From a9115f29e7ab1b0bc2b505127941d06933007d64 Mon Sep 17 00:00:00 2001
From: tsukumi <tsukumijima@users.noreply.github.com>
Date: Sat, 23 Nov 2024 23:05:57 +0900
Subject: [PATCH] =?UTF-8?q?Fix:=20--host=20=E3=81=AB=20127.0.0.1=20?=
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ref: github.com/VOICEVOX/voicevox_engine/issues/1480
---
 run.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/run.py b/run.py
index f8320943..faa0c2bc 100644
--- a/run.py
+++ b/run.py
@@ -308,6 +308,12 @@ def read_cli_arguments(envs: Envs) -> CLIArgs:
     # args_dict["runtime_dirs"] = args_dict.pop("runtime_dir")
     args_dict["allow_origins"] = args_dict.pop("allow_origin")
 
+    # --host に 127.0.0.1 が指定されたとき、Windows 上で localhost でアクセスした際に
+    # IPv6 でバインドされないことによる接続遅延を防ぐために、代わりに localhost を指定し IPv4 と IPv6 の両方でバインドする
+    # ref: https://github.com/VOICEVOX/voicevox_engine/issues/1480
+    if args_dict["host"] == "127.0.0.1":
+        args_dict["host"] = "localhost"
+
     args = _cli_args_adapter.validate_python(args_dict)
 
     return args