Hi amits, Sorry for the late replay. I have write a minimal example to express my question. https://gist.github.com/codingbaobao/f89291866024a97c1b476a682f82c029
The main purpose is trying to manage request&response header in interceptor, in order to share come context or status. I have try metadata.FromIncomingContext() and seems empty. Is there have any method to send request header first without sending payload? Since this concept is documented in here: https://grpc.io/docs/what-is-grpc/core-concepts/#unary-rpc Or, any method that can let me access response header without wrapping a ClientStream? thanks! [email protected] 在 2022年4月1日 星期五上午5:49:54 [UTC+8] 的信中寫道： > Have you tried the metadata.FromIncomingContext() function? > > You haven't shared your example code - i think that will be useful for > others to help you. > > > > > > On Thursday, March 31, 2022 at 3:44:02 PM UTC+11 [email protected] wrote: > >> Hi all, >> >> Currently I have a rpc like this: >> *rpc SayHello (HelloRequest) returns (stream HelloReply) {}* >> >> Now I add a StreamClientInterceptor to catch response initial metadata, >> but it block forever, and server shows that no request get, at least not >> into the rpc function. >> >> The interceptor is similar to this example: >> >> https://github.com/grpc/grpc-go/blob/master/examples/features/interceptor/client/main.go#L90 >> and I just add a line under L107 : >> *responseMeta, err := s.Header() //<-- block here* >> >> Im sure that I can done in Python code, which is implement similar to: >> >> https://github.com/grpc/grpc/blob/master/examples/python/interceptors/headers/generic_client_interceptor.py#L33 >> and adds code under L37: >> *print(response_it.initial_metadata())* >> >> Can anyone tell me what is wrong of my Golang code? >> Actually I can get header by wrapping grpc.ClientStream and received in >> RecvMsg() >> and I observed that I can only get header after SendMsg, but it doesn't >> make sense :( >> > -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/994136f1-ed91-4c01-8a62-7ecb27bb02e6n%40googlegroups.com.
