next/dist/esm/server/node-environment-extensions/io-utils.js

The React Framework

import { workAsyncStorage } from '../app-render/work-async-storage.external';
import { workUnitAsyncStorage } from '../app-render/work-unit-async-storage.external';
import { abortOnSynchronousPlatformIOAccess } from '../app-render/dynamic-rendering';
import { RenderStage } from '../app-render/staged-rendering';
import { applyOwnerStack } from '../dynamic-rendering-utils';
import { createSyncIOClientError, createSyncIOError, createSyncIORuntimeError } from '../app-render/sync-io-messages';
import { InvariantError } from '../../shared/lib/invariant-error';
export function io(expression, type) {
    const workUnitStore = workUnitAsyncStorage.getStore();
    const workStore = workAsyncStorage.getStore();
    if (!workUnitStore || !workStore) {
        return;
    }
    switch(workUnitStore.type){
        case 'prerender':
        case 'prerender-runtime':
            {
                const prerenderSignal = workUnitStore.controller.signal;
                if (prerenderSignal.aborted === false) {
                    // If the prerender signal is already aborted we don't need to construct
                    // any stacks because something else actually terminated the prerender.
                    // TODO: synchronize this with `stageController`
                    abortOnSynchronousPlatformIOAccess(workStore.route, expression, applyOwnerStack(createSyncIOError(workStore.route, expression, type)), workUnitStore);
                }
                break;
            }
        case 'prerender-client':
            {
                const prerenderSignal = workUnitStore.controller.signal;
                if (prerenderSignal.aborted === false) {
                    // If the prerender signal is already aborted we don't need to construct
                    // any stacks because something else actually terminated the prerender.
                    abortOnSynchronousPlatformIOAccess(workStore.route, expression, applyOwnerStack(createSyncIOClientError(workStore.route, expression, type)), workUnitStore);
                }
                break;
            }
        case 'request':
            {
                const stageController = workUnitStore.stagedRendering;
                if (stageController && stageController.shouldTrackSyncInterrupt()) {
                    let syncIOError;
                    // NOTE: keep stages where we can interrupt in sync with
                    // `shouldTrackSyncInterrupt`/`syncInterruptCurrentStageWithReason`
                    switch(stageController.currentStage){
                        case RenderStage.ShellStatic:
                        case RenderStage.PrefetchStatic_prefetchApi:
                        case RenderStage.PrefetchStatic:
                        case RenderStage.NavigationStatic:
                        case RenderStage.Static:
                            {
                                syncIOError = createSyncIOError(workStore.route, expression, type);
                                break;
                            }
                        case RenderStage.ShellRuntime:
                        case RenderStage.PrefetchRuntime_prefetchApi:
                        case RenderStage.PrefetchRuntime:
                        case RenderStage.NavigationRuntime:
                            {
                                // We're in a runtime stage.
                                // We only error for Sync IO in runtime stages if the route has partialPrefetching enabled.
                                syncIOError = createSyncIORuntimeError(workStore.route, expression, type);
                                break;
                            }
                        case RenderStage.Before:
                        case RenderStage.Dynamic:
                        case RenderStage.Abandoned:
                            {
                                throw new InvariantError(`shouldTrackSyncInterrupt allowed a sync IO interrupt in an unexpected stage: ${RenderStage[stageController.currentStage]}`);
                            }
                    }
                    syncIOError = applyOwnerStack(syncIOError);
                    stageController.syncInterruptCurrentStageWithReason(syncIOError);
                    // A validation render uses a 'request' store type, but may be abortable.
                    // If we're rendering with filled caches, Sync IO is an error and should trigger an abort.
                    if (workUnitStore.controller && !workUnitStore.controller.signal.aborted) {
                        workUnitStore.controller.abort(syncIOError);
                    }
                }
                break;
            }
        case 'validation-client':
        case 'prerender-legacy':
        case 'cache':
        case 'private-cache':
        case 'unstable-cache':
        case 'build-time-generator':
            break;
        default:
            workUnitStore;
    }
}

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