pbf

Example Protocol Buffers file

syntax = "proto3";

message Position {
    double lat = 1;
    double lon = 2;
    sint32 x = 3;
    sint32 y = 4;
}

With pre-compiled reader

1. generate protobuf reader with pbf CLI tool:

> npx pbf example.proto --browser --no-write

2. copy/paste generated code to handler

Example handler code

import Pbf from "https://cdn.skypack.dev/[email protected]";

/**
 * declare non-standard `self` variable, because it's used in generated code
 * @type {any} */
const self = {};

// #region code generated by pbf v3.2.1

// Position ========================================

var Position = self.Position = {};

Position.read = function (pbf, end) {
  return pbf.readFields(Position._readField, { lat: 0, lon: 0, x: 0, y: 0 }, end);
};
Position._readField = function (tag, obj, pbf) {
  if (tag === 1) obj.lat = pbf.readDouble();
  else if (tag === 2) obj.lon = pbf.readDouble();
  else if (tag === 3) obj.x = pbf.readSVarint();
  else if (tag === 4) obj.y = pbf.readSVarint();
};
// #endregion


/**
 * @param {string} payload base64 encoded protobuf
 */
export function process(payload) {
  const { buffer } = ric.base64.decode(payload);

  const { lat, lon, x, y } = Position.read(new Pbf(buffer));
  return { lat, lon, x, y };
}

/**
 * @test payload "CflJtU/H30tAEXrHKTqSz0JAGBQgKA=="
 */

Without pre-compiled reader

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