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global.js, containing a {}, which multiple scripts import and hook things onto, will this leak/bleed into multiple requests to my worker given Node's import caching, or will it be isolated to just the current request?IRM
foo=1, and I want to hook that onto a global object so other files can use it, rather than laboriously having to pass it around to all functions. But the next request may send QS foo=2. Sounds like I'll be OK based on what you say. (But presumably in a non-serverless/Worker environment this would be problematic?)HICMMH
MglobalObject.localStorage wouldn't work? If so, using AsyncLocalStorage, am I right that it would look something like this, to store a global property for later reading downstream?C
K
run takes the object you want to store, and then a callbackMKKMKrun requires the callbackKKMmystore.run({foo: bar}) is insufficient to write to the storage? If so, what would any callback I passed actually "do", if all I want to do is write for later reading?KrunKrun and return my Response thereKasyncLocalStorage.getStore(); to access req, env, ctxMrun()'s callback?MKMfooApi.bar() (in controllers/foo.js) be able to access that stored value.Mcontrollers/foo:KKalsHK
globalThis.als = new AsyncLocalStorage would workKM
globalThis in the first place and bypass ALS?)Hglobal.js{}foo=1foo=2globalObject.localStorageimport { AsyncLocalStorage } from 'node:async_hooks';
const fooStore = new AsyncLocalStorage();
fooStore.run('bar'); //<-- running in some async middlewareimport { AsyncLocalStorage } from 'node:async_hooks';
const fooStore = new AsyncLocalStorage();
const fooVal = fooStore.getStore(); //"bar"runrunrunrunmystore.run({foo: bar})asyncLocalStorage.getStore();run()import fooApi from '../controllers/foo'
router.post('/foo/bar', async req => {
const resp = fooApi.bar(); //e.g. "hello world"
return resp;
})fooApi.bar()controllers/foo.jscontrollers/fooexport default {
bar: () => {
//how to access local storage value in here? I'm not in the middleware's storage.run() callback at this point...
}
};alsglobalThis.als = new AsyncLocalStorageglobalThisimport { AsyncLocalStorage } from "node:async_hooks";
const asyncLocalStorage = new AsyncLocalStorage();
async function doStuff() {
const { req, env, ctx } = asyncLocalStorage.getStore();
const obj = await env.KV.get("foo");
// ...
}
export default {
async fetch(req, env, ctx) {
return asyncLocalStorage.run({ req, env, ctx }, async () => {
await doStuff();
return new Response("Hello World!");
});
},
};export const als = new AsyncLocalStorage();
router.get("/", async () => {
return als.run("foo", async () => {
const resp = foo.bar();
return new Response(resp);
});
});import { als } from ".";
export default {
bar: () => {
return als.getStore();
},
};