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/**
* We extend Web Crypto APIs during builds and revalidates to ensure that prerenders don't observe random bytes
* When cacheComponents is enabled. Random bytes are a form of IO even if they resolve synchronously. When cacheComponents is
* enabled we need to ensure that random bytes are excluded from prerenders unless they are cached.
*
*
* The extensions here never error nor alter the underlying return values and thus should be transparent to callers.
*/
import { io } from './utils'
let webCrypto: typeof crypto
if (process.env.NEXT_RUNTIME === 'edge') {
webCrypto = crypto
} else {
if (typeof crypto === 'undefined') {
// @ts-expect-error -- TODO: Is this actually safe?
webCrypto = (require('node:crypto') as typeof import('node:crypto'))
.webcrypto
} else {
webCrypto = crypto
}
}
const getRandomValuesExpression = '`crypto.getRandomValues()`'
try {
const _getRandomValues = webCrypto.getRandomValues
webCrypto.getRandomValues = function getRandomValues() {
io(getRandomValuesExpression, 'crypto')
return _getRandomValues.apply(webCrypto, arguments as any)
}
} catch {
console.error(
`Failed to install ${getRandomValuesExpression} extension. When using \`experimental.cacheComponents\` calling this function will not correctly trigger dynamic behavior.`
)
}
const randomUUIDExpression = '`crypto.randomUUID()`'
try {
const _randomUUID = webCrypto.randomUUID
webCrypto.randomUUID = function randomUUID() {
io(randomUUIDExpression, 'crypto')
return _randomUUID.apply(webCrypto, arguments as any)
} as typeof _randomUUID
} catch {
console.error(
`Failed to install ${getRandomValuesExpression} extension. When using \`experimental.cacheComponents\` calling this function will not correctly trigger dynamic behavior.`
)
}
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