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app.py
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app.py
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import logging
import os
import random
import subprocess
import time
import uuid
from contextlib import asynccontextmanager
import binascii
import httpx
import redis.asyncio as redis
from asgi_correlation_id import CorrelationIdMiddleware
from dotenv import load_dotenv
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware
from fastapi.responses import HTMLResponse, JSONResponse
from fastapi_limiter import FastAPILimiter
from fastapi_utils.tasks import repeat_every
from starlette.middleware.sessions import SessionMiddleware
from _auth import authRoute
from _cronjobs import keepMySQLAlive, keerRedisAlive, pushTaskExecQueue
from _crypto import cryptoRouter, init_crypto
from _db import init_db, test_db_connection
from _redis import get_keys_by_pattern, redis_client, set_key as redis_set_key
from _search import searchRouter
from _trend import trendingRoute
from _user import userRoute
load_dotenv()
loglevel = os.getenv("LOG_LEVEL", "ERROR")
logging.basicConfig(level=logging.getLevelName(loglevel))
logger = logging.getLogger(__name__)
instanceID = uuid.uuid4().hex
@repeat_every(seconds=60 * 3, wait_first=True)
async def registerInstance():
"""
注册实例
:return:
"""
try:
await redis_set_key(f"node:{instanceID}", str(int(time.time())), 60 * 3) # re-register every 3 minutes
except Exception as e:
logger.error(f"Failed to register instance: {e}", exc_info=True)
exit(-1)
return True
def is_valid_uuid4(uuid_string: str) -> bool:
"""
检查是否是有效的 UUID4
"""
try:
uuid.UUID(uuid_string, version=4)
except ValueError:
return False
return True
async def getLiveInstances():
"""
获取活跃实例
:return:
"""
try:
f = await get_keys_by_pattern("node:*")
return f
except Exception as e:
logger.error(f"Failed to get live instances: {e}", exc_info=True)
return []
@repeat_every(seconds=60 * 60, wait_first=True)
async def testPushServer():
"""
测试推送服务器
"""
baseURL = os.getenv("PUSH_SERVER_URL", "").replace("https://", "").replace("http://", "")
if not baseURL:
return
async with httpx.AsyncClient() as client:
f = await client.get(f"https://{baseURL}/healthz")
if f.status_code == 200:
await redis_set_key("server_status", "running")
@asynccontextmanager
async def lifespan(_: FastAPI):
"""
整个 FastAPI 生命周期的上下文管理器
:param _: FastAPI 实例
:return: None
:param _:
:return:
"""
redis_connection = redis.from_url(
f"redis://default:{os.getenv('REDIS_PASSWORD', '')}@{os.getenv('REDIS_HOST', 'localhost')}:{os.getenv('REDIS_PORT', 6379)}")
await FastAPILimiter.init(redis_connection)
test = await redis_connection.ping()
if test:
logger.info("Redis connection established")
# await redis_connection.flush db()
if os.getenv("MYSQL_CONN_STRING"):
await init_db()
logger.info("MySQL connection established")
await testPushServer()
await registerInstance()
print("Instance registered", instanceID)
await pushTaskExecQueue()
await keerRedisAlive()
await keepMySQLAlive()
await init_crypto()
yield
await FastAPILimiter.close()
await redis_client.connection_pool.disconnect()
print("Instance unregistered", instanceID)
print("graceful shutdown")
# 禁用 openapi.json
app = FastAPI(lifespan=lifespan, title="Anime API", version="1.1.3.beta", openapi_url=None)
app.include_router(authRoute)
app.include_router(userRoute)
app.include_router(searchRouter)
app.include_router(trendingRoute)
app.include_router(cryptoRouter)
@app.middleware("http")
async def instance_id_header_middleware(request, call_next):
"""
添加 Instance ID 到响应头
:param request:
:param call_next:
:return:
"""
response = await call_next(request)
