Call nodejs frameworks routes programmatically

All those examples will call GET /some/other/path when GET / is called with different frameworks.

# Expressjs 4.x

For example, the endpoint / transfers the request to another route:

var app = express()

function myRoute(req, res, next) {
  return res.send('ok')
}

function home(req, res, next) {
   req.url = '/some/other/path'
   //if we want to change the method: req.method = 'POST'
   return app._router.handle(req, res, next)
}

app.get('/some/other/path', myRoute)
app.get('/', home)

This is not api-documented as it’s a private method, code. It dispatches the req and res into the router.

# Hapi.js 11.2

Here it’s almost the same, except that this method is api-documented and can be used for a lot more!

var Hapi = require('hapi')
var server = new Hapi.Server()
server.connection({ port: 3000 })

function myRoute(request, reply) {
  return reply('ok')
}

function home(request, reply) {
  server.inject({
    url: '/some/other/path',
    //method: 'POST'
  }, function (res) {
    return reply(res.result)
  })
}

server.route({ method: 'GET', path: '/some/other/path', handler: myRoute })
server.route({ method: 'GET', path: '/', handler: home })

server.start(function() {})

Api is server.inject(options, callback) and looks really powerful!

# Koa.js 1.1.1 + koa-route 2.4.2 

var koa = require('koa')
var route = require('koa-route')
var app = koa()

app.use(route.get('/', home))
app.use(route.get('/some/other/path', myRoute))

function *home(next) {
  this.request.url = '/some/other/path'
  //this.request.method = 'POST'
  yield next
}

function *myRoute() {
  this.body = 'ok'
}

app.listen(3000)

Or with 2.0.0-alpaha.2:

var Koa = require('koa')
var route = require('koa-route')
var app = new Koa()

app.use((ctx, next) => {
  if(ctx.url == '/') {
    ctx.url = '/some/other/path'
  }

  return next()
})

app.use((ctx, next) => {
  ctx.body = 'ok'
})

app.listen(3000)