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Captcha Implementation
Captcha Implementation in Spring boot.
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Join For FreeCAPTCHA helps protect you from spam and password decryption by asking you to complete a simple test that proves you are human and not a computer trying to break into a password-protected account.
We can implement a captcha in Spring boot where a user can get an encoded image, and the corresponding readable captcha can be stored in the Database.
We can add simplecaptcha in the pom file to include inside the dependencies.
<dependency>
<groupId>cn.apiclub.tool</groupId>
<artifactId>simplecaptcha</artifactId>
<!-- we have to manage version here -->
<version>1.2.2</version>
</dependency>We can create the captcha by providing the height and width for the same and inside the create captcha we can add the text, background-color, and gimp as well like FishEyeGimpyRenderer
Captcha captcha = createCaptcha(240, 70);
String readableImage = encodeCaptcha(captcha);public static Captcha createCaptcha(Integer width, Integer height) {
return new Captcha.Builder(width, height).addBackground(new GradiatedBackgroundProducer())
.addText(new DefaultTextProducer(6, DEFAULT_CHARS), new DefaultWordRenderer()).gimp(new FishEyeGimpyRenderer()).addNoise()
.build();
}We can also use encode Captcha method by passing the encoded captcha to Base64, getEncoder method
public static String encodeCaptcha(Captcha captcha) {
String image = null;
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ImageIO.write(captcha.getImage(), "jpg", bos);
byte[] byteArray = Base64.getEncoder().encode(bos.toByteArray());
image = new String(byteArray);
} catch (Exception e) {
System.out.println(e.toString());
}
return image;
}When we have the readable captcha, we can store it in DB or cache to validate whether the user has used the correct captcha or not.
Happy Coding!
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Compliance Automated Standard Solution (COMPASS), Part 10: How OSCAL Mapping Paves the Way for Continuous Compliance Scalability
-
GenAI Implementation Isn't Magic — It’s a Lifecycle
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-
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