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Add SSE polling support (SEP-1699) (#1654)

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Felix Weinberger 2025-12-02 11:44:49 +00:00 • committed by GitHub
commit 281fd4765e
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1 changed files with 1461 additions and 45 deletions
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8
src/mcp/server/lowlevel/server.py
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@ -713,12 +713,16 @@ class Server(Generic[LifespanResultT, RequestT]):
token = None
try:
# Extract request context from message metadata
# Extract request context and close_sse_stream from message metadata
request_data = None
close_sse_stream_cb = None
close_standalone_sse_stream_cb = None
if message.message_metadata is not None and isinstance(
message.message_metadata, ServerMessageMetadata
): # pragma: no cover
request_data = message.message_metadata.request_context
close_sse_stream_cb = message.message_metadata.close_sse_stream
close_standalone_sse_stream_cb = message.message_metadata.close_standalone_sse_stream
# Set our global state that can be retrieved via
# app.get_request_context()
@ -741,6 +745,8 @@ class Server(Generic[LifespanResultT, RequestT]):
_task_support=task_support,
),
request=request_data,
close_sse_stream=close_sse_stream_cb,
close_standalone_sse_stream=close_standalone_sse_stream_cb,
)
)
response = await handler(req)