can GRPC be used to to accept only raw byte array?

[Elhanan Maayan]

let's say i have i have a service that will send a stream of protobuff messages 

i'd like to have a client that won't automatically marshal those messages, but will just give me that byte array (let's say i wanted to write them to a file along with some meta data) 

and then be able  to parse them with regular protobuff api 

[Jihun Cho]

assuming you are using java (according to past questions)

yes, at least java it is possible. good starting point is following the json blog post

https://grpc.io/blog/grpc-with-json/

it uses custom marshaller to handle json format. in your case, modify the marshaller to write to a file.

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