[Epic] New WOPI Server

[dragotin]

Implement a WOPI Server following the WOPI protocol specification as described here: https://learn.microsoft.com/en-us/microsoft-365/cloud-storage-partner-program/rest/

This new WOPI Server should be written in Golang and can be based on Willy Klouceks work in https://github.com/wkloucek/cs3-wopi-server/

The new server does not have to maintain oC10 compatibility.

The most important collaborative editor applications for the WOPI are

• OnlyOffice
• Collabora office
• Microsoft Office 365

other applications should be integrated later, such as

• CodiMD
• ...

Locking is mandatory utilizing the oCIS locking API.

Extra features

The following extra features would add considerable benefit:

• Stateless: No permanent storage needed (if possible)
• Simple to extend if needed to connect other collaborative editors
• Good runtime debugging capabilities through comprehensive loggings
• Audit functionality (ie. which documents were opened/closed when) based on events via NATS (already existing)

Definition of done

• [ ] Functional requirements

Quality Assurance

• [ ] CI based test suite that runs different testing scenarios
• [ ] Successful WOPI validation tool
• [ ] Manual tests with oCIS and the main editors

Deployment

The new WOPI Server does have the following deployment requirements:

• [ ] Deployable in the single binary. Included in the default build.
• [ ] Simple to deploy on a "developer machine" to work on it
• [ ] Good docker/kubernetes "support", health endpoint, using the micro service registry, should survive restarts,
• [ ] metrics
  • TBD

Documentation

The following documentation related work has to be delivered:

• Documentation for the Dev-Docs about
  • [ ] Development setup
  • [ ] Docker deployment
  • [ ] Kubernetes considerations
• Input for the administrator documentation written by docs team

References

• https://github.com/owncloud/enterprise/issues/3639
• https://jira.owncloud.com/browse/OCIS-406
• https://github.com/pydio/cells/tree/main/gateway/wopi