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feat: add decompress interceptor #3274

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Added a new interceptor to decompress the response body. I lifted some of the implementation from the way decompression is handled in the fetch client

This relates to...

Rationale

Changes

  • Adds a response interceptor to decompress gzip, brotli and deflate responses

Features

Bug Fixes

Breaking Changes and Deprecations

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@Uzlopak
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Uzlopak commented May 18, 2024

Should we also handle rawdeflate?

@adrianfalleiro
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Should we also handle rawdeflate?

Yep, I'm using the existing createInflate() util from the fetch client which handles both deflate and deflateRaw so it should handle both already. I'll add a test.

this.#inputStream,
...restDecoders,
this.#onDecompressStreamFinished.bind(this)
).on('data', (chunk) => this.#handler.onData(chunk))
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Missing backpressure

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@metcoder95 metcoder95 left a comment

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Documentation seems lost

lib/interceptor/decompress.js Show resolved Hide resolved
lib/interceptor/decompress.js Outdated Show resolved Hide resolved
}
}

function createDecompressionInterceptor () {
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We might need to support add the hinting of supported encoding in case implementers wants to limit this (I can only think for performance reasons).
They can pass a set of encodings supported, and the decompress decorator hints it using accept-encoding

outputStream.on('data', (chunk) => {
if (!this.#handler.onData(chunk)) {
this.#inputStream.pause()
this.#inputStream.once('drain', () => this.#inputStream.resume())
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Those is wrong. Drain is signaled through the resume function sent to onHeaders

// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding
if (requestEncodings.length !== 0 && method !== 'HEAD' && method !== 'CONNECT' && !nullBodyStatus.includes(statusCode)) {
const decoders = []
for (let i = 0; i < requestEncodings.length; ++i) {
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@tsctx tsctx Jun 18, 2024

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Suggested change
for (let i = 0; i < requestEncodings.length; ++i) {
for (let i = requestEncodings.length - 1; i >= 0; --i) {

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The other way round, right?

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Yeah, I made the same changes #3343.

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Thanks, I'll come back to this PR this week

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5 participants