From 7288d93741d0885b26c92f561e524e6bd887e1e3 Mon Sep 17 00:00:00 2001
From: Danny <dth@taiga.ai>
Date: Sun, 29 Mar 2026 18:58:16 +0200
Subject: [PATCH] =?UTF-8?q?fix(start):=20force=20http2=20protocol=20and=20?=
 =?UTF-8?q?drain=20cloudflared=20output=20=F0=9F=90=9B?=
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QUIC tunnels consistently returned 1033 errors. Forcing http2 fixes it.
Added a daemon thread to drain cloudflared's stdout pipe to prevent
buffer-full blocking that would kill the tunnel.
---
 start.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/start.py b/start.py
index 37cc268..2f6352b 100644
--- a/start.py
+++ b/start.py
@@ -12,6 +12,7 @@ import re
 import signal
 import subprocess
 import sys
+import threading
 import time
 import pathlib
 
@@ -62,7 +63,7 @@ def start_server(port: int, bot_token: str) -> subprocess.Popen:
 def start_tunnel(port: int) -> tuple[subprocess.Popen, str]:
     print(f"  Starting tunnel to port {port}...")
     proc = subprocess.Popen(
-        ["cloudflared", "tunnel", "--url", f"http://localhost:{port}"],
+        ["cloudflared", "tunnel", "--url", f"http://localhost:{port}", "--protocol", "http2"],
         stdout=subprocess.PIPE,
         stderr=subprocess.STDOUT,
         text=True,
@@ -95,6 +96,13 @@ def start_tunnel(port: int) -> tuple[subprocess.Popen, str]:
         print("  Make sure cloudflared is installed: cloudflared tunnel --url http://localhost:8080\n")
         sys.exit(1)
 
+    # Keep draining cloudflared output so its pipe buffer doesn't fill up
+    # (which would block the process and kill the tunnel)
+    def _drain():
+        for line in proc.stdout:
+            pass
+    threading.Thread(target=_drain, daemon=True).start()
+
     return proc, url