Add generic error page with stack trace

Add a @ControllerAdvice that catches all exceptions and renders an error page showing status, error type, message, and full stack trace in a <pre> block. Uses table-based layout consistent with the rest of the UI. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-02-27 08:04:48 +01:00
parent 2d74b000c4
commit 8b5bdc0043
3 changed files with 89 additions and 0 deletions
@@ -0,0 +1,29 @@
+package be.seeseepuff.webgit.controller;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.servlet.ModelAndView;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+@ControllerAdvice
+public class ErrorController
+{
+	@ExceptionHandler(Exception.class)
+	public ModelAndView handleException(HttpServletRequest request, Exception ex)
+	{
+		StringWriter sw = new StringWriter();
+		ex.printStackTrace(new PrintWriter(sw));
+
+		ModelAndView mav = new ModelAndView("error");
+		mav.addObject("status", HttpStatus.INTERNAL_SERVER_ERROR.value());
+		mav.addObject("error", HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase());
+		mav.addObject("message", ex.getMessage());
+		mav.addObject("trace", sw.toString());
+		mav.setStatus(HttpStatus.INTERNAL_SERVER_ERROR);
+		return mav;
+	}
+}
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Error</title>
+</head>
+<body>
+<h1>Error</h1>
+<table border="1" cellpadding="4" cellspacing="0">
+    <tr>
+        <td><b>Status</b></td>
+        <td th:text="${status}">500</td>
+    </tr>
+    <tr>
+        <td><b>Error</b></td>
+        <td th:text="${error}">Internal Server Error</td>
+    </tr>
+    <tr>
+        <td><b>Message</b></td>
+        <td th:text="${message}">Something went wrong</td>
+    </tr>
+</table>
+<h2>Stack Trace</h2>
+<pre th:text="${trace}">No stack trace available.</pre>
+<br/>
+<a href="/" target="_top">Back to home</a>
+</body>
+</html>