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;
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.SimpleImmutableEntry;
32 import java.util.Base64;
33 import java.util.Collection;
34 import java.util.HashMap;
36 import java.util.Map.Entry;
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.stream.XMLStreamException;
43 import javax.xml.transform.dom.DOMSource;
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.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.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.data.api.YangInstanceIdentifier;
58 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
59 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
60 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
61 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
62 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
63 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
64 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
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.NormalizedNodeResult;
73 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
74 import org.opendaylight.yangtools.yang.model.repo.api.RevisionSourceIdentifier;
75 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
76 import org.slf4j.Logger;
77 import org.slf4j.LoggerFactory;
78 import org.w3c.dom.Document;
79 import org.w3c.dom.Element;
80 import org.w3c.dom.Node;
81 import org.xml.sax.SAXException;
84 * Holds URLs with YANG schema resources for all yang modules reported in
85 * ietf-netconf-yang-library/modules-state/modules node.
87 public final class LibraryModulesSchemas implements NetconfDeviceSchemas {
89 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
90 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
91 private static final EffectiveModelContext LIBRARY_CONTEXT = BindingRuntimeHelpers.createEffectiveModel(
94 // FIXME: this is legacy RFC7895, add support for RFC8525 containers, too
95 private static final NodeIdentifier MODULES_STATE_NID = NodeIdentifier.create(ModulesState.QNAME);
96 private static final NodeIdentifier MODULE_NID = NodeIdentifier.create(Module.QNAME);
97 private static final NodeIdentifier NAME_NID = NodeIdentifier.create(QName.create(Module.QNAME, "name").intern());
98 private static final NodeIdentifier REVISION_NID = NodeIdentifier.create(
99 QName.create(Module.QNAME, "revision").intern());
100 private static final NodeIdentifier SCHEMA_NID = NodeIdentifier.create(
101 QName.create(Module.QNAME, "schema").intern());
102 private static final NodeIdentifier NAMESPACE_NID = NodeIdentifier.create(
103 QName.create(Module.QNAME, "namespace").intern());
105 private static final JSONCodecFactory JSON_CODECS = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
106 .getShared(LIBRARY_CONTEXT);
108 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
109 YangInstanceIdentifier.create(MODULES_STATE_NID, MODULE_NID);
111 private static final ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC = Builders.containerBuilder()
112 .withNodeIdentifier(NETCONF_GET_NODEID)
113 .withChild(NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT))
116 private final ImmutableMap<QName, URL> availableModels;
118 private LibraryModulesSchemas(final ImmutableMap<QName, URL> availableModels) {
119 this.availableModels = requireNonNull(availableModels);
122 public Map<SourceIdentifier, URL> getAvailableModels() {
123 final Map<SourceIdentifier, URL> result = new HashMap<>();
124 for (final Entry<QName, URL> entry : availableModels.entrySet()) {
125 final SourceIdentifier sId = RevisionSourceIdentifier.create(entry.getKey().getLocalName(),
126 entry.getKey().getRevision());
127 result.put(sId, entry.getValue());
134 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
136 * @param url URL pointing to yang library
137 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
139 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
141 final URL urlConnection = new URL(requireNonNull(url));
142 final URLConnection connection = urlConnection.openConnection();
144 if (connection instanceof HttpURLConnection) {
145 connection.setRequestProperty("Accept", "application/xml");
146 final String userpass = username + ":" + password;
147 connection.setRequestProperty("Authorization",
148 "Basic " + Base64.getEncoder().encodeToString(userpass.getBytes(StandardCharsets.UTF_8)));
151 return createFromURLConnection(connection);
153 } catch (final IOException e) {
154 LOG.warn("Unable to download yang library from {}", url, e);
155 return new LibraryModulesSchemas(ImmutableMap.of());
160 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
161 final DOMRpcResult moduleListNodeResult;
163 moduleListNodeResult =
164 deviceRpc.invokeRpc(NETCONF_GET_QNAME, GET_MODULES_STATE_MODULE_LIST_RPC).get();
165 } catch (final InterruptedException e) {
166 Thread.currentThread().interrupt();
167 throw new RuntimeException(deviceId + ": Interrupted while waiting for response to "
168 + MODULES_STATE_MODULE_LIST, e);
169 } catch (final ExecutionException e) {
170 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
171 MODULES_STATE_MODULE_LIST, e);
172 return new LibraryModulesSchemas(ImmutableMap.of());
175 if (moduleListNodeResult.getErrors().isEmpty() == false) {
176 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
177 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.getErrors());
178 return new LibraryModulesSchemas(ImmutableMap.of());
181 final Optional<? extends NormalizedNode<?, ?>> modulesStateNode =
182 findModulesStateNode(moduleListNodeResult.getResult());
183 if (modulesStateNode.isPresent()) {
184 final NormalizedNode<?, ?> node = modulesStateNode.get();
185 checkState(node instanceof ContainerNode, "Expecting container containing schemas, but was %s", node);
186 return create((ContainerNode) node);
189 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, MODULES_STATE_NID);
190 return new LibraryModulesSchemas(ImmutableMap.of());
193 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
194 final Optional<DataContainerChild<?, ?>> moduleListNode = modulesStateNode.getChild(MODULE_NID);
195 checkState(moduleListNode.isPresent(), "Unable to find list: %s in %s", MODULE_NID, modulesStateNode);
196 final DataContainerChild<?, ?> node = moduleListNode.get();
197 checkState(node instanceof MapNode, "Unexpected structure for container: %s in : %s. Expecting a list",
198 MODULE_NID, modulesStateNode);
200 final MapNode moduleList = (MapNode) node;
201 final Collection<MapEntryNode> modules = moduleList.getValue();
202 final ImmutableMap.Builder<QName, URL> schemasMapping = ImmutableMap.builderWithExpectedSize(modules.size());
203 for (final MapEntryNode moduleNode : modules) {
204 final Entry<QName, URL> entry = createFromEntry(moduleNode);
206 schemasMapping.put(entry);
210 return new LibraryModulesSchemas(schemasMapping.build());
214 * Resolves URLs with YANG schema resources from modules-state.
