Request by got + compression hangs forever

[tim-coulter]

Prerequisites

• I confirm my issue is not in the opened issues
• I confirm the Frequently Asked Questions didn't contain the answer to my issue

Environment check

• I'm using the latest msw version
• I'm using Node.js version 18 or higher

Node.js version

v22.3.0

Reproduction repository

https://github.com/tim-coulter/msw-got-compression-example

Reproduction steps

npm i
npm run server
npm run test

Note that this is only reproducible with the following:

• app.use(compression); on the mock server
• a response which is large enough to require compression
• the request is sent using got

Current behavior

When the msw server has not started listening both the got and fetch requests work as expected and return a response. When the mock server is started, however, only the fetch request returns a response but the request using got appears to hang (got works 2 is never seen).

Expected behavior

As that request is not being intercepted by msw the behaviour should be exactly the same as before starting the server as after (the request made using got should not hang).

[kettanaito]

Hi, @tim-coulter. Thanks for reporting this.

We are working on improving the handling of encoded response bodies in Node.js, and hope to merge the fix in the nearest future. One of such improvements is making Undici expose their encoding utilities (see nodejs/undici#3423) and then forwarding that usage to Interceptors (see mswjs/interceptors#604). Once these two are merged, MSW should handle compressed response bodies correctly in Node.js.