uws-connect/src/utils/log.js

Use connect like middlewares with uWebSockets.js

const { DEBUG_LEVEL = '' } = process.env

const LEVELS = ['error', 'warn', 'info', 'debug', 'trace']

let isMaxLevel = false
const noop = () => undefined

/**
 * a very simple console logger. Far from being performant
 * consider alternative options like:
 * - [pino](https://npmjs.com/package/pino)
 * - [debug-level](https://npmjs.com/package/debug-level)
 */
export const log = LEVELS
  .reduce((o, level) => {
    const oo = {
      ...o,
      [level]: isMaxLevel
        ? noop
        : (...args) => {
            const str = level.toUpperCase()
            if (typeof args[0] === 'string') { // may contain formatting
              args[0] = `${str}: ${args[0]}`
            } else {
              args.unshift(str)
            }
            console[level](...args)
          }
    }
    if (DEBUG_LEVEL.toLowerCase() === level) {
      isMaxLevel = true
    }
    return oo
  }, {})