mirror of
https://github.com/terribleplan/next.js.git
synced 2024-01-19 02:48:18 +00:00
394 lines
11 KiB
JavaScript
394 lines
11 KiB
JavaScript
import { resolve, join, sep } from 'path'
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import { parse as parseUrl } from 'url'
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import { parse as parseQs } from 'querystring'
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import fs from 'fs'
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import http, { STATUS_CODES } from 'http'
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import {
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renderToHTML,
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renderErrorToHTML,
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sendHTML,
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serveStatic,
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renderScript,
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renderScriptError
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} from './render'
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import Router from './router'
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import HotReloader from './hot-reloader'
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import { resolveFromList } from './resolve'
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import { getAvailableChunks } from './utils'
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import getConfig from './config'
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// We need to go up one more level since we are in the `dist` directory
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import pkg from '../../package'
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const internalPrefixes = [
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/^\/_next\//,
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/^\/static\//
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]
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export default class Server {
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constructor ({ dir = '.', dev = false, staticMarkup = false, quiet = false, conf = null } = {}) {
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this.dir = resolve(dir)
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this.dev = dev
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this.quiet = quiet
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this.router = new Router()
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this.hotReloader = dev ? new HotReloader(this.dir, { quiet, conf }) : null
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this.http = null
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this.config = getConfig(this.dir, conf)
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this.dist = this.config.distDir
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this.buildStats = !dev ? require(join(this.dir, this.dist, 'build-stats.json')) : null
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this.buildId = !dev ? this.readBuildId() : '-'
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this.renderOpts = {
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dev,
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staticMarkup,
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dir: this.dir,
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hotReloader: this.hotReloader,
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buildStats: this.buildStats,
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buildId: this.buildId,
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assetPrefix: this.config.assetPrefix.replace(/\/$/, ''),
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availableChunks: dev ? {} : getAvailableChunks(this.dir, this.dist)
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}
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this.defineRoutes()
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}
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handleRequest (req, res, parsedUrl) {
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// Parse url if parsedUrl not provided
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if (!parsedUrl) {
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parsedUrl = parseUrl(req.url, true)
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}
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// Parse the querystring ourselves if the user doesn't handle querystring parsing
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if (typeof parsedUrl.query === 'string') {
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parsedUrl.query = parseQs(parsedUrl.query)
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}
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res.statusCode = 200
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return this.run(req, res, parsedUrl)
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.catch((err) => {
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if (!this.quiet) console.error(err)
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res.statusCode = 500
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res.end(STATUS_CODES[500])
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})
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}
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getRequestHandler () {
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return this.handleRequest.bind(this)
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}
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async prepare () {
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if (this.hotReloader) {
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await this.hotReloader.start()
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}
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}
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async close () {
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if (this.hotReloader) {
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await this.hotReloader.stop()
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}
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if (this.http) {
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await new Promise((resolve, reject) => {
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this.http.close((err) => {
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if (err) return reject(err)
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return resolve()
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})
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})
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}
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}
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defineRoutes () {
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const routes = {
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'/_next-prefetcher.js': async (req, res, params) => {
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const p = join(__dirname, '../client/next-prefetcher-bundle.js')
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await this.serveStatic(req, res, p)
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},
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// This is to support, webpack dynamic imports in production.
