Re: curl with websockets

From: Pierre Brico via curl-users <curl-users_at_lists.haxx.se>
Date: Fri, 17 Jun 2022 15:10:50 +0200

Hi,

Just my 2 cents: is it possible to design it as it will be interactive?
Here is what I imagine:

INPUT=$(mktemp -u)mkfifo -m 600 "$INPUT"
OUTPUT=$(mktemp -u)mkfifo -m 600 "$OUTPUT"

(cat "$INPUT" | curl wss://example.com/ -o "$OUTPUT") &

NCPID=$!
exec 4>"$INPUT"exec 5<"$OUTPUT"
echo "$COMMAND1" >&4read -u 5 -r RESPONSE1;echo "Response: '$RESPONSE1'"

echo "$COMMAND2" >&4read -u 5 -r RESPONSE2;echo "Response: '$RESPONSE2'"


Pierre






On Fri, Jun 17, 2022 at 2:26 PM Stefan Eissing via curl-users <
curl-users_at_lists.haxx.se> wrote:

>
>
> > Am 17.06.2022 um 13:23 schrieb Daniel Stenberg <daniel_at_haxx.se>:
> >
> > On Fri, 17 Jun 2022, Stefan Eissing wrote:
> >
> >> echo "hello little ws" | curl wss://example.com/
> >
> > Yes, but I was also thinking sending a default message and then go into
> the interactive mode. Like this:
> >
> > $ curl -d "hello little ws" wss://example.com/
> > yes
> > you
> > silly
> > ^d
> >
> > With some initial feedback via Twitter my list of ideas now looks like
> this:
> >
> > - Read stdin and send off as messages. Consider newline as end of
> fragment.
> > (default to text? offer option to set binary)
>
> There are --data-* options for that, I guess?
>
> > - Respond to PINGs automatically
> > - Issue PINGs at some default interval (option to switch off/change
> > interval?)
>
> Something like --keepalive-time on the ws layer. Unimaginative
> --ws-keepalive-time
>
> > - Allow `-d` to specify (initial) data to send (should the format allow
> for
> > multiple separate frames?)
> > - Exit after N messages received, where N can be zero.
>
> Or a duration.
> --ws-receive-timeout N: expect non-ping response data at least every N
> fractional seconds
> --ws-receive-duration N: close the websocket after N fractional seconds,
> not matter if data has been received or not
>
> >
> > --
> >
> > / daniel.haxx.se
> > | Commercial curl support up to 24x7 is available!
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> > | https://curl.se/support.html
>
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Received on 2022-06-17