Hi Ivan,
Maybe, if you use zeroMQ (there is a PHP version,
https://www.php.net/manual/en/book.zmq.php) you can use the sockets just
like Linas is saying.
In Python, the actual code would be:
```
import zmq
context = zmq.Context()
socket = context.socket(zmq.REQ)
socket.connect ("tcp://localhost:17001")
socket.send ("(+ 2 2)")
message = socket.recv()
```
That requires the server to listen to the tcp socket connection which is
the transport layer of your telnet connection. Telnet itself would be the
application layer and, as Linas says, is probably not necessary.
My 2 cents.
Jacques.
On Tue, Dec 21, 2021 at 8:23 AM Linas Vepstas <[email protected]>
wrote:
> Hi Ivan,
>
> Some quick remarks about networking.
>
> -- Using telnet to access the cogserver is wild technology overkill.
> Telnet was designed to provide a teletype terminal over the network,
> including lots of complex teletype escape sequences. The cogserver
> needs exactly zero of that.
>
> -- the cogserver network interface is extremely low-level. So
> low-level, you can't get any lower. It's rock-stupid simple and basic.
> You open a socket. A very basic, simple, plain ordinary socket. Then
> you read and write characters to it. That's all. That's it. It's not
> any harder than opening a file, and reading/writing to that. Uses the
> same read/write API that files use. If you know sockets well (and it
> seems very few people do) it's about 5-10 lines of code. Or less.
> There's absolutely no need for complexity.
>
> I don't know php well enough, but the pseudocode really should be
> ```
> sock = open (locahost, 17001)
> write (sock, "(+ 2 2)")
> read(sock, buffer)
> close(sock)
> ```
> Really little or nothing more than that..
>
> FWIW, that's my coding philosophy: remove as much complexity as
> possible ("but no more"). Kind of everything is guided by that.
>
> Linas
>
>
> On Mon, Dec 20, 2021 at 6:05 PM Ivan V. <[email protected]> wrote:
> >
> > I was thinking more in a direction of including some MIT licensed php
> telnet library. If I'm on the right path about this, then there is no need
> for installing netcat, "only" php and Apache web server. But from your
> examples, netcat command prompt seems pretty simple to use. I'm still not
> sure about php running native programs, especially receiving an output from
> them, including running the whole app directly from the web.
> >
> > - ivan -
> >
> > pon, 20. pro 2021. u 23:22 Linas Vepstas <[email protected]>
> napisao je:
> >>
> >> And one more, I hit send too soon.
> >>
> >> echo -e "scm quiet\n(+ 2 2)\n" |nc -N localhost 17001
> >>
> >> The "quiet" mode suppresses the printing of the guile prompts.
> >> Unfortunately, the first prompt is always sent :-(
> >>
> >> -- linas
> >>
> >> On Mon, Dec 20, 2021 at 4:15 PM Linas Vepstas <[email protected]>
> wrote:
> >> >
> >> > Shoot. I wrote the wrong thing.
> >> > Try this:
> >> >
> >> > echo "(+ 2 2)" |nc -N localhost 17001
> >> >
> >> > The -N flag closes the socket after getting the reply, otherwise it
> >> > hangs waiting for more input.
> >> > So you'd replace the echo by php print and pipe to command.
> >> >
> >> > -- Linas
> >> >
> >> > On Mon, Dec 20, 2021 at 4:10 PM Linas Vepstas <[email protected]>
> wrote:
> >> > >
> >> > > On Mon, Dec 20, 2021 at 3:39 PM Ivan V. <[email protected]>
> wrote:
> >> > > >
> >> > > > Ok, this was fun...
> >> > > >
> >> > > > I restarted the computer in the meanwhile, deleted the whole
> OpenCog, and recloned and rebuilt everything without any problems. This
> time I put all the additional assets I needed like cogserver under
> `opencog` directory, if that means anything.
> >> > >
> >> > > You should be able to `git clone` to anywhere at all. And after
> >> > > building, saying `sudo make install` puts everything under the
> >> > > `/usr/local` directory.
> >> > >
> >> > > My guess is that you had old and incompatible clones: you would
> have
> >> > > to say `git pull` in all repos, to get a self-consistent version.
