision").intern());
104 private static final NodeIdentifier SCHEMA_NID = NodeIdentifier.create(
105 QName.create(Module.QNAME, "schema").intern());
106 private static final NodeIdentifier NAMESPACE_NID = NodeIdentifier.create(
107 QName.create(Module.QNAME, "namespace").intern());
109 private static final JSONCodecFactory JSON_CODECS = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
110 .getShared(LIBRARY_CONTEXT);
112 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
113 YangInstanceIdentifier.create(MODULES_STATE_NID, MODULE_NID);
115 private static final @NonNull ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC = Builders.containerBuilder()
116 .withNodeIdentifier(NETCONF_GET_NODEID)
117 .withChild(NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT))
120 private final ImmutableMap<QName, URL> availableModels;
122 private LibraryModulesSchemas(final ImmutableMap<QName, URL> availableModels) {
123 this.availableModels = requireNonNull(availableModels);
126 public Map<SourceIdentifier, URL> getAvailableModels() {
127 final Map<SourceIdentifier, URL> result = new HashMap<>();
128 for (final Entry<QName, URL> entry : availableModels.entrySet()) {
129 final SourceIdentifier sId = new SourceIdentifier(entry.getKey().getLocalName(),
130 entry.getKey().getRevision().map(Revision::toString).orElse(null));
131 result.put(sId, entry.getValue());
138 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
140 * @param url URL pointing to yang library
141 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
143 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
145 final URL urlConnection = new URL(requireNonNull(url));
146 final URLConnection connection = urlConnection.openConnection();
148 if (connection instanceof HttpURLConnection) {
149 connection.setRequestProperty("Accept", "application/xml");
150 final String userpass = username + ":" + password;
151 connection.setRequestProperty("Authorization",
152 "Basic " + Base64.getEncoder().encodeToString(userpass.getBytes(StandardCharsets.UTF_8)));
155 return createFromURLConnection(connection);
157 } catch (final IOException e) {
158 LOG.warn("Unable to download yang library from {}", url, e);
159 return new LibraryModulesSchemas(ImmutableMap.of());
164 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
165 final DOMRpcResult moduleListNodeResult;
167 moduleListNodeResult =
168 deviceRpc.invokeRpc(NETCONF_GET_QNAME, GET_MODULES_STATE_MODULE_LIST_RPC).get();
169 } catch (final InterruptedException e) {
170 Thread.currentThread().interrupt();
171 throw new IllegalStateException(deviceId + ": Interrupted while waiting for response to "
172 + MODULES_STATE_MODULE_LIST, e);
173 } catch (final ExecutionException e) {
174 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
175 MODULES_STATE_MODULE_LIST, e);
176 return new LibraryModulesSchemas(ImmutableMap.of());
179 if (!moduleListNodeResult.errors().isEmpty()) {
180 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
181 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.errors());
182 return new LibraryModulesSchemas(ImmutableMap.of());
185 final Optional<DataContainerChild> modulesStateNode =
186 findModulesStateNode(moduleListNodeResult.value());
187 if (modulesStateNode.isPresent()) {
188 final DataContainerChild node = modulesStateNode.get();
189 checkState(node instanceof ContainerNode, "Expecting container containing schemas, but was %s", node);
190 return create((ContainerNode) node);
193 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, MODULES_STATE_NID);
194 return new LibraryModulesSchemas(ImmutableMap.of());
197 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
198 final Optional<DataContainerChild> moduleListNode = modulesStateNode.findChildByArg(MODULE_NID);
199 checkState(moduleListNode.isPresent(), "Unable to find list: %s in %s", MODULE_NID, modulesStateNode);
200 final DataContainerChild node = moduleListNode.get();
201 checkState(node instanceof MapNode, "Unexpected structure for container: %s in : %s. Expecting a list",
202 MODULE_NID, modulesStateNode);
204 final MapNode moduleList = (MapNode) node;
205 final Collection<MapEntryNode> modules = moduleList.body();
206 final ImmutableMap.Builder<QName, URL> schemasMapping = ImmutableMap.builderWithExpectedSize(modules.size());
207 for (final MapEntryNode moduleNode : modules) {
208 final Entry<QName, URL> entry = createFromEntry(moduleNode);
210 schemasMapping.put(entry);
214 return new LibraryModulesSchemas(schemasMapping.build());
218 * Resolves URLs with YANG schema resources from modules-state.
