Add basic error checking

pages/api/books.ts

@@ -3,18 +3,30 @@ import sqlite3 from "sqlite3";
 
 const DATABASE_PATH = "catalogue.db";
 
-export default async function getAllBooks(
+export default function getAllBooks(
   request: NextApiRequest,
   response: NextApiResponse
 ) {
+  if (request.method !== "GET") {
+    response.status(405);
+    return;
+  }
+
   const database = new sqlite3.Database(DATABASE_PATH, sqlite3.OPEN_READONLY);
 
-  database.all(
+  try {
-    "SELECT title, authors, isbn FROM books",
+    database.all(
-    (error, rows: SimpleBook[]) => {
+      "SELECT title, authors, isbn FROM books",
-      response.status(200).json(rows);
+      (error: Error | null, rows: SimpleBook[]) => {
-    }
+        if (error) {
-  );
+          throw error;
+        }
+        response.status(200).json(rows);
+      }
+    );
+  } catch (error) {
+    response.status(500);
+  }
 
   database.close();
 }