task/CDD 1379 page previews#3077
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I've made lots of comments but this is looking really good! Worked nicely on my local machine 🙂
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Enable page previews to the configured frontend URL
- with set embargo date
- support for per-request disabling of caching
via Cache-Control headers from the client
PR Review #3 - Apply auth to View Live - move shared.py to appropriate locations - django UTC timezone consistency in virtual_clock.py - remove redundant embargo context helper - tidy up typing import as it is used only once (from typing as t) - default to None if page previews not enabled - fix keyword args issue in virtual_clock.py - remove positional arg task/CDD-1379-page-previews update idna to 3.15
After discussion with @jrdh we decided 5 we needed this until performance improves
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Description
CDD-1379 - Page Previews
Depends Upon: Front End branch: task/CDD-1379-page-previews (please pull the latest)
Date: 2026-02-27
Ticket: https://ukhsa.atlassian.net/browse/CDD-1379?search_id=055fe61d-bee9-48d9-80bc-ffb0f1c26b76&referrer=quick-find
Authors: Jean-Pierre Fouche
Impact: Affects all pages - broad testing required
Testing: Comprehensive unit tests supplied. UAT needed.
Summary
Allow editors of headless composite pages to click a Preview button that immediately redirects them to the external frontend application, rather than opening the built-in Wagtail iframe preview. Preview URLs include a short-lived signed token so the frontend can safely fetch draft content from the CMS.
Additionally, allow users to select an embargo date in order to preview otherwise embargoed data.
Continued in ./changelog/2026-02-27/CDD-1379.page-previews.md
Fixes #CDD-1379
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