219 * @param url URL pointing to yang library
220 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
222 public static LibraryModulesSchemas create(final String url) {
223 final URLConnection connection;
225 connection = new URL(requireNonNull(url)).openConnection();
226 } catch (final IOException e) {
227 LOG.warn("Unable to download yang library from {}", url, e);
228 return new LibraryModulesSchemas(ImmutableMap.of());
231 if (connection instanceof HttpURLConnection) {
232 connection.setRequestProperty("Accept", "application/xml");
234 return createFromURLConnection(connection);
237 private static Optional<DataContainerChild> findModulesStateNode(final NormalizedNode result) {
238 if (result == null) {
239 return Optional.empty();
241 final Optional<DataContainerChild> dataNode = ((DataContainerNode) result).findChildByArg(NETCONF_DATA_NODEID);
242 if (dataNode.isEmpty()) {
243 return Optional.empty();
246 return ((DataContainerNode) dataNode.get()).findChildByArg(MODULES_STATE_NID);
249 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
251 String contentType = connection.getContentType();
253 // TODO try to guess Json also from intput stream
254 if (guessJsonFromFileName(connection.getURL().getFile())) {
255 contentType = "application/json";
258 requireNonNull(contentType, "Content type unknown");
259 checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
260 "Only XML and JSON types are supported.");
262 Optional<NormalizedNode> optionalModulesStateNode = Optional.empty();
263 try (InputStream in = connection.getInputStream()) {
264 optionalModulesStateNode = contentType.equals("application/json") ? readJson(in) : readXml(in);
265 } catch (final IOException e) {
266 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
269 if (optionalModulesStateNode.isEmpty()) {
270 return new LibraryModulesSchemas(ImmutableMap.of());
273 final NormalizedNode modulesStateNode = optionalModulesStateNode.get();
274 checkState(modulesStateNode instanceof ContainerNode, "Expecting container containing module list, but was %s",
276 final ContainerNode modulesState = (ContainerNode) modulesStateNode;
277 final NodeIdentifier nodeName = modulesState.getIdentifier();
278 checkState(MODULES_STATE_NID.equals(nodeName), "Wrong container identifier %s", nodeName);
280 return create((ContainerNode) modulesStateNode);
283 private static boolean guessJsonFromFileName(final String fileName) {
284 final int i = fileName.lastIndexOf('.');
285 return i != 1 && ".json".equalsIgnoreCase(fileName.substring(i));
288 private static Optional<NormalizedNode> readJson(final InputStream in) {
289 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
290 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
292 final JsonParserStream jsonParser = JsonParserStream.create(writer, JSON_CODECS);
293 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
295 jsonParser.parse(reader);
297 return resultHolder.isFinished() ? Optional.of(resultHolder.getResult()) : Optional.empty();
300 private static Optional<NormalizedNode> readXml(final InputStream in) {
302 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
304 final Document read = docBuilder.parse(in);
305 final Document doc = docBuilder.newDocument();
306 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
308 doc.appendChild(rootElement);
310 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
311 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
312 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
313 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
314 rootElement.appendChild(module);
316 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
317 read.getElementsByTagName("module").item(i).getTextContent());
321 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
322 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
323 final XmlParserStream xmlParser = XmlParserStream.create(writer, MODULES_STATE_INFERENCE);
324 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
325 return Optional.of(resultHolder.getResult());
326 } catch (XMLStreamException | URISyntaxException | IOException | SAXException e) {
327 LOG.warn("Unable to parse yang library xml content", e);
330 return Optional.empty();
333 private static @Nullable Entry<QName, URL> createFromEntry(final MapEntryNode moduleNode) {
334 final QName moduleNodeId = moduleNode.getIdentifier().getNodeType();
335 checkArgument(moduleNodeId.equals(Module.QNAME), "Wrong QName %s", moduleNodeId);
337 final String moduleName = getSingleChildNodeValue(moduleNode, NAME_NID).get();
338 final Optional<String> revision = getSingleChildNodeValue(moduleNode, REVISION_NID);
339 if (revision.isPresent()) {
340 if (!Revision.STRING_FORMAT_PATTERN.matcher(revision.get()).matches()) {
341 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
346 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
347 // don't fail if schema node is not present, just skip the entry or add some default URL
348 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, SCHEMA_NID);
349 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, NAMESPACE_NID).get();
351 final QName moduleQName = revision.isPresent()
352 ? QName.create(moduleNameSpace, revision.get(), moduleName)
353 : QName.create(XMLNamespace.of(moduleNameSpace), moduleName);
356 return new SimpleImmutableEntry<>(moduleQName, new URL(schemaUriAsString.get()));
357 } catch (final MalformedURLException e) {
358 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
359 moduleNode, schemaUriAsString.get());
364 private static Optional<String> getSingleChildNodeValue(final DataContainerNode schemaNode,
365 final NodeIdentifier childNodeId) {
366 final Optional<DataContainerChild> node = schemaNode.findChildByArg(childNodeId);
367 checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
368 return getValueOfSimpleNode(node.get());
371 private static Optional<String> getValueOfSimpleNode(final NormalizedNode node) {
372 final String valueStr = node.body().toString();
373 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
377 public Set<QName> getAvailableYangSchemasQNames() {