Error: incorrect header check Z_DATA_ERROR

[jaschaio]

Bug Description

I am trying to fetch a URL but it fails. It works just fine when I use node-fetch, curl or the native browser fetch. It's similar to #1271 but there is no redirect happening.

These are the response headers:

{
  'cache-control': 'no-cache',
  'content-encoding': 'deflate',
  'content-type': 'text/xml; charset=utf-8',
  date: 'Mon, 08 Jan 2024 06:12:38 GMT',
  server: 'lighttpd/1.4.45',
  'transfer-encoding': 'chunked'
}

Reproducible By

const response = await fetch( 'https://egauge90013.egaug.es/cgi-bin/egauge-show?a&E' );

const text = await response.text();

console.log( text );

Expected Behavior

I would expect the response to log into console

Logs

Instead I get this error:

TypeError: terminated
    at Fetch.onAborted (node:internal/deps/undici/undici:11279:53)
    at Fetch.emit (node:events:513:28)
    at Fetch.emit (node:domain:489:12)
    at Fetch.terminate (node:internal/deps/undici/undici:10534:14)
    at Fetch.fetchParams.controller.resume (node:internal/deps/undici/undici:11258:36)
    at processTicksAndRejections (node:internal/process/task_queues:95:5) {
  [cause]: Error: incorrect header check
      at Zlib.zlibOnError [as onerror] (node:zlib:189:17) {
    errno: -3,
    code: 'Z_DATA_ERROR'
  }
}

Environment

Node v20.7.0 and v18.14.2

[mcollina]

Can you please set up a simple node server that reproduce the problem?

[jaschaio]

Can you please set up a simple node server that reproduce the problem?

https://codesandbox.io/p/devbox/fetch-lxhr8s

[mcollina]

I don't see a server there, only the fetch client.

[ronag]

Probably related https://github.com/node-fetch/node-fetch/blob/8b3320d2a7c07bce4afc6b2bf6c3bbddda85b01f/src/index.js#L315

[ronag]

PR welcome

[jaschaio]

I don't see a server there, only the fetch client.

Sorry, I misread your question. I don't control the server so not sure what exactly they are doing in their response that is causing issues with node fetch / unidici.

[jaschaio]

Probably related https://github.com/node-fetch/node-fetch/blob/8b3320d2a7c07bce4afc6b2bf6c3bbddda85b01f/src/index.js#L315

@ronag Thanks, do you mean node-fetch has some special handling not present in unidici and that's why it works with node-fetch but not node native fetch?

[ronag]

Probably related https://github.com/node-fetch/node-fetch/blob/8b3320d2a7c07bce4afc6b2bf6c3bbddda85b01f/src/index.js#L315

@ronag Thanks, do you mean node-fetch has some special handling not present in unidici and that's why it works with node-fetch but not node native fetch?

Correct.