Initial Commit

TIW-HTML-project-taxonomy/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-19">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v9.0">
+		<attributes>
+			<attribute name="owner.project.facets" value="jst.web"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
+	<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/mysql-connector-j-8.0.32.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/thymeleaf-3.0.14.RELEASE.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/slf4j-api-2.0.7.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/slf4j-nop-2.0.7.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/javassist-3.29.0-GA.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/ognl-3.3.4.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/attoparser-2.0.5.RELEASE.jar"/>
+	<classpathentry kind="lib" path="src/main/webapp/WEB-INF/lib/unbescape-1.1.6.RELEASE.jar"/>
+	<classpathentry kind="output" path="build/classes"/>
+</classpath>

TIW-HTML-project-taxonomy/.gitignore

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+/build/

TIW-HTML-project-taxonomy/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>TIW-HTML-project-taxonomy</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.wst.common.project.facet.core.builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.wst.validation.validationbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>
+		<nature>org.eclipse.wst.common.modulecore.ModuleCoreNature</nature>
+		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
+	</natures>
+</projectDescription>

TIW-HTML-project-taxonomy/.settings/.jsdtscope

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry excluding="**/node_modules/*|**/*.min.js|**/bower_components/*" kind="src" path="src/main/webapp"/>
+	<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.WebProject">
+		<attributes>
+			<attribute name="hide" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.baseBrowserLibrary"/>
+	<classpathentry kind="output" path=""/>
+</classpath>

TIW-HTML-project-taxonomy/.settings/org.eclipse.core.resources.prefs

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+eclipse.preferences.version=1
+encoding/<project>=UTF-8

TIW-HTML-project-taxonomy/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=19
+org.eclipse.jdt.core.compiler.compliance=19
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=19

TIW-HTML-project-taxonomy/.settings/org.eclipse.wst.common.component

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+<?xml version="1.0" encoding="UTF-8"?><project-modules id="moduleCoreId" project-version="1.5.0">
+    <wb-module deploy-name="TIW-HTML-project-taxonomy">
+        <wb-resource deploy-path="/" source-path="/src/main/webapp" tag="defaultRootSource"/>
+        <wb-resource deploy-path="/WEB-INF/classes" source-path="/src/main/java"/>
+        <property name="context-root" value="TIW-HTML-project-taxonomy"/>
+        <property name="java-output-path" value="/TIW-HTML-project-taxonomy/build/classes"/>
+    </wb-module>
+</project-modules>

TIW-HTML-project-taxonomy/.settings/org.eclipse.wst.common.project.facet.core.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <runtime name="Apache Tomcat v9.0"/>
+  <fixed facet="java"/>
+  <fixed facet="jst.web"/>
+  <fixed facet="wst.jsdt.web"/>
+  <installed facet="java" version="19"/>
+  <installed facet="jst.web" version="4.0"/>
+  <installed facet="wst.jsdt.web" version="1.0"/>
+</faceted-project>

TIW-HTML-project-taxonomy/.settings/org.eclipse.wst.jsdt.ui.superType.container

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+org.eclipse.wst.jsdt.launching.baseBrowserLibrary

TIW-HTML-project-taxonomy/.settings/org.eclipse.wst.jsdt.ui.superType.name

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+Window

TIW-HTML-project-taxonomy/src/main/java/it/polimi/tiw/taxonomy/beans/User.java

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+package it.polimi.tiw.taxonomy.beans;
+
+public class User {
+
+
+	private int id;
+	private String username;
+	private String name;
+	private String surname;
+
+	public int getId() { return id; }
+	public String getUsername() { return username; }
+	public String getName() { return name; }
+	public String getSurname() { return surname; }
+
+	public void setId(int id) { this.id = id; }
+	public void setUsername(String username) { this.username = username; }
+	public void setName(String name) { this.name = name; }
+	public void setSurname(String surname) { this.surname = surname; }
+
+
+
+}

TIW-HTML-project-taxonomy/src/main/java/it/polimi/tiw/taxonomy/controllers/Home.java

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+package it.polimi.tiw.taxonomy.controllers;
+
+import java.io.IOException;
+import java.sql.Connection;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
+
+import it.polimi.tiw.taxonomy.beans.User;
+import it.polimi.tiw.taxonomy.utils.ConnectionHandler;
+import it.polimi.tiw.taxonomy.utils.TemplateEngineManager;
+
+@WebServlet("/home")
+public class Home extends HttpServlet {
+	private static final long serialVersionUID = 1L;
+	private Connection connection = null;
+	private TemplateEngine templateEngine;
+
+    public Home() {
+        super();
+    }
+
+    public void init() throws ServletException   {
+    	ServletContext context = getServletContext();
+    	this.connection = ConnectionHandler.getConnection(context);
+    	this.templateEngine = TemplateEngineManager.getTemplateEngine(context);
+    }
+
+	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		String loginPath = getServletContext().getContextPath() + "/index.html";
+		HttpSession session = request.getSession();
+
+		if(session.isNew() || session.getAttribute("user") == null ) {
+			response.sendRedirect(loginPath);
+			return;
+		}
+
+		User user = (User) session.getAttribute("user");
+		System.out.println(user.getUsername());
+
+	}
+
+}

TIW-HTML-project-taxonomy/src/main/java/it/polimi/tiw/taxonomy/controllers/Login.java

