Access undici's lib - Agent, Dispatcher, etc.

[joematune]

I'm interested in providing a dispatcher option for my fetch calls instead of using the global dispatcher.

Are these classes purposefully not being exported or have I missed something?

I see that internally the globals are exported:

node --expose-internals -e "console.log(require('node:internal/deps/undici/undici'))"
{
  fetch: [Function: fetch],
  FormData: [class FormData],
  Headers: [class Headers],
  Response: [class Response] {
    error: [Function: error],
    json: [Function: json],
    redirect: [Function: redirect]
  },
  Request: [class Request],
  WebSocket: [class WebSocket extends EventTarget] {
    CONNECTING: 0,
    OPEN: 1,
    CLOSING: 2,
    CLOSED: 3
  }
}

I was hoping for undici to become an exposed package, i.e. import from 'node:undici'. Is that something in the works so that all of undici's exports can be accessible? It seems odd that I would have to install undici separately to use it internally 🤔

Thanks 👍

[meyfa]

Relevant: #43187

[joematune]

@meyfa Thanks for the link. I guess we can hack together an agent but it's very awkward.

import assert from "node:assert";

// We have to execute fetch once to instantiate the global dispatcher?
fetch("https://example.com").catch(assert);

const globalDispatcher = global[Symbol.for("undici.globalDispatcher.1")];
const dispatcher = new globalDispatcher.constructor({ connectTimeout: 1 });

fetch("https://example.com", { dispatcher })
  .then(assert)
  .catch(error => assert(error.cause.code === "UND_ERR_CONNECT_TIMEOUT"));