forked from vercel/next.js
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next.ts
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/
next.ts
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import type { Options as DevServerOptions } from './dev/next-dev-server'
import type { NodeRequestHandler } from './next-server'
import type { UrlWithParsedQuery } from 'url'
import './node-polyfill-fetch'
import { default as Server } from './next-server'
import * as log from '../build/output/log'
import loadConfig from './config'
import { resolve } from 'path'
import { NON_STANDARD_NODE_ENV } from '../lib/constants'
import { PHASE_DEVELOPMENT_SERVER } from '../shared/lib/constants'
import { PHASE_PRODUCTION_SERVER } from '../shared/lib/constants'
import { IncomingMessage, ServerResponse } from 'http'
import { NextUrlWithParsedQuery } from './request-meta'
import { shouldUseReactRoot } from './utils'
let ServerImpl: typeof Server
const getServerImpl = async () => {
if (ServerImpl === undefined)
ServerImpl = (await Promise.resolve(require('./next-server'))).default
return ServerImpl
}
export type NextServerOptions = Partial<DevServerOptions>
export interface RequestHandler {
(
req: IncomingMessage,
res: ServerResponse,
parsedUrl?: NextUrlWithParsedQuery | undefined
): Promise<void>
}
export class NextServer {
private serverPromise?: Promise<Server>
private server?: Server
private reqHandlerPromise?: Promise<NodeRequestHandler>
private preparedAssetPrefix?: string
public options: NextServerOptions
constructor(options: NextServerOptions) {
this.options = options
}
get hostname() {
return this.options.hostname
}
get port() {
return this.options.port
}
getRequestHandler(): RequestHandler {
return async (
req: IncomingMessage,
res: ServerResponse,
parsedUrl?: UrlWithParsedQuery
) => {
const requestHandler = await this.getServerRequestHandler()
return requestHandler(req, res, parsedUrl)
}
}
getUpgradeHandler() {
return async (req: IncomingMessage, socket: any, head: any) => {
const server = await this.getServer()
// @ts-expect-error we mark this as protected so it
// causes an error here
return server.handleUpgrade.apply(server, [req, socket, head])
}
}
setAssetPrefix(assetPrefix: string) {
if (this.server) {
this.server.setAssetPrefix(assetPrefix)
} else {
this.preparedAssetPrefix = assetPrefix
}
}
logError(...args: Parameters<Server['logError']>) {
if (this.server) {
this.server.logError(...args)
}
}
async render(...args: Parameters<Server['render']>) {
const server = await this.getServer()
return server.render(...args)
}
async renderToHTML(...args: Parameters<Server['renderToHTML']>) {
const server = await this.getServer()
return server.renderToHTML(...args)
}
async renderError(...args: Parameters<Server['renderError']>) {
const server = await this.getServer()
return server.renderError(...args)
}
async renderErrorToHTML(...args: Parameters<Server['renderErrorToHTML']>) {
const server = await this.getServer()
return server.renderErrorToHTML(...args)
}
async render404(...args: Parameters<Server['render404']>) {
const server = await this.getServer()
return server.render404(...args)
}
async serveStatic(...args: Parameters<Server['serveStatic']>) {
const server = await this.getServer()
return server.serveStatic(...args)
}
async prepare() {
const server = await this.getServer()
return server.prepare()
}
async close() {
const server = await this.getServer()
return (server as any).close()
}
private async createServer(options: DevServerOptions): Promise<Server> {
if (options.dev) {
const DevServer = require('./dev/next-dev-server').default
return new DevServer(options)
}
const ServerImplementation = await getServerImpl()
return new ServerImplementation(options)
}
private async loadConfig() {
return loadConfig(
this.options.dev ? PHASE_DEVELOPMENT_SERVER : PHASE_PRODUCTION_SERVER,
resolve(this.options.dir || '.'),
this.options.conf
)
}
private async getServer() {
if (!this.serverPromise) {
setTimeout(getServerImpl, 10)
this.serverPromise = this.loadConfig().then(async (conf) => {
this.server = await this.createServer({
...this.options,
conf,
})
if (this.preparedAssetPrefix) {
this.server.setAssetPrefix(this.preparedAssetPrefix)
}
return this.server
})
}
return this.serverPromise
}
private async getServerRequestHandler() {
// Memoize request handler creation
if (!this.reqHandlerPromise) {
this.reqHandlerPromise = this.getServer().then((server) =>
server.getRequestHandler().bind(server)
)
}
return this.reqHandlerPromise
}
}
// This file is used for when users run `require('next')`
function createServer(options: NextServerOptions): NextServer {
if (options == null) {
throw new Error(
'The server has not been instantiated properly. https://nextjs.org/docs/messages/invalid-server-options'
)
}
if (
!('isNextDevCommand' in options) &&
process.env.NODE_ENV &&
!['production', 'development', 'test'].includes(process.env.NODE_ENV)
) {
log.warn(NON_STANDARD_NODE_ENV)
}
if (options.dev && typeof options.dev !== 'boolean') {
console.warn(
"Warning: 'dev' is not a boolean which could introduce unexpected behavior. https://nextjs.org/docs/messages/invalid-server-options"
)
}
if (shouldUseReactRoot) {
;(process.env as any).__NEXT_REACT_ROOT = 'true'
}
return new NextServer(options)
}
// Support commonjs `require('next')`
module.exports = createServer
exports = module.exports
// Support `import next from 'next'`
export default createServer