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.Optional;
17 import com.google.common.base.Preconditions;
18 import com.google.common.base.Strings;
19 import com.google.common.collect.ImmutableMap;
20 import com.google.common.collect.Maps;
21 import com.google.gson.stream.JsonReader;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.InputStreamReader;
25 import java.io.StringWriter;
26 import java.net.HttpURLConnection;
27 import java.net.MalformedURLException;
30 import java.net.URLConnection;
31 import java.util.AbstractMap;
32 import java.util.Collections;
35 import java.util.concurrent.ExecutionException;
36 import java.util.regex.Pattern;
37 import javax.xml.parsers.DocumentBuilder;
38 import javax.xml.transform.OutputKeys;
39 import javax.xml.transform.Transformer;
40 import javax.xml.transform.TransformerException;
41 import javax.xml.transform.TransformerFactory;
42 import javax.xml.transform.dom.DOMSource;
43 import javax.xml.transform.stream.StreamResult;
44 import org.opendaylight.controller.config.util.xml.XmlUtil;
45 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
46 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
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.rev160409.ModulesState;
52 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160409.module.list.Module;
53 import org.opendaylight.yangtools.util.xml.UntrustedXML;
54 import org.opendaylight.yangtools.yang.common.QName;
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.impl.codec.xml.XmlUtils;
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.data.impl.schema.transform.dom.parser.DomToNormalizedNodeParserFactory;
69 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
70 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
71 import org.opendaylight.yangtools.yang.model.repo.api.RevisionSourceIdentifier;
72 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
73 import org.slf4j.Logger;
74 import org.slf4j.LoggerFactory;
75 import org.w3c.dom.Document;
76 import org.w3c.dom.Element;
77 import org.w3c.dom.Node;
78 import org.xml.sax.SAXException;
81 * Holds URLs with YANG schema resources for all yang modules reported in
82 * ietf-netconf-yang-library/modules-state/modules node.
84 public class LibraryModulesSchemas implements NetconfDeviceSchemas {
86 private static final Logger LOG = LoggerFactory.getLogger(LibraryModulesSchemas.class);
87 private static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2})");
88 private static final SchemaContext LIBRARY_CONTEXT;
91 final ModuleInfoBackedContext moduleInfoBackedContext = ModuleInfoBackedContext.create();
92 moduleInfoBackedContext.registerModuleInfo(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang
93 .library.rev160409.$YangModuleInfoImpl.getInstance());
94 LIBRARY_CONTEXT = moduleInfoBackedContext.tryToCreateSchemaContext().get();
97 private final Map<QName, URL> availableModels;
99 private static final YangInstanceIdentifier MODULES_STATE_MODULE_LIST =
100 YangInstanceIdentifier.builder().node(ModulesState.QNAME).node(Module.QNAME).build();
102 private static final ContainerNode GET_MODULES_STATE_MODULE_LIST_RPC;
105 final DataContainerChild<?, ?> filter =
106 NetconfMessageTransformUtil.toFilterStructure(MODULES_STATE_MODULE_LIST, LIBRARY_CONTEXT);
107 GET_MODULES_STATE_MODULE_LIST_RPC =
108 Builders.containerBuilder().withNodeIdentifier(toId(NETCONF_GET_QNAME)).withChild(filter).build();
111 private LibraryModulesSchemas(final Map<QName, URL> availableModels) {
112 this.availableModels = availableModels;
115 public Map<SourceIdentifier, URL> getAvailableModels() {
116 final Map<SourceIdentifier, URL> result = Maps.newHashMap();
117 for (final Map.Entry<QName, URL> entry : availableModels.entrySet()) {
