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fix: fix StructuredLoggingMiddleware payload serialization

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Vincent Liu 2025-08-26 13:30:21 +08:00 • committed by GitHub
commit 41d6b6fc15
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1 changed files with 3 additions and 3 deletions
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6
src/fastmcp/server/middleware/logging.py
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@ -152,7 +152,7 @@ class StructuredLoggingMiddleware(Middleware):
if self.methods and context.method not in self.methods:
return await call_next(context)
self.logger.log(self.log_level, json.dumps(start_entry))
self.logger.log(self.log_level, json.dumps(start_entry, default=str))
try:
result = await call_next(context)
@ -162,7 +162,7 @@ class StructuredLoggingMiddleware(Middleware):
"request_success",
result_type=type(result).__name__ if result else None,
)
self.logger.log(self.log_level, json.dumps(success_entry))
self.logger.log(self.log_level, json.dumps(success_entry, default=str))
return result
except Exception as e:
@ -172,5 +172,5 @@ class StructuredLoggingMiddleware(Middleware):
error_type=type(e).__name__,
error_message=str(e),
)
self.logger.log(logging.ERROR, json.dumps(error_entry))
self.logger.log(logging.ERROR, json.dumps(error_entry, default=str))
raise