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;
15 import static org.opendaylight.yang.svc.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.YangModuleInfoImpl.qnameOf;
17 import com.google.common.base.Strings;
18 import com.google.common.collect.ImmutableMap;
19 import com.google.common.util.concurrent.FutureCallback;
20 import com.google.common.util.concurrent.Futures;
21 import com.google.common.util.concurrent.ListenableFuture;
22 import com.google.common.util.concurrent.MoreExecutors;
23 import com.google.common.util.concurrent.SettableFuture;
24 import com.google.gson.stream.JsonReader;
25 import java.io.IOException;
26 import java.io.InputStream;
27 import java.io.InputStreamReader;
28 import java.net.HttpURLConnection;
29 import java.net.MalformedURLException;
31 import java.net.URLConnection;
32 import java.nio.charset.Charset;
33 import java.nio.charset.StandardCharsets;
34 import java.util.Base64;
35 import java.util.HashMap;
37 import java.util.Map.Entry;
38 import java.util.Optional;
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.NonNull;
45 import org.eclipse.jdt.annotation.Nullable;
46 import org.opendaylight.mdsal.binding.runtime.spi.BindingRuntimeHelpers;
47 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
48 import org.opendaylight.netconf.client.mdsal.api.NetconfDeviceSchemas;
49 import org.opendaylight.netconf.client.mdsal.api.RemoteDeviceId;
50 import org.opendaylight.netconf.client.mdsal.impl.NetconfMessageTransformUtil;
51 import org.opendaylight.netconf.client.mdsal.spi.NetconfDeviceRpc;
52 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.Get;
53 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesState;
54 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.YangLibrary;
55 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.Module;
56 import org.opendaylight.yangtools.util.xml.UntrustedXML;
57 import org.opendaylight.yangtools.yang.common.ErrorSeverity;
58 import org.opendaylight.yangtools.yang.common.OperationFailedException;
59 import org.opendaylight.yangtools.yang.common.QName;
60 import org.opendaylight.yangtools.yang.common.Revision;
61 import org.opendaylight.yangtools.yang.common.XMLNamespace;
62 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
63 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
64 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
65 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
66 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
67 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
68 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
69 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
70 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizationResult;
71 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
72 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
73 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
74 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
75 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
76 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
77 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizationResultHolder;
78 import org.opendaylight.yangtools.yang.data.spi.node.ImmutableNodes;
79 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
80 import org.opendaylight.yangtools.yang.model.api.source.SourceIdentifier;
81 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
82 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
83 import org.slf4j.Logger;
84 import org.slf4j.LoggerFactory;
85 import org.w3c.dom.Document;
86 import org.w3c.dom.Element;
87 import org.w3c.dom.Node;
88 import org.xml.sax.SAXException;
91 * Holds URLs with YANG schema resources for all yang modules reported in
92 * ietf-netconf-yang-library/modules-state/modules node.
94 public final class LibraryModulesSchemas implements NetconfDeviceSchemas {
95 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
96 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
97 private static final EffectiveModelContext LIBRARY_CONTEXT = BindingRuntimeHelpers.createEffectiveModel(
99 private static final Inference MODULES_STATE_INFERENCE =
100 SchemaInferenceStack.ofDataTreePath(LIBRARY_CONTEXT, ModulesState.QNAME).toInference();
102 // FIXME: this is legacy RFC7895, add support for RFC8525 containers, too
103 private static final NodeIdentifier MODULES_STATE_NID = NodeIdentifier.create(ModulesState.QNAME);
104 private static final NodeIdentifier MODULE_NID = NodeIdentifier.create(Module.QNAME);
105 private static final NodeIdentifier NAME_NID = NodeIdentifier.create(qnameOf("name"));
106 private static final NodeIdentifier REVISION_NID = NodeIdentifier.create(qnameOf("revision"));
107 private static final NodeIdentifier SCHEMA_NID = NodeIdentifier.create(qnameOf("schema"));
108 private static final NodeIdentifier NAMESPACE_NID = NodeIdentifier.create(qnameOf("namespace"));
110 private static final JSONCodecFactory JSON_CODECS = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
111 .getShared(LIBRARY_CONTEXT);
113 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
114 YangInstanceIdentifier.of(MODULES_STATE_NID, MODULE_NID);
116 private static final @NonNull ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC = ImmutableNodes.newContainerBuilder()
117 .withNodeIdentifier(NETCONF_GET_NODEID)
118 .withChild(NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT))
120 private static final @NonNull LibraryModulesSchemas EMPTY = new LibraryModulesSchemas(ImmutableMap.of());
122 private final ImmutableMap<QName, URL> availableModels;
124 private LibraryModulesSchemas(final ImmutableMap<QName, URL> availableModels) {
125 this.availableModels = requireNonNull(availableModels);
128 // FIXME: this should work on NetconfRpcService
129 public static ListenableFuture<LibraryModulesSchemas> forDevice(final NetconfDeviceRpc deviceRpc,
130 final RemoteDeviceId deviceId) {
131 final var future = SettableFuture.<LibraryModulesSchemas>create();
132 Futures.addCallback(deviceRpc.invokeNetconf(Get.QNAME, GET_MODULES_STATE_MODULE_LIST_RPC),
133 new FutureCallback<DOMRpcResult>() {
135 public void onSuccess(final DOMRpcResult result) {
136 onGetModulesStateResult(future, deviceId, result);
140 public void onFailure(final Throwable cause) {
141 // debug, because we expect this error to be reported by caller
142 LOG.debug("{}: Unable to detect available schemas", deviceId, cause);
143 future.setException(cause);
145 }, MoreExecutors.directExecutor());
149 private static void onGetModulesStateResult(final SettableFuture<LibraryModulesSchemas> future,
150 final RemoteDeviceId deviceId, final DOMRpcResult result) {
151 // Two-pass error reporting: first check if there is a hard error, then log any remaining warnings
152 final var errors = result.errors();
153 if (errors.stream().anyMatch(error -> error.getSeverity() == ErrorSeverity.ERROR)) {
154 // FIXME: a good exception, which can report the contents of errors?
