react-code-dataset / next.js /packages /next /src /server /after /builtin-request-context.ts

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import { createAsyncLocalStorage } from '../app-render/async-local-storage'

export function getBuiltinRequestContext():
  | BuiltinRequestContextValue
  | undefined {
  const _globalThis = globalThis as GlobalThisWithRequestContext
  const ctx = _globalThis[NEXT_REQUEST_CONTEXT_SYMBOL]
  return ctx?.get()
}

const NEXT_REQUEST_CONTEXT_SYMBOL = Symbol.for('@next/request-context')

type GlobalThisWithRequestContext = typeof globalThis & {
  [NEXT_REQUEST_CONTEXT_SYMBOL]?: BuiltinRequestContext
}

/** A request context provided by the platform. */
export type BuiltinRequestContext = {
  get(): BuiltinRequestContextValue | undefined
}

export type RunnableBuiltinRequestContext = BuiltinRequestContext & {
  run<T>(value: BuiltinRequestContextValue, callback: () => T): T
}

export type BuiltinRequestContextValue = {
  waitUntil?: WaitUntil
}
export type WaitUntil = (promise: Promise<any>) => void

/** "@next/request-context" has a different signature from AsyncLocalStorage,
 * matching [AsyncContext.Variable](https://github.com/tc39/proposal-async-context).
 * We don't need a full AsyncContext adapter here, just having `.get()` is enough
 */
export function createLocalRequestContext(): RunnableBuiltinRequestContext {
  const storage = createAsyncLocalStorage<BuiltinRequestContextValue>()
  return {
    get: () => storage.getStore(),
    run: (value, callback) => storage.run(value, callback),
  }
}

	import { createAsyncLocalStorage } from '../app-render/async-local-storage'

	export function getBuiltinRequestContext():
	\| BuiltinRequestContextValue
	\| undefined {
	const _globalThis = globalThis as GlobalThisWithRequestContext
	const ctx = _globalThis[NEXT_REQUEST_CONTEXT_SYMBOL]
	return ctx?.get()
	}

	const NEXT_REQUEST_CONTEXT_SYMBOL = Symbol.for('@next/request-context')

	type GlobalThisWithRequestContext = typeof globalThis & {
	[NEXT_REQUEST_CONTEXT_SYMBOL]?: BuiltinRequestContext
	}

	/** A request context provided by the platform. */
	export type BuiltinRequestContext = {
	get(): BuiltinRequestContextValue \| undefined
	}

	export type RunnableBuiltinRequestContext = BuiltinRequestContext & {
	run<T>(value: BuiltinRequestContextValue, callback: () => T): T
	}

	export type BuiltinRequestContextValue = {
	waitUntil?: WaitUntil
	}
	export type WaitUntil = (promise: Promise<any>) => void

	/** "@next/request-context" has a different signature from AsyncLocalStorage,
	* matching [AsyncContext.Variable](https://github.com/tc39/proposal-async-context).
	* We don't need a full AsyncContext adapter here, just having `.get()` is enough
	*/
	export function createLocalRequestContext(): RunnableBuiltinRequestContext {
	const storage = createAsyncLocalStorage<BuiltinRequestContextValue>()
	return {
	get: () => storage.getStore(),
	run: (value, callback) => storage.run(value, callback),
	}
	}