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refactor: reorganize message handling for better type safety and clarity (#239)
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* refactor: improve typing with memory stream type aliases

Move memory stream type definitions to models.py and use them throughout
the codebase for better type safety and maintainability.

GitHub-Issue:#201

* refactor: move streams to ParsedMessage

* refactor: update test files to use ParsedMessage

Updates test files to work with the ParsedMessage stream type aliases
and fixes a line length issue in test_201_client_hangs_on_logging.py.

Github-Issue:#201

* refactor: rename ParsedMessage to MessageFrame for clarity

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

* refactor: move MessageFrame class to types.py for better code organization

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

* fix pyright

* refactor: update websocket client to use MessageFrame

Modified the websocket client to work with the new MessageFrame type,
preserving raw message text and properly extracting the root JSON-RPC
message when sending.

Github-Issue:#204

* fix: use NoneType instead of None for type parameters in MessageFrame

🤖 Generated with [Claude Code](https://claude.ai/code)

* refactor: rename root to message
This commit is contained in:
David Soria Parra 2025-03-13 13:44:55 +00:00 • committed by GitHub
commit 9d0f2daddb
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1 changed files with 283 additions and 151 deletions
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7
src/mcp/server/lowlevel/server.py
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@ -74,7 +74,6 @@ from contextlib import AbstractAsyncContextManager, AsyncExitStack, asynccontext
from typing import Any, AsyncIterator, Generic, TypeVar
import anyio
from anyio.streams.memory import MemoryObjectReceiveStream, MemoryObjectSendStream
from pydantic import AnyUrl
import mcp.types as types
@ -84,7 +83,7 @@ from mcp.server.session import ServerSession
from mcp.server.stdio import stdio_server as stdio_server
from mcp.shared.context import RequestContext
from mcp.shared.exceptions import McpError
from mcp.shared.session import RequestResponder
from mcp.shared.session import ReadStream, RequestResponder, WriteStream
logger = logging.getLogger(__name__)
@ -474,8 +473,8 @@ class Server(Generic[LifespanResultT]):
async def run(
self,
read_stream: MemoryObjectReceiveStream[types.JSONRPCMessage | Exception],
write_stream: MemoryObjectSendStream[types.JSONRPCMessage],
read_stream: ReadStream,
write_stream: WriteStream,
initialization_options: InitializationOptions,
# When False, exceptions are returned as messages to the client.
# When True, exceptions are raised, which will cause the server to shut down