First Commit. Duplicate bunext-sqlite preset

src/utils/buffer-from-url.ts

@@ -0,0 +1,34 @@
+export default async function bufferFromUrl(
+    url: string,
+): Promise<{ buffer: Buffer; ext: string }> {
+    const res = await fetch(url);
+    if (!res.ok) throw new Error(`Failed to fetch ${url}: ${res.status}`);
+
+    const contentType = res.headers.get("content-type") ?? "";
+    const arrayBuffer = await res.arrayBuffer();
+    const buffer = Buffer.from(arrayBuffer);
+
+    // Derive ext from content-type first, fall back to URL path
+    let ext = "txt";
+    if (contentType.includes("application/pdf")) ext = "pdf";
+    else if (
+        contentType.includes(
+            "application/vnd.openxmlformats-officedocument.wordprocessingml",
+        )
+    )
+        ext = "docx";
+    else if (
+        contentType.includes(
+            "application/vnd.openxmlformats-officedocument.spreadsheetml",
+        )
+    )
+        ext = "xlsx";
+    else if (contentType.includes("text/csv")) ext = "csv";
+    else if (contentType.includes("text/markdown")) ext = "md";
+    else {
+        const urlPath = new URL(url).pathname;
+        ext = urlPath.split(".").pop()?.toLowerCase() ?? "txt";
+    }
+
+    return { buffer, ext };
+}