From 7c2de3a6f28dec61aaec38c64f9876a9d968a9ef Mon Sep 17 00:00:00 2001
From: j2blake <jeb228@cornell.edu>
Date: Mon, 4 Feb 2013 17:22:29 -0500
Subject: [PATCH] Clean up web.xml and create a unit test to keep it clean.

VIVO-19
---
 .../mannlib/vitro/webapp/WebXmlTest.java      | 307 ++++++++++++++++++
 webapp/web/WEB-INF/web.xml                    | 187 +----------
 2 files changed, 310 insertions(+), 184 deletions(-)
 create mode 100644 webapp/test/edu/cornell/mannlib/vitro/webapp/WebXmlTest.java

diff --git a/webapp/test/edu/cornell/mannlib/vitro/webapp/WebXmlTest.java b/webapp/test/edu/cornell/mannlib/vitro/webapp/WebXmlTest.java
new file mode 100644
index 000000000..4b6b7510d
--- /dev/null
+++ b/webapp/test/edu/cornell/mannlib/vitro/webapp/WebXmlTest.java
@@ -0,0 +1,307 @@
+/* $This file is distributed under the terms of the license in /doc/license.txt$ */
+
+package edu.cornell.mannlib.vitro.webapp;
+
+import static org.junit.Assert.fail;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.servlet.Filter;
+import javax.servlet.ServletContextListener;
+import javax.servlet.http.HttpServlet;
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.filefilter.IOFileFilter;
+import org.apache.commons.io.filefilter.NameFileFilter;
+import org.apache.commons.io.filefilter.NotFileFilter;
+import org.apache.commons.lang.StringUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
+
+import com.sun.net.httpserver.HttpServer;
+
+import edu.cornell.mannlib.vitro.testing.AbstractTestClass;
+
+/**
+ * Check to see that web.xml doesn't include any constructs that are permitted
+ * by Tomcat but prohibited by the Servlet 2.4 Specification.
+ * 
+ * These are things that might not be noticed when testing Vitro on Tomcat, but
+ * might show up as problems on other containers like GlassFish or WebLogic.
+ * <ul>
+ * <li>
+ * The contents of <dispatcher/> elements must be upper-case. Tomcat permits
+ * lower-case, but the specification does not.</li>
+ * <li>
+ * All <servlet-class/> tags must point to existing classes. Tomcat does not try
+ * to load a servlet until it is necessary to service a request, but WebLogic
+ * loads them on startup. Either method is permitted by the specification.</li>
+ * </ul>
+ * 
+ * As long as we're here, let's check some things that would cause Vitro to fail
+ * in any servlet container.
+ * <ul>
+ * <li>
+ * All <listener-class/> tags must point to existing classes.</li>
+ * <li>
+ * All <filter-class/> tags must point to existing classes.</li>
+ * <li>
+ * All <taglib-location/> tags must point to existing files.</li>
+ * </ul>
+ */
+@RunWith(value = Parameterized.class)
+public class WebXmlTest extends AbstractTestClass {
+	private static final Log log = LogFactory.getLog(WebXmlTest.class);
+
+	@Parameters
+	public static Collection<Object[]> findWebXmlFiles() {
+		IOFileFilter fileFilter = new NameFileFilter("web.xml");
+		IOFileFilter dirFilter = new NotFileFilter(new NameFileFilter(".build"));
+		Collection<File> files = FileUtils.listFiles(new File("."), fileFilter,
+				dirFilter);
+		if (files.isEmpty()) {
+			System.out.println("WARNING: could not find web.xml");
+		} else {
+			if (files.size() > 1) {
+				System.out
+						.println("WARNING: testing more than one web.xml file: "
+								+ files);
+			}
+		}
+
+		Collection<Object[]> parameters = new ArrayList<Object[]>();
+		for (File file : files) {
+			parameters.add(new Object[] { file });
+		}
+		return parameters;
+	}
+
+	private static DocumentBuilder docBuilder = createDocBuilder();
+	private static XPath xpath = createXPath();
+
+	private static DocumentBuilder createDocBuilder() {
+		try {
+			DocumentBuilderFactory factory = DocumentBuilderFactory
+					.newInstance();
+			factory.setNamespaceAware(true); // never forget this!
+			return factory.newDocumentBuilder();
+		} catch (ParserConfigurationException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private static XPath createXPath() {
+		XPath xp = XPathFactory.newInstance().newXPath();
+		xp.setNamespaceContext(new StupidNamespaceContext());
+		return xp;
+	}
+
+	private File webXmlFile;
+	private Document webXmlDoc;
+	private List<String> messages = new ArrayList<String>();
+
+	public WebXmlTest(File file) {
+		this.webXmlFile = file;
+	}
+
+	@Before
+	public void parseWebXml() throws SAXException, IOException {
+		if (webXmlDoc == null) {
+			webXmlDoc = docBuilder.parse(webXmlFile);
+		}
+	}
+
+	@Test
+	public void checkAll() throws IOException {
+		checkDispatcherValues();
+		checkServletClasses();
+		checkListenerClasses();
+		checkFilterClasses();
+		checkTaglibLocations();
+
+		if (!messages.isEmpty()) {
+			for (String message : messages) {
+				System.out.println(message);
+			}
+			fail("Found these problems with '" + webXmlFile.getCanonicalPath()
+					+ "'\n   " + StringUtils.join(messages, "\n   "));
+		}
+	}
+
+	private void checkDispatcherValues() {
+		List<String> okValues = Arrays.asList(new String[] { "FORWARD",
