Firebase Function body parsing is breaking our body parsing and prevent any request with body to returns

[255kb]

Describe the bug

When using @mockoon/serverless with Firebase Functions, the body is already parsed which doesn't trigger the 'data' event. Our body parser is hanging, waiting for a 'data' event that is never coming, and thus the whole function is hanging up.
This happens every time there is a body with a parseable Content-Type (no matter the method).

Steps to Reproduce

Use the minimal setup (see serverless repo) and send a body to a POST route for example.

mock.json

Call POST /test with a Content-Type: application/json header and a body.

Solution

Either add a disableBodyParsing option to the server (and a corresponding CLI flag/serverless param), or update the body parser to automatically detect that the body was already parsed (maybe a better option).

Sources:
https://stackoverflow.com/questions/63968953/why-do-i-get-a-502-gateway-error-from-nextjs-app-hosted-on-firebase-for-post-r/63975702#63975702
https://stackoverflow.com/questions/58237305/post-request-hangs-timeout-when-trying-to-parse-request-body-running-koa-on-f
https://dev.to/3imed_jaberi/koa-bodyparser-with-firebase-cloud-functions-4ogk

Mockoon version:

all

OS / OS version:

all