How to log HTTP response header value for all cypress requests? - testing

Question

One of my ideas would be to overwrite the request command, but I don't know how to handle the response object.
A snippet I already have:
Cypress.Commands.overwrite(
'request',
(
originalFn: Cypress.CommandOriginalFn<'request'>,
options: Partial<Cypress.RequestOptions>
): void | Cypress.Chainable<Cypress.Response<unknown>> => {
return originalFn(options);
}
);
My other idea would be to intercept all requests, but there are already interceptors added and you can not have two for one request.
beforeEach(() => {
cy.intercept(
{
url: '*/**',
},
req => {
// tried with 'after:response' too
req.on('response', res => {
cy.log(`${res.headers['x-custom-header']}`);
});
}
);
});
Is there any other way to log a custom header value for all request?

Answer 1

My final working solution was to add this code to /support/index.ts
beforeEach(() => {
cy.intercept({ url: '*', middleware: true }, req => {
req.on('after:response', (res => {
const customHeaderKey = 'x-custom-header';
const customHeaderValue = res.headers[customHeaderKey];
if (customHeaderValue) {
const message = JSON.stringify({ [customHeaderKey]: customHeaderValue });
Cypress.log({ message }).finish();
}
}));
});
});