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server.js
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server.js
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'use strict'
const fs = require('fs')
const path = require('path')
const express = require('express')
const favicon = require('serve-favicon')
const serialize = require('serialize-javascript')
const helmet = require('helmet')
const resolve = file => path.resolve(__dirname, file)
const isProd = process.env.NODE_ENV === 'production'
const serverInfo =
`express/${require('express/package.json').version} ` +
`vue-server-renderer/${require('vue-server-renderer/package.json').version}`
const app = express()
let indexHTML // generated by html-webpack-plugin
let renderer // created from the webpack-generated server bundle
if (isProd) {
// in production: create server renderer and index HTML from real fs
renderer = createRenderer(fs.readFileSync(resolve('./dist/server-bundle.js')))
indexHTML = parseIndex(fs.readFileSync(resolve('./dist/index.html'), 'utf-8'))
} else {
// in development: setup the dev server with watch and hot-reload,
// and update renderer / index HTML on file change.
require('./build/setup-dev-server')(app, {
bundleUpdated: bundle => {
renderer = createRenderer(bundle)
},
indexUpdated: index => {
indexHTML = parseIndex(index)
}
})
}
function createRenderer (bundle) {
// https://github.com/vuejs/vue/blob/dev/packages/vue-server-renderer/README.md#why-use-bundlerenderer
return require('vue-server-renderer').createBundleRenderer(bundle, {
cache: require('lru-cache')({
max: 1000,
maxAge: 1000 * 60 * 15
})
})
}
function parseIndex (template) {
const contentMarker = '<!-- APP -->'
const i = template.indexOf(contentMarker)
return {
head: template.slice(0, i),
tail: template.slice(i + contentMarker.length)
}
}
const serve = (path, cache) => express.static(resolve(path), {
maxAge: cache && isProd ? 60 * 60 * 24 * 30 : 0
})
app.use(helmet())
app.use(favicon('./public/logo-48.png'))
app.use('/service-worker.js', serve('./dist/service-worker.js'))
app.use('/dist', serve('./dist'))
app.use(express.static('public'))
app.get('*', (req, res) => {
if (!renderer) {
return res.end('waiting for compilation... refresh in a moment.')
}
res.setHeader('Content-Type', 'text/html')
res.setHeader('Server', serverInfo)
let s = Date.now()
const context = { url: req.url}
const renderStream = renderer.renderToStream(context)
renderStream.once('data', () => {
const replace = '<!-- HEAD -->'
let replaceWith = `<title>${context.initialState.head.title}</title>
<meta name="mobile-web-app-capable" content="yes">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="shortcut icon" sizes="48x48" href="/public/logo-48.png">
<meta name="theme-color" content="#f60">
<link rel="manifest" href="/manifest.json">
<meta name="description" content="${context.initialState.head.description}" />
<meta property="og:title" content="${context.initialState.head.title}">
<meta property="og:description" content="${context.initialState.head.description}">
<meta property="og:image" content="https://${req.get('host')}/public/${context.initialState.head.image}">
<meta property="og:url" content="https://${req.get('host') + req.originalUrl}">
<meta name="twitter:card" content="summary_large_image">
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-########-#', 'auto');
ga('set', 'page', '${req.originalUrl}');
ga('send', 'pageview');
</script>`
res.write(indexHTML.head.replace(replace, replaceWith))
})
renderStream.on('data', chunk => {
res.write(chunk)
})
renderStream.on('end', () => {
// embed initial store state
if (context.initialState) {
res.write(
`<script>window.__INITIAL_STATE__=${
serialize(context.initialState, { isJSON: true })
}</script>`
)
}
res.end(indexHTML.tail)
console.log(`whole request: ${Date.now() - s}ms`)
})
renderStream.on('error', err => {
if (err && err.code === '404') {
res.status(404).end('404 | Page Not Found')
return
}
// Render Error Page or Redirect
res.status(500).end('Internal Error 500')
console.error(`error during render : ${req.url}`)
console.error(err)
})
})
const port = process.env.PORT || 8080
app.listen(port, () => {
console.log(`server started at localhost:${port}`)
})