next
Version:
The React Framework
71 lines (70 loc) • 3.04 kB
JavaScript
import { postponeWithTracking } from '../app-render/dynamic-rendering';
import { workUnitAsyncStorage } from '../app-render/work-unit-async-storage.external';
import { makeHangingPromise } from '../dynamic-rendering-utils';
import { InvariantError } from '../../shared/lib/invariant-error';
export function createServerPathnameForMetadata(underlyingPathname, workStore) {
const workUnitStore = workUnitAsyncStorage.getStore();
if (workUnitStore) {
switch(workUnitStore.type){
case 'prerender':
case 'prerender-client':
case 'prerender-ppr':
case 'prerender-legacy':
{
return createPrerenderPathname(underlyingPathname, workStore, workUnitStore);
}
default:
}
}
return createRenderPathname(underlyingPathname);
}
function createPrerenderPathname(underlyingPathname, workStore, prerenderStore) {
const fallbackParams = workStore.fallbackRouteParams;
if (fallbackParams && fallbackParams.size > 0) {
switch(prerenderStore.type){
case 'prerender':
return makeHangingPromise(prerenderStore.renderSignal, '`pathname`');
case 'prerender-client':
throw Object.defineProperty(new InvariantError('createPrerenderPathname was called inside a client component scope.'), "__NEXT_ERROR_CODE", {
value: "E694",
enumerable: false,
configurable: true
});
case 'prerender-ppr':
return makeErroringPathname(workStore, prerenderStore.dynamicTracking);
break;
default:
return makeErroringPathname(workStore, null);
}
}
// We don't have any fallback params so we have an entirely static safe params object
return Promise.resolve(underlyingPathname);
}
function makeErroringPathname(workStore, dynamicTracking) {
let reject = null;
const promise = new Promise((_, re)=>{
reject = re;
});
const originalThen = promise.then.bind(promise);
// We instrument .then so that we can generate a tracking event only if you actually
// await this promise, not just that it is created.
promise.then = (onfulfilled, onrejected)=>{
if (reject) {
try {
postponeWithTracking(workStore.route, 'metadata relative url resolving', dynamicTracking);
} catch (error) {
reject(error);
reject = null;
}
}
return originalThen(onfulfilled, onrejected);
};
// We wrap in a noop proxy to trick the runtime into thinking it
// isn't a native promise (it's not really). This is so that awaiting
// the promise will call the `then` property triggering the lazy postpone
return new Proxy(promise, {});
}
function createRenderPathname(underlyingPathname) {
return Promise.resolve(underlyingPathname);
}
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