Re: [q-lang-users] cgi.q

[Albert G. <Dr....@t-...>]

Tim Haynes wrote:
> Eep, well spotted. OK, I'm attaching the latest version I have in use here.

Dear Tim,

thanks a lot indeed. I'm ready to commit the new version to cvs, but 
with Q 7.1 I get: Error cgi.q, line 91: invalid character escape `\?'. 
Here's the corresponding line:

                         (regex "" "^http://[^?]+\?(.*)$" HR (reg 1) )

You probably want a \\? there? (Yes, John, I admit that you were right 
all along: It's hard to spot such bugs without making unrecognized char 
escapes a syntax error. (-:)

>    * A `strictatoi' function (a wrapper around val that only works if the
> string is a number - saves a risk of Q-injection! - also uses `matches')

I don't know whether this is helpful, but you can also use `valq' to do 
a "safe parse" without evaluating anything:

safe_atoi S = I where 'I:Int = valq S;


BTW, do you still have a Q-powered page available anywhere? I remember 
that you once had a part of the interface to your picture collection 
written in Q, is that still the case?

In case someone is interested in this side of Q programming, I also have 
a little Q-powered website. The entry point is here:

http://muwiinfa.geschichte.uni-mainz.de:5050/kirnberger.html

It lets you throw the dice (you must have JavaScript enabled in your 
browser to make that work) and compose your own random "Kirnberger 
polonaise", which is then served as a MIDI file. Instructions and a link 
to the source code of the script are on the page.

Hmm, it just came to me that I should probably put some Q cgi scripting 
examples on q-lang.sf.net...

Cheers,
Albert

-- 
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email:  Dr....@t-..., ag...@mu...
WWW:    http://www.musikinformatik.uni-mainz.de/ag