mirror of
https://github.com/terribleplan/next.js.git
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317 lines
10 KiB
TypeScript
317 lines
10 KiB
TypeScript
/* eslint-disable import/first */
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import {IncomingMessage, ServerResponse} from 'http'
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import { resolve, join, sep } from 'path'
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import { parse as parseUrl, UrlWithParsedQuery } from 'url'
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import { parse as parseQs, ParsedUrlQuery } from 'querystring'
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import fs from 'fs'
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import {renderToHTML} from './render'
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import {sendHTML} from './send-html'
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import {serveStatic} from './serve-static'
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import Router, {route, Route} from './router'
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import { isInternalUrl, isBlockedPage } from './utils'
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import loadConfig from 'next-server/next-config'
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import {PHASE_PRODUCTION_SERVER, BUILD_ID_FILE, CLIENT_STATIC_FILES_PATH, CLIENT_STATIC_FILES_RUNTIME} from 'next-server/constants'
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import * as envConfig from '../lib/runtime-config'
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import {loadComponents} from './load-components'
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type NextConfig = any
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type ServerConstructor = {
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dir?: string,
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staticMarkup?: boolean,
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quiet?: boolean,
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conf?: NextConfig,
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}
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export default class Server {
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dir: string
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quiet: boolean
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nextConfig: NextConfig
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distDir: string
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buildId: string
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renderOpts: {
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staticMarkup: boolean,
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buildId: string,
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generateEtags: boolean,
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runtimeConfig?: {[key: string]: any},
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assetPrefix?: string,
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}
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router: Router
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public constructor({ dir = '.', staticMarkup = false, quiet = false, conf = null }: ServerConstructor = {}) {
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this.dir = resolve(dir)
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this.quiet = quiet
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const phase = this.currentPhase()
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this.nextConfig = loadConfig(phase, this.dir, conf)
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this.distDir = join(this.dir, this.nextConfig.distDir)
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// Only serverRuntimeConfig needs the default
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// publicRuntimeConfig gets it's default in client/index.js
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const {serverRuntimeConfig = {}, publicRuntimeConfig, assetPrefix, generateEtags} = this.nextConfig
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this.buildId = this.readBuildId()
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this.renderOpts = {
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staticMarkup,
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buildId: this.buildId,
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generateEtags,
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}
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// Only the `publicRuntimeConfig` key is exposed to the client side
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// It'll be rendered as part of __NEXT_DATA__ on the client side
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if (publicRuntimeConfig) {
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this.renderOpts.runtimeConfig = publicRuntimeConfig
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}
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// Initialize next/config with the environment configuration
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envConfig.setConfig({
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serverRuntimeConfig,
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publicRuntimeConfig,
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})
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const routes = this.generateRoutes()
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this.router = new Router(routes)
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this.setAssetPrefix(assetPrefix)
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}
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private currentPhase(): string {
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return PHASE_PRODUCTION_SERVER
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}
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private logError(...args: any): void {
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if (this.quiet) return
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// tslint:disable-next-line
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console.error(...args)
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}
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private handleRequest(req: IncomingMessage, res: ServerResponse, parsedUrl?: UrlWithParsedQuery): Promise<void> {
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// Parse url if parsedUrl not provided
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if (!parsedUrl || typeof parsedUrl !== 'object') {
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const url: any = req.url
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parsedUrl = parseUrl(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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this.logError(err)
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res.statusCode = 500
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res.end('Internal Server Error')
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})
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}
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public getRequestHandler() {
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return this.handleRequest.bind(this)
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}
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public setAssetPrefix(prefix?: string) {
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this.renderOpts.assetPrefix = prefix ? prefix.replace(/\/$/, '') : ''
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}
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// Backwards compatibility
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public async prepare(): Promise<void> {}
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// Backwards compatibility
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private async close(): Promise<void> {}
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private setImmutableAssetCacheControl(res: ServerResponse) {
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res.setHeader('Cache-Control', 'public, max-age=31536000, immutable')
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}
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private generateRoutes(): Route[] {
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const routes: Route[] = [
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{
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match: route('/_next/static/:path*'),
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fn: async (req, res, params, parsedUrl) => {
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// The commons folder holds commonschunk files
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// The chunks folder holds dynamic entries
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// The buildId folder holds pages and potentially other assets. As buildId changes per build it can be long-term cached.
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if (params.path[0] === CLIENT_STATIC_FILES_RUNTIME || params.path[0] === 'chunks' || params.path[0] === this.buildId) {
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this.setImmutableAssetCacheControl(res)
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}
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const p = join(this.distDir, CLIENT_STATIC_FILES_PATH, ...(params.path || []))
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await this.serveStatic(req, res, p, parsedUrl)
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},
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},
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{
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match: route('/_next/:path*'),
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// This path is needed because `render()` does a check for `/_next` and the calls the routing again
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fn: async (req, res, _params, parsedUrl) => {
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await this.render404(req, res, parsedUrl)
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},
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},
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{
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// It's very important to keep this route's param optional.
