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Open-LLM-VTuber Server
========================
This module contains the WebSocket server for Open-LLM-VTuber, which handles
the WebSocket connections, serves static files, and manages the web tool.
It uses FastAPI for the server and Starlette for static file serving.
"""
import os
import shutil
from fastapi import FastAPI
from starlette.middleware.cors import CORSMiddleware
from starlette.responses import Response
from starlette.staticfiles import StaticFiles as StarletteStaticFiles
from .routes import init_client_ws_route, init_webtool_routes, init_proxy_route
from .service_context import ServiceContext
from .config_manager.utils import Config
from .openllm_vtuber_main import OpenLLMVTuberMain
# Create a custom StaticFiles class that adds CORS headers
class CORSStaticFiles(StarletteStaticFiles):
"""
Static files handler that adds CORS headers to all responses.
Needed because Starlette StaticFiles might bypass standard middleware.
"""
async def get_response(self, path: str, scope):
response = await super().get_response(path, scope)
# Add CORS headers to all responses
response.headers["Access-Control-Allow-Origin"] = "*"
response.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
response.headers["Access-Control-Allow-Headers"] = "*"
if path.endswith(".js"):
response.headers["Content-Type"] = "application/javascript"
return response
class AvatarStaticFiles(CORSStaticFiles):
"""
Avatar files handler with security restrictions and CORS headers
"""
async def get_response(self, path: str, scope):
allowed_extensions = (".jpg", ".jpeg", ".png", ".gif", ".svg")
if not any(path.lower().endswith(ext) for ext in allowed_extensions):
return Response("Forbidden file type", status_code=403)
response = await super().get_response(path, scope)
return response
class WebSocketServer:
"""
API server for Open-LLM-VTuber. This contains the websocket endpoint for the client, hosts the web tool, and serves static files.
Creates and configures a FastAPI app, registers all routes
(WebSocket, web tools, proxy) and mounts static assets with CORS.
Args:
config (Config): Application configuration containing system settings.
default_context_cache (ServiceContext, optional):
Pre‑initialized service context for sessions' service context to reference to.
**If omitted, `initialize()` method needs to be called to load service context.**
Notes:
- If default_context_cache is omitted, call `await initialize()` to load service context cache.
- Use `clean_cache()` to clear and recreate the local cache directory.
"""
def __init__(self, config: Config, default_context_cache: ServiceContext = None):
self.app = FastAPI(title="Open-LLM-VTuber Server") # Added title for clarity
self.config = config
self.vtuber_main = None
self.is_ready = False
self.default_context_cache = (
default_context_cache or ServiceContext()
) # Use provided context or initialize a new empty one waiting to be loaded
# It will be populated during the initialize method call
# Add global CORS middleware
self.app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
# The context will be populated during the initialize step
self.app.include_router(
init_client_ws_route(default_context_cache=self.default_context_cache, server_instance=self)
)
# Initialize and include proxy routes if proxy is enabled
system_config = config.system_config
if hasattr(system_config, "enable_proxy") and system_config.enable_proxy:
# Construct the server URL for the proxy
host = system_config.host
port = system_config.port
server_url = f"ws://{host}:{port}/client-ws"
self.app.include_router(
init_proxy_route(server_url=server_url),
)
# Mount cache directory first (to ensure audio file access)
if not os.path.exists("cache"):
os.makedirs("cache")
# Always ensure all required sing subdirectories exist
os.makedirs("sing/original", exist_ok=True)
os.makedirs("sing/tracks", exist_ok=True)
self.app.mount(
"/cache",
CORSStaticFiles(directory="cache"),
name="cache",
)
# Mount static files with CORS-enabled handlers
self.app.mount(
"/live2d-models",
CORSStaticFiles(directory="live2d-models"),
name="live2d-models",
)
self.app.mount(
"/bg",
CORSStaticFiles(directory="backgrounds"),
name="backgrounds",
)
self.app.mount(
"/avatars",
AvatarStaticFiles(directory="avatars"),
name="avatars",
)
self.app.mount(
"/sing/tracks",
CORSStaticFiles(directory="sing/tracks"),
name="sing_tracks"
)
# Mount web tool directory separately from frontend
self.app.mount(
"/web-tool",
CORSStaticFiles(directory="web_tool", html=True),
name="web_tool",
)
# Mount main frontend last (as catch-all)
self.app.mount(
"/",
CORSStaticFiles(directory="frontend", html=True),
name="frontend",
)
self.is_ready = False
async def initialize(self):
"""Asynchronously load the service context and VTuber Main logic."""
import asyncio
from loguru import logger
import traceback
await self.default_context_cache.load_from_config(self.config)
try:
configs_dict = self.config.model_dump()
except:
configs_dict = vars(self.config)
# --- ĐOẠN SỬA LỖI: Tự động map persona_prompt sang system_prompt ---
if isinstance(configs_dict, dict):
char_cfg = configs_dict.get('character_config', {})
# 1. Nếu system_prompt trống nhưng persona_prompt có dữ liệu, thì lấy persona_prompt
if char_cfg.get('system_prompt') is None:
char_cfg['system_prompt'] = char_cfg.get('persona_prompt', "")
# 2. Đảm bảo các chuỗi quan trọng không bao giờ là None để tránh lỗi +=
keys_to_fix = [
'system_prompt', 'personality', 'instruction',
'system_with_tools', 'name', 'background'
]
for key in keys_to_fix:
if key in char_cfg and char_cfg[key] is None:
char_cfg[key] = ""
# Kiểm tra cả ở cấp ngoài nếu có
if key in configs_dict and configs_dict[key] is None:
configs_dict[key] = ""
# -----------------------------------------------------------------
try:
self.vtuber_main = OpenLLMVTuberMain(
configs=configs_dict,
loop=asyncio.get_running_loop()
)
self.is_ready = True
logger.info("✅ VTuber Main Logic initialized and Ready.")
except Exception as e:
self.is_ready = False
logger.error(f"❌ Failed to initialize VTuber Main: {e}")
logger.error(traceback.format_exc())
@staticmethod
def clean_cache():
"""Clean the cache directory by removing and recreating it."""
cache_dir = "cache"
if os.path.exists(cache_dir):
shutil.rmtree(cache_dir)
os.makedirs(cache_dir)
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