mirror of
https://github.com/nuxt/nuxt.git
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16c12d1e85
* refactor: remove unnecessary return await * refactor: remove unnecessary async
220 lines
7.3 KiB
JavaScript
220 lines
7.3 KiB
JavaScript
import Vue from 'vue'
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import clone from 'clone'
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import { stringify } from 'querystring'
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import { omit } from 'lodash'
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import middleware from './middleware'
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import { createApp, NuxtError } from './index'
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import { applyAsyncData, sanitizeComponent, getMatchedComponents, getContext, middlewareSeries, promisify, urlJoin } from './utils'
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const debug = require('debug')('nuxt:render')
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debug.color = 4 // force blue color
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const isDev = <%= isDev %>
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const noopApp = () => new Vue({ render: (h) => h('div') })
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const createNext = ssrContext => opts => {
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ssrContext.redirected = opts
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// If nuxt generate
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if (!ssrContext.res) {
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ssrContext.nuxt.serverRendered = false
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return
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}
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opts.query = stringify(opts.query)
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opts.path = opts.path + (opts.query ? '?' + opts.query : '')
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if (opts.path.indexOf('http') !== 0 && ('<%= router.base %>' !== '/' && opts.path.indexOf('<%= router.base %>') !== 0)) {
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opts.path = urlJoin('<%= router.base %>', opts.path)
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}
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// Avoid loop redirect
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if (opts.path === ssrContext.url) {
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ssrContext.redirected = false
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return
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}
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ssrContext.res.writeHead(opts.status, {
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'Location': opts.path
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})
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ssrContext.res.end()
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}
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// This exported function will be called by `bundleRenderer`.
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// This is where we perform data-prefetching to determine the
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// state of our application before actually rendering it.
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// Since data fetching is async, this function is expected to
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// return a Promise that resolves to the app instance.
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export default async ssrContext => {
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// Create ssrContext.next for simulate next() of beforeEach() when wanted to redirect
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ssrContext.redirected = false
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ssrContext.next = createNext(ssrContext)
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// Used for beforeNuxtRender({ Components, nuxtState })
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ssrContext.beforeRenderFns = []
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// Create the app definition and the instance (created for each request)
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const { app, router<%= (store ? ', store' : '') %> } = await createApp(ssrContext)
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const _app = new Vue(app)
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// Nuxt object (window.__NUXT__)
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ssrContext.nuxt = { layout: 'default', data: [], error: null<%= (store ? ', state: null' : '') %>, serverRendered: true }
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// Add meta infos (used in renderer.js)
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ssrContext.meta = _app.$meta()
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// Keep asyncData for each matched component in ssrContext (used in app/utils.js via this.$ssrContext)
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ssrContext.asyncData = {}
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const beforeRender = async () => {
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// Call beforeNuxtRender() methods
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await Promise.all(ssrContext.beforeRenderFns.map((fn) => promisify(fn, { Components, nuxtState: ssrContext.nuxt })))
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<% if (store) { %>
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// Add the state from the vuex store
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ssrContext.nuxt.state = store.state
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<% } %>
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}
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const renderErrorPage = async () => {
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// Load layout for error page
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let errLayout = (typeof NuxtError.layout === 'function' ? NuxtError.layout(app.context) : NuxtError.layout)
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ssrContext.nuxt.layout = errLayout || 'default'
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await _app.loadLayout(errLayout)
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_app.setLayout(errLayout)
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await beforeRender()
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return _app
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}
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const render404Page = () => {
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app.context.error({ statusCode: 404, message: '<%= messages.error_404 %>' })
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return renderErrorPage()
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}
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<% if (isDev) { %>const s = isDev && Date.now()<% } %>
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// Components are already resolved by setContext -> getRouteData (app/utils.js)
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const Components = getMatchedComponents(router.match(ssrContext.url))
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<% if (store) { %>
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/*
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** Dispatch store nuxtServerInit
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*/
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if (store._actions && store._actions.nuxtServerInit) {
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try {
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await store.dispatch('nuxtServerInit', app.context)
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} catch (err) {
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debug('error occurred when calling nuxtServerInit: ', err.message)
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throw err
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}
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}
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// ...If there is a redirect or an error, stop the process
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if (ssrContext.redirected) return noopApp()
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if (ssrContext.nuxt.error) return renderErrorPage()
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<% } %>
