Expose inferRemoteSize function

.changeset/large-geese-play.md

@@ -0,0 +1,5 @@
+---
+"astro": minor
+---
+
+Exposes the `inferRemoteSize` function used by `inferSize`

packages/astro/src/assets/index.ts

@@ -1,3 +1,4 @@
 export { getConfiguredImageService, getImage } from './internal.js';
 export { baseService, isLocalService } from './services/service.js';
+export { inferRemoteSize } from './utils/remoteProbe.js';
 export { type LocalImageProps, type RemoteImageProps } from './types.js';

packages/astro/src/assets/internal.ts

@@ -9,7 +9,7 @@ import type {
 	UnresolvedImageTransform,
 } from './types.js';
 import { isESMImportedImage, isRemoteImage, resolveSrc } from './utils/imageKind.js';
-import { probe } from './utils/remoteProbe.js';
+import { inferRemoteSize } from './utils/remoteProbe.js';
 
 export async function getConfiguredImageService(): Promise<ImageService> {
 	if (!globalThis?.astroAsset?.imageService) {
@@ -62,7 +62,7 @@ export async function getImage(
 	// Infer size for remote images if inferSize is true
 	if (options.inferSize && isRemoteImage(resolvedOptions.src)) {
 		try {
-			const result = await probe(resolvedOptions.src); // Directly probe the image URL
+			const result = await inferRemoteSize(resolvedOptions.src); // Directly probe the image URL
 			resolvedOptions.width ??= result.width;
 			resolvedOptions.height ??= result.height;
 			delete resolvedOptions.inferSize; // Delete so it doesn't end up in the attributes
@@ -82,7 +82,7 @@ export async function getImage(
 	// Causing our generate step to think the image is used outside of the image optimization pipeline
 	const clonedSrc = isESMImportedImage(resolvedOptions.src)
 		? // @ts-expect-error - clone is a private, hidden prop
-			resolvedOptions.src.clone ?? resolvedOptions.src
+		resolvedOptions.src.clone ?? resolvedOptions.src
 		: resolvedOptions.src;
 
 	resolvedOptions.src = clonedSrc;

packages/astro/src/assets/utils/index.ts

@@ -12,3 +12,4 @@ export {
 	type RemotePattern,
 } from './remotePattern.js';
 export { hashTransform, propsToFilename } from './transformToPath.js';
+export { inferRemoteSize } from './remoteProbe.js';

packages/astro/src/assets/utils/remoteProbe.ts

@@ -1,7 +1,7 @@
-import { lookup } from './vendor/image-size/lookup.js';
-import type { ISize } from './vendor/image-size/types/interface.ts';
+import type { ImageMetadata } from '../types.js';
+import { imageMetadata } from './metadata.js';
 
-export async function probe(url: string): Promise<ISize> {
+export async function inferRemoteSize(url: string): Promise<Omit<ImageMetadata, 'src' | 'fsPath'>> {
 	// Start fetching the image
 	const response = await fetch(url);
 	if (!response.body || !response.ok) {
@@ -31,13 +31,15 @@ export async function probe(url: string): Promise<ISize> {
 
 			try {
 				// Attempt to determine the size with each new chunk
-				const dimensions = lookup(accumulatedChunks);
+				const dimensions = await imageMetadata(accumulatedChunks, url);
+
 				if (dimensions) {
 					await reader.cancel(); // stop stream as we have size now
+
 					return dimensions;
 				}
 			} catch (error) {
-				// This catch block is specifically for `sizeOf` failures,
+				// This catch block is specifically for `imageMetadata` errors
 				// which might occur if the accumulated data isn't yet sufficient.
 			}
 		}