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// (but it should support as many params as needed, separated by '/')
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// Otherwise this will lead to a pretty simple DOS attack.
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// See more: https://github.com/zeit/next.js/issues/2617
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match: route('/static/:path*'),
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fn: async (req, res, params, parsedUrl) => {
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const p = join(this.dir, 'static', ...(params.path || []))
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await this.serveStatic(req, res, p, parsedUrl)
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},
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},
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]
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if (this.nextConfig.useFileSystemPublicRoutes) {
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// It's very important to keep this route's param optional.
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// (but it should support as many params as needed, separated by '/')
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// Otherwise this will lead to a pretty simple DOS attack.
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// See more: https://github.com/zeit/next.js/issues/2617
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routes.push({
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match: route('/:path*'),
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fn: async (req, res, _params, parsedUrl) => {
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const { pathname, query } = parsedUrl
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if (!pathname) {
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throw new Error('pathname is undefined')
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}
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await this.render(req, res, pathname, query, parsedUrl)
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},
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})
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}
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return routes
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}
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private async run(req: IncomingMessage, res: ServerResponse, parsedUrl: UrlWithParsedQuery) {
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try {
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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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} catch (err) {
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if (err.code === 'DECODE_FAILED') {
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res.statusCode = 400
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return this.renderError(null, req, res, '/_error', {})
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}
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throw err
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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('Not Implemented')
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}
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}
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private async sendHTML(req: IncomingMessage, res: ServerResponse, html: string) {
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const {generateEtags} = this.renderOpts
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return sendHTML(req, res, html, {generateEtags})
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}
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public async render(req: IncomingMessage, res: ServerResponse, pathname: string, query: ParsedUrlQuery = {}, parsedUrl?: UrlWithParsedQuery): Promise<void> {
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const url: any = req.url
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if (isInternalUrl(url)) {
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return this.handleRequest(req, res, parsedUrl)
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}
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if (isBlockedPage(pathname)) {
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return this.render404(req, res, parsedUrl)
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}
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const html = await this.renderToHTML(req, res, pathname, query)
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// Request was ended by the user
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if (html === null) {
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return
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}
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if (this.nextConfig.poweredByHeader) {
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res.setHeader('X-Powered-By', 'Next.js ' + process.env.NEXT_VERSION)
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}
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return this.sendHTML(req, res, html)
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}
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private async renderToHTMLWithComponents(req: IncomingMessage, res: ServerResponse, pathname: string, query: ParsedUrlQuery = {}, opts: any) {
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const result = await loadComponents(this.distDir, this.buildId, pathname)
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return renderToHTML(req, res, pathname, query, {...result, ...opts})
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}
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public async renderToHTML(req: IncomingMessage, res: ServerResponse, pathname: string, query: ParsedUrlQuery = {}): Promise<string|null> {
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try {
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// To make sure the try/catch is executed
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const html = await this.renderToHTMLWithComponents(req, res, pathname, query, this.renderOpts)
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return html
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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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this.logError(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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public async renderError(err: Error|null, req: IncomingMessage, res: ServerResponse, pathname: string, query: ParsedUrlQuery = {}): Promise<void> {
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res.setHeader('Cache-Control', 'no-cache, no-store, max-age=0, must-revalidate')
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const html = await this.renderErrorToHTML(err, req, res, pathname, query)
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if (html === null) {
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return
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}
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return this.sendHTML(req, res, html)
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}
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public async renderErrorToHTML(err: Error|null, req: IncomingMessage, res: ServerResponse, _pathname: string, query: ParsedUrlQuery = {}) {
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return this.renderToHTMLWithComponents(req, res, '/_error', query, {...this.renderOpts, err})
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}
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public async render404(req: IncomingMessage, res: ServerResponse, parsedUrl?: UrlWithParsedQuery): Promise<void> {
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const url: any = req.url
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const { pathname, query } = parsedUrl ? parsedUrl : parseUrl(url, true)
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if (!pathname) {
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throw new Error('pathname is undefined')
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}
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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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public async serveStatic(req: IncomingMessage, res: ServerResponse, path: string, parsedUrl?: UrlWithParsedQuery): Promise<void> {
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if (!this.isServeableUrl(path)) {
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return this.render404(req, res, parsedUrl)
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}
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try {
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await serveStatic(req, res, path)
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} catch (err) {
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if (err.code === 'ENOENT' || err.statusCode === 404) {
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this.render404(req, res, parsedUrl)
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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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private isServeableUrl(path: string): boolean {
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const resolved = resolve(path)
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if (
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resolved.indexOf(join(this.distDir) + 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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private readBuildId(): string {
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const buildIdFile = join(this.distDir, BUILD_ID_FILE)
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try {
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return fs.readFileSync(buildIdFile, 'utf8').trim()
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} catch (err) {
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if (!fs.existsSync(buildIdFile)) {
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throw new Error(`Could not find a valid build in the '${this.distDir}' directory! Try building your app with 'next build' before starting the server.`)
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}
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throw err
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}
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}
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}
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