Case sensitivity for xDS virtual host maching?
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Zhefu Jiang
Jan 9, 2026, 10:48:49 AM (2 days ago) Jan 9
to grpc.io
Hi,
In Envoy VHDS implementation, :authority pseudo header is first converted to lower-case before Virtual Host name matching: https://github.com/envoyproxy/envoy/blob/v1.36.4/source/common/http/route_config_update_requster.cc#L13
Is there / will there be similar enforcements in gRPC xDS implementation as well? For the context, currently we do not enforce xDS resource name to be case-insensitive on our management server, and therefore, in our environment xds://FooService is different from xds://fooservice. If gRPC will standardize the behavior in the future, we will prepare for it accordingly.
Thanks,
In Envoy VHDS implementation, :authority pseudo header is first converted to lower-case before Virtual Host name matching: https://github.com/envoyproxy/envoy/blob/v1.36.4/source/common/http/route_config_update_requster.cc#L13
Is there / will there be similar enforcements in gRPC xDS implementation as well? For the context, currently we do not enforce xDS resource name to be case-insensitive on our management server, and therefore, in our environment xds://FooService is different from xds://fooservice. If gRPC will standardize the behavior in the future, we will prepare for it accordingly.
Thanks,
Jeff
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