casualoffice/wopi repository overview

⁠OpenCalc WOPI adapter

Makes OpenCalc installable into Nextcloud, ownCloud, SharePoint, Moodle and Alfresco. Those five do not each have an integration API — they have this one, and an administrator pastes a single discovery URL into a settings page.

Alpha.

⁠Run it

docker run -p 8090:8090 \
  -e OPENCALC_WOPI_PUBLIC_URL="https://calc.example.com" \
  casualoffice/wopi

Then point your host at /hosting/discovery.

⁠Why this is a separate image

It is not an arbitrary split. The collaboration server cannot mint tokens and holds no per-document state — that is what lets exactly one node own a document and the cluster grow by adding nodes. WOPI needs both a minting key and a per-file lock. Folding it in would trade that property away.

Collabora and ONLYOFFICE ship one image because their daemon genuinely is both. This project chose otherwise, deliberately, and the two images are that choice.

⁠Formats

.xlsx and .ods open and save back in kind, as do .csv, .tsv and .psv. What a format cannot carry is counted and named in a compatibility report rather than dropped quietly — the .ods writer keeps values, formulas and sheets, and says what it left behind.

⁠Source and licence

https://github.com/CasualOffice/opencalc⁠ — Apache-2.0.