1 files changed, 15 insertions, 0 deletions
diff --git a/packages/backend/src/misc/detect-url-mime.ts b/packages/backend/src/misc/detect-url-mime.ts
new file mode 100644
index 0000000000..274c291737
--- /dev/null
+++ b/packages/backend/src/misc/detect-url-mime.ts
@@ -0,0 +1,15 @@
+import { createTemp } from './create-temp';
+import { downloadUrl } from './download-url';
+import { detectType } from './get-file-info';
+
+export async function detectUrlMime(url: string) {
+	const [path, cleanup] = await createTemp();
+
+	try {
+		await downloadUrl(url, path);
+		const { mime } = await detectType(path);
+		return mime;
+	} finally {
+		cleanup();
+	}
+}