118 final SourceIdentifier sId = RevisionSourceIdentifier
119 .create(entry.getKey().getLocalName(), Optional.fromNullable(entry.getKey().getFormattedRevision()));
120 result.put(sId, entry.getValue());
128 * Resolves URLs with YANG schema resources from modules-state. Uses basic http authenticaiton
130 * @param url URL pointing to yang library
131 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
133 public static LibraryModulesSchemas create(final String url, final String username, final String password) {
134 Preconditions.checkNotNull(url);
136 final URL urlConnection = new URL(url);
137 final URLConnection connection = urlConnection.openConnection();
139 if (connection instanceof HttpURLConnection) {
140 connection.setRequestProperty("Accept", "application/xml");
141 final String userpass = username + ":" + password;
142 final String basicAuth = "Basic " + printBase64Binary(userpass.getBytes());
144 connection.setRequestProperty("Authorization", basicAuth);
147 return createFromURLConnection(connection);
149 } catch (final IOException e) {
150 LOG.warn("Unable to download yang library from {}", url, e);
151 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
156 public static LibraryModulesSchemas create(final NetconfDeviceRpc deviceRpc, final RemoteDeviceId deviceId) {
157 final DOMRpcResult moduleListNodeResult;
159 moduleListNodeResult =
160 deviceRpc.invokeRpc(toPath(NETCONF_GET_QNAME), GET_MODULES_STATE_MODULE_LIST_RPC).get();
161 } catch (final InterruptedException e) {
162 Thread.currentThread().interrupt();
163 throw new RuntimeException(deviceId + ": Interrupted while waiting for response to "
164 + MODULES_STATE_MODULE_LIST, e);
165 } catch (final ExecutionException e) {
166 LOG.warn("{}: Unable to detect available schemas, get to {} failed", deviceId,
167 MODULES_STATE_MODULE_LIST, e);
168 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
171 if (moduleListNodeResult.getErrors().isEmpty() == false) {
172 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}",
173 deviceId, MODULES_STATE_MODULE_LIST, moduleListNodeResult.getErrors());
174 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
178 final Optional<? extends NormalizedNode<?, ?>> modulesStateNode =
179 findModulesStateNode(moduleListNodeResult.getResult());
180 if (modulesStateNode.isPresent()) {
181 Preconditions.checkState(modulesStateNode.get() instanceof ContainerNode,
182 "Expecting container containing schemas, but was %s", modulesStateNode.get());
183 return create(((ContainerNode) modulesStateNode.get()));
185 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", deviceId, toId(ModulesState.QNAME));
186 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
190 private static LibraryModulesSchemas create(final ContainerNode modulesStateNode) {
191 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
192 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
193 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
194 modulesStateNode.getChild(moduleListNodeId);
195 Preconditions.checkState(moduleListNode.isPresent(),
196 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
197 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
198 "Unexpected structure for container: %s in : %s. Expecting a list",
199 moduleListNodeId, modulesStateNode);
201 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
202 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
203 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
204 if (schemaMappingEntry.isPresent()) {
205 schemasMapping.put(createFromEntry(moduleNode).get());
209 return new LibraryModulesSchemas(schemasMapping.build());
213 * Resolves URLs with YANG schema resources from modules-state.
