cy.request - Content-type header can't be set for POST and PUT requests

Current behaviour:

I’m passing to the cy.request command the options object that contains the header Content-type:

cy.request({
  method: 'POST',
  url: `${Cypress.env('RAILS_APP_URL')}/admin/api/clients`,
  headers: {
    'Content-Type': 'application/json; charset=utf-8',
  },
  body: {}
})

For some reason, the header is not sent to the server. In the console, I can verify that the request doesn’t have Content-Type :

The same is true for PUT verb:

cy.request({
  method: 'PUT',
  url: `${Cypress.env('RAILS_APP_URL')}/admin/api/employees/54967`,
  body: {},
  headers: {
    'Content-Type': 'application/json; charset=utf-8',
  }
})

The only way I can force to set the content-type header is to add to each URL .json postfix eg. ${Cypress.env('RAILS_APP_URL')}/admin/api/clients.json

I can’t find any information in the docs that Content-Type is ignored and won’t be set for POST/PUT request. When I set it for GET a request it is set correctly.

Desired behaviour:

When I set Content-Type header in the cy.request command, it is sent with the request.

Versions

cypress 4.7.0 operating system: Linux Ubuntu 18 LTS browser: Chrome 83

[Olgagr]

@jennifer-shehane I only noticed one difference that I can reproduce. In case of your request, there is no referer header sent. In case of request to our API, the referer is always sent. It seems connected. When the request headers contains referer header, the Content-Type is not sent when set as an option.

As far as I can see our API sends Referrer-Policy header set to strict-origin-when-cross-origin

[gitsaquib]

Can we override referer? I dont want Referer like localhost:port/_cypress… I want to set this to say https://jira.myjira.com