Re: WebDNA CAPTCHA
This WebDNA talk-list message is from 2008
It keeps the original formatting.
numero = 69757
interpreted = N
texte = I put together a captcha that uses WebDNA and Imagemagick. (1) Use WebDNA to generate a random string like so: [text ]Pattern =1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ[/text] [text]RandomString=[/text] [loop start=1&end=5&advance=1] [text]nextchar=[math]ceil([RANDOM format=float]*62)[/math]=[/text] [text]RandomString=[RandomString][GetChars start=[nextchar]&end=[nextchar]][Pattern][/GetChars][/text] [/loop] (2) Write the solution [RandomString] to a file. (3) use Imagemagick to put our [RandomString] onto a background image (background.gif) that we have already set up for this purpose like so: [shell]/usr/local/bin/convert -size 180x65 xc:white -tile captcha/ background.gif -draw "color 0,0 reset" -draw "font '/Library/Fonts/ Verdana' font-size 42 fill white stroke black stroke-width 2 translate 10,45 text 0,0 '[RandomString]'" 'captcha/text.png'[/shell] (4) Insert your image "captcha/text.png" into your form. (5) When the user submits their form compare their answer to the solution you saved in the text file in step 2. (6) Drink champagne :-) Phil Ronchetti ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
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I put together a captcha that uses WebDNA and Imagemagick. (1) Use WebDNA to generate a random string like so: [text ]Pattern =1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ[/text] [text]RandomString=[/text] [loop start=1&end=5&advance=1] [text]nextchar=[math]ceil([RANDOM format=float]*62)[/math]=[/text] [text]RandomString=[RandomString][GetChars start=[nextchar]&end=[nextchar]][Pattern][/GetChars][/text] [/loop] (2) Write the solution [RandomString] to a file. (3) use Imagemagick to put our [RandomString] onto a background image (background.gif) that we have already set up for this purpose like so: [shell]/usr/local/bin/convert -size 180x65 xc:white -tile captcha/ background.gif -draw "color 0,0 reset" -draw "font '/Library/Fonts/ Verdana' font-size 42 fill white stroke black stroke-width 2 translate 10,45 text 0,0 '[RandomString]'" 'captcha/text.png'[/shell] (4) Insert your image "captcha/text.png" into your form. (5) When the user submits their form compare their answer to the solution you saved in the text file in step 2. (6) Drink champagne :-) Phil Ronchetti ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
Phil Ronchetti
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