#1 -- Add custom error page

build.gradle

@@ -39,8 +39,6 @@ repositories {
 
 configurations {
     compile.exclude module: "spring-boot-starter-tomcat"
-    compile.exclude module: "jquery"
-    compile.exclude module: "popper.js"
     compile.exclude module: "follow-redirects"
     compile.exclude module: "is-buffer"
 }
@@ -49,6 +47,7 @@ dependencies {
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-web'
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-jetty'
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-thymeleaf'
+    compile group: 'nz.net.ultraq.thymeleaf', name: 'thymeleaf-layout-dialect'
     compile group: 'com.fasterxml.jackson.module', name: 'jackson-module-afterburner'
     compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-hibernate5'
 
@@ -57,6 +56,12 @@ dependencies {
     compile group: 'com.ibm.icu', name: 'icu4j', version: '63.1'
     compile group: 'org.eclipse.jgit', name: 'org.eclipse.jgit',  version: '5.9.0.202009080501-r'
 
+    compile group: 'org.webjars', name: 'jquery', version: '3.6.0'
+    compile group: 'org.webjars', name: 'bootstrap', version: '4.6.0'
+    compile group: 'org.webjars', name: 'bootstrap-select', version: '1.13.8'
+    compile group: 'org.webjars', name: 'font-awesome', version: '4.7.0'
+
+
     testCompile group: 'org.springframework.boot', name: 'spring-boot-starter-test'
 }
 

src/main/java/ru/ulstu/extractor/mvc/GlobalDefaultExceptionHandler.java

@@ -0,0 +1,40 @@
+package ru.ulstu.extractor.mvc;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.NoHandlerFoundException;
+
+import javax.servlet.http.HttpServletRequest;
+
+@ControllerAdvice
+class GlobalDefaultExceptionHandler {
+    public static final String DEFAULT_ERROR_VIEW = "error";
+
+    @ExceptionHandler(value = Exception.class)
+    public ModelAndView defaultErrorHandler(HttpServletRequest req, Exception e) {
+        // If the exception is annotated with @ResponseStatus rethrow it and let
+        // the framework handle it - like the OrderNotFoundException example
+        // at the start of this post.
+        // AnnotationUtils is a Spring Framework utility class.
+        /*if (AnnotationUtils.findAnnotation (e.getClass(), ResponseStatus.class) != null) {
+                throw e;
+                }
+                */
+
+        // Otherwise setup and send the user to a default error-view.
+        ModelAndView mav = new ModelAndView();
+        mav.addObject("exception", e);
+        mav.addObject("url", req.getRequestURL());
+        mav.setViewName(DEFAULT_ERROR_VIEW);
+        return mav;
+    }
+
+    @ExceptionHandler(NoHandlerFoundException.class)
+    @ResponseStatus(HttpStatus.NOT_FOUND)
+    public String handle(NoHandlerFoundException ex) {
+        return "DEFAULT_ERROR_VIEW";
+    }
+}

src/main/java/ru/ulstu/extractor/mvc/MvcConfiguration.java

@@ -0,0 +1,23 @@
+package ru.ulstu.extractor.mvc;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class MvcConfiguration implements WebMvcConfigurer {
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        registry.addViewController("/{articlename:\\w+}");
+        registry.addRedirectViewController("/", "/index");
+        registry.addRedirectViewController("/default", "/home");
+    }
+
+    @Override
+    public void addResourceHandlers(ResourceHandlerRegistry registry) {
+        registry
+                .addResourceHandler("/webjars/**")
+                .addResourceLocations("/webjars/");
+    }
+}

src/main/java/ru/ulstu/extractor/mvc/TemplateConfiguration.java

@@ -0,0 +1,19 @@
+package ru.ulstu.extractor.mvc;
+
+import nz.net.ultraq.thymeleaf.LayoutDialect;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.thymeleaf.spring5.SpringTemplateEngine;
+import org.thymeleaf.templateresolver.ITemplateResolver;
+
+@Configuration
+public class TemplateConfiguration {
+
+    @Bean
+    public SpringTemplateEngine templateEngine(ITemplateResolver templateResolver) {
+        final SpringTemplateEngine templateEngine = new SpringTemplateEngine();
+        templateEngine.addTemplateResolver(templateResolver);
+        templateEngine.addDialect(new LayoutDialect());
+        return templateEngine;
+    }
+}

src/main/resources/application.properties

@@ -3,3 +3,5 @@ server.port=8080
 # Available levels are: TRACE, DEBUG, INFO, WARN, ERROR, FATAL, OFF
 logging.level.ru.ulstu=DEBUG
 extractor.custom-projects-dir=
+# Thymeleaf Settings
+spring.thymeleaf.cache=false

