mirror of
https://github.com/nuxt/nuxt.git
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233 lines
8.8 KiB
JavaScript
233 lines
8.8 KiB
JavaScript
'use strict'
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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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// 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 (context) => {
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// create context.next for simulate next() of beforeEach() when wanted to redirect
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context.redirected = false
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context.next = function (opts) {
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context.redirected = opts
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// if nuxt generate
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if (!context.res) {
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context.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 === context.url) {
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context.redirected = false
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return
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}
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context.res.writeHead(opts.status, {
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'Location': opts.path
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})
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context.res.end()
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}
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const { app, router<%= (store ? ', store' : '') %> } = await createApp(context)
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const _app = new Vue(app)
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const _noopApp = new Vue({ render: (h) => h('div') })
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// Add store to the context
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<%= (store ? 'context.store = store' : '') %>
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// Add route to the context
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context.route = router.currentRoute
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// Components array (for dynamic components)
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context.hasDynamicComponents = false
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context.components = []
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// Nuxt object
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context.nuxt = { layout: 'default', data: [], error: null<%= (store ? ', state: null' : '') %>, serverRendered: true }
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// Add meta infos
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context.meta = _app.$meta()
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// Error function
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context.error = _app.$options._nuxt.error.bind(_app)
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// Keep asyncData for each matched component in context
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context.asyncData = {}
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<%= (isDev ? 'const s = isDev && Date.now()' : '') %>
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let ctx = getContext(context, app)
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let Components = []
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let promises = getMatchedComponents(router.match(context.url)).map((Component) => {
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return new Promise((resolve, reject) => {
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if (typeof Component !== 'function' || Component.super === Vue) return resolve(sanitizeComponent(Component))
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const _resolve = (Component) => resolve(sanitizeComponent(Component))
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Component().then(_resolve).catch(reject)
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})
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})
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try {
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Components = await Promise.all(promises)
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} catch (err) {
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// Throw back error to renderRoute()
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throw err
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}
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// nuxtServerInit
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<% if (store) { %>
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let promise = (store._actions && store._actions.nuxtServerInit ? store.dispatch('nuxtServerInit', getContext(context, app)) : null)
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if (!promise || (!(promise instanceof Promise) && (typeof promise.then !== 'function'))) promise = Promise.resolve()
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<% } else { %>
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let promise = Promise.resolve()
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<% } %>
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await promise
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// If nuxtServerInit made a redirect
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if (context.redirected) return _noopApp
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// Call global middleware (nuxt.config.js)
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let midd = <%= serialize(router.middleware, { isJSON: true }) %>
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midd = midd.map((name) => {
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if (typeof middleware[name] !== 'function') {
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context.nuxt.error = 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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if (!context.nuxt.error) {
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await middlewareSeries(midd, ctx)
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}
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if (context.redirected) return _noopApp
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// Set layout
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let layout = Components.length ? Components[0].options.layout : NuxtError.layout
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if (typeof layout === 'function') layout = layout(ctx)
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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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context.nuxt.layout = _app.layoutName
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// Call middleware (layout + pages)
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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 middleware[name] !== 'function') {
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context.nuxt.error = 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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if (!context.nuxt.error) {
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await middlewareSeries(midd, ctx)
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}
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if (context.redirected) return _noopApp
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// Call .validate()
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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: context.route.params || {},
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query: context.route.query || {}<%= (store ? ', store: ctx.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 (context._generate) {
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context.nuxt.serverRendered = false
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}
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// Call the 404 error by making the Components array empty
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Components = []
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}
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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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// Create this context for asyncData & fetch (used for dynamic component injection)
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const _this = { components: {} }
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// Call asyncData
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if (Component.options.asyncData && typeof Component.options.asyncData === 'function') {
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let promise = promisify(Component.options.asyncData.bind(_this), ctx)
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// Call asyncData(context)
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promise.then((asyncDataResult) => {
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context.asyncData[Component.options.name] = 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 promises.push(null)
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// Call fetch(context)
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if (Component.options.fetch) promises.push(Component.options.fetch.call(_this, ctx))
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else promises.push(null)
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return Promise.all(promises)
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.then((data) => {
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// If not dyanmic component, return data directly
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if (Object.keys(_this.components).length === 0) return data
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// Sanetize resolved components (Temporary workaround for vue-loader 13.0.0)
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Object.keys(_this.components).forEach(name => {
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_this.components[name] = _this.components[name].default || _this.components[name]
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})
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// Tell renderer that dynamic components has been added
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context.hasDynamicComponents = true
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// Add Component on server side (clone of it)
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Component.options.components = {
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...Component.options.components,
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...clone(_this.components) // Clone it to avoid vue to overwrite references
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}
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// Add components into __NUXT__ for client-side hydration
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// We clone it since vue-server-renderer will update the component definition
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context.components.push(sanitizeDynamicComponents(_this.components))
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// Return data to server-render them
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return data
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})
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}))
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// If no Components found, returns 404
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if (!Components.length) {
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context.nuxt.error = context.error({ statusCode: 404, message: 'This page could not be found.' })
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}
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<% if (isDev) { %>
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if (asyncDatas.length) debug('Data fetching ' + context.url + ': ' + (Date.now() - s) + 'ms')
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<% } %>
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// datas are the first row of each
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context.nuxt.data = asyncDatas.map((r) => (r[0] || {}))
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// If an error occured in the execution
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if (_app.$options._nuxt.err) {
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context.nuxt.error = _app.$options._nuxt.err
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}
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<%= (store ? '// Add the state from the vuex store' : '') %>
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<%= (store ? 'context.nuxt.state = store.state' : '') %>
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// If no error, return main app
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if (!context.nuxt.error) {
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return _app
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}
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// Load layout for error page
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layout = (typeof NuxtError.layout === 'function' ? NuxtError.layout(ctx) : NuxtError.layout)
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context.nuxt.layout = layout || ''
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await _app.loadLayout(layout)
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_app.setLayout(layout)
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return _app
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}
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function sanitizeDynamicComponents(components) {
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Object.keys(components).forEach((name) => {
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const component = components[name]
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// Remove SSR register hookd
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if (Array.isArray(component.beforeCreate)) {
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component.beforeCreate = component.beforeCreate.filter((fn) => fn !== component._ssrRegister)
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if (!component.beforeCreate.length) delete component.beforeCreate
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}
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// Remove SSR & informations properties
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delete component._ssrRegister
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delete component.__file
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if (component.staticRenderFns && !component.staticRenderFns.length) {
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delete component.staticRenderFns
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}
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// Add Component to NUXT.components[i][name]
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components[name] = component
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})
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return clone(components)
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}
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