xblock-bunny

Open edX XBlock that embeds Bunny.net Stream videos with Token Authentication, direct-to-Bunny TUS upload from Studio, and encoding-status webhooks.

Status: 0.1.0 — early. Issues / PRs welcome at https://github.com/amirtds/bunny-xblock.

Compatibility

Authoring is browser-based: any browser that supports fetch + Promise + URLSearchParams (effectively Chrome / Firefox / Safari / Edge from the last 5 years). The LMS player uses a vanilla <iframe> so it inherits Bunny's playback compatibility — including iOS Safari, where the embedded player falls back to AirPlay-friendly HLS.

Why

The default Open edX VideoBlock doesn't know how to play iframe.mediadelivery.net URLs and the dominant community alternative (appsembler/xblock-video) ships only Brightcove / HTML5 / Vimeo / Wistia / YouTube backends — no Bunny. This XBlock fills the gap: it lets course authors upload directly to a configured Bunny library from inside a Studio unit and renders Token-Authenticated signed iframes in the LMS so videos can't be hot-linked.

Install

The XBlock self-wires via Open edX's Django plugin entry points — no edx-platform edits, no INSTALLED_APPS patching, no lms.env.json / cms.env.json changes.

On Tutor (Sumac / Teak)

tutor config save --append OPENEDX_EXTRA_PIP_REQUIREMENTS=xblock-bunny
tutor local launch

That's it. Open the LMS as a global admin, paste credentials at:

https://<your-lms>/admin/xblock_bunny/bunnyconfiguration/

Then in Studio: course → Advanced Settings → "Advanced Module List" → add bunny_video. The "Bunny Video" component now appears in the unit "Add New Component" menu.

Configuration fields

After saving, the page displays a Webhook URL. Paste it into Bunny → Stream → Library → Webhooks so the XBlock receives encoding-status updates.

Authoring (inline UX)

In a Studio unit, "Bunny Video" gives you a single drop zone:

• Drag a file or click "Choose video".
• Watch the upload progress bar (TUS direct to Bunny — bytes never touch your Open edX server).
• The block shows "Processing on Bunny…" while encoding.
• The block flips to the signed-iframe player when Bunny reports ready. The webhook drives this — no page reload required.

You can replace or delete the video from the same surface.

Student playback

The LMS renders a click-to-load poster (using Bunny's auto thumbnail). On click, the iframe is mounted with a freshly signed URL:

https://iframe.mediadelivery.net/embed/<library>/<guid>?token=<sha256(securityKey+guid+expires)>&expires=<unix+6h>

Hot-linking the URL from another origin returns 401 (when Token Authentication is enabled on the Bunny library).

Known limitations

• Mobile apps: the official Open edX iOS / Android apps don't render custom video XBlocks natively — they degrade to a webview. v2 candidate.
• CSP: if your Open edX instance enforces Content-Security-Policy: frame-src, the package's settings hook adds iframe.mediadelivery.net to CSP_FRAME_SRC when that setting exists. On stricter setups, add it manually.
• Cubite-style analytics: courseware.video.played events are hardcoded to VideoBlock and don't fire for this XBlock. v2 candidate.

Architecture

• One Bunny library per Open edX instance — credentials live in a singleton BunnyConfiguration row managed via Django admin. API key and Security key are Fernet-encrypted (key derived from SECRET_KEY via HKDF).
• Upload uses TUS direct to https://video.bunnycdn.com/tusupload; the server only mints a per-upload signature (sha256(libraryId + apiKey + expires + guid), 1 h TTL).
• Embed URLs are signed at render time per the Bunny scheme (sha256(securityKey + guid + expires), 6 h TTL).
• Webhook auth is URL-token-only (Bunny Stream doesn't sign payloads), with library-mismatch and lifecycle-regression guards to mitigate URL leaks.
• Django app auto-discovered via lms.djangoapp / cms.djangoapp entry points (Open edX edx_django_utils.plugins).

License

Apache-2.0. See LICENSE.

This XBlock is maintained by Cubite and works with any Bunny.net account — no Cubite tenancy required.