getAttachment(key) will retutn null cause key will change to lowcase in grpc

[vio-lin]

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has any one find this case？
when i use attachment to transport attachemt from client to service such as Key1:Value1
and in service i should use key1 to get real value.

[AlbumenJ]

Triple protocol or grpc protocol?

[kimmking]

and which version of dubbo?

[EarthChen]

This is caused by the http2 protocol, which only supports lowercase headers, and the current triple protocol already supports this feature

[vio-lin]

grpc protocol and in dubbo 2.7.10.