Disable XSD validation when xsi:schemaLocation doesn't declare the hint for the document element root.

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/extensions/contentmodel/ContentModelPlugin.java

@@ -12,6 +12,8 @@
  */
 package org.eclipse.lemminx.extensions.contentmodel;
 
+import java.util.Objects;
+
 import org.eclipse.lemminx.dom.DOMDocument;
 import org.eclipse.lemminx.extensions.contentmodel.commands.XMLValidationAllFilesCommand;
 import org.eclipse.lemminx.extensions.contentmodel.commands.XMLValidationFileCommand;
@@ -24,6 +26,7 @@
 import org.eclipse.lemminx.extensions.contentmodel.participants.ContentModelTypeDefinitionParticipant;
 import org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics.ContentModelDiagnosticsParticipant;
 import org.eclipse.lemminx.extensions.contentmodel.settings.ContentModelSettings;
+import org.eclipse.lemminx.extensions.contentmodel.settings.XMLValidationSettings;
 import org.eclipse.lemminx.services.IXMLDocumentProvider;
 import org.eclipse.lemminx.services.IXMLValidationService;
 import org.eclipse.lemminx.services.extensions.ICodeActionParticipant;
@@ -69,6 +72,8 @@ public class ContentModelPlugin implements IXMLExtension {
 
  private ContentModelSettings cmSettings;
 
+ private XMLValidationSettings currentValidationSettings;
+
  public ContentModelPlugin() {
  completionParticipant = new ContentModelCompletionParticipant();
  hoverParticipant = new ContentModelHoverParticipant();
@@ -105,6 +110,8 @@ private void updateSettings(ISaveContext saveContext) {
  cmSettings = ContentModelSettings.getContentModelXMLSettings(initializationOptionsSettings);
  if (cmSettings != null) {
  updateSettings(cmSettings, saveContext);
+ } else {
+ currentValidationSettings = null;
  }
  }
 
@@ -144,6 +151,12 @@ private void updateSettings(ContentModelSettings settings, ISaveContext context)
  // Update symbols
  boolean showReferencedGrammars = settings.isShowReferencedGrammars();
  symbolsProviderParticipant.setEnabled(showReferencedGrammars);
+ // Track if validation settings has changed
+ XMLValidationSettings oldValidationSettings = currentValidationSettings;
+ currentValidationSettings = cmSettings.getValidation();
+ if (oldValidationSettings != null && !Objects.equals(oldValidationSettings, currentValidationSettings)) {
+ context.collectDocumentToValidate(d -> true);
+ }
  }
 
  @Override

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/extensions/contentmodel/participants/diagnostics/XMLValidator.java

@@ -13,23 +13,31 @@
 package org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.StringReader;
+import java.net.URL;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CancellationException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import org.apache.xerces.impl.XMLEntityManager;
 import org.apache.xerces.parsers.SAXParser;
+import org.apache.xerces.util.URI.MalformedURIException;
 import org.apache.xerces.xni.grammars.XMLGrammarPool;
 import org.apache.xerces.xni.parser.XMLEntityResolver;
 import org.eclipse.lemminx.dom.DOMAttr;
 import org.eclipse.lemminx.dom.DOMDocument;
 import org.eclipse.lemminx.dom.DOMDocumentType;
 import org.eclipse.lemminx.dom.DOMElement;
+import org.eclipse.lemminx.dom.NoNamespaceSchemaLocation;
+import org.eclipse.lemminx.dom.SchemaLocationHint;
 import org.eclipse.lemminx.extensions.contentmodel.model.ContentModelManager;
 import org.eclipse.lemminx.extensions.contentmodel.participants.XMLSyntaxErrorCode;
+import org.eclipse.lemminx.extensions.contentmodel.settings.SchemaEnabled;
+import org.eclipse.lemminx.extensions.contentmodel.settings.XMLSchemaSettings;
 import org.eclipse.lemminx.extensions.contentmodel.settings.XMLValidationSettings;
 import org.eclipse.lemminx.services.extensions.diagnostics.LSPContentHandler;
 import org.eclipse.lemminx.uriresolver.CacheResourceDownloadingException;
@@ -82,19 +90,24 @@ public static void doDiagnostics(DOMDocument document, XMLEntityResolver entityR
  // Add LSP content handler to stop XML parsing if monitor is canceled.
  parser.setContentHandler(new LSPContentHandler(monitor));
 
