autoreconnect with --preamble

[safonovi]

Hi, vi!
Thanks for the websocat.
For connection to the websocket, I use the following line:

websocat -t - autoreconnect:wss://ws_server/state/ --preamble '{"type": "auth", "data": "tocken"}'

The first connection is successful, but subsequent reconnections (after connection is lost) are rejected by the server, as if I didn't provide authentication data.

websocat -V
websocat 1.14.1

[vi]

Indeed, --preamble works at the top level. To prepend a preamble before each connection attempt, one would need something like websocat ... autoreconnect:preamble:..., but it is not supported in Websocat1 and is unlikely to be implemented in Websocat1 (but maybe in Websocat4).

You can workaround it using a pair of Websocats: one forwards connections from e.g. another local websocket to wss:// (with a preamble, without autoreconnect), the other connects stdio (-) to the local ws:// with autoreconnect (without the preamble). You may need to enable pings and ping timeouts to make it detect disconnections reliably.

websocat -tE ws-l:127.0.0.1:1234 --ping-interval 5 --ping-timeout 12 wss://ws_server/state/ --preamble '{"type": "auth", "data": "tocken"}'

websocat -tE - autoreconnect:ws://127.0.0.1:1234 --ping-interval 5 --ping-timeout 12