msgpack_sample_request

README.md

msgpack sample

A brief demonstration of sending a messagepack encoded trace

requirements and testing notes

tested with Node v10.15.1 and NPM 6.4.1

setup

• download repository
• cd into the root of this directory
• npm install
• ensure datadog agent is installed, running locally, and listening for traces at port 8126, instructions here
• node index.js

sample output

msgpack_sample_request$ node index.js
200 { rate_by_service: { 'service:,env:': 1 } }
919188a874726163655f6964cf1122110bbf049c00a77370616e5f6964cf112211096af8b800a46e616d65a772657175657374a87265736f75726365b46765746163636f756e7464657461696c5f74776fa57374617274cf1601d2b062e98f00a86475726174696f6ecf000000005fe7dd58a474797065a3776562a773657276696365b1636f6d6d657263652d64622d70726f7879

index.js

const axios = require('axios')
const msgpack = require('msgpack-lite')
const { Int64BE, Uint64BE } = require('int64-buffer')

const message = {
"trace_id": new Uint64BE(1234567990000000001),
"span_id": new Uint64BE(1234567980000000001),
"name": "request",
"resource": "getaccountdetail_two",
"start": new Uint64BE(1585780198826676000),
"duration": new Uint64BE(1609031000),
"type": "web",
"service": "commerce-db-proxy"}

const sendTrace = span => {
  codec = msgpack.createCodec({ int64: true })

  const output = msgpack.encode([[span]], { codec } )

  axios.request({
  	method: 'PUT',
  	url: 'http://localhost:8126/v0.4/traces',
  	data: output,
  	headers: {
  	  'Content-Type': 'application/msgpack',
  	  "X-Datadog-Trace-Count": 1
  	}
  }).then(function(x,y) {
  	console.log(x.status, x.data)
  	console.log(output.toString('hex'))
  }).catch(function(x) {
  	console.warn('error', x.response.data)
  })
}

sendTrace(message)

package.json

{
  "name": "msgpack_test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "starrt": "node index.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "axios": "^0.19.2",
    "int64-buffer": "^0.99.1007",
    "msgpack-lite": "^0.1.26"
  }
}