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🐛 调整 MCP HTTP 自动检测顺序，防止意外卡住 #28

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FuQuan233 2026-06-29 11:39:55 +08:00
parent bec3fda293
commit 97e82e0c0e
1 changed files with 13 additions and 11 deletions
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24
nonebot_plugin_llmchat/mcpclient.py
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@ -106,26 +106,28 @@ class MCPClient:
sse_client(url=config.url, headers=config.headers)
)
else:
# 未指定协议，自动探测：先尝试 streamable_http，失败则回退到 sse
# 未指定协议，自动探测：先尝试 sse，失败则回退到 streamable_http
# （sse 服务器对 streamable_http 的 POST 请求会卡住，反之 sse 连 streamable_http 服务器会快速返回 405）
logger.debug(f"服务器[{server_name}]未指定传输协议，开始自动探测")
probe_stack = AsyncExitStack()
try:
http_client = await probe_stack.enter_async_context(
httpx.AsyncClient(headers=config.headers or {})
)
read, write, _ = await probe_stack.enter_async_context(
streamable_http_client(url=config.url, http_client=http_client)
read, write = await probe_stack.enter_async_context(
sse_client(url=config.url, headers=config.headers)
)
await session_stack.enter_async_context(probe_stack)
transport = (read, write)
logger.debug(f"服务器[{server_name}]自动探测成功: 使用 streamable_http 传输协议")
logger.debug(f"服务器[{server_name}]自动探测成功: 使用 sse 传输协议")
except Exception as e:
await probe_stack.aclose()
logger.debug(f"服务器[{server_name}]streamable_http 探测失败({e})，回退到 sse")
transport = await session_stack.enter_async_context(
sse_client(url=config.url, headers=config.headers)
logger.debug(f"服务器[{server_name}]sse 探测失败({e})，回退到 streamable_http")
http_client = await session_stack.enter_async_context(
httpx.AsyncClient(headers=config.headers or {})
)
logger.debug(f"服务器[{server_name}]自动探测成功: 使用 sse 传输协议")
read, write, _ = await session_stack.enter_async_context(
streamable_http_client(url=config.url, http_client=http_client)
)
transport = (read, write)
logger.debug(f"服务器[{server_name}]自动探测成功: 使用 streamable_http 传输协议")
elif config.command:
stdio_params: dict[str, Any] = {
"command": config.command,