| import crypto from 'crypto' |
| import Document, { Html, Head, Main, NextScript } from 'next/document' |
|
|
| const cspHashOf = (text) => { |
| const hash = crypto.createHash('sha256') |
| hash.update(text) |
| return `'sha256-${hash.digest('base64')}'` |
| } |
|
|
| export default class MyDocument extends Document { |
| static async getInitialProps(ctx) { |
| let options |
|
|
| const enhanceComponent = (Component) => (props) => ( |
| <div> |
| <span id="render-page-enhance-component">RENDERED</span> |
| <Component {...props} /> |
| </div> |
| ) |
| const enhanceApp = (Component) => (props) => ( |
| <div> |
| <span id="render-page-enhance-app">RENDERED</span> |
| <Component {...props} /> |
| </div> |
| ) |
|
|
| if (ctx.query.withEnhancer) { |
| options = enhanceComponent |
| } else if (ctx.query.withEnhanceComponent || ctx.query.withEnhanceApp) { |
| options = {} |
| if (ctx.query.withEnhanceComponent) { |
| options.enhanceComponent = enhanceComponent |
| } |
| if (ctx.query.withEnhanceApp) { |
| options.enhanceApp = enhanceApp |
| } |
| } |
|
|
| const result = await ctx.renderPage(options) |
|
|
| return { |
| ...result, |
| cssInJsCount: (result.html.match(/css-in-js-class/g) || []).length, |
| customProperty: 'Hello Document', |
| withCSP: ctx.query.withCSP, |
| } |
| } |
|
|
| render() { |
| let csp |
| |
| switch (this.props.withCSP) { |
| case 'hash': |
| csp = `default-src 'self'; script-src 'self' ${cspHashOf( |
| NextScript.getInlineScriptSource(this.props) |
| )}; style-src 'self' 'unsafe-inline'` |
| break |
| case 'nonce': |
| csp = `default-src 'self'; script-src 'self' 'nonce-test-nonce'; style-src 'self' 'unsafe-inline'` |
| break |
| } |
|
|
| return ( |
| <Html className="test-html-props"> |
| <Head nonce="test-nonce"> |
| {csp ? ( |
| <meta httpEquiv="Content-Security-Policy" content={csp} /> |
| ) : null} |
| <style>{`body { margin: 0 } `}</style> |
| </Head> |
| <body className="custom_class"> |
| <p id="custom-property">{this.props.customProperty}</p> |
| <p id="document-hmr">Hello Document HMR</p> |
| <Main /> |
| <NextScript nonce="test-nonce" /> |
| <div id="css-in-cjs-count">{this.props.cssInJsCount}</div> |
| </body> |
| </Html> |
| ) |
| } |
| } |
|
|