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/*
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** Call global middleware (nuxt.config.js)
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*/
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let midd = <%= serialize(router.middleware).replace('middleware(', 'function(') %>
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midd = midd.map((name) => {
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if (typeof name === 'function') return name
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if (typeof middleware[name] !== 'function') {
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ssrContext.error({ statusCode: 500, message: 'Unknown middleware ' + name })
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}
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return middleware[name]
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})
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await middlewareSeries(midd, app.context)
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// ...If there is a redirect or an error, stop the process
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if (ssrContext.redirected) return noopApp()
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if (ssrContext.nuxt.error) return renderErrorPage()
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/*
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** Set layout
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*/
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let layout = Components.length ? Components[0].options.layout : NuxtError.layout
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if (typeof layout === 'function') layout = layout(app.context)
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await _app.loadLayout(layout)
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layout = _app.setLayout(layout)
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// ...Set layout to __NUXT__
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ssrContext.nuxt.layout = _app.layoutName
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/*
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** Call middleware (layout + pages)
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*/
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midd = []
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if (layout.middleware) midd = midd.concat(layout.middleware)
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Components.forEach((Component) => {
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if (Component.options.middleware) {
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midd = midd.concat(Component.options.middleware)
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}
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})
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midd = midd.map((name) => {
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if (typeof name === 'function') return name
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if (typeof middleware[name] !== 'function') {
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app.context.error({ statusCode: 500, message: 'Unknown middleware ' + name })
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}
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return middleware[name]
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})
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await middlewareSeries(midd, app.context)
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// ...If there is a redirect or an error, stop the process
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if (ssrContext.redirected) return noopApp()
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if (ssrContext.nuxt.error) return renderErrorPage()
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/*
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** Call .validate()
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*/
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let isValid = true
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Components.forEach((Component) => {
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if (!isValid) return
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if (typeof Component.options.validate !== 'function') return
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isValid = Component.options.validate({
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params: app.context.route.params || {},
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query: app.context.route.query || {},
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<%= (store ? 'store' : '') %>
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})
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})
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// ...If .validate() returned false
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if (!isValid) {
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// Don't server-render the page in generate mode
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if (ssrContext._generate) ssrContext.nuxt.serverRendered = false
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// Render a 404 error page
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return render404Page()
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}
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// If no Components found, returns 404
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if (!Components.length) return render404Page()
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// Call asyncData & fetch hooks on components matched by the route.
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let asyncDatas = await Promise.all(Components.map(Component => {
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let promises = []
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// Call asyncData(context)
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if (Component.options.asyncData && typeof Component.options.asyncData === 'function') {
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let promise = promisify(Component.options.asyncData, app.context)
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promise.then(asyncDataResult => {
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ssrContext.asyncData[Component.cid] = asyncDataResult
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applyAsyncData(Component)
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return asyncDataResult
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})
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promises.push(promise)
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} else {
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promises.push(null)
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}
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// Call fetch(context)
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if (Component.options.fetch) {
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promises.push(Component.options.fetch(app.context))
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}
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else {
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promises.push(null)
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}
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return Promise.all(promises)
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}))
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<% if (isDev) { %>if (asyncDatas.length) debug('Data fetching ' + ssrContext.url + ': ' + (Date.now() - s) + 'ms')<% } %>
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// datas are the first row of each
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ssrContext.nuxt.data = asyncDatas.map(r => r[0] || {})
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// ...If there is a redirect or an error, stop the process
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if (ssrContext.redirected) return noopApp()
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if (ssrContext.nuxt.error) return renderErrorPage()
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// Call beforeNuxtRender methods & add store state
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await beforeRender()
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return _app
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}
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