EtherCalc

• Overview: https://ethercalc.net/
• 中文版: http://tw.ethercalc.net/
• 简体中文: http://cn.ethercalc.net/
• REST API: API.md

EtherCalc is a web spreadsheet for real-time collaborative editing. This branch is the TypeScript rewrite on the Cloudflare fullstack (Hono + Workers + Durable Objects + D1 + KV + R2). It deploys to Cloudflare via wrangler deploy, and self-hosts anywhere via docker compose up with no Cloudflare account required. See CLAUDE.md for the plan-of-record, full architecture, and phase status.

Integrated with content management systems:

• Socialtext
• Drupal

Browsers tested: Safari, Chrome, Firefox.

Install

Via npm (requires Bun ≥ 1.1 on PATH — the CLI spawns bunx wrangler):

npm install -g ethercalc
ethercalc              # starts on http://localhost:8000

Via Docker (no Bun needed on the host — the image carries it):

git clone https://github.com/audreyt/ethercalc
cd ethercalc
docker compose up -d

Both paths boot the same Miniflare-backed Worker, persist state under ./ethercalc-data/ (or /data in the container), and need no Cloudflare account.

Self-hosting

git clone https://github.com/audreyt/ethercalc
cd ethercalc
docker compose up -d

This boots the Miniflare-backed Worker on http://localhost:8000 and persists all spreadsheet state (Durable Objects, D1, KV, R2) to ./ethercalc-data/ in the repo. No Redis, no Node runtime, no Cloudflare account.

Environment variables

Override defaults by exporting these before docker compose up:

On Apple Silicon, Docker Desktop's virtio networking has an intermittent quirk that can make curl localhost:8000 hang even against a healthy container. If you hit it, run the worker directly (bun run --cwd packages/worker dev) or use a Linux host.

CLI

For non-Docker runs (local dev, systemd, etc.) use the bin/ethercalc wrapper. It accepts the legacy flag surface and forwards to wrangler dev + Miniflare env vars:

bin/ethercalc [--key SECRET] [--cors] [--port N] [--host ADDR] \
              [--expire SEC] [--basepath PREFIX] \
              [--persist-to DIR]

Run bin/ethercalc --help for the full flag table. --keyfile / --certfile are accepted for backward compatibility but currently print a warning — wrangler dev does not expose TLS. Terminate TLS at a reverse proxy (nginx/caddy/traefik).

Deploy to Cloudflare

cd packages/worker
npx wrangler deploy

Store the HMAC secret as a Worker secret:

npx wrangler secret put ETHERCALC_KEY

Migration from a legacy (Redis-backed) EtherCalc

bin/ethercalc migrate streams an existing Redis or Zedis instance into the new Worker via PUT /_migrate/seed/:room:

bin/ethercalc migrate \
  --source redis://localhost:6379 \
  --target http://new-worker.example/ \
  --token $ETHERCALC_MIGRATE_TOKEN

The migrator holds O(1-per-room) memory regardless of dump size — the Redis server owns RDB decoding. The target endpoint is gated by env.ETHERCALC_MIGRATE_TOKEN (when unset, the route returns 404). Pass --dry-run to preview without writing.

Development

bun install
bun run --cwd packages/worker dev          # wrangler dev --local
bun run --cwd packages/worker test         # workers-pool + node tests

See CLAUDE.md for the directory map, testing strategy (100% line/branch/function/statement coverage plus Stryker mutation gates on gated packages), and the remaining phase plan.

REST API

See API.md. The public HTTP surface is preserved byte-for-byte where deterministic, minus a small allow-list of sensible fixes documented in CLAUDE.md §6.1.

Licensing

Common Public Attribution License (Socialtext Inc.)

• socialcalcspreadsheetcontrol.js
• socialcalctableeditor.js

Artistic License 2.0 (Socialtext Inc.)

• formatnumber2.js
• formula1.js
• socialcalc-3.js
• socialcalcconstants.js
• socialcalcpopup.js

Artistic License 2.0 (Framasoft)

• l10n/fr.json

MIT License (John Resig, The Dojo Foundation)

• static/jquery.js

MIT License (HubSpot, Inc.)

• static/vex-theme-flat-attack.css
• static/vex.combined.min.js
• static/vex.css

MIT License (Stuart Knightley, David Duponchel, Franz Buchinger, Ant'onio Afonso)

• static/jszip.js

Apache License 2.0 (SheetJS)

• static/shim.js
• static/xlsx.core.min.js
• static/xlsxworker.js
• assets/start.html (xlsx2socialcalc.js)

CC0 Public Domain (唐鳳 / Audrey Tang)

• src/*.ls (legacy LiveScript sources, preserved until Phase 12 sweep)
• packages/**/*.ts (TypeScript rewrite)

Mozilla Public License Version 2.0 (LibreOffice contributors)

• images/sc_*.png