Client not following redirects

[kylsgl]

Bug Description

Client not following redirects

Reproducible By

const undici = require("undici");

const dispatcherOpts = {
  maxRedirections: 1,
};

const requestOpts = {
  method: "GET",
  origin: "https://imgur.com",
  path: "/qRKTc1U.jpeg",
};

new undici.Agent(dispatcherOpts)
  .request(requestOpts)
  .then(({ statusCode, headers }) => {
    console.log("Agent:", statusCode, "\n", headers);
  })
  .catch(console.error);

new undici.Client(requestOpts.origin, dispatcherOpts)
  .request(requestOpts)
  .then(({ statusCode, headers }) => {
    console.log("Client:", statusCode, "\n", headers);
  })
  .catch(console.error);

Expected Behavior

It should follow the redirect

Logs & Screenshots

Agent: 200 
 {
  connection: 'keep-alive',
  'content-length': '451104',
  'content-type': 'image/jpeg',
  'last-modified': 'Mon, 22 May 2023 13:33:03 GMT',
  etag: '"bf7cfe5aa4341b0761cab33d795c539f"',      
  'x-amz-storage-class': 'STANDARD_IA',
  'x-amz-server-side-encryption': 'AES256',
  'x-amz-cf-pop': 'IAD12-P2',
  'x-amz-cf-id': '0PT3Lf5C_pPRg_IyvPvm_mYlrK_DDZH7QayqRmKuzJndkgH_nhrXVg==',
  'cache-control': 'public, max-age=31536000',
  'accept-ranges': 'bytes',
  age: '54681',
  date: 'Wed, 01 May 2024 11:30:03 GMT',
  'x-served-by': 'cache-iad-kcgs7200020-IAD, cache-bur-kbur8200095-BUR',
  'x-cache': 'Miss from cloudfront, HIT, HIT',
  'x-cache-hits': '2, 0',
  'x-timer': 'S1714563003.252339,VS0,VE1',
  'strict-transport-security': 'max-age=300',
  'access-control-allow-methods': 'GET, OPTIONS',
  'access-control-allow-origin': '*',
  server: 'cat factory 1.0',
  'x-content-type-options': 'nosniff'
}

Client: 301 
 {
  connection: 'close',
  'content-length': '0',
  'retry-after': '0',
  location: 'https://i.imgur.com/qRKTc1U.jpeg',
  'accept-ranges': 'bytes',
  date: 'Wed, 01 May 2024 11:30:04 GMT',
  'x-served-by': 'cache-fra-eddf8230146-FRA',
  'x-cache': 'HIT',
  'x-cache-hits': '0',
  'x-timer': 'S1714563005.568657,VS0,VE0',
  server: 'cat factory 1.0',
  'strict-transport-security': 'max-age=300',
  'cache-control': 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0',
  'x-frame-options': 'DENY',
  'access-control-allow-origin': 'https://imgur.com',
  'access-control-allow-credentials': 'false'
}

Environment

undici@6.15.0
Node.js v22.0.0

[mcollina]

It can't. The Client can only talk to 1 origin, so it can't follow redirects.

You can add single host redirects with https://github.com/nodejs/undici/blob/main/docs/docs/api/Dispatcher.md#example-1---basic-compose