125 lines
4.0 KiB
Python
125 lines
4.0 KiB
Python
# 开发服务器，用于在不构建vite应用的情况下仍然像生产环境中那样使用相对路径调用api，兼容Vite HMR
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# 如果出现Bug请注意先检查是不是proxy导致的问题，再检查是不是代码写错了！！！
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import asyncio
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import aiohttp
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from aiohttp import web
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import logging
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# 全局变量配置
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VITE_ADD = "http://localhost:5173"
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PY_ADD = "http://127.0.0.1:5000"
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PORT = 8080
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger("dev_proxy")
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async def proxy_handler(request):
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path = request.path
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query = request.query_string
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method = request.method
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headers = dict(request.headers)
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# 判定转发目标
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if path.startswith('/api/'):
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target_url = f"{PY_ADD}{path}"
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else:
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target_url = f"{VITE_ADD}{path}"
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if query:
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target_url += f"?{query}"
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# 处理 WebSocket 升级请求 (Vite HMR)
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if request.headers.get('Upgrade', '').lower() == 'websocket':
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return await ws_proxy_handler(request, target_url)
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try:
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async with aiohttp.ClientSession() as session:
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# 读取请求体
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data = await request.read()
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async with session.request(
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method=method,
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url=target_url,
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headers=headers,
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data=data,
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allow_redirects=False
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) as resp:
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# 构建响应头
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resp_headers = dict(resp.headers)
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# 读取响应体
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body = await resp.read()
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return web.Response(
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body=body,
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status=resp.status,
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headers=resp_headers
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)
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except Exception as e:
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logger.error(f"Error proxying {method} {path}: {e}")
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return web.Response(text=str(e), status=502)
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async def ws_proxy_handler(request, target_url):
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"""处理 WebSocket 转发，主要用于 Vite HMR"""
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# 将 http:// 转换为 ws://
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ws_target_url = target_url.replace('http://', 'ws://').replace('https://', 'wss://')
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# 获取并转发 WebSocket 子协议
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protocol = request.headers.get('Sec-WebSocket-Protocol', '')
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protocols = [p.strip() for p in protocol.split(',')] if protocol else []
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ws_server = web.WebSocketResponse(protocols=protocols)
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await ws_server.prepare(request)
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logger.info(f"WebSocket connection upgraded: {request.path} (Protocols: {protocols})")
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async with aiohttp.ClientSession() as session:
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async with session.ws_connect(ws_target_url, protocols=protocols) as ws_client:
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async def forward(src, dst):
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async for msg in src:
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if msg.type == aiohttp.WSMsgType.TEXT:
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await dst.send_str(msg.data)
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elif msg.type == aiohttp.WSMsgType.BINARY:
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await dst.send_bytes(msg.data)
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elif msg.type == aiohttp.WSMsgType.CLOSE:
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await dst.close()
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break
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elif msg.type == aiohttp.WSMsgType.ERROR:
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break
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# 双向转发
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await asyncio.gather(
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forward(ws_server, ws_client),
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forward(ws_client, ws_server)
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)
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return ws_server
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async def main():
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app = web.Application()
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# 捕获所有路径
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app.router.add_route('*', '/{path:.*}', proxy_handler)
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runner = web.AppRunner(app)
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await runner.setup()
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site = web.TCPSite(runner, '127.0.0.1', PORT)
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logger.info(f"Dev Proxy started at http://127.0.0.1:{PORT}")
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logger.info(f"Routing /api/* to {PY_ADD}")
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logger.info(f"Routing others to {VITE_ADD}")
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await site.start()
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# 保持运行
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try:
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while True:
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await asyncio.sleep(3600)
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except KeyboardInterrupt:
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pass
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finally:
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await runner.cleanup()
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if __name__ == "__main__":
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asyncio.run(main())
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