Added default favicon creation upon access.

app/Http/Controllers/HomeController.php

@@ -10,6 +10,7 @@
 use BookStack\Entities\Repos\BookRepo;
 use BookStack\Entities\Repos\BookshelfRepo;
 use BookStack\Entities\Tools\PageContent;
+use BookStack\Uploads\FaviconHandler;
 use BookStack\Util\SimpleListOptions;
 use Illuminate\Http\Request;
 
@@ -127,4 +128,15 @@ public function notFound()
     {
         return response()->view('errors.404', [], 404);
     }
+
+    /**
+     * Serve the application favicon.
+     * Ensures a 'favicon.ico' file exists at the web root location (if writable) to be served
+     * directly by the webserver in the future.
+     */
+    public function favicon(FaviconHandler $favicons)
+    {
+        $favicons->restoreOriginalIfNotExists();
+        return response()->file($favicons->getPath());
+    }
 }

app/Uploads/FaviconHandler.php

@@ -7,18 +7,20 @@
 
 class FaviconHandler
 {
+    protected string $path;
+
     public function __construct(
         protected ImageManager $imageTool
     ) {
+        $this->path = public_path('favicon.ico');
     }
 
     /**
      * Save the given UploadedFile instance as the application favicon.
      */
     public function saveForUploadedImage(UploadedFile $file): void
     {
-        $targetPath = public_path('favicon.ico');
-        if (!is_writeable($targetPath)) {
+        if (!is_writeable($this->path)) {
             return;
         }
 
@@ -28,21 +30,38 @@ public function saveForUploadedImage(UploadedFile $file): void
         $bmpData = $image->encode('png');
         $icoData = $this->pngToIco($bmpData, 32, 32);
 
-        file_put_contents($targetPath, $icoData);
+        file_put_contents($this->path, $icoData);
     }
 
     /**
      * Restore the original favicon image.
      */
     public function restoreOriginal(): void
     {
-        $targetPath = public_path('favicon.ico');
         $original = public_path('icon.ico');
-        if (!is_writeable($targetPath)) {
+        if (!is_writeable($this->path)) {
             return;
         }
 
-        copy($original, $targetPath);
+        copy($original, $this->path);
+    }
+
+    /**
+     * Restore the original favicon image if no favicon image is already in use.
+     */
+    public function restoreOriginalIfNotExists(): void
+    {
+        if (!file_exists($this->path)) {
+            $this->restoreOriginal();
+        }
+    }
+
+    /**
+     * Get the path to the favicon file.
+     */
+    public function getPath(): string
+    {
+        return $this->path;
     }
 
     /**

routes/web.php

@@ -40,6 +40,7 @@
 
 Route::get('/status', [StatusController::class, 'show']);
 Route::get('/robots.txt', [HomeController::class, 'robots']);
+Route::get('/favicon.ico', [HomeController::class, 'favicon']);
 
 // Authenticated routes...
 Route::middleware('auth')->group(function () {