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+package it.polimi.tiw.taxonomy.controllers;
+
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.SQLException;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.WebContext;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
+
+import it.polimi.tiw.taxonomy.beans.User;
+import it.polimi.tiw.taxonomy.dao.UserDAO;
+import it.polimi.tiw.taxonomy.utils.ConnectionHandler;
+import it.polimi.tiw.taxonomy.utils.TemplateEngineManager;
+
+@WebServlet("/login")
+public class Login extends HttpServlet {
+	private static final long serialVersionUID = 1L;
+	private Connection connection = null;
+	private TemplateEngine templateEngine;
+
+    public Login() {
+        super();
+    }
+
+    public void init() throws ServletException {
+    	ServletContext context = getServletContext();
+    	this.connection = ConnectionHandler.getConnection(context);
+    	this.templateEngine = TemplateEngineManager.getTemplateEngine(context);
+    }
+
+
+	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+		String username = null;
+		String password = null;
+
+		try {
+			username = request.getParameter("username");
+			password = request.getParameter("password");
+
+			if (username == null || password == null || username.isBlank() || password.isBlank()) {
+				throw new Exception("Missing or empty credential values");
+			}
+		} catch (Exception e) {
+			response.sendError( HttpServletResponse.SC_BAD_REQUEST ,"Missing credential value.");
+			return;
+		}
+
+
+		UserDAO userdao = new UserDAO(connection);
+		User user = null;
+		try  {
+			user = userdao.checkCredentials(username, password);
+		} catch (SQLException e) {
+			response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Not possible to check credentials.");
+		}
+
+
+		String path;
+		if (user == null  ) {
+			ServletContext context = getServletContext();
+			final WebContext ctx = new WebContext(request, response, context, request.getLocale());
+			ctx.setVariable("errorMsg", "Incorrect username or password");
+			path = "index.html";
+			templateEngine.process(path, ctx, response.getWriter());
+		} else {
+			request.getSession().setAttribute("user", user);
+			path = getServletContext().getContextPath() + "/home";
+			response.sendRedirect(path);;
+		}
+
+	}
+
+	public void destroy() {
+		try {
+			if (connection != null) {
+				connection.close();
+			}
+		} catch (SQLException sqle) {
+		}
+	}
+
+}

TIW-HTML-project-taxonomy/src/main/java/it/polimi/tiw/taxonomy/dao/UserDAO.java

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+package it.polimi.tiw.taxonomy.dao;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import it.polimi.tiw.taxonomy.beans.User;
+
+public class UserDAO {
+	private Connection connection;
+
+	public UserDAO(Connection connection) {
+		this.connection = connection;
+	}
+
+	public User checkCredentials(String username, String password) throws SQLException {
+
+		User user = null;
+		String query = "SELECT * FROM user WHERE username = ? AND password = ?";
+
+		PreparedStatement pstatement = null;
+		ResultSet result = null;
+
+		try {
+			pstatement = connection.prepareStatement(query);
+			pstatement.setString(1, username);
+			pstatement.setString(2, password);
+			result = pstatement.executeQuery();
+			while (result.next()) {
+				user = new User();
+				user.setId(result.getInt("id"));
+				user.setName(result.getString("name"));
+				user.setSurname(result.getString("surname"));
+				user.setUsername(result.getString("username"));
+			}
+		} catch (SQLException e) {
+			throw e;
+		}
+
+		finally {
+			try {
+				if (result != null)
+					result.close();
+			} catch (SQLException e1) {
+				throw e1;
+			}
+			try {
+				if (pstatement != null)
+					pstatement.close();
+			} catch (SQLException e1) {
+				throw e1;
+			}
+		}
+
+		return user;
+
+	}
+
+
+
+}

TIW-HTML-project-taxonomy/src/main/java/it/polimi/tiw/taxonomy/utils/ConnectionHandler.java

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+package it.polimi.tiw.taxonomy.utils;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+import javax.servlet.ServletContext;
+import javax.servlet.UnavailableException;
+
+public class ConnectionHandler {
+
+	public static Connection getConnection(ServletContext context) throws UnavailableException {
+		try {
+			String driver = context.getInitParameter("dbDriver");
+			String url = context.getInitParameter("dbUrl");
+			String user = context.getInitParameter("dbUser");
+			String password = context.getInitParameter("dbPassword");
+			Class.forName(driver);
+			return DriverManager.getConnection(url, user, password);
+		} catch (ClassNotFoundException e) {
+			e.printStackTrace();
+			throw new UnavailableException("Can't load database driver");
+		} catch (SQLException e) {
+			e.printStackTrace();
+			throw new UnavailableException("Couldn't get db connection");
+		}
+	}
+}

TIW-HTML-project-taxonomy/src/main/java/it/polimi/tiw/taxonomy/utils/TemplateEngineManager.java

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+package it.polimi.tiw.taxonomy.utils;
+
+import javax.servlet.ServletContext;
+
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
+
+public class TemplateEngineManager {
+
+
+	public static TemplateEngine getTemplateEngine(ServletContext context) {
+		TemplateEngine templateEngine = new TemplateEngine();
+    	ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(context);
+    	templateResolver.setTemplateMode(TemplateMode.HTML);
+    	templateEngine.setTemplateResolver(templateResolver);
+    	templateResolver.setSuffix(".html");
+    	return templateEngine;
+	}
+
+}