From ae82a770db519323018abd29a690764e9aca3679 Mon Sep 17 00:00:00 2001
From: Andrew Wason <rectalogic@rectalogic.com>
Date: Fri, 4 Aug 2023 11:43:00 -0400
Subject: [PATCH] Handle write_message raising WebSocketClosedError.

Also fix indentation error in htmlfile.py
---
 sockjs/tornado/transports/htmlfile.py  | 2 +-
 sockjs/tornado/transports/websocket.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sockjs/tornado/transports/htmlfile.py b/sockjs/tornado/transports/htmlfile.py
index 8d7fef3..258475f 100644
--- a/sockjs/tornado/transports/htmlfile.py
+++ b/sockjs/tornado/transports/htmlfile.py
@@ -65,7 +65,7 @@ def get(self, session_id):
             return
 
         if CALLBACK_RE.search(callback):
-             self.write('invalid "callback" parameter')
+            self.write('invalid "callback" parameter')
             self.set_status(500)
             self.finish()
             return
diff --git a/sockjs/tornado/transports/websocket.py b/sockjs/tornado/transports/websocket.py
index 287b18f..272c50c 100644
--- a/sockjs/tornado/transports/websocket.py
+++ b/sockjs/tornado/transports/websocket.py
@@ -87,7 +87,7 @@ def send_pack(self, message, binary=False):
         # Send message
         try:
             self.write_message(message, binary)
-        except IOError:
+        except (IOError, websocket.WebSocketClosedError):
             self.server.io_loop.add_callback(self.on_close)
 
     def session_closed(self):