Rest Api from Cubejs gets mistaken as GraphQL when using both in one handler

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 14 or higher

Node.js version

14.17.5

Reproduction repository

https://github.com/brantleyenglish/msw-test

Reproduction steps

Run yarn then yarn test

Current behavior

Currently I am getting this error, and the mocked rest endpoint does not get populated with mock data.

console.error
[MSW] Failed to intercept a GraphQL request to "GET https://azure-bonobo.aws-us-west-2.cubecloudapp.dev/cubejs-api/v1/load": cannot parse query. 
See the error message from the parser below.
Syntax Error: Expected Name, found String "measures".

This url should be parsed as a rest endpoint. This is not a graphql query.

Expected behavior

I expect the test to pass the resultSet to return some form of data.

[brantleyenglish]

Wow, this is very cool 😮 !! Thank you for taking a look into my issue and suggesting the improvement.

[kettanaito]

Hey, @brantleyenglish. Thanks for reporting this!

I’ve posted an update on the way to tell apart GraphQL requests reliably here: https://github.com/mswjs/msw/discussions/535#discussioncomment-2504052

This really moves the discussion (and the correct solution to this issue) to the GraphQL community. I’d stay in the loop to see how I can help. I’d love to merge a fix for this in a form of relying on the application/graphql+json content type header.