214 * @param url URL pointing to yang library
215 * @return Resolved URLs with YANG schema resources for all yang modules from yang library
217 public static LibraryModulesSchemas create(final String url) {
218 Preconditions.checkNotNull(url);
220 final URL urlConnection = new URL(url);
221 final URLConnection connection = urlConnection.openConnection();
223 if (connection instanceof HttpURLConnection) {
224 connection.setRequestProperty("Accept", "application/xml");
227 return createFromURLConnection(connection);
229 } catch (final IOException e) {
230 LOG.warn("Unable to download yang library from {}", url, e);
231 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
235 private static Optional<? extends NormalizedNode<?, ?>> findModulesStateNode(final NormalizedNode<?, ?> result) {
236 if (result == null) {
237 return Optional.absent();
239 final Optional<DataContainerChild<?, ?>> dataNode =
240 ((DataContainerNode<?>) result).getChild(toId(NETCONF_DATA_QNAME));
241 if (dataNode.isPresent() == false) {
242 return Optional.absent();
245 return ((DataContainerNode<?>) dataNode.get()).getChild(toId(ModulesState.QNAME));
248 private static LibraryModulesSchemas createFromURLConnection(final URLConnection connection) {
250 String contentType = connection.getContentType();
252 // TODO try to guess Json also from intput stream
253 if (guessJsonFromFileName(connection.getURL().getFile())) {
254 contentType = "application/json";
257 Preconditions.checkNotNull(contentType, "Content type unknown");
258 Preconditions.checkState(contentType.equals("application/json") || contentType.equals("application/xml"),
259 "Only XML and JSON types are supported.");
260 try (InputStream in = connection.getInputStream()) {
261 final Optional<NormalizedNode<?, ?>> optionalModulesStateNode =
262 contentType.equals("application/json") ? readJson(in) : readXml(in);
264 if (!optionalModulesStateNode.isPresent()) {
265 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
268 final NormalizedNode<?, ?> modulesStateNode = optionalModulesStateNode.get();
269 Preconditions.checkState(modulesStateNode.getNodeType().equals(ModulesState.QNAME),
270 "Wrong QName %s", modulesStateNode.getNodeType());
271 Preconditions.checkState(modulesStateNode instanceof ContainerNode,
272 "Expecting container containing module list, but was %s", modulesStateNode);
274 final YangInstanceIdentifier.NodeIdentifier moduleListNodeId =
275 new YangInstanceIdentifier.NodeIdentifier(Module.QNAME);
276 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> moduleListNode =
277 ((ContainerNode) modulesStateNode).getChild(moduleListNodeId);
278 Preconditions.checkState(moduleListNode.isPresent(),
279 "Unable to find list: %s in %s", moduleListNodeId, modulesStateNode);
280 Preconditions.checkState(moduleListNode.get() instanceof MapNode,
281 "Unexpected structure for container: %s in : %s. Expecting a list",
282 moduleListNodeId, modulesStateNode);
284 final ImmutableMap.Builder<QName, URL> schemasMapping = new ImmutableMap.Builder<>();
285 for (final MapEntryNode moduleNode : ((MapNode) moduleListNode.get()).getValue()) {
286 final Optional<Map.Entry<QName, URL>> schemaMappingEntry = createFromEntry(moduleNode);
287 if (schemaMappingEntry.isPresent()) {
288 schemasMapping.put(createFromEntry(moduleNode).get());
292 return new LibraryModulesSchemas(schemasMapping.build());
293 } catch (final IOException e) {
294 LOG.warn("Unable to download yang library from {}", connection.getURL(), e);
295 return new LibraryModulesSchemas(Collections.<QName, URL>emptyMap());
299 private static boolean guessJsonFromFileName(final String fileName) {
300 String extension = "";
301 final int i = fileName.lastIndexOf(46);
303 extension = fileName.substring(i).toLowerCase();
306 return extension.equals(".json");
309 private static Optional<NormalizedNode<?, ?>> readJson(final InputStream in) {
310 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
311 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
313 final JsonParserStream jsonParser = JsonParserStream.create(writer, LIBRARY_CONTEXT);
314 final JsonReader reader = new JsonReader(new InputStreamReader(in));
316 jsonParser.parse(reader);
318 return resultHolder.isFinished()
319 ? Optional.of(resultHolder.getResult()) : Optional.<NormalizedNode<?, ?>>absent();
322 private static Optional<NormalizedNode<?, ?>> readXml(final InputStream in) {
