mirror of
https://github.com/terribleplan/next.js.git
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187 lines
5.1 KiB
JavaScript
187 lines
5.1 KiB
JavaScript
import { join } from 'path'
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import { createElement } from 'react'
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import { renderToString, renderToStaticMarkup } from 'react-dom/server'
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import send from 'send'
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import fs from 'mz/fs'
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import accepts from 'accepts'
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import mime from 'mime-types'
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import requireModule from './require'
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import resolvePath from './resolve'
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import readPage from './read-page'
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import { Router } from '../lib/router'
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import Head, { defaultHead } from '../lib/head'
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import App from '../lib/app'
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export async function render (req, res, pathname, query, opts) {
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const html = await renderToHTML(req, res, pathname, opts)
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sendHTML(res, html, req.method)
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}
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export function renderToHTML (req, res, pathname, query, opts) {
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return doRender(req, res, pathname, query, opts)
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}
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export async function renderError (err, req, res, pathname, query, opts) {
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const html = await renderErrorToHTML(err, req, res, query, opts)
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sendHTML(res, html, req.method)
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}
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export function renderErrorToHTML (err, req, res, pathname, query, opts = {}) {
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return doRender(req, res, pathname, query, { ...opts, err, page: '_error' })
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}
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async function doRender (req, res, pathname, query, {
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err,
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page,
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buildId,
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dir = process.cwd(),
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dev = false,
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staticMarkup = false
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} = {}) {
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page = page || pathname
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let [Component, Document] = await Promise.all([
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requireModule(join(dir, '.next', 'dist', 'pages', page)),
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requireModule(join(dir, '.next', 'dist', 'pages', '_document'))
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])
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Component = Component.default || Component
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Document = Document.default || Document
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const ctx = { err, req, res, pathname, query }
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const [
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props,
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component,
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errorComponent
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] = await Promise.all([
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Component.getInitialProps ? Component.getInitialProps(ctx) : {},
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readPage(join(dir, '.next', 'bundles', 'pages', page)),
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readPage(join(dir, '.next', 'bundles', 'pages', '_error'))
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])
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// the response might be finshed on the getinitialprops call
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if (res.finished) return
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const renderPage = () => {
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const app = createElement(App, {
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Component,
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props,
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err,
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router: new Router(pathname, query)
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})
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const render = staticMarkup ? renderToStaticMarkup : renderToString
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let html
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let head
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try {
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html = render(app)
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} finally {
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head = Head.rewind() || defaultHead()
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}
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return { html, head }
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}
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const docProps = await Document.getInitialProps({ ...ctx, renderPage })
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const doc = createElement(Document, {
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__NEXT_DATA__: {
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component,
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errorComponent,
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props,
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pathname,
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query,
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buildId,
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err: (err && dev) ? errorToJSON(err) : null
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},
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dev,
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staticMarkup,
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...docProps
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})
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return '<!DOCTYPE html>' + renderToStaticMarkup(doc)
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}
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export async function renderJSON (req, res, page, { dir = process.cwd() } = {}) {
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const pagePath = await resolvePath(join(dir, '.next', 'bundles', 'pages', page))
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return serveStaticWithGzip(req, res, pagePath)
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}
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export async function renderErrorJSON (err, req, res, { dir = process.cwd(), dev = false } = {}) {
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const component = await readPage(join(dir, '.next', 'bundles', 'pages', '_error'))
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sendJSON(res, {
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component,
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err: err && dev ? errorToJSON(err) : null
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}, req.method)
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}
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export function sendHTML (res, html, method) {
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if (res.finished) return
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res.setHeader('Content-Type', 'text/html')
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res.setHeader('Content-Length', Buffer.byteLength(html))
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res.end(method === 'HEAD' ? null : html)
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}
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export function sendJSON (res, obj, method) {
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if (res.finished) return
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const json = JSON.stringify(obj)
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res.setHeader('Content-Type', 'application/json')
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res.setHeader('Content-Length', Buffer.byteLength(json))
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res.end(method === 'HEAD' ? null : json)
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}
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function errorToJSON (err) {
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const { name, message, stack } = err
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const json = { name, message, stack }
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if (name === 'ModuleBuildError') {
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// webpack compilation error
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const { module: { rawRequest } } = err
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json.module = { rawRequest }
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}
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return json
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}
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export async function serveStaticWithGzip (req, res, path) {
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const encoding = accepts(req).encodings(['gzip'])
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if (encoding !== 'gzip') {
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return serveStatic(req, res, path)
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}
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const gzipPath = `${path}.gz`
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try {
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// We need to check the existance of the gzipPath.
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// Getting `ENOENT` error from the `serveStatic` is inconsistent and
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// didn't work on all the cases.
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//
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// And this won't give us a race condition because we know that
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// we don't add gzipped files at runtime.
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await fs.stat(gzipPath)
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} catch (ex) {
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// Handles the error thrown by fs.stat
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if (ex.code === 'ENOENT') {
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// Seems like there's no gzipped file. Let's serve the uncompressed file.
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return serveStatic(req, res, path)
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}
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throw ex
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}
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const contentType = mime.lookup(path) || 'application/octet-stream'
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res.setHeader('Content-Type', contentType)
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res.setHeader('Content-Encoding', 'gzip')
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return serveStatic(req, res, gzipPath)
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}
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export function serveStatic (req, res, path) {
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return new Promise((resolve, reject) => {
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send(req, path)
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.on('error', reject)
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.pipe(res)
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.on('finish', resolve)
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})
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}
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