code: def webui():
      from modules.shared_cmd_options import cmd_opts
  
      launch_api = cmd_opts.api
      initialize.initialize()
  
      from modules import (
          shared,
          ui_tempdir,
          script_callbacks,
          ui,
          progress,
          ui_extra_networks,
      )
  
      while 1:
          if shared.opts.clean_temp_dir_at_start:
              ui_tempdir.cleanup_tmpdr()
              startup_timer.record("cleanup temp dir")
  
          script_callbacks.before_ui_callback()
          startup_timer.record("scripts before_ui_callback")
  
          shared.demo = ui.create_ui()
          startup_timer.record("create ui")
  
          if not cmd_opts.no_gradio_queue:
              shared.demo.queue(64)
  
          gradio_auth_creds = (
              list(initialize_util.get_gradio_auth_creds()) or None
          )
  
          auto_launch_browser = False
          if os.getenv("SD_WEBUI_RESTARTING") != "1":
              if (
                  shared.opts.auto_launch_browser == "Remote"
                  or cmd_opts.autolaunch
              ):
                  auto_launch_browser = True
              elif shared.opts.auto_launch_browser == "Local":
                  auto_launch_browser = not cmd_opts.webui_is_non_local
  
          app, local_url, share_url = shared.demo.launch(
              share=cmd_opts.share,
              server_name=initialize_util.gradio_server_name(),
              server_port=cmd_opts.port,
              ssl_keyfile=cmd_opts.tls_keyfile,
              ssl_certfile=cmd_opts.tls_certfile,
              ssl_verify=cmd_opts.disable_tls_verify,
              debug=cmd_opts.gradio_debug,
              auth=gradio_auth_creds,
              inbrowser=auto_launch_browser,
              prevent_thread_lock=True,
              allowed_paths=cmd_opts.gradio_allowed_path,
              app_kwargs={
                  "docs_url": "/docs",
                  "redoc_url": "/redoc",
              },
              root_path=f"/{cmd_opts.subpath}"
              if cmd_opts.subpath
              else "",
          )
  
          startup_timer.record("gradio launch")
  
          # gradio uses a very open CORS policy via app.user_middleware, which makes it possible for
          # an attacker to trick the user into opening a malicious HTML page, which makes a request to the
          # running web ui and do whatever the attacker wants, including installing an extension and
          # running its code. We disable this here. Suggested by RyotaK.
          app.user_middleware = [
              x
              for x in app.user_middleware
              if x.cls.__name__ != "CORSMiddleware"
          ]
  
          initialize_util.setup_middleware(app)
  
          progress.setup_progress_api(app)
          ui.setup_ui_api(app)
  
          if launch_api:
              create_api(app)
  
          ui_extra_networks.add_pages_to_demo(app)
  
          startup_timer.record("add APIs")
  
          with startup_timer.subcategory("app_started_callback"):
              script_callbacks.app_started_callback(shared.demo, app)
  
          timer.startup_record = startup_timer.dump()
          print(f"Startup time: {startup_timer.summary()}.")
  
          try:
              while True:
                  server_command = shared.state.wait_for_server_command(
                      timeout=5
                  )
                  if server_command:
                      if server_command in ("stop", "restart"):
                          break
                      else:
                          print(
                              f"Unknown server command: {server_command}"
                          )
          except KeyboardInterrupt:
              print("Caught KeyboardInterrupt, stopping...")
              server_command = "stop"
  
          if server_command == "stop":
              print("Stopping server...")
              # If we catch a keyboard interrupt, we want to stop the server and exit.
              shared.demo.close()
              break
  
          # disable auto launch webui in browser for subsequent UI Reload
          os.environ.setdefault("SD_WEBUI_RESTARTING", "1")
  
          print("Restarting UI...")
          shared.demo.close()
          time.sleep(0.5)
          startup_timer.reset()
          script_callbacks.app_reload_callback()
          startup_timer.record("app reload callback")
          script_callbacks.script_unloaded_callback()
          startup_timer.record("scripts unloaded callback")
          initialize.initialize_rest(reload_script_modules=True)
  
file_path: stable-diffusion-webui/webui.py
imports: from __future__ import annotations
  import os
  import time
  from modules import timer
  from modules import initialize_util
  from modules import initialize
label_desc: Use image node_id 3 for calling a global function with example usage: webui() without return types