323 final DomToNormalizedNodeParserFactory parserFactory =
324 DomToNormalizedNodeParserFactory.getInstance(XmlUtils.DEFAULT_XML_CODEC_PROVIDER, LIBRARY_CONTEXT);
326 final DocumentBuilder docBuilder = UntrustedXML.newDocumentBuilder();
328 final Document read = docBuilder.parse(in);
329 final Document doc = docBuilder.newDocument();
330 final Element rootElement = doc.createElementNS("urn:ietf:params:xml:ns:yang:ietf-yang-library",
332 doc.appendChild(rootElement);
334 for (int i = 0; i < read.getElementsByTagName("revision").getLength(); i++) {
335 final String revision = read.getElementsByTagName("revision").item(i).getTextContent();
336 if (DATE_PATTERN.matcher(revision).find() || revision.isEmpty()) {
337 final Node module = doc.importNode(read.getElementsByTagName("module").item(i), true);
338 rootElement.appendChild(module);
340 LOG.warn("Xml contains wrong revision - {} - on module {}", revision,
341 read.getElementsByTagName("module").item(i).getTextContent());
345 final Transformer transformer = TransformerFactory.newInstance().newTransformer();
346 final StringWriter sw = new StringWriter();
347 transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
348 transformer.transform(new DOMSource(doc), new StreamResult(sw));
349 final NormalizedNode<?, ?> parsed =
350 parserFactory.getContainerNodeParser()
351 .parse(Collections.singleton(XmlUtil.readXmlToElement(sw.toString())),
352 (ContainerSchemaNode) LIBRARY_CONTEXT.getDataChildByName(ModulesState.QNAME));
353 return Optional.of(parsed);
354 } catch (final SAXException | IOException | TransformerException e) {
355 LOG.warn("Unable to parse yang library xml content", e);
358 return Optional.<NormalizedNode<?, ?>>absent();
361 private static Optional<Map.Entry<QName, URL>> createFromEntry(final MapEntryNode moduleNode) {
362 Preconditions.checkArgument(
363 moduleNode.getNodeType().equals(Module.QNAME), "Wrong QName %s", moduleNode.getNodeType());
365 YangInstanceIdentifier.NodeIdentifier childNodeId =
366 new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "name"));
367 final String moduleName = getSingleChildNodeValue(moduleNode, childNodeId).get();
369 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "revision"));
370 final Optional<String> revision = getSingleChildNodeValue(moduleNode, childNodeId);
371 if (revision.isPresent()) {
372 if (!SourceIdentifier.REVISION_PATTERN.matcher(revision.get()).matches()) {
373 LOG.warn("Skipping library schema for {}. Revision {} is in wrong format.", moduleNode, revision.get());
374 return Optional.<Map.Entry<QName, URL>>absent();
378 // FIXME leaf schema with url that represents the yang schema resource for this module is not mandatory
379 // don't fail if schema node is not present, just skip the entry or add some default URL
380 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "schema"));
381 final Optional<String> schemaUriAsString = getSingleChildNodeValue(moduleNode, childNodeId);
383 childNodeId = new YangInstanceIdentifier.NodeIdentifier(QName.create(Module.QNAME, "namespace"));
384 final String moduleNameSpace = getSingleChildNodeValue(moduleNode, childNodeId).get();
386 final QName moduleQName = revision.isPresent()
387 ? QName.create(moduleNameSpace, revision.get(), moduleName)
388 : QName.create(URI.create(moduleNameSpace), null, moduleName);
391 return Optional.<Map.Entry<QName, URL>>of(new AbstractMap.SimpleImmutableEntry<>(
392 moduleQName, new URL(schemaUriAsString.get())));
393 } catch (final MalformedURLException e) {
394 LOG.warn("Skipping library schema for {}. URL {} representing yang schema resource is not valid",
395 moduleNode, schemaUriAsString.get());
396 return Optional.<Map.Entry<QName, URL>>absent();
400 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode,
401 final YangInstanceIdentifier.NodeIdentifier childNodeId) {
402 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> node =
403 schemaNode.getChild(childNodeId);
404 Preconditions.checkArgument(node.isPresent(), "Child node %s not present", childNodeId.getNodeType());
405 return getValueOfSimpleNode(node.get());
408 private static Optional<String> getValueOfSimpleNode(
409 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> node) {
410 final Object value = node.getValue();
411 return value == null || Strings.isNullOrEmpty(value.toString())
412 ? Optional.<String>absent() : Optional.of(value.toString().trim());
416 public Set<QName> getAvailableYangSchemasQNames() {