The "/chat-send" page:

This page receives (via XHR) a new chat-message and/or a new file to be entered into the chat history.

On success it responds with an empty response: the new message should be fetched via /chat-poll. On error, e.g. login expiry, it emits a JSON response in the same form as described for /chat-poll errors, but as a standalone object instead of a list of objects.

Requests to this page should be POST, not GET. POST parameters include:

msg

The (Markdown) text of the message to be sent

file

The content of the file attachment

lmtime

ISO-8601 formatted date-time string showing the local time of the sender.

At least one of the "msg" or "file" POST parameters must be provided.