155 future.setException(new OperationFailedException("Failed to get modules-state", errors));
158 for (var error : errors) {
159 LOG.info("{}: schema retrieval warning: {}", deviceId, error);
162 final var value = result.value();
164 LOG.warn("{}: missing RPC output", deviceId);
168 final var data = value.childByArg(NETCONF_DATA_NODEID);
170 LOG.warn("{}: missing RPC data", deviceId);
174 // FIXME: right: this was never implemented correctly, as the origical code always produces CCE because it
175 // interpreted 'data' anyxml as a DataContainerNode!
176 future.setException(new UnsupportedOperationException("Missing normalization logic for " + data.prettyTree()));
179 public Map<SourceIdentifier, URL> getAvailableModels() {
180 final var result = new HashMap<SourceIdentifier, URL>();
181 for (var entry : availableModels.entrySet()) {
182 final var sId = new SourceIdentifier(entry.getKey().getLocalName(),
183 entry.getKey().getRevision().map(Revision::toString).orElse(null));
184 result.put(sId, entry.getValue());
191 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
193 * @param url URL pointing to yang library
194 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
196 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
198 final URL urlConnection = new URL(requireNonNull(url));
199 final URLConnection connection = urlConnection.openConnection();
201 if (connection instanceof HttpURLConnection) {
202 connection.setRequestProperty("Accept", "application/xml");
203 final String userpass = username + ":" + password;
204 connection.setRequestProperty("Authorization",
205 "Basic " + Base64.getEncoder().encodeToString(userpass.getBytes(StandardCharsets.UTF_8)));
208 return createFromURLConnection(connection);
210 } catch (final IOException e) {
211 LOG.warn("Unable to download yang library from {}", url, e);
212 return new LibraryModulesSchemas(ImmutableMap.of());
216 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
217 final Optional<DataContainerChild> moduleListNode = modulesStateNode.findChildByArg(MODULE_NID);
218 checkState(moduleListNode.isPresent(), "Unable to find list: %s in %s", MODULE_NID, modulesStateNode);
219 final var node = moduleListNode.orElseThrow();
220 checkState(node instanceof MapNode, "Unexpected structure for container: %s in : %s. Expecting a list",
221 MODULE_NID, modulesStateNode);
223 final var moduleList = (MapNode) node;
224 final var builder = ImmutableMap.<QName, URL>builderWithExpectedSize(moduleList.size());
225 for (var moduleNode : moduleList.body()) {
226 final var entry = createFromEntry(moduleNode);
232 return new LibraryModulesSchemas(builder.build());
236 * Resolves URLs with YANG schema resources from modules-state.
