superstatic, etag

SPA-no-cache-server.js

const superstatic = require('superstatic').server
const path = require('path')
const fsProvider = require('superstatic/lib/providers/fs')

// Remove etag, cancel the browser's cache, avoid update issues
function noCacheProvider (options) {
  const handler = fsProvider(options)
  return (req, pathname) => handler(req, pathname).then(res => {
    if (res) { // res can be null
      res.modified = false
      res.etag = false
    }
    return res
  })
}

const config = {
  'rewrites': [
    {'source': '/*', 'destination': 'index.html'}
  ]
}

const port = Number(process.env.PORT) || 8080
const distPath = path.join(__dirname, './dist')

const app = superstatic({
  provider: noCacheProvider({cwd: distPath, ...config}),
  port,
  cwd: distPath,
  config,
  compression: true
})

app.listen(() => {
  console.log(`Serving on port ${port}...`)
})