From cc723134f7fe4d803bf03ccd9df1d21a77229d3e Mon Sep 17 00:00:00 2001
From: Daniel Lockyer <hi@daniellockyer.com>
Date: Tue, 12 Mar 2024 16:02:54 +0100
Subject: [PATCH] Refactored handle-image-sizes middleware to async-await

- this is much easier to read and reason about
---
 .../web/middleware/handle-image-sizes.js      | 50 +++++++++----------
 1 file changed, 25 insertions(+), 25 deletions(-)

diff --git a/ghost/core/core/frontend/web/middleware/handle-image-sizes.js b/ghost/core/core/frontend/web/middleware/handle-image-sizes.js
index a887cc43423c..f1fdbbb32b6b 100644
--- a/ghost/core/core/frontend/web/middleware/handle-image-sizes.js
+++ b/ghost/core/core/frontend/web/middleware/handle-image-sizes.js
@@ -110,35 +110,35 @@ module.exports = function handleImageSizes(req, res, next) {
         return redirectToOriginal();
     }
 
-    storageInstance.exists(req.url).then((exists) => {
+    storageInstance.exists(req.url).then(async (exists) => {
         if (exists) {
             return;
         }
 
-        return imageSize.getOriginalImagePath(imagePath)
-            .then((storagePath) => {
-                return storageInstance.read({path: storagePath});
-            })
-            .then((originalImageBuffer) => {
-                if (originalImageBuffer.length <= 0) {
-                    throw new NoContentError();
-                }
-                return imageTransform.resizeFromBuffer(originalImageBuffer, {withoutEnlargement: requestUrlFileExtension !== '.svg', ...imageDimensionConfig, format});
-            })
-            .then((resizedImageBuffer) => {
-                return storageInstance.saveRaw(resizedImageBuffer, req.url);
-            });
-    }).then(() => {
-        if (format) {
-            // File extension won't match the new format, so we need to update the Content-Type header manually here
-            // Express JS still uses an out of date mime package, which doesn't support avif
-            res.type(format === 'avif' ? 'image/avif' : format);
-        }
-        next();
-    }).catch(function (err) {
-        if (err.code === 'SHARP_INSTALLATION' || err.code === 'IMAGE_PROCESSING' || err.errorType === 'NoContentError') {
-            return redirectToOriginal();
+        try {
+            const storagePath = await imageSize.getOriginalImagePath(imagePath);
+            const originalImageBuffer = await storageInstance.read({path: storagePath});
+
+            if (originalImageBuffer.length <= 0) {
+                throw new NoContentError();
+            }
+
+            const resizedImageBuffer = await imageTransform.resizeFromBuffer(originalImageBuffer, {withoutEnlargement: requestUrlFileExtension !== '.svg', ...imageDimensionConfig, format});
+
+            await storageInstance.saveRaw(resizedImageBuffer, req.url);
+
+            if (format) {
+                // File extension won't match the new format, so we need to update the Content-Type header manually here
+                // Express JS still uses an out of date mime package, which doesn't support avif
+                res.type(format === 'avif' ? 'image/avif' : format);
+            }
+
+            next();
+        } catch (err) {
+            if (err.code === 'SHARP_INSTALLATION' || err.code === 'IMAGE_PROCESSING' || err.errorType === 'NoContentError') {
+                return redirectToOriginal();
+            }
+            next(err);
         }
-        next(err);
     });
 };