Re: Random String Generator

[Ralph Daugherty <rdjfc@xxxxxxxxxxxxx>]

Thorbjørn Ravn Andersen wrote:
> Ralph Daugherty skrev:
> > Hi Thorbjørn, I am already doing what you are suggesting. The class I 
> > started with is (as I posted back aways) 
> > org.apache.myfaces.custom.captcha.util and I am bringing in supporting 
> > classes for generating a PNG text image twisted based on this. It is 
> > Apache's robust CAPTCHA logic, unmodified.
> >
> > I am not concerned about the size of unused code in a jar, if I were I 
> > would be the only one in IT anymore that was, and I know that 
> > ClassNotFound won't happen unless class is invoked.
> >
> > Keeping from invoking unrelated classes is the trick though. I'm not 
> > interested in that approach, but thanks for the suggestion.
> >
> > There will be one override or modification in the starting class from 
> > using HTTPResponseStream to another bytestream output. Other than that, 
> > code is generated and twisted based on properties, and there are/will be 
> > calls to change the defaults or generate based on passed in parms.
> >
> > The key class is CAPTCHAImageGenerator in that package.
> >
> >   
> I agree.  I had a quick look inside Tomahawk, and it looks like the 
> major meat you have to rip out is:
>
>
>     // construct the CAPTCHA image generator object.
>     CAPTCHAImageGenerator captchaImageGenerator = new 
> CAPTCHAImageGenerator();
>    
>     try
>     {
>         String captchaText;
>         Color endingColor = ColorGenerator.generateRandomColor(null);
>         Color startingColor = 
> ColorGenerator.generateRandomColor(endingColor);
>        
>         // Generate random CAPTCHA text.
>         captchaText = CAPTCHATextGenerator.generateRandomText();       
>        
>         // Generate the image, the BG color is randomized from starting 
> to ending colors.
>             captchaImageGenerator.generateImage(response, captchaText,
>             startingColor, endingColor);
>
>
> and the CAPTCHAImageGenerator looks to be dependent only on Java2D.
>
> I'll have a closer look after the weekend.
>
>
> /Thorbjørn

   It also is dependent on apache batik PNGEncoder, and therein the 
batik infrastructure.

   Thanks for your insight. I'll see this weekend whether I finish 
getting all the code together. But this code here is the start of the 
interface.

 rd