grpc-metadata

https://github.com/grpc/grpc-go/blob/master/Documentation/grpc-metadata.md

https://github.com/grpc/grpc-go/blob/master/examples/features/metadata/client/main.go

https://pkg.go.dev/google.golang.org/grpc/metadata

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原文地址：https://www.cnblogs.com/rsapaper/p/14119039.html