+				"REQUEST", "INCLUDE", "ERROR" });
+		for (Node n : findNodes("//j2ee:dispatcher")) {
+			String text = n.getTextContent();
+			if (!okValues.contains(text)) {
+				messages.add("<dispatcher>" + text
+						+ "</dispatcher> is not valid. Acceptable values are "
+						+ okValues);
+			}
+		}
+	}
+
+	private void checkServletClasses() {
+		for (Node n : findNodes("//j2ee:servlet-class")) {
+			String text = n.getTextContent();
+			String problem = confirmClassNameIsValid(text, HttpServlet.class);
+			if (problem != null) {
+				messages.add("<servlet-class>" + text
+						+ "</servlet-class> is not valid: " + problem);
+			}
+		}
+	}
+
+	private void checkListenerClasses() {
+		for (Node n : findNodes("//j2ee:listener-class")) {
+			String text = n.getTextContent();
+			String problem = confirmClassNameIsValid(text,
+					ServletContextListener.class);
+			if (problem != null) {
+				messages.add("<listener-class>" + text
+						+ "</listener-class> is not valid: " + problem);
+			}
+		}
+	}
+
+	private void checkFilterClasses() {
+		for (Node n : findNodes("//j2ee:filter-class")) {
+			String text = n.getTextContent();
+			String problem = confirmClassNameIsValid(text, Filter.class);
+			if (problem != null) {
+				messages.add("<filter-class>" + text
+						+ "</filter-class> is not valid: " + problem);
+			}
+		}
+	}
+
+	private void checkTaglibLocations() {
+		// TODO Don't know how to do this one. Where do we look for the taglibs?
+	}
+
+	// ----------------------------------------------------------------------
+	// Helper methods
+	// ----------------------------------------------------------------------
+
+	/**
+	 * Search for an Xpath, returning a handy list.
+	 */
+	private List<Node> findNodes(String pattern) {
+		try {
+			XPathExpression xpe = xpath.compile(pattern);
+			NodeList nodes = (NodeList) xpe.evaluate(
+					webXmlDoc.getDocumentElement(), XPathConstants.NODESET);
+			List<Node> list = new ArrayList<Node>();
+			for (int i = 0; i < nodes.getLength(); i++) {
+				list.add(nodes.item(i));
+			}
+			return list;
+		} catch (XPathExpressionException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	/**
+	 * Check that the supplied className can be instantiated with a
+	 * zero-argument constructor, and assigned to a variable of the target
+	 * class.
+	 */
+	private String confirmClassNameIsValid(String className,
+			Class<?> targetClass) {
+		try {
+			Class<?> specifiedClass = Class.forName(className);
+			Object o = specifiedClass.newInstance();
+			if (!targetClass.isInstance(o)) {
+				return specifiedClass.getSimpleName()
+						+ " is not a subclass of "
+						+ targetClass.getSimpleName() + ".";
+			}
+		} catch (ClassNotFoundException e) {
+			return "The class does not exist.";
+		} catch (InstantiationException | IllegalAccessException e) {
+			return "The class does not have a public constructor "
+					+ "that takes zero arguments.";
+		}
+		return null;
+	}
+
+	/**
+	 * Dump the first 20 nodes of an XML context, excluding comments and blank
+	 * text nodes.
+	 */
+	@SuppressWarnings("unused")
+	private int dumpXml(Node xmlNode, int... parms) {
+		int remaining = (parms.length == 0) ? 20 : parms[0];
+		int level = (parms.length < 2) ? 1 : parms[1];
+
+		Node n = xmlNode;
+
+		if (Node.COMMENT_NODE == n.getNodeType()) {
+			return 0;
+		}
+		if (Node.TEXT_NODE == n.getNodeType()) {
+			if (StringUtils.isBlank(n.getTextContent())) {
+				return 0;
+			}
+		}
+
+		int used = 1;
+
+		System.out.println(StringUtils.repeat("-->", level) + n);
+		NodeList nl = n.getChildNodes();
+		for (int i = 0; (i < nl.getLength() && remaining > used); i++) {
+			used += dumpXml(nl.item(i), remaining - used, level + 1);
+		}
+		return used;
+	}
+
+	// ----------------------------------------------------------------------
+	// Helper classes
+	// ----------------------------------------------------------------------
+
+	private static class StupidNamespaceContext implements NamespaceContext {
+		@Override
+		public String getNamespaceURI(String prefix) {
+			if ("j2ee".equals(prefix)) {
+				return "http://java.sun.com/xml/ns/j2ee";
+			} else {
+				throw new UnsupportedOperationException();
+			}
+		}
+
+		@Override
+		public String getPrefix(String namespaceURI) {
+			throw new UnsupportedOperationException();
+		}
+
+		@Override
+		public Iterator<?> getPrefixes(String namespaceURI) {
+			throw new UnsupportedOperationException();
+		}
+	}
+
+}
diff --git a/webapp/web/WEB-INF/web.xml b/webapp/web/WEB-INF/web.xml
index 73ef58a09..8607ea6f9 100644
--- a/webapp/web/WEB-INF/web.xml
+++ b/webapp/web/WEB-INF/web.xml
@@ -122,8 +122,8 @@
   <filter-mapping>
     <filter-name>VitroRequestPrep</filter-name>
     <url-pattern>/*</url-pattern>
-    <dispatcher>request</dispatcher>
-    <dispatcher>forward</dispatcher>
+    <dispatcher>REQUEST</dispatcher>
+    <dispatcher>FORWARD</dispatcher>
   </filter-mapping>
 
