Set HTTP status 500 when site is unavailable

Keith R. Gustafson · Keith R. Gustafson · commit 572b513ce416 · 2022-08-29T09:19:05.000-07:00
When the site is down, it shows an error message but the HTTP code is the
default of 200. This is a problem for load balancers seeing the application
as healthy when it is not.
diff --git a/gemini/src/main/java/com/techempower/gemini/GeminiApplication.java b/gemini/src/main/java/com/techempower/gemini/GeminiApplication.java
@@ -1139,6 +1139,7 @@ protected void handleRequest(Context context)
   private void handleError(Context context, String error) throws IOException
   {
     context.setContentType("text/html");
+    context.setStatus(500);
     final Writer writer = context.getWriter();
     writer.write("<html>");
     writer.write("<head><title>Temporarily Unavailable</title>");

Original file line number	Diff line number	Diff line change
`@@ -1139,6 +1139,7 @@ protected void handleRequest(Context context)`
`1139`	`1139`	`private void handleError(Context context, String error) throws IOException`
`1140`	`1140`	`{`
`1141`	`1141`	`context.setContentType("text/html");`
	`1142`	`+ context.setStatus(500);`
`1142`	`1143`	`final Writer writer = context.getWriter();`
`1143`	`1144`	`writer.write("<html>");`
`1144`	`1145`	`writer.write("<head><title>Temporarily Unavailable</title>");`