Struct CaptchaBuilder 

pub struct CaptchaBuilder { /* private fields */ }

A builder struct for creating a [Captcha].

Implementations

impl CaptchaBuilder

pub fn new() -> Self

Returns a CaptchaBuilder with default configuration.

Examples found in repository

examples/default.rs (line 5)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

pub fn length(self, length: u8) -> Self

Set the length of the verification code string, default is 4.

Examples found in repository

examples/default.rs (line 19)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

pub fn fonts(self, fonts: Font<'static>) -> Self

Set the font used to generate the captcha image, default is arial-rounded-bold.ttf.

pub fn width(self, width: u32) -> Self

Set the width of the verification code image, default is 140.

Examples found in repository

examples/default.rs (line 20)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

pub fn height(self, height: u32) -> Self

Set the height of the verification code image, default is 40.

Examples found in repository

examples/default.rs (line 21)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

pub fn mode(self, mode: u8) -> Self

Set the color mode of the verification code image, default is 1. 0: dark on light, 1: colorful on light, 2: colorful on dark.

Examples found in repository

examples/default.rs (line 22)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

pub fn complexity(self, complexity: u32) -> Self

Set the complexity of the verification code image, default is 5.

Examples found in repository

examples/default.rs (line 23)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

pub fn generate(&self, seed: &[u8], text: Option<String>) -> Captcha

Generate a [Captcha] with the given random seed and a optional text. If the text is not provided, a text will be generated from random seed. The random seed can be used only once. You should use a new seed for each new captcha.

Examples found in repository

examples/default.rs (line 7)

fn main() {
    {
        let builder = CaptchaBuilder::new();

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));

        let captcha = builder.generate(b"random seed 1", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(0));
    }

    {
        // same as default
        let builder = CaptchaBuilder::new()
            .length(4)
            .width(140)
            .height(40)
            .mode(1)
            .complexity(5);

        let captcha = builder.generate(b"random seed 0", None);
        println!("text: {}", captcha.text());
        println!("base_img: {}", captcha.to_base64(30));
    }
}

Trait Implementations

impl Default for CaptchaBuilder

fn default() -> Self

Returns the “default value” for a type.