an storage on async_hooks, hack callstack.
Mandatory use through the variable process.storage
npm install stack-storageconst koa = require('koa')
const _ = require('lodash')
const uuid = require('uuid')
const { promisify } = require('util')
const Storage = require('stack-storage')
const sleep = promisify(setTimeout)
const app = new koa()
function log(...args) {
const xRequestId = process.storage.get('x-request-id')
console.log(xRequestId, ...args)
}
app.use((ctx, next) => {
process.storage = new Storage([
['x-request-id', _.get(ctx.req.headers, 'x-request-id', `api:${uuid.v4()}`)],
])
return next()
})
app.use(async (ctx, next) => {
const { method, url } = ctx.request
log('Incoming message', { method, url })
await next()
const { status, body } = ctx
log('Server response', { status, body })
})
app.use(async (ctx) => {
// Example async
await sleep(500)
ctx.body = 'Hello World'
})
app.listen(3000)