Pass InputStream to Protobuf.load

[fsantanna]

What is your use-case and why do you need this feature?

AFAIU, currently I can only to pass a ByteArray when deserializing data.
I wonder if it would be possible to pass an InputStream instead.

I want to deserialize a variable-size data structure coming from the network, so I don't know the exact size beforehand to create a ByteArray.

(I'm sorry if I missed some important information about the design that invalidates this question.)

Describe the solution you'd like

[fsantanna]

Forgot to mention that my current solution is to serialize the data structure to a ByteArray, get its resulting size, transmit the size in separate and than transmit the buffer.

[Dominaezzz]

Not a direct answer but is relevant. #204 and #253

[sandwwraith]

It all will be resolved after #253 – formats would operate kotlinx.io.Input and kotlinx.io.Output. Unfortunately, kotlinx.io is not mature enough (yet).

[AlexanderBykin]

@fsantanna
hi, can you please share example of how do you use protobuf with serialization/deserialization?
don't understand why it is missed at sample sources

[fsantanna]

@AlexanderShniperson ,

This is how I'm doing:

import kotlinx.serialization.protobuf.ProtoBuf

@Serializable
data class MyData (...)

val myData = MyData(...)

// from data to bytearray
val bytes: ByteArray = ProtoBuf.dump(MyData.serializer(), myData)

// from bytearray back to data
val myData2 = ProtoBuf.load(MyData.serializer(), bytes)

It's actually very straightforward.

[qwwdfsad]

Closing as duplicate