fix super.so proxy

Author: dcposch

apps/daimo-web/src/app/[...topLevelPage]/route.tsx

@@ -22,30 +22,33 @@ export async function GET(request: Request) {
   console.log(`[WEB] got ${res.status} ${res.statusText}, ${resBody.size}b`);
 
   // Rewrite /_next/... URLs to superSo/_next/...
-  const ct = res.headers.get("content-type") || "";
-  let retBody: string | Uint8Array;
-  if (ct.includes("text/html")) {
+  const contentType = res.headers.get("content-type") || "";
+  let retBody: string | ArrayBuffer;
+  if (contentType.includes("text/html")) {
     console.log(`[WEB] rewriting /_next/ URLs in ${upstreamUrl}`);
     const initHtml = await resBody.text();
     retBody = initHtml.replace(/\/_next\//g, `${superSo}/_next/`);
+  } else if (contentType.startsWith("text/")) {
+    retBody = await resBody.text();
   } else {
-    retBody = await resBody.bytes();
+    retBody = await resBody.arrayBuffer();
   }
 
   const headers = new Headers();
   for (const [key, value] of res.headers.entries()) {
     if (key === "content-encoding") continue;
+    if (key === "transfer-encoding") continue;
     if (key.startsWith("x-")) continue;
     headers.set(key, value);
   }
 
-  const bodyLength =
+  const lengthStr =
     typeof retBody === "string"
-      ? new TextEncoder().encode(retBody).byteLength
-      : retBody.byteLength;
-  console.log(`[WEB] response type ${ct || "unknown"}, ${bodyLength}b`);
+      ? `${retBody.length}ch string`
+      : `${retBody.byteLength}b buffer`;
+  console.log(`[WEB] returning ${lengthStr}, ${headers.toString()}`);
 
-  return new Response(retBody as BodyInit, {
+  return new Response(retBody, {
     status: res.status,
     statusText: res.statusText,
     headers,