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fix: use Mount instead of Route for SSE message handling #77

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fix: use Mount instead of Route for SSE message handling #77

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9 changes: 3 additions & 6 deletions src/fastmcp/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -428,9 +428,9 @@ async def run_stdio_async(self) -> None:
async def run_sse_async(self) -> None:
"""Run the server using SSE transport."""
from starlette.applications import Starlette
from starlette.routing import Route
from starlette.routing import Route, Mount

sse = SseServerTransport("/messages")
sse = SseServerTransport("/messages/")

async def handle_sse(request):
async with sse.connect_sse(
Expand All @@ -442,14 +442,11 @@ async def handle_sse(request):
self._mcp_server.create_initialization_options(),
)

async def handle_messages(request):
await sse.handle_post_message(request.scope, request.receive, request._send)

starlette_app = Starlette(
debug=self.settings.debug,
routes=[
Route("/sse", endpoint=handle_sse),
Route("/messages", endpoint=handle_messages, methods=["POST"]),
Mount("/messages/", app=sse.handle_post_message),
],
)

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