Safari: Collaborative session does not work

[shenyih0ng]

Description

When a safari client tries to join a collaborative session, the following browser error is reported:

Failed to load resource: cannot parse response

The expected response contains a "Document Exists" body along with some headers (Connection, Upgrade) for subsequent wss connection.

Possible reason

• Request uses http2 protocol
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Connection

  Warning: Connection-specific header fields such as Connection and Keep-Alive are prohibited in HTTP/2 and HTTP/3. Chrome and Firefox ignore them in HTTP/2 responses, but Safari conforms to the HTTP/2 spec requirements and does not load any response that contains them.