Allow CORS for all subdomains under xmoj-script.uk

[Copilot]

Extends the CORS allowlist to permit requests from any subdomain of xmoj-script.uk, alongside the existing *.xmoj-script*.pages.dev, xmoj-bbs.me, and www.xmoj.tech rules.

Changes

• Source/index.ts: Added a new regex match in getAllowedOrigin for https://<subdomain>.xmoj-script.uk origins:

  if (/^https:\/\/[a-z0-9-]+\.xmoj-script\.uk$/.test(origin)) {
    return origin;
  }

  Pattern enforces HTTPS and requires at least one subdomain label; the apex domain itself is not permitted.

Summary by Sourcery

New Features:

• Allow CORS requests from any HTTPS subdomain of xmoj-script.uk, excluding the apex domain.

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Summary by cubic

Extends the CORS allowlist to accept HTTPS requests from any subdomain of xmoj-script.uk. Enforces subdomain-only (apex not allowed) and keeps existing rules for *.xmoj-script*.pages.dev, xmoj-bbs.me, and www.xmoj.tech.

^{Written for commit eddd19d. Summary will update on new commits.}

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Extends the CORS origin allowlist to include any HTTPS subdomain of xmoj-script.uk while preserving existing rules for .xmoj-script.pages.dev and other domains.

Sequence diagram for CORS validation with new xmoj-script.uk subdomains

sequenceDiagram
    actor Browser
    participant Frontend as Frontend_subdomain_xmoj_script_uk
    participant API as API_Server

    Browser->>Frontend: Fetch https://sub.xmoj-script.uk/app
    Frontend->>API: CORS preflight / API request with Origin: https://sub.xmoj-script.uk

    API->>API: getAllowedOrigin(origin)
    alt Origin matches xmoj_script_pages_dev
        API-->>API: return origin
    else Origin matches subdomain_xmoj_script_uk
        API-->>API: return origin
    else Origin matches xmoj_bbs_me_or_www_xmoj_tech
        API-->>API: return origin
    else No match
        API-->>API: return null
    end

    alt Allowed origin returned
        API-->>Frontend: Response with Access_Control_Allow_Origin: https://sub.xmoj-script.uk
        Frontend-->>Browser: Response forwarded
    else Origin not allowed
        API-->>Frontend: Response without CORS headers / 4xx
        Frontend-->>Browser: CORS blocked by browser
    end

Loading

File-Level Changes

Change	Details	Files
Extend CORS allowlist to cover all HTTPS subdomains of xmoj-script.uk.	Add a new regex branch in getAllowedOrigin that matches https://.xmoj-script.uk with lowercase alphanumeric and hyphen subdomains Ensure the new rule returns the origin directly on match, consistent with existing allowlist branches Keep the apex xmoj-script.uk domain disallowed by requiring at least one subdomain label in the pattern	Source/index.ts

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[sourcery-ai]

Hey - I've left some high level feedback:

• The new xmoj-script.uk regex only supports a single subdomain label (no additional dots), so if you truly need to allow 'any subdomain' (e.g., foo.bar.xmoj-script.uk) you may want to update the pattern to support multiple labels rather than just [a-z0-9-]+.
• Since getAllowedOrigin is accumulating multiple very similar regex checks, consider extracting a small helper or shared pattern builder for allowed hostnames to reduce duplication and make future domain additions less error-prone.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new `xmoj-script.uk` regex only supports a single subdomain label (no additional dots), so if you truly need to allow 'any subdomain' (e.g., `foo.bar.xmoj-script.uk`) you may want to update the pattern to support multiple labels rather than just `[a-z0-9-]+`.
- Since `getAllowedOrigin` is accumulating multiple very similar regex checks, consider extracting a small helper or shared pattern builder for allowed hostnames to reduce duplication and make future domain additions less error-prone.

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[Copilot]

Pull request overview

This PR broadens the worker’s CORS allowlist in Source/index.ts so browser requests can also come from xmoj-script.uk hosts, alongside the existing allowed XMOJ-related origins. It fits into the codebase by extending the origin validation used for preflight handling and response CORS headers.

Changes:

• Add a new getAllowedOrigin rule for https://<subdomain>.xmoj-script.uk.
• Keep the existing pages.dev, xmoj-bbs.me, and www.xmoj.tech origin rules unchanged.

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