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fix: Catch http errors #1308

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fix: Catch http errors #1308

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66c844a
http error gets pushed through
lorenss-m Aug 13, 2025
3142084
Merge branch 'main' into cherry-pick-9352949
lorenss-m Dec 11, 2025
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19 changes: 12 additions & 7 deletions 19 src/mcp/client/streamable_http.py
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Original file line number Diff line number Diff line change
Expand Up @@ -558,17 +558,22 @@ async def post_writer(
read_stream_writer=read_stream_writer,
)

async def handle_request_async():
if is_resumption:
await self._handle_resumption_request(ctx)
else:
await self._handle_post_request(ctx)
async def handle_request_async(ctx: RequestContext, is_resumption: bool) -> None:
try:
if is_resumption:
await self._handle_resumption_request(ctx)
else:
await self._handle_post_request(ctx)
except Exception as e:
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@felixweinberger felixweinberger Sep 23, 2025

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This is too broad of an error, we should be more specific about the type of Exception we handle here.

We should at least limit to HTTPStatusError if your problem is with HTTP errors specifically.

# Send error to read stream so client knows request failed
logger.error("Request handler error: %s", e)
await ctx.read_stream_writer.send(e)

# If this is a request, start a new task to handle it
if isinstance(message.root, JSONRPCRequest):
tg.start_soon(handle_request_async)
tg.start_soon(handle_request_async, ctx, is_resumption)
else:
await handle_request_async()
await handle_request_async(ctx, is_resumption)

except Exception:
logger.exception("Error in post_writer") # pragma: no cover
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