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convert use-flight-response and try to tee Readable
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19 changes: 19 additions & 0 deletions
19
packages/next/src/server/app-render/use-flight-response/index.d.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| import type { Readable } from 'node:stream' | ||
| import type { DeepReadonly } from '../../../shared/lib/deep-readonly' | ||
| import type { ClientReferenceManifest } from '../../../build/webpack/plugins/flight-manifest-plugin' | ||
|
|
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| export function useFlightStream<T>( | ||
| flightStream: Readable | ReadableStream<Uint8Array>, | ||
| clientReferenceManifest: DeepReadonly<ClientReferenceManifest>, | ||
| nonce?: string | ||
| ): Promise<T> | ||
|
|
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| export function flightRenderComplete( | ||
| flightStream: Readable | ReadableStream<Uint8Array> | ||
| ): Promise<void> | ||
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| export function createInlinedDataReadableStream( | ||
| flightStream: Readable | ReadableStream<Uint8Array>, | ||
| nonce: string | undefined, | ||
| formState: unknown | null | ||
| ): Readable | ReadableStream<Uint8Array> |
8 changes: 8 additions & 0 deletions
8
packages/next/src/server/app-render/use-flight-response/index.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| if ( | ||
| process.env.NEXT_RUNTIME === 'nodejs' && | ||
| process.env.EXPERIMENTAL_NODE_STREAMS_SUPPORT === '1' | ||
| ) { | ||
| module.exports = require('./use-flight-response.node.js') | ||
| } else { | ||
| module.exports = require('./use-flight-response.edge.js') | ||
| } |
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152 changes: 152 additions & 0 deletions
152
packages/next/src/server/app-render/use-flight-response/use-flight-response.node.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| import { Readable } from 'node:stream' | ||
| import type { ClientReferenceManifest } from '../../../build/webpack/plugins/flight-manifest-plugin' | ||
| import type { DeepReadonly } from '../../../shared/lib/deep-readonly' | ||
| import { htmlEscapeJsonString } from '../../htmlescape' | ||
| import isError from '../../../lib/is-error' | ||
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| const flightResponses = new WeakMap<Readable, Promise<any>>() | ||
| const encoder = new TextEncoder() | ||
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| export function useFlightStream<T>( | ||
| flightStream: Readable, | ||
| clientReferenceManifest: DeepReadonly<ClientReferenceManifest>, | ||
| nonce?: string | ||
| ): Promise<T> { | ||
| const response = flightResponses.get(flightStream) | ||
|
|
||
| if (response) { | ||
| return response | ||
| } | ||
|
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| // react-server-dom-webpack/client.edge must not be hoisted for require cache clearing to work correctly | ||
| let createFromStream | ||
| // @TODO: investigate why the aliasing for turbopack doesn't pick this up, requiring this runtime check | ||
| if (process.env.TURBOPACK) { | ||
| createFromStream = | ||
| // eslint-disable-next-line import/no-extraneous-dependencies | ||
| require('react-server-dom-turbopack/client.node').createFromNodeStream | ||
| } else { | ||
| createFromStream = | ||
| // eslint-disable-next-line import/no-extraneous-dependencies | ||
| require('react-server-dom-webpack/client.node').createFromNodeStream | ||
| } | ||
|
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| const newResponse = createFromStream(flightStream, { | ||
| ssrManifest: { | ||
| moduleLoading: clientReferenceManifest.moduleLoading, | ||
| moduleMap: clientReferenceManifest.ssrModuleMapping, | ||
| }, | ||
| nonce, | ||
| }) | ||
