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gRPC client streaming typescript not created.

See original GitHub issue

Minimal protobuf example:

syntax = "proto3";

package filestream;

service FileService {
  rpc FileUploadCommand(stream FileUploadCommandRequest)
      returns (FileUploadCommandResponse) {}
  rpc FileDownloadCommand(FileDownloadCommandRequest)
      returns (stream FileDownloadCommandResponse) {}
}

enum FileCommand {
  FILE_UPLOAD = 0;
  FILE_DOWNLOAD = 1;
}

message FileContent {
  string filename = 1;
  bytes filecontent = 2;
}

message FileUploadCommandRequest { FileContent filecontent = 1; }

message FileUploadCommandResponse {
  string filename = 1;
  int64 filesize = 2;
}

message FileDownloadCommandRequest { string filename = 1; }

message FileDownloadCommandResponse { FileContent filecontent = 1; }

gRPC version: 1.48.1

protoc --version
libprotoc 3.19.4

protoc-gen-grpc-web version: 1.3.1-linux-x86_64

Command:

protoc -I=$DIR file.proto \
    --js_out=import_style=commonjs:$OUT_DIR \
    --grpc-web_out=import_style=typescript,mode=grpcwebtext:$OUT_DIR

Output:

/**
 * @fileoverview gRPC-Web generated client stub for filestream
 * @enhanceable
 * @public
 */

// GENERATED CODE -- DO NOT EDIT!


/* eslint-disable */
// @ts-nocheck


import * as grpcWeb from 'grpc-web';

import * as file_pb from './file_pb';


export class FileServiceClient {
  client_: grpcWeb.AbstractClientBase;
  hostname_: string;
  credentials_: null | { [index: string]: string; };
  options_: null | { [index: string]: any; };

  constructor (hostname: string,
               credentials?: null | { [index: string]: string; },
               options?: null | { [index: string]: any; }) {
    if (!options) options = {};
    if (!credentials) credentials = {};
    options['format'] = 'text';

    this.client_ = new grpcWeb.GrpcWebClientBase(options);
    this.hostname_ = hostname;
    this.credentials_ = credentials;
    this.options_ = options;
  }

  methodDescriptorFileDownloadCommand = new grpcWeb.MethodDescriptor(
    '/filestream.FileService/FileDownloadCommand',
    grpcWeb.MethodType.SERVER_STREAMING,
    file_pb.FileDownloadCommandRequest,
    file_pb.FileDownloadCommandResponse,
    (request: file_pb.FileDownloadCommandRequest) => {
      return request.serializeBinary();
    },
    file_pb.FileDownloadCommandResponse.deserializeBinary
  );

  fileDownloadCommand(
    request: file_pb.FileDownloadCommandRequest,
    metadata?: grpcWeb.Metadata): grpcWeb.ClientReadableStream<file_pb.FileDownloadCommandResponse> {
    return this.client_.serverStreaming(
      this.hostname_ +
        '/filestream.FileService/FileDownloadCommand',
      request,
      metadata || {},
      this.methodDescriptorFileDownloadCommand);
  }

}

Expectations: expected fileUploadCommand to be generated.