   <filter>
@@ -133,7 +133,7 @@
   <filter-mapping>
     <filter-name>PageRoutingFilter</filter-name>
     <url-pattern>/*</url-pattern>
-    <dispatcher>request</dispatcher>
+    <dispatcher>REQUEST</dispatcher>
   </filter-mapping>
 
   <!--  Spring setup ****************************************************  -->
@@ -164,25 +164,6 @@
     
     -->
   <!-- Servlets ********************************************************** -->
-  <servlet>
-    <!--adding only trimSpaces param to defaults to clean up html output-->
-    <servlet-name>jsp</servlet-name>
-    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
-    <init-param>
-      <param-name>fork</param-name>
-      <param-value>false</param-value>
-    </init-param>
-    <init-param>
-      <param-name>xpoweredBy</param-name>
-      <param-value>false</param-value>
-    </init-param>
-    <init-param>
-      <param-name>trimSpaces</param-name>
-      <param-value>true</param-value>
-    </init-param>
-    <load-on-startup>3</load-on-startup>
-  </servlet>
-
   <servlet>
     <servlet-name>IndexController</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.search.controller.IndexController</servlet-class>
@@ -201,15 +182,6 @@
      <url-pattern>/RecomputeInferences</url-pattern>
   </servlet-mapping>
   
