Re: I wrote a captcha generator
Larry Lyons wrote: > > thanks Rick, shall give it a try. FYI, I moved the script to a different location: http://www.it.dev.duke.edu/blogcfm/captcha_script/index.cfm ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191360 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: I wrote a captcha generator
> Larry - that's just a default font file. You can change it to any > truetype font - it should work quite nicely on any platform. > > - Rick thanks Rick, shall give it a try. larry ~| Logware: a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191356 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: I wrote a captcha generator
Larry Lyons wrote:
>
> It works really well Rick. One question however, does it only work with
> windows boxes? Or how much modification would it require to work on a *nix
> box. For instance I saw this snippet in your code:
>
> if (not isDefined("arguments.fontFile")) {
> arguments.fontFile = "C:\WINDOWS\FONTS\comic.ttf";
> }
Larry - that's just a default font file. You can change it to any
truetype font - it should work quite nicely on any platform.
- Rick
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.7.1 - Release Date: 1/19/2005
~|
Logware: a new and convenient web-based time tracking application. Start
tracking and documenting hours spent on a project or with a client with Logware
today. Try it for free with a 15 day trial account.
http://www.houseoffusion.com/banners/view.cfm?bannerid=67
Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191315
Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4
Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4
Unsubscribe:
http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: I wrote a captcha generator
>While working on my blog application ( www.webworksllc.com/blogcfm ) I
>decided I needed some kind of captcha tool to help keep out the
>spambots. So with the help of a few java font rendering tutorials... I
>wrote one, and am releasing it under the BSD open-source license.
It works really well Rick. One question however, does it only work with windows
boxes? Or how much modification would it require to work on a *nix box. For
instance I saw this snippet in your code:
if (not isDefined("arguments.fontFile")) {
arguments.fontFile = "C:\WINDOWS\FONTS\comic.ttf";
}
thx,
larry
~|
Find out how CFTicket can increase your company's customer support
efficiency by 100%
http://www.houseoffusion.com/banners/view.cfm?bannerid=49
Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191266
Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4
Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4
Unsubscribe:
http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: I wrote a captcha generator
Paul, that's a great idea. I just implemented it =) - Rick Paul Vernon wrote: >>You can also put the image name in the form, which would allow >>you to delete it upon form submission. >> >>Alternatively, you could just delete the images it >>creates with a scheduled task. > > > You could use a cfm file to serve the image and use something like the > following in the form.. > > > > Then use CFContent in servecaptcha.cfm to serve the image specified and auto > delete it... Neat and tidy with no schedules or need to handle deletion in > the form submission either :) > > Paul > > > ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191259 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: I wrote a captcha generator
How about defining an X*Y grid for each character and randomly placing the character within these boundaries to add an extra element of randomness? Then maybe add a touch of rotation (no idea how to do that, sorry)? -- Damien McKenna - Web Developer - [EMAIL PROTECTED] The Limu Company - http://www.thelimucompany.com/ - 407-804-1014 #include ~| Logware: a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191246 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: I wrote a captcha generator
> You can also put the image name in the form, which would allow > you to delete it upon form submission. > > Alternatively, you could just delete the images it > creates with a scheduled task. You could use a cfm file to serve the image and use something like the following in the form.. Then use CFContent in servecaptcha.cfm to serve the image specified and auto delete it... Neat and tidy with no schedules or need to handle deletion in the form submission either :) Paul ~| Logware: a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191245 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: I wrote a captcha generator
Dawson, Michael wrote: > Very nice. I would suggest that you randomly stagger the vertical > location of the text to make it that much harder to OCR. good idea! Done! =) - Rick ~| Logware: a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191244 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: I wrote a captcha generator
Very nice. I would suggest that you randomly stagger the vertical location of the text to make it that much harder to OCR. -Original Message- From: Rick Root [mailto:[EMAIL PROTECTED] Sent: Thursday, January 20, 2005 12:44 PM To: CF-Talk Subject: I wrote a captcha generator While working on my blog application ( www.webworksllc.com/blogcfm ) I decided I needed some kind of captcha tool to help keep out the spambots. So with the help of a few java font rendering tutorials... I wrote one, and am releasing it under the BSD open-source license. http://www.it.dev.duke.edu/blogcfm/captcha.cfm it's pretty basic so far, but it works. the function generates a 6 character alphanumeric string, and then generates a png image based on that string, and returns the image name and an MD5 hash for the string. You can also put the image name in the form, which would allow you to delete it upon form submission. Alternatively, you could just delete the images it creates with a scheduled task. You include the MD5 hash as a hidden form element. The handling form should convert the user's entry to an MD5 hash, and then compare it to the hidden form field. If they match, SUCCESS! - Rick ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:191243 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