response.headers["X-Instance-ID"] = instanceID
return response
@app.get('/test')
async def test():
"""
测试接口
:return:
"""
f = await get_keys_by_pattern("node:*")
return f
@app.get('/')
async def index():
"""
首页
:return:
"""
version_suffix = os.getenv("COMMIT_ID", "")[:8]
info = {
"version": "v1.1.4-" + version_suffix,
"build_at": os.environ.get("BUILD_AT", ""),
"author": "binaryYuki <noreply.tzpro.xyz>",
"arch": subprocess.run(['uname', '-m'], stdout=subprocess.PIPE).stdout.decode().strip(),
"commit": os.getenv("COMMIT_ID", ""),
"instance_id": instanceID,
}
# 转为 pre defined html
html = """
<pre>
<code>
Version: {version}
Build At: {build_at}
Author: {author}
Arch: {arch}
Commit: {commit}
Instance ID: {instance_id}
</code>
</pre>
""".format(**info)
return HTMLResponse(content=html)
@app.api_route('/healthz', methods=['GET'])
async def healthz():
"""
健康检查
:return:
"""
try:
await redis_client.ping()
redisStatus = True
except Exception as e:
redisStatus = False
logging.error("Redis error: %s", str(e))
# check mysql connection
try:
await test_db_connection()
mysqlStatus = True
except ConnectionError as e:
mysqlStatus = False
logging.error("MySQL connection error: %s", str(e))
except Exception as e:
mysqlStatus = False
logging.error("MySQL error: %s", str(e))
try:
live_servers = await getLiveInstances()
except Exception as e:
print(f"Error getting live servers: {e}")
live_servers = []
if redisStatus and mysqlStatus and live_servers:
return JSONResponse(content={"status": "ok", "redis": redisStatus, "mysql": mysqlStatus,
"live_servers": live_servers})
else:
return JSONResponse(content={"status": "error", "redis": redisStatus, "mysql": mysqlStatus,
"redis_hint": "An error occurred" if not redisStatus else "",
"mysql_hint": "An error occurred" if not mysqlStatus else "",
"live_servers": live_servers})
@app.middleware("http")
async def add_process_time_header(request, call_next):
"""
添加处理时间到响应头
:param request:
:param call_next:
:return:
"""
start_time = time.time()
response = await call_next(request)
process_time = time.time() - start_time
# round it to 3 decimal places and add the unit which is seconds
process_time = round(process_time, 3)
response.headers["X-Process-Time"] = str(process_time) + "s"
return response
secret_key = os.environ.get("SESSION_SECRET")
if not secret_key:
secret_key = binascii.hexlify(random.randbytes(16)).decode('utf-8')
# noinspection PyTypeChecker
app.add_middleware(SessionMiddleware, secret_key=secret_key,
session_cookie='session', max_age=60 * 60 * 12, same_site='lax', https_only=True)
# noinspection PyTypeChecker
app.add_middleware(GZipMiddleware, minimum_size=1000)
if os.getenv("DEBUG", "false").lower() == "false":
# noinspection PyTypeChecker
app.add_middleware(
CORSMiddleware,
allow_origin_regex=r'^https?:\/\/(localhost:3000|.*\.tzpro\.xyz|.*\.tzpro\.uk)(\/.*)?$',
allow_credentials=True,
allow_methods=['GET', 'POST', 'OPTIONS'], # options 请求是预检请求,需要单独处理
allow_headers=['Authorization', 'Content-Type', 'Accept', 'Accept-Encoding', 'Accept-Language', 'Origin',
'Referer', 'Cookie', 'User-Agent'],
)
app.add_middleware(
CorrelationIdMiddleware,
header_name='X-Request-ID',
update_request_header=True,
generator=lambda: uuid.uuid4().hex,
validator=is_valid_uuid4,
transformer=lambda a: a,
)
else:
# noinspection PyTypeChecker
app.add_middleware(
CORSMiddleware,
allow_origins=['*'],
allow_credentials=True,
allow_methods=['GET', 'POST', 'OPTIONS', 'PUT'], # options 请求是预检请求,需要单独处理
allow_headers=['Authorization', 'Content-Type', 'Accept', 'Accept-Encoding', 'Accept-Language', 'Origin',
'Referer', 'Cookie', 'User-Agent'],
)
if __name__ == '__main__':
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=8000)