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59 changes: 59 additions & 0 deletions
59
bundles/org.eclipse.jface/src/org/eclipse/jface/internal/XmlProcessorFactoryJFace.java
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/******************************************************************************* | ||
* Copyright (c) 2023 Joerg Kubitz and others. | ||
* | ||
* This program and the accompanying materials | ||
* are made available under the terms of the Eclipse Public License 2.0 | ||
* which accompanies this distribution, and is available at | ||
* https://www.eclipse.org/legal/epl-2.0/ | ||
* | ||
* SPDX-License-Identifier: EPL-2.0 | ||
*******************************************************************************/ | ||
package org.eclipse.jface.internal; | ||
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import javax.xml.parsers.DocumentBuilder; | ||
import javax.xml.parsers.DocumentBuilderFactory; | ||
import javax.xml.parsers.ParserConfigurationException; | ||
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/** | ||
* XML processing which prohibits external entities. | ||
* | ||
* @see <a href="https://rules.sonarsource.com/java/RSPEC-2755/">RSPEC-2755</a> | ||
*/ | ||
/* A copy of org.eclipse.core.internal.runtime.XmlProcessorFactory for jface. */ | ||
public class XmlProcessorFactoryJFace { | ||
private XmlProcessorFactoryJFace() { | ||
// static Utility only | ||
} | ||
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private static final DocumentBuilderFactory DOCUMENT_BUILDER_FACTORY_ERROR_ON_DOCTYPE = createDocumentBuilderFactoryWithErrorOnDOCTYPE(); | ||
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/** | ||
* Creates DocumentBuilderFactory which throws SAXParseException when detecting | ||
* external entities. It's magnitudes faster to call | ||
* {@link #createDocumentBuilderWithErrorOnDOCTYPE()}. | ||
* | ||
* @return javax.xml.parsers.DocumentBuilderFactory | ||
*/ | ||
public static synchronized DocumentBuilderFactory createDocumentBuilderFactoryWithErrorOnDOCTYPE() { | ||
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); | ||
// completely disable DOCTYPE declaration: | ||
try { | ||
factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true); //$NON-NLS-1$ | ||
} catch (ParserConfigurationException e) { | ||
throw new RuntimeException(e.getMessage(), e); | ||
} | ||
return factory; | ||
} | ||
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/** | ||
* Creates DocumentBuilder which throws SAXParseException when detecting | ||
* external entities. The builder is not thread safe. | ||
* | ||
* @return javax.xml.parsers.DocumentBuilder | ||
* @throws ParserConfigurationException | ||
*/ | ||
public static DocumentBuilder createDocumentBuilderWithErrorOnDOCTYPE() throws ParserConfigurationException { | ||
return DOCUMENT_BUILDER_FACTORY_ERROR_ON_DOCTYPE.newDocumentBuilder(); | ||
} | ||
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} |
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