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| flightResponses.set(flightStream, newResponse) | ||
|
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| return newResponse | ||
| } | ||
|
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| export function flightRenderComplete(flightStream: Readable): Promise<void> { | ||
| return new Promise((resolve, reject) => { | ||
| flightStream | ||
| .resume() | ||
| .on('end', () => { | ||
| resolve() | ||
| }) | ||
| .on('error', (error) => { | ||
| reject(error) | ||
| }) | ||
| }) | ||
| } | ||
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| const INLINE_FLIGHT_PAYLOAD_BOOTSTRAP = 0 | ||
| const INLINE_FLIGHT_PAYLOAD_DATA = 1 | ||
| const INLINE_FLIGHT_PAYLOAD_FORM_STATE = 2 | ||
| const INLINE_FLIGHT_PAYLOAD_BINARY = 3 | ||
|
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| export function createInlinedDataReadableStream( | ||
| flightStream: Readable, | ||
| nonce: string | undefined, | ||
| formState: unknown | null | ||
| ): Readable { | ||
| const startScriptTag = nonce | ||
| ? `<script nonce=${JSON.stringify(nonce)}>` | ||
| : '<script>' | ||
|
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| const decoder = new TextDecoder('utf-8', { fatal: true }) | ||
|
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| if (flightStream.readableFlowing) { | ||
| flightStream.pause() | ||
| } | ||
|
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| return new Readable({ | ||
| construct(callback) { | ||
| try { | ||
| const chunk = encoder.encode( | ||
| `${startScriptTag}(self.__next_f=self.__next_f||[]).push(${htmlEscapeJsonString( | ||
| JSON.stringify([INLINE_FLIGHT_PAYLOAD_BOOTSTRAP]) | ||
| )});self.__next_f.push(${htmlEscapeJsonString( | ||
| JSON.stringify([INLINE_FLIGHT_PAYLOAD_FORM_STATE, formState]) | ||
| )})</script>` | ||
| ) | ||
| this.push(chunk) | ||
| return callback(null) | ||
| } catch (error) { | ||
| return isError(error) ? callback(error) : callback() | ||
| } | ||
| }, | ||
| read() { | ||
| try { | ||
| const chunk = flightStream.read() | ||
| if (chunk) { | ||
| try { | ||
| const decodedString = decoder.decode(chunk, { stream: true }) | ||
| writeFlightDataInstruction(this, startScriptTag, decodedString) | ||
| } catch { | ||
| writeFlightDataInstruction(this, startScriptTag, chunk) | ||
| } | ||
| } else { | ||
| try { | ||
| const decodedString = decoder.decode() | ||
| if (decodedString) { | ||
| writeFlightDataInstruction(this, startScriptTag, decodedString) | ||
| } | ||
| } catch {} | ||
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| this.push(null) | ||
| } | ||
| } catch (error) { | ||
| if (isError(error)) { | ||
| this.destroy(error) | ||
| } | ||
| } | ||
| }, | ||
| }) | ||
| } | ||
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| function writeFlightDataInstruction( | ||
| readable: Readable, | ||
| scriptStart: string, | ||
| chunk: string | Uint8Array | ||
| ) { | ||
| let htmlInlinedData: string | ||
|
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| if (typeof chunk === 'string') { | ||
| htmlInlinedData = htmlEscapeJsonString( | ||
| JSON.stringify([INLINE_FLIGHT_PAYLOAD_DATA, chunk]) | ||
| ) | ||
| } else { | ||
| // The chunk cannot be embedded as a UTF-8 string in the script tag. | ||
| // Instead let's inline it in base64. | ||
| // Credits to Devon Govett (devongovett) for the technique. | ||
| // https://github.com/devongovett/rsc-html-stream | ||
| const base64 = btoa(String.fromCodePoint(...chunk)) | ||
| htmlInlinedData = htmlEscapeJsonString( | ||
| JSON.stringify([INLINE_FLIGHT_PAYLOAD_BINARY, base64]) | ||
| ) | ||
| } | ||
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| readable.push( | ||
| encoder.encode( | ||
| `${scriptStart}self.__next_f.push(${htmlInlinedData})</script>` | ||
| ) | ||
| ) | ||
| } |
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