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Fix leaked anyio streams in streamable_http (#1991)

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Co-authored-by: Marcelo Trylesinski <marcelotryle@gmail.com>
This commit is contained in:
Aaron Abbott 2026-02-11 09:52:07 -05:00 • committed by GitHub
commit f049c8e5c6
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1 changed files with 159 additions and 141 deletions
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4
src/mcp/server/streamable_http_manager.py
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@ -181,7 +181,7 @@ class StreamableHTTPSessionManager:
request_mcp_session_id = request.headers.get(MCP_SESSION_ID_HEADER)
# Existing session case
if request_mcp_session_id is not None and request_mcp_session_id in self._server_instances: # pragma: no cover
if request_mcp_session_id is not None and request_mcp_session_id in self._server_instances:
transport = self._server_instances[request_mcp_session_id]
logger.debug("Session already exists, handling request directly")
await transport.handle_request(scope, receive, send)
@ -261,5 +261,5 @@ class StreamableHTTPASGIApp:
def __init__(self, session_manager: StreamableHTTPSessionManager):
self.session_manager = session_manager
async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None: # pragma: no cover
async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
await self.session_manager.handle_request(scope, receive, send)