Crate captcha [−] [src]
Crate to generate CAPTCHAs.
For a more detailed list of predefined CAPTCHAS please have a look at by_name
.
The crate offers two ways to create CAPTCHAs. The first way is the most easiest one. Just one
line of code is necessary to create a random CAPTCHA in of a given category. The category can be
either Easy
, Medium
or Hard
. The size of the CAPTCHA is 220x120 pixels and the number of
characters is randomly selected between 4 and 6 letters (inclusive).
use captcha::{gen, Difficulty}; gen(Difficulty::Easy).as_png();
To be more flexible you can build CAPTCHAs manually as well.
use captcha::Captcha; use captcha::filters::{Noise, Wave, Dots}; Captcha::new() .add_chars(5) .apply_filter(Noise::new(0.4)) .apply_filter(Wave::new(2.0, 20.0).horizontal()) .apply_filter(Wave::new(2.0, 20.0).vertical()) .view(220, 120) .apply_filter(Dots::new(15)) .as_png();
Modules
filters |
Filters to disturb and transform CAPTCHAs. |
Structs
Captcha |
Used to build a CAPTCHA step by step. |
Geometry |
Represents the area which contains text in a CAPTCHA. |
Enums
CaptchaName |
Names of predefined CAPTCHAs. |
Difficulty |
The difficulty of a CAPTCHA. |
Functions
by_name |
Creates a predefined CAPTCHA by its name. |
gen |
Creates a random CAPTCHA with the given difficulty. |