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fix: StreamableHTTPTransport got invalid json exception when receive a ping event from mcp server #28111 (#28116)

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hoffer
2025-11-13 20:19:48 +08:00
committed by GitHub
parent d1580791e4
commit ffc04f2a9b
1 changed files with 4 additions and 0 deletions
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4
api/core/mcp/client/streamable_client.py
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@@ -138,6 +138,10 @@ class StreamableHTTPTransport:
) -> bool: ) -> bool:
"""Handle an SSE event, returning True if the response is complete.""" """Handle an SSE event, returning True if the response is complete."""
if sse.event == "message": if sse.event == "message":
# ping event send by server will be recognized as a message event with empty data by httpx-sse's SSEDecoder
if not sse.data.strip():
return False
try: try:
message = JSONRPCMessage.model_validate_json(sse.data) message = JSONRPCMessage.model_validate_json(sse.data)
logger.debug("SSE message: %s", message) logger.debug("SSE message: %s", message)