237 * @param url URL pointing to yang library
238 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
240 public static LibraryModulesSchemas create(final String url) {
241 final URLConnection connection;
243 connection = new URL(requireNonNull(url)).openConnection();
244 } catch (final IOException e) {
245 LOG.warn("Unable to download yang library from {}", url, e);
246 return new LibraryModulesSchemas(ImmutableMap.of());
249 if (connection instanceof HttpURLConnection) {
250 connection.setRequestProperty("Accept", "application/xml");
252 return createFromURLConnection(connection);
255 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
257 String contentType = connection.getContentType();
259 // TODO try to guess Json also from intput stream
260 if (guessJsonFromFileName(connection.getURL().getFile())) {
261 contentType = "application/json";
264 requireNonNull(contentType, "Content type unknown");
265 checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
266 "Only XML and JSON types are supported.");
268 Optional<NormalizedNode> optionalModulesStateNode = Optional.empty();
269 try (InputStream in = connection.getInputStream()) {
270 optionalModulesStateNode = contentType.equals("application/json") ? readJson(in) : readXml(in);
271 } catch (final IOException e) {
272 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
275 if (optionalModulesStateNode.isEmpty()) {
276 return new LibraryModulesSchemas(ImmutableMap.of());
279 final NormalizedNode modulesStateNode = optionalModulesStateNode.orElseThrow();
280 checkState(modulesStateNode instanceof ContainerNode, "Expecting container containing module list, but was %s",
282 final ContainerNode modulesState = (ContainerNode) modulesStateNode;
283 final NodeIdentifier nodeName = modulesState.name();
284 checkState(MODULES_STATE_NID.equals(nodeName), "Wrong container identifier %s", nodeName);
286 return create((ContainerNode) modulesStateNode);
289 private static boolean guessJsonFromFileName(final String fileName) {
290 final int i = fileName.lastIndexOf('.');
291 return i != 1 && ".json".equalsIgnoreCase(fileName.substring(i));
294 private static Optional<NormalizedNode> readJson(final InputStream in) {
295 final NormalizationResultHolder resultHolder = new NormalizationResultHolder();
296 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
298 final JsonParserStream jsonParser = JsonParserStream.create(writer, JSON_CODECS);
299 final JsonReader reader = new JsonReader(new InputStreamReader(in, Charset.defaultCharset()));
301 jsonParser.parse(reader);
303 final NormalizationResult<?> result = resultHolder.result();
304 return result == null ? Optional.empty() : Optional.of(result.data());
307 private static Optional<NormalizedNode> readXml(final InputStream in) {
309 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
311 final Document read = docBuilder.parse(in);
312 final Document doc = docBuilder.newDocument();
313 final Element rootElement = doc.createElementNS(ModulesState.QNAME.getNamespace().toString(),
314 ModulesState.QNAME.getLocalName());
315 doc.appendChild(rootElement);
317 // FIXME: also namespace?!
318 final var revisions = read.getElementsByTagName("revision");
320 for (int i = 0, length = revisions.getLength(); i < length; i++) {
321 final String revision = revisions.item(i).getTextContent();
322 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
323 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
324 rootElement.appendChild(module);
326 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
327 read.getElementsByTagName("module").item(i).getTextContent());
331 final NormalizationResultHolder resultHolder = new NormalizationResultHolder();
332 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
333 final XmlParserStream xmlParser = XmlParserStream.create(writer, MODULES_STATE_INFERENCE);
334 xmlParser.traverse(new DOMSource(doc.getDocumentElement()));
335 return Optional.of(resultHolder.getResult().data());
336 } catch (XMLStreamException | IOException | SAXException e) {
337 LOG.warn("Unable to parse yang library xml content", e);
340 return Optional.empty();
343 private static @Nullable Entry<QName, URL> createFromEntry(final MapEntryNode moduleNode) {
344 final QName moduleNodeId = moduleNode.name().getNodeType();
345 checkArgument(moduleNodeId.equals(Module.QNAME), "Wrong QName %s", moduleNodeId);
347 final String moduleName = getSingleChildNodeValue(moduleNode, NAME_NID).orElseThrow();
348 final Optional<String> revision = getSingleChildNodeValue(moduleNode, REVISION_NID);
349 if (revision.isPresent()) {
350 final var rev = revision.orElseThrow();
351 if (!Revision.STRING_FORMAT_PATTERN.matcher(rev).matches()) {
352 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, rev);
357 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
358 // don't fail if schema node is not present, just skip the entry or add some default URL
359 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, SCHEMA_NID);
360 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, NAMESPACE_NID).orElseThrow();
362 final QName moduleQName = revision.isPresent()
363 ? QName.create(moduleNameSpace, revision.orElseThrow(), moduleName)
364 : QName.create(XMLNamespace.of(moduleNameSpace), moduleName);
367 return Map.entry(moduleQName, new URL(schemaUriAsString.orElseThrow()));
368 } catch (final MalformedURLException e) {
369 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
370 moduleNode, schemaUriAsString.orElseThrow());
375 private static Optional<String> getSingleChildNodeValue(final DataContainerNode schemaNode,
376 final NodeIdentifier childNodeId) {
377 final Optional<DataContainerChild> node = schemaNode.findChildByArg(childNodeId);
378 checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
379 return getValueOfSimpleNode(node.orElseThrow());
382 private static Optional<String> getValueOfSimpleNode(final NormalizedNode node) {
383 final String valueStr = node.body().toString();
384 return Strings.isNullOrEmpty(valueStr) ? Optional.empty() : Optional.of(valueStr.trim());
388 public Set<QName> getAvailableYangSchemasQNames() {