-  <servlet>
-     <servlet-name>SDBSetupController</servlet-name>
-     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.freemarker.SDBSetupController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-     <servlet-name>SDBSetupController</servlet-name>
-     <url-pattern>/sdbsetup</url-pattern>
-  </servlet-mapping>
-
   <servlet>
     <servlet-name>MenuManagementEdit</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.MenuManagementEdit</servlet-class>
@@ -228,24 +200,6 @@
     <url-pattern>/ajax/sparqlQuery</url-pattern>    
   </servlet-mapping>
   
-<!-- This is the new navigation controller.  It is not ready for the 1.1 release
-     see http://issues.library.cornell.edu/browse/NIHVIVO-597  
-  <servlet>
-  	<servlet-name>NavigationController</servlet-name>
-  	<servlet-class>edu.cornell.mannlib.vitro.webapp.controller.freemarker.NavigationController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-  	<servlet-name>NavigationController</servlet-name>
-  	<url-pattern>/nav/*</url-pattern>
-  </servlet-mapping>
-  -->
-
-  <servlet>
-    <servlet-name>fetch</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.QueryServlet</servlet-class>
-    <!--load-on-startup>2</load-on-startup-->
-  </servlet>
-
   <servlet>
     <servlet-name>AboutController</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.freemarker.AboutController</servlet-class>
@@ -389,15 +343,6 @@
   	<url-pattern>/editRequestAJAX</url-pattern>
   </servlet-mapping>
 
-  <servlet>
-    <servlet-name>FlagUpdateController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.FlagUpdateController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>FlagUpdateController</servlet-name>
-    <url-pattern>/flagUpdate</url-pattern>
-  </servlet-mapping>
-
   <servlet>
     <servlet-name>RDFUploadFormController</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.jena.RDFUploadFormController</servlet-class>
@@ -452,24 +397,6 @@
     <url-pattern>/jenaXmlFileUpload/*</url-pattern>
   </servlet-mapping>
 
-  <servlet>
-    <servlet-name>OwlImportController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.owl.OwlImportController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>OwlImportController</servlet-name>
-    <url-pattern>/owl</url-pattern>
-  </servlet-mapping>
-
-  <servlet>
-    <servlet-name>OwlImportServlet</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.owl.ProtegeOwlImportServlet</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>OwlImportServlet</servlet-name>
-    <url-pattern>/importOwl</url-pattern>
-  </servlet-mapping>
-
   <servlet>
     <servlet-name>JenaAdminServlet</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.jena.JenaAdminActions</servlet-class>
@@ -569,16 +496,6 @@
     <url-pattern>/datapropEdit</url-pattern>
   </servlet-mapping>
 
-  <servlet>
-
-    <servlet-name>KeywordEditController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.KeywordEditController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>KeywordEditController</servlet-name>
-    <url-pattern>/keywordEdit</url-pattern>
-  </servlet-mapping>
-
   <servlet>
     <servlet-name>OntologyEditController</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.OntologyEditController</servlet-class>
@@ -777,24 +694,6 @@
     <url-pattern>/admin/wait</url-pattern>
   </servlet-mapping>
 
-  <servlet>
-    <servlet-name>StatementChangeListingController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.listing.jena.StatementChangeListingController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>StatementChangeListingController</servlet-name>
-    <url-pattern>/statementHistory</url-pattern>
-  </servlet-mapping>
-
-  <servlet>
-    <servlet-name>WriteOutChangesController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.listing.jena.WriteOutChangesController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>WriteOutChangesController</servlet-name>
-    <url-pattern>/writeOutChanges</url-pattern>
-  </servlet-mapping>
-
   <servlet>
     <servlet-name>ListVClassWebappsController</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.freemarker.ListVClassWebappsController</servlet-class>
@@ -957,15 +856,6 @@
     <url-pattern>/edit/reorder</url-pattern>
   </servlet-mapping>
     