> >> > >
> >> > > > Cogserver is now up and running on port 17001, successfully
> communicating to rlwrap telnet. The initial test went fine.
> >> > > >
> >> > > > Next, the plan is to telnet it from php, and pipe it to html
> visualizer, if that's ok.
> >> > >
> >> > > probably the simplest way to do this is by wrapping php around
> netcat.
> >> > > Warning, there are two incompatible versions of netcat you can
> >> > > install. They are *almost* compatible, but not quite; one needs an
> >> > > extra flag that the other doesn't, else it hangs up too soon.
> >> > >
> >> > > I have the bsd version installed the package is `netcat-openbsd`
> >> > >
> >> > > Use it like so: `nc localhost 17001 (+ 2 2)` or `nc localhost 17001
> >> > > (cog-prt-atomspace)` and so on.
> >> > >
> >> > > > Wish me luck :)
> >> > >
> >> > > Good luck! and Merry Christmas, too!
> >> > >
> >> > > -- linas
> >> > >
> >> > > >
> >> > > > - ivan -
> >> > > >
> >> > > > pon, 20. pro 2021. u 20:00 Linas Vepstas <[email protected]>
> napisao je:
> >> > > >>
> >> > > >> On Sun, Dec 19, 2021 at 2:11 PM Ivan V. <[email protected]>
> wrote:
> >> > > >> >
> >> > > >> > Hi Linas and others,
> >> > > >> >
> >> > > >> > Sorry for the delay, I've been busy with my other projects.
> Now I tried to install OpenCog, made through several make steps until my
> machine started to hang. Tried several times, it always hangs on the same
> build step. I guess this is a penalty for having only 4GB on my machine,
> right?
> >> > > >>
> >> > > >> It builds just fine on my six-year-old 1GB laptop (which cost
> $200
> >> > > >> when new, so low end from the get-go.). I can even browse the
> web
> >> > > >> while it's building.
> >> > > >>
> >> > > >> Open a bug report. describe the problem.
> >> > > >>
> >> > > >> > And then I tried another option: I installed OpenCog from
> here: `https://github.com/opencog/docker`
> <https://github.com/opencog/docker>. I tried to follow `README.md`
> instructions, ran `./docker-build.sh -a` (the script successfully
> completed), but then I got stuck starting cogserver because the
> `cogserver/build/` folder is empty.
> >> > > >>
> >> > > >> The docker containers are possibly stale.
> >> > > >>
> >> > > >> --linas
> >> > > >>
> >> > > >> --
> >> > > >> You received this message because you are subscribed to the
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> >> > > >> To unsubscribe from this group and stop receiving emails from
> it, send an email to [email protected].
> >> > > >> To view this discussion on the web visit
> https://groups.google.com/d/msgid/opencog/CAHrUA34a2O624WCfk821t3wqUEYeg0WM%2B571AOKxGG2cCUB_xA%40mail.gmail.com
> .
> >> > > >
> >> > > > --
> >> > > > You received this message because you are subscribed to the
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> .
> >> > >
> >> > >
> >> > >
> >> > > --
> >> > > Patrick: Are they laughing at us?
> >> > > Sponge Bob: No, Patrick, they are laughing next to us.
> >> >
> >> >
> >> >
> >> > --
> >> > Patrick: Are they laughing at us?
> >> > Sponge Bob: No, Patrick, they are laughing next to us.
> >>
> >>
> >>
> >> --
> >> Patrick: Are they laughing at us?
> >> Sponge Bob: No, Patrick, they are laughing next to us.
> >>
> >> --
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> Groups "opencog" group.
> >> To unsubscribe from this group and stop receiving emails from it, send
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> .
> >
> > --
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> > To unsubscribe from this group and stop receiving emails from it, send
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> > To view this discussion on the web visit
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> .
>
>
>
> --
> Patrick: Are they laughing at us?
> Sponge Bob: No, Patrick, they are laughing next to us.
>
> --
> You received this message because you are subscribed to the Google Groups
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> To unsubscribe from this group and stop receiving emails from it, send an
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> To view this discussion on the web visit
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> .
>
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