feat(DevWeb): Add logout endpoint to remove user from session

S2/DevWeb/Projet/src/main/java/uppa/project/servlet/LogoutServlet.java

@@ -0,0 +1,35 @@
+/*
+ * LogoutServlet.java, 20/03/2024
+ * UPPA M1 TI 2023-2024
+ * Pas de copyright, aucun droits
+ */
+
+package uppa.project.servlet;
+
+import com.google.gson.Gson;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@WebServlet(name = "logoutServlet", value = "/logout")
+public class LogoutServlet extends HttpServlet {
+
+  private final Gson gson = new Gson();
+
+  public void init() {
+  }
+
+  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+    if (request.getSession().getAttribute("user") != null) {
+      request.getSession().removeAttribute("user");
+    }
+
+    response.sendRedirect(request.getContextPath() + "/login");
+  }
+
+  public void destroy() {
+  }
+}