express-response-formatter

express-response-formatter

Better way to format Express response

Installation

npm install express-response-formatter --save

Quick Start

Example usage

const app = require('express')()
const responseEnhancer = require('express-response-formatter')

// Add formatter functions to "res" object via "responseEnhancer()"
app.use(responseEnhancer())

app.get('/success', (req, res) => {
  const users = [{ name: 'Dana Kennedy' }, { name: 'Warren Young' }]

  // It's enhance "res" with "formatter" which contain formatter functions
  res.formatter.ok(users)
})

app.listen(3000, () => console.log('Start at http://localhost:3000'))

Result

HTTP/1.1 200 Ok
{
  "data": [
    {
      "name": "Dana Kennedy"
    },
    {
      "name": "Warren Young"
    }
  ]
}

More usages

200 OK with "meta field"

app.get('/success-with-meta', (req, res) => {
  const users = [{ name: 'Dana Kennedy' }, { name: 'Warren Young' }]

  const meta = {
    total: 2,
    limit: 10,
    offset: 0,
  }

  res.formatter.ok(users, meta)
})

HTTP/1.1 200 Ok
{
  "meta": {
    "total": 2,
    "limit": 10,
    "offset": 0,
  },
  "data": [
    {
      "name": "Dana Kennedy"
    },
    {
      "name": "Warren Young"
    }
  ]
}

400 Bad Request with "multiple errors"

app.get('/bad-request', (req, res) => {
  const errors = [
    { detail: 'Field id is required.' },
    { detail: 'Field foo is required.' },
  ]

  res.formatter.badRequest(errors)
})

HTTP/1.1 400 Bad Request
{
  "errors": [
    {
      "detail": "Field id is required."
    },
    {
      "detail": "Field foo is required."
    }
  ]
}

APIs

METHOD	STATUS CODE
res.formatter.ok(data, meta?)	200
res.formatter.created(data, meta?)	201
res.formatter.accepted(data, meta?)	202
res.formatter.noContent(data, meta?)	204
res.formatter.badRequest(errors)	400
res.formatter.unauthorized(errors)	401
res.formatter.forbidden(errors)	403
res.formatter.notFound(errors)	404
res.formatter.methodNotAllowed(errors)	405
res.formatter.timeout(errors)	408
res.formatter.conflict(errors)	409
res.formatter.unprocess(errors)	422
res.formatter.tooManyRequests(errors)	429
res.formatter.serverError(errors)	500
res.formatter.badGateway(errors)	502
res.formatter.serviceUnavailable(errors)	503
res.formatter.gatewayTimeout(errors)	504