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'/_next/webpack/chunks/:name': async (req, res, params) => {
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res.setHeader('Cache-Control', 'max-age=365000000, immutable')
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const p = join(this.dir, '.next', 'chunks', params.name)
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await this.serveStatic(req, res, p)
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},
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// This is to support, webpack dynamic import support with HMR
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'/_next/webpack/:id': async (req, res, params) => {
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const p = join(this.dir, '.next', 'chunks', params.id)
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await this.serveStatic(req, res, p)
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},
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'/_next/:hash/manifest.js': async (req, res, params) => {
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if (!this.dev) return this.send404(res)
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this.handleBuildHash('manifest.js', params.hash, res)
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const p = join(this.dir, `${this.dist}/manifest.js`)
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await this.serveStatic(req, res, p)
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},
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'/_next/:hash/main.js': async (req, res, params) => {
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if (!this.dev) return this.send404(res)
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this.handleBuildHash('main.js', params.hash, res)
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const p = join(this.dir, `${this.dist}/main.js`)
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await this.serveStatic(req, res, p)
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},
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'/_next/:hash/commons.js': async (req, res, params) => {
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if (!this.dev) return this.send404(res)
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this.handleBuildHash('commons.js', params.hash, res)
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const p = join(this.dir, `${this.dist}/commons.js`)
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await this.serveStatic(req, res, p)
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},
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'/_next/:hash/app.js': async (req, res, params) => {
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if (this.dev) return this.send404(res)
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this.handleBuildHash('app.js', params.hash, res)
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const p = join(this.dir, `${this.dist}/app.js`)
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await this.serveStatic(req, res, p)
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},
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'/_next/:buildId/page/_error*': async (req, res, params) => {
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if (!this.handleBuildId(params.buildId, res)) {
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const error = new Error('INVALID_BUILD_ID')
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const customFields = { buildIdMismatched: true }
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return await renderScriptError(req, res, '/_error', error, customFields, this.renderOpts)
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}
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const p = join(this.dir, `${this.dist}/bundles/pages/_error.js`)
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await this.serveStatic(req, res, p)
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},
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'/_next/:buildId/page/:path*': async (req, res, params) => {
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const paths = params.path || ['']
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const page = `/${paths.join('/')}`
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if (!this.handleBuildId(params.buildId, res)) {
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const error = new Error('INVALID_BUILD_ID')
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const customFields = { buildIdMismatched: true }
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return await renderScriptError(req, res, page, error, customFields, this.renderOpts)
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}
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if (this.dev) {
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try {
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await this.hotReloader.ensurePage(page)
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} catch (error) {
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return await renderScriptError(req, res, page, error, {}, this.renderOpts)
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}
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const compilationErr = await this.getCompilationError(page, req, res)
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if (compilationErr) {
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const customFields = { statusCode: 500 }
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return await renderScriptError(req, res, page, compilationErr, customFields, this.renderOpts)
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}
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}
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await renderScript(req, res, page, this.renderOpts)
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},
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'/_next/:path+': async (req, res, params) => {
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const p = join(__dirname, '..', 'client', ...(params.path || []))
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await this.serveStatic(req, res, p)
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},
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'/static/:path+': async (req, res, params) => {
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const p = join(this.dir, 'static', ...(params.path || []))
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await this.serveStatic(req, res, p)
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}
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}
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if (this.config.useFileSystemPublicRoutes) {
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routes['/:path*'] = async (req, res, params, parsedUrl) => {
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const { pathname, query } = parsedUrl
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await this.render(req, res, pathname, query)
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}
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}
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for (const method of ['GET', 'HEAD']) {
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for (const p of Object.keys(routes)) {
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this.router.add(method, p, routes[p])
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}
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}
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}
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async start (port, hostname) {
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await this.prepare()
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this.http = http.createServer(this.getRequestHandler())
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await new Promise((resolve, reject) => {
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// This code catches EADDRINUSE error if the port is already in use
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this.http.on('error', reject)
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this.http.on('listening', () => resolve())
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this.http.listen(port, hostname)
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})
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}
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async run (req, res, parsedUrl) {
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if (this.hotReloader) {
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await this.hotReloader.run(req, res)
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}
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const fn = this.router.match(req, res, parsedUrl)
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if (fn) {
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await fn()
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return
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}
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if (req.method === 'GET' || req.method === 'HEAD') {
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await this.render404(req, res, parsedUrl)
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} else {
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res.statusCode = 501
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res.end(STATUS_CODES[501])
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}
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}
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async render (req, res, pathname, query, parsedUrl) {
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if (this.isInternalUrl(req)) {