- boolean hasSchemaGrammar = document.hasSchemaLocation() || document.hasNoNamespaceSchemaLocation()
- || hasExternalSchemaGrammar(document);
- boolean hasGrammar = document.hasDTD() || hasSchemaGrammar || document.hasExternalGrammar();
- // If diagnostics for Schema preference is enabled
- if ((validationSettings == null) || validationSettings.isSchema()) {
+ // warn if XML document is not bound to a grammar according the settings
+ warnNoGrammar(document, diagnostics, validationSettings);
+ // Update external grammar location (file association)
+ updateExternalGrammarLocation(document, parser);
 
- updateExternalGrammarLocation(document, parser);
- parser.setFeature("http://apache.org/xml/features/validation/schema", hasSchemaGrammar); //$NON-NLS-1$
+ boolean hasSchemaLocation = document.hasSchemaLocation();
+ boolean hasNoNamespaceSchemaLocation = document.hasNoNamespaceSchemaLocation();
+ boolean hasSchemaGrammar = hasSchemaLocation || hasNoNamespaceSchemaLocation
+ || hasExternalSchemaGrammar(document);
+ boolean schemaValidationEnabled = (hasSchemaGrammar
+ && isSchemaValidationEnabled(document, validationSettings)
+ || (hasNoNamespaceSchemaLocation
+ && isNoNamespaceSchemaValidationEnabled(document, validationSettings)));
+ parser.setFeature("http://apache.org/xml/features/validation/schema", schemaValidationEnabled); //$NON-NLS-1$
 
- // warn if XML document is not bound to a grammar according the settings
- warnNoGrammar(document, diagnostics, validationSettings);
- } else {
- hasGrammar = false; // validation for Schema was disabled
+ boolean hasGrammar = document.hasDTD() || hasSchemaGrammar || document.hasExternalGrammar();
+ if (hasSchemaGrammar && !schemaValidationEnabled) {
+ hasGrammar = false;
  }
  parser.setFeature("http://xml.org/sax/features/validation", hasGrammar); //$NON-NLS-1$
 
@@ -114,6 +127,125 @@ public static void doDiagnostics(DOMDocument document, XMLEntityResolver entityR
  }
  }
 
