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To: Frank Schuurmans <frank@bio.vu.nl>
Hi Frank,
I'm very impresssed with your "live" weblet. I would like to duplicate what
you have done at my end. I think I will need your help on this.
I downloaded Mini-Linux as a first attempt. Unix seems very complex
and mixed up, it will take me ages to even get started. Also running
"startx" crashed my computer. I am quite depressed at the thought of
having to learn another set of "jibberish". For the moment I am not going
further with Mini-Linux. I may install a full Linux on my spare drive, but
it is only 170MB - is that enough?
I have read that you can get Java and Netscape on Linux, so combined
with the "free" factor and the availability of source code, it may be a good
development platform for weblets, if only I can get over the pain of
learning yet another new system.
>This is a logfile (for debugging) of the weblet:
>file: operator= + value = 1
>Caller : /cgi-bin/fire.pl/webneuron/print.html?VALUE=2
>file: operator= PRINT value =
>file: action= fire value = 5
>/cgi-bin/fire.pl/webneuron/add1.html?VALUE=2
>file: operator= + value = 1
>Caller : /cgi-bin/fire.pl/webneuron/print.html?VALUE=3
>file: operator= PRINT value =
>file: action= fire value = 5
>/cgi-bin/fire.pl/webneuron/add1.html?VALUE=3
>file: operator= + value = 1
>Caller : /cgi-bin/fire.pl/webneuron/print.html?VALUE=4
>file: operator= PRINT value =
>file: action= fire value = 5
>/cgi-bin/fire.pl/webneuron/add1.html?VALUE=4
>file: operator= + value = 1
>Caller : /cgi-bin/fire.pl/webneuron/print.html?VALUE=5
>file: operator= PRINT value =
>file: action= value = 5
>
>I guess this looks a bit vague the weblet is run by calling
>
>http://gallinago.cybpub.nl:8080/fire.pl/webneuron/print.html?VALUE=1
>
>(This can't be done from the net, intranet only)
>
>At the moment al the firing is done by the browser:
>
>print.html :
> if VALUE <operator from table> <constant from table> output
Location: <data from table>
>
>in other words by redirecting: The problem with this is only 10
redirections are allowed
>by the cern httpd server. so this has to be implemented differently.
>Futher more only one webneuron is allowed to output and then the weblet
>finishes.
>
>The second problem I have is with the Default action RETURN
>I thought the caller URL would be stored in $ENV{'REFERER_URL'}
but it isn't
>so as a first start I've made this a hardlink to print.html (in the script)
>but eventually a webneuron has to send it's name (= URL).
>
>The last simplification I made is that only one variable can be
>send (which makes sense to me but I suspect you want to send more vars
>so a collum to the first parts of the table should
>be adden for variable names)
>
>The nice thing about this weblet is that no data is stored.
>(no file is changed)
>
>What do you think of it?
I'm very impressed. It looks like you've got something that actually works.
Unfortunately I don't understand what is going on to make it work. My
knowledge of CGI and http is poor, but I want to improve it. I would like
to duplicate your system and see exactly how it works for myself.
On a more general note...
It seems there are four possibilities for a weblet interpreter:-
Assembler level
Linux level - presumably programming in C or C++
CGI - from what you seem to be saying above, it seems there are quite a
few problems with this method.
Java level
Overall I prefer assembler because it is simple, relatively uncorrupted and
clean. You can easily build the structures required in RAM. I could get
something going on an Atari Falcon quite quickly (3 months or so) but I'm
not sure about integrating TCP-IP. I already have a set of macros to
simplify the assembler programming. However, I do not want to waste my
time if it is the wrong way to go.
By the way, we could just develop webneurons initially for a single
computer, and do the Web later.
Having developed it on the Atari - couldn't we then convert fairly easily to
other platforms?
After briefly seeing Linux in action - I would rather try Java instead of
that.
Whaen I reply to your mail I keep getting returned mail because it sends to
<frank@cypub.nl>.
Like your live weblet.
Be hearing from you,
]]>
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