From f27baf423b3c9834b94aed13a93a5385813fd7dd Mon Sep 17 00:00:00 2001
From: Mark Duckworth <1124037+MarkDuckworth@users.noreply.github.com>
Date: Thu, 26 Oct 2023 18:31:17 -0600
Subject: [PATCH] Rolling back the use of useFetchStreams, which has lead to
 hanging queries. (#7729)

* Rolling back the use of useFetchStreams, which has lead to hanging queries.
---
 .changeset/real-ants-notice.md                              | 5 +++++
 .../firestore/src/platform/browser/webchannel_connection.ts | 6 ++++--
 2 files changed, 9 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/real-ants-notice.md

diff --git a/.changeset/real-ants-notice.md b/.changeset/real-ants-notice.md
new file mode 100644
index 00000000000..e0510bf2dfc
--- /dev/null
+++ b/.changeset/real-ants-notice.md
@@ -0,0 +1,5 @@
+---
+"@firebase/firestore": patch
+---
+
+Rolling back the use of useFetchStreams, which has lead to hanging and incomplete queries.
diff --git a/packages/firestore/src/platform/browser/webchannel_connection.ts b/packages/firestore/src/platform/browser/webchannel_connection.ts
index 05cd79ecf9e..7871482bee2 100644
--- a/packages/firestore/src/platform/browser/webchannel_connection.ts
+++ b/packages/firestore/src/platform/browser/webchannel_connection.ts
@@ -27,7 +27,8 @@ import {
   EventTarget,
   StatEvent,
   Event,
-  Stat
+  Stat,
+  FetchXmlHttpFactory
 } from '@firebase/webchannel-wrapper';
 
 import { Token } from '../../api/credentials';
@@ -208,7 +209,8 @@ export class WebChannelConnection extends RestConnection {
     }
 
     if (this.useFetchStreams) {
-      request.useFetchStreams = true;
+      // TODO(b/307942499): switch to `useFetchStreams` once WebChannel is fixed.
+      request.xmlHttpFactory = new FetchXmlHttpFactory({});
     }
 
     this.modifyHeadersForRequest(