+ private static boolean isSchemaValidationEnabled(DOMDocument document, XMLValidationSettings validationSettings) {
+ if (validationSettings == null) {
+ return true;
+ }
+ SchemaEnabled enabled = SchemaEnabled.always;
+ XMLSchemaSettings schemaSettings = validationSettings.getSchema();
+ if (schemaSettings != null && schemaSettings.getEnabled() != null) {
+ enabled = schemaSettings.getEnabled();
+ }
+ switch (enabled) {
+ case always:
+ return true;
+ case never:
+ return false;
+ case onValidSchema:
+ return isValidSchemaLocation(document);
+ default:
+ return true;
+ }
+ }
+
+ /**
+ * Returns true if the given DOM document declares a xsi:schemaLocation hint for
+ * the document root element is valid and false otherwise.
+ * 
+ * The xsi:schemaLocation is valid if:
+ * 
+ * <ul>
+ * <li>xsi:schemaLocation defines an URI for the namespace of the document
+ * element.</li>
+ * <li>the URI can be opened</li>
+ * </ul>
+ * 
+ * @param document the DOM document.
+ * @return true if the given DOM document declares a xsi:schemaLocation hint for
+ * the document root element is valid and false otherwise.
+ */
+ private static boolean isValidSchemaLocation(DOMDocument document) {
+ if (!document.hasSchemaLocation()) {
+ return false;
+ }
+ String namespaceURI = document.getNamespaceURI();
+ SchemaLocationHint hint = document.getSchemaLocation().getLocationHint(namespaceURI);
+ if (hint == null) {
+ return false;
+ }
+ String location = hint.getHint();
+ return isValidLocation(document.getDocumentURI(), location);
+ }
+
+ private static boolean isNoNamespaceSchemaValidationEnabled(DOMDocument document,
+ XMLValidationSettings validationSettings) {
+ if (validationSettings == null) {
+ return true;
+ }
+ SchemaEnabled enabled = SchemaEnabled.always;
+ XMLSchemaSettings schemaSettings = validationSettings.getSchema();
+ if (schemaSettings != null && schemaSettings.getEnabled() != null) {
+ enabled = schemaSettings.getEnabled();
+ }
+ switch (enabled) {
+ case always:
+ return true;
+ case never:
+ return false;
+ case onValidSchema:
+ return isValidNoNamespaceSchemaLocation(document);
+ default:
+ return true;
+ }
+ }
+
+ /**
+ * Returns true if the given DOM document declares a
+ * xsi:noNamespaceSchemaLocation which is valid and false otherwise.
+ * 
+ * The xsi:noNamespaceSchemaLocation is valid if:
+ * 
+ * <ul>
+ * <li>xsi:noNamespaceSchemaLocation defines an URI.</li>
+ * <li>the URI can be opened</li>
+ * </ul>
+ * 
+ * @param document the DOM document.
+ * @return true if the given DOM document declares a xsi:schemaLocation hint for
+ * the document root element is valid and false otherwise.
+ */
+ private static boolean isValidNoNamespaceSchemaLocation(DOMDocument document) {
+ NoNamespaceSchemaLocation noNamespaceSchemaLocation = document.getNoNamespaceSchemaLocation();
+ if (noNamespaceSchemaLocation == null) {
+ return false;
+ }
+ String location = noNamespaceSchemaLocation.getLocation();
+ return isValidLocation(document.getDocumentURI(), location);
+ }
+
+ private static boolean isValidLocation(String documentURI, String location) {
+ String resolvedLocation = getResolvedLocation(documentURI, location);
+ if (resolvedLocation == null) {
+ return false;
+ }
+ try (InputStream is = new URL(resolvedLocation).openStream()) {
+ return true;
+ } catch (Exception e) {
+ return false;
+ }
+ }
+
+ private static String getResolvedLocation(String documentURI, String location) {
+ if (StringUtils.isBlank(location)) {
+ return null;
+ }
+ try {
+ return XMLEntityManager.expandSystemId(location, documentURI, false);
+ } catch (MalformedURIException e) {
+ return location;
+ }
+ }
+
  private static boolean hasExternalSchemaGrammar(DOMDocument document) {
  if (document.getExternalGrammarFromNamespaceURI() != null) {
  return true;

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/extensions/contentmodel/settings/SchemaEnabled.java

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) 2021 Red Hat Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v20.html
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ * Red Hat Inc. - initial API and implementation
+ */
+package org.eclipse.lemminx.extensions.contentmodel.settings;
+
+public enum SchemaEnabled {
+ always, never, onValidSchema;
+}

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/extensions/contentmodel/settings/XMLSchemaSettings.java

@@ -0,0 +1,56 @@
+/**
+ * Copyright (c) 2021 Red Hat Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v20.html
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ * Red Hat Inc. - initial API and implementation
+ */
+package org.eclipse.lemminx.extensions.contentmodel.settings;
+
+/**
+ * XML Schema settings.
+ *
+ */
+public class XMLSchemaSettings {
+
+ public XMLSchemaSettings() {
+ setEnabled(SchemaEnabled.always);
+ }
+
+ private SchemaEnabled enabled;
+
+ public void setEnabled(SchemaEnabled enabled) {
+ this.enabled = enabled;
+ }
+
+ @Override
+ public int hashCode() {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + ((enabled == null) ? 0 : enabled.hashCode());
+ return result;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj)
+ return true;
+ if (obj == null)
+ return false;
+ if (getClass() != obj.getClass())
+ return false;
+ XMLSchemaSettings other = (XMLSchemaSettings) obj;
+ if (enabled != other.enabled)
+ return false;
+ return true;
+ }
+
+ public SchemaEnabled getEnabled() {
+ return enabled;
+ }
+}