Thank you, Jacques, for your thoughtful response. I've been experimenting with php for a few hours now. It's exactly as Linas said, like reading and writing files, completely php native, no addons. I'll probably go like an ajaxing php script that opens a connection, sends a command, reads a response, and closes the connection. Things look promising for now, it is just that little something I'd like to avoid: mandatory sleeping php for 125 milliseconds (on my machine) to give a time for getting the response after sending a command. But I'm out of ideas on how to avoid it.
- ivan - uto, 21. pro 2021. u 15:23 Jacques Basaldúa <[email protected]> napisao je: > 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 >> Google Groups "opencog" group. >> >> > > >> 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 >> Google Groups "opencog" group. >> >> > > > 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/CAB5%3Dj6WYVbV14e4xZPWYJm-iEnzNdi21YXQK%2BbmWRa5f%2B29j4w%40mail.gmail.com >> . >> >> > > >> >> > > >> >> > > >> >> > > -- >> >> > > 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. >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> Groups "opencog" group. >> >> 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/CAHrUA35jXYy0AgLtum%3DvynpN%3DjvTH0r%2Bv5NPnBWncMVAxaKjtw%40mail.gmail.com >> . >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "opencog" group. >> > 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/CAB5%3Dj6XaSAiommr7aLKHs880h7G_yEY0Nx2QKTismCoZRzw9nw%40mail.gmail.com >> . >> >> >> >> -- >> 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 >> "opencog" group. >> 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/CAHrUA37G6CUQrdHQpwMS%3DkmM3StUZNCrUrmsVohr-sd51ZSsgA%40mail.gmail.com >> . >> > -- > You received this message because you are subscribed to the Google Groups > "opencog" group. > 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/CA%2B_pmb6BgsVcp%2B9HuYY%3Dmm-%2BwNjmf7aX7aBLK1ZJ1R%3DxwZpe-Q%40mail.gmail.com > <https://groups.google.com/d/msgid/opencog/CA%2B_pmb6BgsVcp%2B9HuYY%3Dmm-%2BwNjmf7aX7aBLK1ZJ1R%3DxwZpe-Q%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "opencog" group. 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