215 * @param url URL pointing to yang library
216 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
218 public static LibraryModulesSchemas create(final String url) {
219 final URLConnection connection;
221 connection = new URL(requireNonNull(url)).openConnection();
222 } catch (final IOException e) {
223 LOG.warn("Unable to download yang library from {}", url, e);
224 return new LibraryModulesSchemas(ImmutableMap.of());
227 if (connection instanceof HttpURLConnection) {
228 connection.setRequestProperty("Accept", "application/xml");
230 return createFromURLConnection(connection);
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(NETCONF_DATA_NODEID);
239 if (dataNode.isPresent() == false) {
240 return Optional.empty();
243 return ((DataContainerNode<?>) dataNode.get()).getChild(MODULES_STATE_NID);
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 requireNonNull(contentType, "Content type unknown");
256 checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
257 "Only XML and JSON types are supported.");
259 Optional<NormalizedNode<?, ?>> optionalModulesStateNode = Optional.empty();
260 try (InputStream in = connection.getInputStream()) {
261 optionalModulesStateNode = contentType.equals("application/json") ? readJson(in) : readXml(in);
262 } catch (final IOException e) {
263 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
266 if (!optionalModulesStateNode.isPresent()) {
267 return new LibraryModulesSchemas(ImmutableMap.of());
270 final NormalizedNode<?, ?> modulesStateNode = optionalModulesStateNode.get();
271 checkState(modulesStateNode instanceof ContainerNode, "Expecting container containing module list, but was %s",
273 final ContainerNode modulesState = (ContainerNode) modulesStateNode;
274 final NodeIdentifier nodeName = modulesState.getIdentifier();
275 checkState(MODULES_STATE_NID.equals(nodeName), "Wrong container identifier %s", nodeName);
277 return create((ContainerNode) modulesStateNode);
280 private static boolean guessJsonFromFileName(final String fileName) {
281 final int i = fileName.lastIndexOf('.');
282 return i != 1 && ".json".equalsIgnoreCase(fileName.substring(i));
285 private static Optional<NormalizedNode<?, ?>> readJson(final InputStream in) {
286 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
287 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
289 final JsonParserStream jsonParser = JsonParserStream.create(writer, JSON_CODECS);
290 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
292 jsonParser.parse(reader);
294 return resultHolder.isFinished() ? Optional.of(resultHolder.getResult()) : Optional.empty();
297 private static Optional<NormalizedNode<?, ?>> readXml(final InputStream in) {
299 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
301 final Document read = docBuilder.parse(in);
302 final Document doc = docBuilder.newDocument();
303 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
305 doc.appendChild(rootElement);
307 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
308 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
309 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
310 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
311 rootElement.appendChild(module);
313 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
314 read.getElementsByTagName("module").item(i).getTextContent());
318 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
319 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
320 final XmlParserStream xmlParser = XmlParserStream.create(writer, LIBRARY_CONTEXT,
321 LIBRARY_CONTEXT.findDataChildByName(ModulesState.QNAME).orElseThrow());
322 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
323 final NormalizedNode<?, ?> parsed = resultHolder.getResult();
324 return Optional.of(parsed);
325 } catch (XMLStreamException | URISyntaxException | IOException | SAXException e) {
326 LOG.warn("Unable to parse yang library xml content", e);
329 return Optional.empty();
332 private static @Nullable Entry<QName, URL> createFromEntry(final MapEntryNode moduleNode) {
333 checkArgument(moduleNode.getNodeType().equals(Module.QNAME), "Wrong QName %s", moduleNode.getNodeType());
335 final String moduleName = getSingleChildNodeValue(moduleNode, NAME_NID).get();
336 final Optional<String> revision = getSingleChildNodeValue(moduleNode, REVISION_NID);
337 if (revision.isPresent()) {
338 if (!Revision.STRING_FORMAT_PATTERN.matcher(revision.get()).matches()) {
339 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
344 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
345 // don't fail if schema node is not present, just skip the entry or add some default URL
346 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, SCHEMA_NID);
347 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, NAMESPACE_NID).get();
349 final QName moduleQName = revision.isPresent()
350 ? QName.create(moduleNameSpace, revision.get(), moduleName)
351 : QName.create(URI.create(moduleNameSpace), moduleName);
354 return new SimpleImmutableEntry<>(moduleQName, new URL(schemaUriAsString.get()));
355 } catch (final MalformedURLException e) {
356 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
357 moduleNode, schemaUriAsString.get());
362 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode,
363 final NodeIdentifier childNodeId) {
364 final Optional<DataContainerChild<?, ?>> node = schemaNode.getChild(childNodeId);
365 checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
366 return getValueOfSimpleNode(node.get());
369 private static Optional<String> getValueOfSimpleNode(final NormalizedNode<?, ?> node) {
370 final String valueStr = node.getValue().toString();
371 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
375 public Set<QName> getAvailableYangSchemasQNames() {