chore: flush headers for event-stream responses

remix-run · Oct 9, 2023 · d506d4a · d506d4a
1 parent 960511a
commit d506d4a
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diff --git a/.changeset/express-flush-stream-headers.md b/.changeset/express-flush-stream-headers.md
@@ -0,0 +1,5 @@
+---
+"@remix-run/express": patch
+---
+
+Flush headers for text/event-stream responses.
diff --git a/packages/remix-express/server.ts b/packages/remix-express/server.ts
@@ -118,6 +118,10 @@ export async function sendRemixResponse(
     res.append(key, value);
   }
 
+  if (nodeResponse.headers.get("Content-Type")?.match(/text\/event-stream/i)) {
+    res.flushHeaders();
+  }
+
   if (nodeResponse.body) {
     await writeReadableStreamToWritable(nodeResponse.body, res);
   } else {