Hi All,

Given a stream of raw HTTP2 traffic between a gRPC server and client, how 
to extract the protobufs?

We were following gRPC over HTTP2 
<https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md>. We are 
stuck in how to extract the encoded protobuf binary string from the HTTP2 
DATA frame. And the spec does not go into more details about the format of 
how protobuf binary strings are encoded in DATA frames.

We were trying to read the gRPC source code <https://github.com/grpc/grpc> 
to figure out the protocol, but could not identify the right APIs.

Why? We are sort of reverse-engineering the gRPC protocol. And try to 
extract the traffic outside of the gRPC server and client, and convert them 
back into protobufs.

Any pointers on docs that explain the format, or to the APIs inside gRPC 
source code would be highly appreciated.

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