Support Any.proto for GRPC

[CandiedCode]

Brief summary

For a GRPC service whose message type uses Any.proto. K6 is unable to locate the protobuf to serialize to the given type.

Given a data object such as

{ context: 'test',
   payload: {
            "@type": "type.googleapis.com/test.Client",
            "client_id": 1234,
          },
}

k6 will throw an error:
unable to serialise request object to protocol buffer: proto: (line 1:157): unable to resolve "type.googleapis.com/test.Client": "not found"

k6 version

k6 v0.36.0 ((devel), go1.17.6, darwin/amd64)

OS

macOS Montery

Docker version and image (if applicable)

No response

Steps to reproduce the problem

For a given grpc service such as

syntax = "proto3";

package test;

import "google/protobuf/any.proto";

service Publisher {
    rpc Publish (PublishRequest) returns (PublishResponse);
}

message PublishRequest {
    string context = 1;
    google.protobuf.Any payload = 3;
}
...

That references Any.proto, k6 is not able to serialize to the expected protobuf type, even if it's part of the client.load protobuf definitions.

client.load(['event-schemas/protobufs', '../../protos'],
    'context.proto',
    'action.proto',
    'client.proto',  # example protobuf definitions from event-schema that we want to pack as Any.proto
    'relay.proto',  # part of the grpc service
    );

The protobuf descriptors seem to load correctly, but since they aren't directly related to a service descriptor I think they are filtered out here possibly and fails here.

Expected behaviour

Any.proto is able to seralize to any proto passed into client.load.serialize

Actual behaviour

Exception thrown

unable to serialise request object to protocol buffer: proto: (line 1:157): unable to resolve "type.googleapis.com/test.Client": "not found"

[jamie-macdonald]

has this been released? and what version is it in?

[na--]

Yes, this has been released in k6 v0.39.0, as the issue milestone suggests: https://github.com/grafana/k6/blob/master/release%20notes/v0.39.0.md#bug-fixes

If you think there is another bug, please open a new issue about it. And if you are having problems with using it, feel free to ask for advice in the community forum at https://community.k6.io/

[jamie-macdonald]

Thanks its working, after the usual amount of playing. yeah!

[amnbcw]

I am using k6 v0.54.0 (commit/baba871c8a, go1.23.1, linux/amd64), and still running into this issue. :/

[inancgumus]

Hi @amnbcw, can you give us the steps to reproduce the issue?