fix: support truncated gzip

lib/fetch/index.js

@@ -2007,7 +2007,14 @@ async function httpNetworkFetch (
  for (const coding of codings) {
  // https://www.rfc-editor.org/rfc/rfc9112.html#section-7.2
  if (coding === 'x-gzip' || coding === 'gzip') {
- decoders.push(zlib.createGunzip())
+ decoders.push(zlib.createGunzip({
+ // Be less strict when decoding compressed responses, since sometimes
+ // servers send slightly invalid responses that are still accepted
+ // by common browsers.
+ // Always using Z_SYNC_FLUSH is what cURL does.
+ flush: zlib.constants.Z_SYNC_FLUSH,
+ finishFlush: zlib.constants.Z_SYNC_FLUSH
+ }))
  } else if (coding === 'deflate') {
  decoders.push(zlib.createInflate())
  } else if (coding === 'br') {

test/node-fetch/main.js

@@ -640,15 +640,13 @@ describe('node-fetch', () => {
  })
  })
 
- xit('should decompress slightly invalid gzip response', () => {
+ it('should decompress slightly invalid gzip response', async () => {
  const url = `${base}gzip-truncated`
- return fetch(url).then(res => {
- expect(res.headers.get('content-type')).to.equal('text/plain')
- return res.text().then(result => {
- expect(result).to.be.a('string')
- expect(result).to.equal('hello world')
- })
- })
+ const res = await fetch(url)
+ expect(res.headers.get('content-type')).to.equal('text/plain')
+ const result = await res.text()
+ expect(result).to.be.a('string')
+ expect(result).to.equal('hello world')
  })
 
  it('should decompress deflate response', () => {