Rails 7.1 Content-Type Issue: "An empty string is not a valid JSON string."

[jtannas]

Heyo - thanks for the helpful gem 🙇

We just ran into the following set of errors when upgrading from Rails 7.0 to Rails 7.1

Screenshots

Turns out JSON.parse(req.body.read) was returning an empty string because the content-type header wasn't set in the cypress request.
We managed to fix it on the client side by adding the content type header to the appCommands

The other way that we could get it to work was replacing JSON.parse(req.body.read) with JSON.parse(req.body) in the middleware, but decided against it because it required overriding the gem code.

https://github.com/shakacode/cypress-on-rails/blob/c36e2862a89ab117560701660f90365c08e9bfd2/lib/cypress_on_rails/middleware.rb#L54

Might be worth updating the on-rails.js template to include the content type header.

[nijikon]

This fixes it for me as well. Thanks @jtannas 💜

[Alagaesia93]

Fixed for me too! I opened a PR to add this to readme => #145