fix: auto hold don't work on script mode

pywebio/platform/path_deploy.py

@@ -19,6 +19,7 @@
 
 LOCAL_STATIC_URL = '/_pywebio_static'
 
+
 def filename_ok(f):
     return not f.startswith(('.', '_'))
 

pywebio/platform/tornado.py

@@ -397,6 +397,7 @@ def start_server_in_current_thread_session():
     class SingleSessionWSHandler(_webio_handler(cdn=False)):
         session = None
         instance = None
+        closed = False
 
         def open(self):
             self.main_session = False
@@ -426,6 +427,7 @@ def open(self):
         def on_close(self):
             if SingleSessionWSHandler.session is not None and self.main_session:
                 self.session.close()
+                self.closed = True
                 logger.debug('ScriptModeSession closed')
 
     async def wait_to_stop_loop(server):
@@ -439,7 +441,11 @@ async def wait_to_stop_loop(server):
             alive_none_daemonic_thread_cnt = sum(
                 1 for t in threading.enumerate() if t.is_alive() and not t.isDaemon()
             )
-            await asyncio.sleep(1)
+            await asyncio.sleep(0.5)
+
+        if SingleSessionWSHandler.instance.session.need_keep_alive():
+            while not SingleSessionWSHandler.instance.closed:
+                await asyncio.sleep(0.5)
 
         # 关闭Websocket连接
         # Close the Websocket connection

test/2.script_mode.py

@@ -26,13 +26,15 @@ def test(server_proc: subprocess.Popen, browser: Chrome):
 
     template.test_input(browser)
 
-    # script mode 下，此时 server 应停止
-    server_proc.wait(timeout=8)
-
     time.sleep(1)
     template.save_output(browser, '2.script_mode.html',
                          process_func=lambda i: i.replace('::1', '127.0.0.1'))  # because tornado default bind ipv4 and ipv6 in script mode
 
+    browser.close()
+    time.sleep(3)
+
+    # script mode 下，此时 server 应停止
+    server_proc.wait(timeout=8)
 
 if __name__ == '__main__':
     # 设置监听端口，并关闭自动打开浏览器