-  <servlet>
-    <servlet-name>AdminController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.AdminController</servlet-class>
-  </servlet>
-  <servlet-mapping>
-    <servlet-name>AdminController</servlet-name>
-    <url-pattern>/adminCon</url-pattern>
-  </servlet-mapping>
-
   <servlet>
     <servlet-name>TermsOfUseController</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.freemarker.TermsOfUseController</servlet-class>
@@ -1105,32 +995,6 @@
     <url-pattern>/browse</url-pattern>
   </servlet-mapping>
   
-  <servlet>
-    <servlet-name>pubsbyorg</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.vclass.PubsByDepartmentServlet</servlet-class>
-    <init-param>
-      <param-name>workspaceDir</param-name>
-      <param-value>/usr/local/services/vivo/logs</param-value>
-    </init-param>
-    <!--load-on-startup>2</load-on-startup-->
-  </servlet>
-
-  <servlet>
-    <servlet-name>coauthors</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.vclass.CoAuthorServlet</servlet-class>
-    <init-param>
-      <param-name>workspaceDir</param-name>
-      <param-value>/usr/local/services/vivo/logs</param-value>
-    </init-param>
-    <!--load-on-startup>2</load-on-startup-->
-  </servlet>
-
-  <servlet>
-    <servlet-name>generic_create</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.GenericDBCreate</servlet-class>
-    <!--load-on-startup>2</load-on-startup-->
-  </servlet>
-
   <servlet>
     <servlet-name>serveFiles</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.filestorage.serving.FileServingServlet</servlet-class>
@@ -1140,21 +1004,6 @@
     <url-pattern>/file/*</url-pattern>
   </servlet-mapping>
 
-  <servlet>
-    <servlet-name>generic_editprep</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.GenericDBEditPrep</servlet-class>
-  </servlet>
-
-  <servlet>
-    <servlet-name>generic_update</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.GenericDBUpdate</servlet-class>
-  </servlet>
-
-  <servlet>
-    <servlet-name>generic_delete</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.GenericDBDelete</servlet-class>
-  </servlet>
-
   <servlet>
     <servlet-name>SparqlQuery</servlet-name>
     <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.SparqlQueryServlet</servlet-class>
@@ -1165,16 +1014,6 @@
     <url-pattern>/admin/sparqlquery</url-pattern>
   </servlet-mapping>
   
-  <servlet>
-    <servlet-name>VisualizationController</servlet-name>
-    <servlet-class>edu.cornell.mannlib.vitro.webapp.controller.visualization.VisualizationController</servlet-class>
-  </servlet>
-
-  <servlet-mapping>
-    <servlet-name>VisualizationController</servlet-name>
-    <url-pattern>/visualization</url-pattern>
-  </servlet-mapping>
-
   <servlet>
   	<servlet-name>primitiveRdfEdit</servlet-name>
   	<servlet-class>edu.cornell.mannlib.vitro.webapp.controller.edit.PrimitiveRdfEdit</servlet-class>  	
@@ -1194,10 +1033,6 @@
   </servlet-mapping>
    
   <!-- ============================== servlet-mappings ======================== -->
-  <servlet-mapping>
-    <servlet-name>fetch</servlet-name>
-    <url-pattern>/fetch</url-pattern>
-  </servlet-mapping>
    <servlet-mapping>
     <servlet-name>mailusers</servlet-name>
     <url-pattern>/mailusers</url-pattern>
@@ -1256,22 +1091,6 @@
     <servlet-name>coauthors</servlet-name>
     <url-pattern>/coauthors</url-pattern>
   </servlet-mapping>
-  <servlet-mapping>
-    <servlet-name>generic_create</servlet-name>
-    <url-pattern>/generic_create</url-pattern>
-  </servlet-mapping>
-  <servlet-mapping>
-    <servlet-name>generic_editprep</servlet-name>
-    <url-pattern>/generic_editprep</url-pattern>
-  </servlet-mapping>
-  <servlet-mapping>
-    <servlet-name>generic_update</servlet-name>
-    <url-pattern>/generic_update</url-pattern>
-  </servlet-mapping>
-  <servlet-mapping>
-    <servlet-name>generic_delete</servlet-name>
-    <url-pattern>/generic_delete</url-pattern>
-  </servlet-mapping>
 
   <!-- ==================== sparql query builder ==================== -->