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return this.handleRequest(req, res, parsedUrl)
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}
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if (this.config.poweredByHeader) {
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res.setHeader('X-Powered-By', `Next.js ${pkg.version}`)
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}
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const html = await this.renderToHTML(req, res, pathname, query)
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return sendHTML(req, res, html, req.method, this.renderOpts)
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}
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async renderToHTML (req, res, pathname, query) {
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if (this.dev) {
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const compilationErr = await this.getCompilationError(pathname)
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if (compilationErr) {
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res.statusCode = 500
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return this.renderErrorToHTML(compilationErr, req, res, pathname, query)
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}
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}
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try {
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return await renderToHTML(req, res, pathname, query, this.renderOpts)
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} catch (err) {
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if (err.code === 'ENOENT') {
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res.statusCode = 404
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return this.renderErrorToHTML(null, req, res, pathname, query)
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} else {
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if (!this.quiet) console.error(err)
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res.statusCode = 500
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return this.renderErrorToHTML(err, req, res, pathname, query)
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}
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}
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}
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async renderError (err, req, res, pathname, query) {
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const html = await this.renderErrorToHTML(err, req, res, pathname, query)
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return sendHTML(req, res, html, req.method, this.renderOpts)
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}
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async renderErrorToHTML (err, req, res, pathname, query) {
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if (this.dev) {
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const compilationErr = await this.getCompilationError('/_error')
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if (compilationErr) {
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res.statusCode = 500
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return renderErrorToHTML(compilationErr, req, res, pathname, query, this.renderOpts)
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}
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}
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try {
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return await renderErrorToHTML(err, req, res, pathname, query, this.renderOpts)
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} catch (err2) {
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if (this.dev) {
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if (!this.quiet) console.error(err2)
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res.statusCode = 500
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return renderErrorToHTML(err2, req, res, pathname, query, this.renderOpts)
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} else {
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throw err2
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}
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}
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}
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async render404 (req, res, parsedUrl = parseUrl(req.url, true)) {
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const { pathname, query } = parsedUrl
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res.statusCode = 404
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return this.renderError(null, req, res, pathname, query)
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}
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async serveStatic (req, res, path) {
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if (!this.isServeableUrl(path)) {
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return this.render404(req, res)
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}
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try {
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return await serveStatic(req, res, path)
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} catch (err) {
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if (err.code === 'ENOENT') {
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this.render404(req, res)
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} else {
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throw err
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}
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}
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}
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isServeableUrl (path) {
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const resolved = resolve(path)
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if (
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resolved.indexOf(join(this.dir, this.dist) + sep) !== 0 &&
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resolved.indexOf(join(this.dir, 'static') + sep) !== 0
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) {
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// Seems like the user is trying to traverse the filesystem.
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return false
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}
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return true
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}
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isInternalUrl (req) {
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for (const prefix of internalPrefixes) {
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if (prefix.test(req.url)) {
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return true
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}
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}
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return false
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}
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readBuildId () {
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const buildIdPath = join(this.dir, this.dist, 'BUILD_ID')
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const buildId = fs.readFileSync(buildIdPath, 'utf8')
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return buildId.trim()
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}
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handleBuildId (buildId, res) {
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if (this.dev) return true
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if (buildId !== this.renderOpts.buildId) {
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return false
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}
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res.setHeader('Cache-Control', 'max-age=365000000, immutable')
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return true
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}
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async getCompilationError (page, req, res) {
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if (!this.hotReloader) return
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const errors = await this.hotReloader.getCompilationErrors()
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if (!errors.size) return
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const id = join(this.dir, this.dist, 'bundles', 'pages', page)
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const p = resolveFromList(id, errors.keys())
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if (p) return errors.get(p)[0]
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}
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handleBuildHash (filename, hash, res) {
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if (this.dev) return
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if (hash !== this.buildStats[filename].hash) {
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throw new Error(`Invalid Build File Hash(${hash}) for chunk: ${filename}`)
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}
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res.setHeader('Cache-Control', 'max-age=365000000, immutable')
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}
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send404 (res) {
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res.statusCode = 404
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res.end('404 - Not Found')
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}
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}
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