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Wrap JSONRPC messages with SessionMessage for metadata support (#590)

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This commit is contained in:
ihrpr
2025-05-02 14:29:00 +01:00
committed by GitHub
parent 3978c6e1b9
commit da0cf22355
22 changed files with 286 additions and 173 deletions
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20
src/mcp/client/sse.py
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@@ -10,6 +10,7 @@ from anyio.streams.memory import MemoryObjectReceiveStream, MemoryObjectSendStre
from httpx_sse import aconnect_sse
import mcp.types as types
from mcp.shared.message import SessionMessage
logger = logging.getLogger(__name__)
@@ -31,11 +32,11 @@ async def sse_client(
`sse_read_timeout` determines how long (in seconds) the client will wait for a new
event before disconnecting. All other HTTP operations are controlled by `timeout`.
"""
read_stream: MemoryObjectReceiveStream[types.JSONRPCMessage | Exception]
read_stream_writer: MemoryObjectSendStream[types.JSONRPCMessage | Exception]
read_stream: MemoryObjectReceiveStream[SessionMessage | Exception]
read_stream_writer: MemoryObjectSendStream[SessionMessage | Exception]
write_stream: MemoryObjectSendStream[types.JSONRPCMessage]
write_stream_reader: MemoryObjectReceiveStream[types.JSONRPCMessage]
write_stream: MemoryObjectSendStream[SessionMessage]
write_stream_reader: MemoryObjectReceiveStream[SessionMessage]
read_stream_writer, read_stream = anyio.create_memory_object_stream(0)
write_stream, write_stream_reader = anyio.create_memory_object_stream(0)
@@ -97,7 +98,8 @@ async def sse_client(
await read_stream_writer.send(exc)
continue
await read_stream_writer.send(message)
session_message = SessionMessage(message)
await read_stream_writer.send(session_message)
case _:
logger.warning(
f"Unknown SSE event: {sse.event}"
@@ -111,11 +113,13 @@ async def sse_client(
async def post_writer(endpoint_url: str):
try:
async with write_stream_reader:
async for message in write_stream_reader:
logger.debug(f"Sending client message: {message}")
async for session_message in write_stream_reader:
logger.debug(
f"Sending client message: {session_message}"
)
response = await client.post(
endpoint_url,
json=message.model_dump(
json=session_message.message.model_dump(
by_alias=True,
mode="json",
exclude_none=True,