src/main/resources/templates/default.html

@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<html lang="ru"
+      xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout">
+<head>
+    <meta charset="UTF-8"/>
+    <title>GitExtractor</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <script type="text/javascript" src="/webjars/jquery/3.6.0/jquery.min.js"></script>
+    <script type="text/javascript" src="/webjars/bootstrap/4.6.0/js/bootstrap.min.js"></script>
+    <script type="text/javascript" src="/webjars/bootstrap-select/1.13.8/js/bootstrap-select.min.js"></script>
+    <link rel="stylesheet" href="/webjars/bootstrap/4.6.0/css/bootstrap.min.css"/>
+    <link rel="stylesheet" href="/webjars/bootstrap-select/1.13.8/css/bootstrap-select.min.css"/>
+    <link rel="stylesheet" href="/webjars/font-awesome/4.7.0/css/font-awesome.min.css"/>
+</head>
+<body>
+<nav class="navbar navbar-expand-lg navbar-light bg-light" layout:fragment="navbar">
+    <a class="navbar-brand" href="#">Navbar</a>
+    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent"
+            aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
+        <span class="navbar-toggler-icon"></span>
+    </button>
+
+    <div class="collapse navbar-collapse" id="navbarSupportedContent">
+        <ul class="navbar-nav mr-auto">
+            <li class="nav-item active">
+                <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link" href="#">Link</a>
+            </li>
+            <li class="nav-item dropdown">
+                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown"
+                   aria-haspopup="true" aria-expanded="false">
+                    Dropdown
+                </a>
+                <div class="dropdown-menu" aria-labelledby="navbarDropdown">
+                    <a class="dropdown-item" href="#">Action</a>
+                    <a class="dropdown-item" href="#">Another action</a>
+                    <div class="dropdown-divider"></div>
+                    <a class="dropdown-item" href="#">Something else here</a>
+                </div>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
+            </li>
+        </ul>
+    </div>
+</nav>
+<div class="wrapper">
+    <div id="sidebar" class="collapse navbar-collapse sidebar-mobile">
+        <ul id="menu" class="list-unstyled">
+        </ul>
+    </div>
+
+    <div id="content">
+        <div id="breadcrumbs" class="container-fluid">
+        </div>
+        <div class="container-fluid">
+            <ul id="messages" class="feedback-panel">
+            </ul>
+        </div>
+        <div layout:fragment="content">
+        </div>
+    </div>
+</div>
+</body>
+</html>

src/main/resources/templates/error.html

@@ -1,53 +1,45 @@
 <!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml"
-      xmlns:th="http://www.thymeleaf.org">
+      xmlns:th="http://www.thymeleaf.org"
+      xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
+      layout:decorate="~{default}">
 
 <!--<head th:substituteby="header :: copy"></head>-->
 
-<body>
+<div class="container" layout:fragment="content">
-<h1>Support Friendly Error Page</h1>
+    <h1>Ошибка</h1>
 
     <!--  As we are using Thymeleaf, you might consider using
           ${#httpServletRequest.requestURL}. But that returns the path
           to this error page.  Hence we explicitly add the url to the
           Model in some of the example code. -->
     <p th:if="${url}">
-    <b>Page:</b> <span th:text="${url}">Page URL</span>
+        <b>Страница:</b> <span th:text="${url}">Page URL</span>
     </p>
 
     <p th:if="${timestamp}" id='created'>
-    <b>Occurred:</b> <span th:text="${timestamp}">Timestamp</span>
+        <b>Время:</b> <span th:text="${timestamp}">Timestamp</span>
     </p>
 
     <p th:if="${status}">
         <b>Response Status:</b> <span th:text="${status}">status-code</span> <span
             th:if="${error}" th:text="'('+${error}+')'">error ...</span>
     </p>
-
+    <p>
-<p th:if="${exception}">
+        <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false"
-    <b>Exception:</b> <span th:text="${exception}">exception</span> <span
+           aria-controls="collapseExample">
+            Показать stack trace
+        </a>
     </p>
-
+    <div class="collapse" id="collapseExample">
-<p>Application has encountered an error. Please contact support on
+        <div class="card card-body">
-    ...</p>
-
-<p>Support may ask you to right click to view page source.</p>
-
-<!--
-  // Hidden Exception Details  - this is not a recommendation, but here is
-  // how you could hide an exception in the page using Thymeleaf
-  -->
-<div th:utext="'&lt;!--'" th:remove="tag"></div>
             <div th:utext="'Failed URL: ' +  ${url}" th:remove="tag">${url}</div>
             <div th:utext="'Exception: ' + ${exception.message}" th:remove="tag">${exception.message}</div>
             <ul th:remove="tag">
                 <li th:each="ste : ${exception.stackTrace}" th:remove="tag"><span
                         th:utext="${ste}" th:remove="tag">${ste}</span></li>
             </ul>
-<div th:utext="'--&gt;'" th:remove="tag"></div>
+        </div>
-
+    </div>
-
+</div>
-<div th:substituteby="footer :: copy"></div>
-
-</body>
 </html>

src/main/resources/templates/index.html

@@ -1,10 +1,12 @@
-<!DOCTYPE HTML>
+<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring4-4.dtd">
-<html xmlns:th="http://www.thymeleaf.org">
+<html xmlns:th="http://www.thymeleaf.org"
+      xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
+      layout:decorate="~{default}">
 <head>
     <title>Простая обработка формы на Spring MVC</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
 </head>
-<body>
+<div class="container" layout:fragment="content">
     <h1>Форма</h1>
     <form action="#" th:action="@{/sendEmail}" th:object="${emailForm}" method="post">
         <p style="color:red" th:text="${error}"></p>
@@ -26,5 +28,5 @@
             </tr>
         </table>
     </form>
-</body>
+</div>
 </html>