Pages cached by the browser in non-proxied windows remain cached when loaded in the AUT

[cacieprins]

Current behavior

When an HTML document is loaded in a secondary browser window with, e.g., a link with target="blank", that page does not receive the cross-origin support injection from the proxy. Depending on the caching strategy in place, when loading this URL in the AUT, the browser will serve the cached version of the document. If cross origin support is necessary for the driver to communicate with the AUT, the test will hang while waiting for the cross origin postMessage handshake.

Desired behavior

These documents should cause a cache miss, instead of a cache hit.

• The proxy should recalculate etag headers when it injects code into AUT-rendered documents, and keep track of etag recalculations on given URLs for ensuring appropriate 304 responses on future requests. This will resolve the issue when etag cache control is in place.
• A manual workaround to manually clear browser cache for other cache control strategies

Test code to reproduce

This spec reliably reproduces this bug in Electron open mode:
https://github.com/cypress-io/cypress/blob/develop/packages/driver/cypress/e2e/issues/1244.cy.js

Cypress Version

13.6.2

Node Version

18.15.0

Operating System

MacOS Sonoma 14.1.1

[cypress-app-bot]

This issue has not had any activity in 180 days. Cypress evolves quickly and the reported behavior should be tested on the latest version of Cypress to verify the behavior is still occurring. It will be closed in 14 days if no updates are provided.

[cypress-app-bot]

This issue has been closed due to inactivity.