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gRPC Protobuf Loader

A utility package for loading .proto files for use with gRPC, using the latest Protobuf.js package. Please refer to protobuf.js' documentation to understands its features and limitations.

Installation

npm install @grpc/proto-loader

Usage

const protoLoader = require('@grpc/proto-loader');
const grpcLibrary = require('grpc');
// OR
const grpcLibrary = require('@grpc/grpc-js');

protoLoader.load(protoFileName, options).then(packageDefinition => {
  const packageObject = grpcLibrary.loadPackageDefinition(packageDefinition);
});
// OR
const packageDefinition = protoLoader.loadSync(protoFileName, options);
const packageObject = grpcLibrary.loadPackageDefinition(packageDefinition);

The options parameter is an object that can have the following optional properties:

Field name	Valid values	Description
`keepCase`	`true` or `false`	Preserve field names. The default is to change them to camel case.
`longs`	`String` or `Number`	The type to use to represent `long` values. Defaults to a `Long` object type.
`enums`	`String`	The type to use to represent `enum` values. Defaults to the numeric value.
`bytes`	`Array` or `String`	The type to use to represent `bytes` values. Defaults to `Buffer`.
`defaults`	`true` or `false`	Set default values on output objects. Defaults to `false`.
`arrays`	`true` or `false`	Set empty arrays for missing array values even if `defaults` is `false` Defaults to `false`.
`objects`	`true` or `false`	Set empty objects for missing object values even if `defaults` is `false` Defaults to `false`.
`oneofs`	`true` or `false`	Set virtual oneof properties to the present field's name. Defaults to `false`.
`includeDirs`	An array of strings	A list of search paths for imported `.proto` files.

The following options object closely approximates the existing behavior of grpc.load:

const options = {
  keepCase: true,
  longs: String,
  enums: String,
  defaults: true,
  oneofs: true
}

freshup / vending-agent-dep deb

gRPC Protobuf Loader

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