httpd-conf intercept requests and answer with a function?

[gekkonier]

Hi,

I'd like to tinker a bit with the inbuilt webserver.

I managed to fire one up that serves form a directory, and logs ervery request into a file.

For this i used (command-event (fn (s)) in a httpd-conf.lsp file.

This I use with

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newlisp httpd-conf.lsp -http -d 80 -w ./www

In this command-event i can append-file the requests into a txt file to look what a "user" is looking for.

That all works good.



Now I would like to implement something more.



Lets say: if my request looks like this:

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GET /hubert HTTP/1.1

I know i can parse the request for lets say "hubert".



But how can I "route" to a custom definition which ansers to hubert?

Lets say i have this here:

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(define (my-hubert)
   (print "hello world"))


How can I "answer" with (my-hubert) if someone does a GET /hubert. Instead of a file sitting in www?



Thank you so much for your input in advance,

Gregor

[gekkonier]

After further investigation it seems it's the easiest way to do it with cgi on apache. and dont use the inbuilt webserver.

[rickyboy]

Dragonfly web framework is written in newlisp



http://www.taoeffect.com/dragonfly-newlisp/example-site/">http://www.taoeffect.com/dragonfly-newl ... mple-site/">http://www.taoeffect.com/dragonfly-newlisp/example-site/



and has the functionality you seek (concerning routes):



http://www.taoeffect.com/dragonfly-newlisp/example-site/dragonfly_routes">http://www.taoeffect.com/dragonfly-newl ... fly_routes">http://www.taoeffect.com/dragonfly-newlisp/example-site/dragonfly_routes



Check out / steal some code!  :) Happy hacking!

[gekkonier]

Thank you rickyboy,



I need something much more simpler.

I'd like to program inhouse tools for 2-3 people in company, and for my family at home.

I like lisp like syntax much more (than my previous vehicle ruby) so I tried Common Lisp, Clojure, Racket for this tasks, but:

Common Lisp is overkill and I don't like 20mb images just for serving simple stuff. Racket ditto, the whole stack is bloated (at least it really works!), and Clojure is on Raspberries a pain.

Now newLISP - i LIKE it very much, so far.



I took a look at both newlisp on rockets and dragonfly - that seem to me the more sophisticated options for webdev with newLISP, but both are to much for me.



Nothing fancy ;)

[rrq]

For small scale http services I typically use https://acme.com/software/thttpd">thttpd as frontend, with newlisp for the "cgi" scripting. Quick and easy :)

[varbanov]

Hi Gregor,

For similar purpose I start a server with something like:

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newlisp.exe -c -d 4780 -w ..MyProjectsToWeb
(on Windows OS)



In  ..MyProjectsToWeb I've put index.cgi which might look like (minimalistic):

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#!/usr/bin/newlisp

(print "Content-type: text/htmlrnrn")
(module "cgi.lsp")

(define (my-hubert) (println "<h3>Hello World!</h3>"))

(apply (read-expr  (CGI:params 0 0)))

(exit)


Then I open in a browser http://localhost:4780/?my-hubert">http://localhost:4780/?my-hubert



:) Not the absolute elegance, but it works...



PS notes:

- I don't remember why I left -c parameter when starting the server. May be it's not important and -http will be fine too

- The first line of index.cgi is important for Linux. I use the same code on both Windows and Linux machines at home.

- In index.cgi you can use (load "path-to-some-newlisp-file") to load more functions and/or data, of course.

- I'm using this for a very simplistic implementation of Wiki combined with Markdown-like coding ... it's great fun to see it working with so small code :)



Good Luck and please, share how Your experiments go.



PPS. I'm sorry, I didn't pay enough attention to httpd-conf.lsp. It's obvious, that the command-event function could transform a nicer "outside" url like http://localhost:4780/my-hubert">http://localhost:4780/my-hubert to the "inner" for my approach url, i.e. http://localhost:4780/?my-hubert">http://localhost:4780/?my-hubert

[gekkonier]

Hi varbanov,

thank you very much for your example. I try to setup your example and tinker with it.

Sorry for that late response, i got so much work to do.



Gregor