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README
Apache-2.0

这是一个行为验证码的实现

在线体验

验证码demo移步 tianai-captcha-demo

简单介绍

  • tianai-captcha 目前支持的行为验证码类型
    • 滑块验证码
    • 旋转验证码
    • 滑动还原验证码
    • 文字点选验证码
    • 后面会陆续支持市面上更多好玩的验证码玩法... 敬请期待

快速上手

如果是SpringBoot开发者可直接使用SpringBoot快速启动器tianai-captcha-springboot-starter

1. 导入xml

<!-- maven 导入 -->
<dependency>
    <groupId>cloud.tianai.captcha</groupId>
    <artifactId>tianai-captcha</artifactId>
    <version>1.3.2</version>
</dependency>

2. 使用 ImageCaptchaGenerator生成器生成验证码

package example.readme;

import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
import cloud.tianai.captcha.generator.impl.MultiImageCaptchaGenerator;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;
import cloud.tianai.captcha.validator.ImageCaptchaValidator;
import cloud.tianai.captcha.validator.impl.BasicCaptchaTrackValidator;

import java.util.Map;

public class Test {
    public static void main(String[] args) throws InterruptedException {
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        ImageCaptchaGenerator imageCaptchaGenerator = new MultiImageCaptchaGenerator(imageCaptchaResourceManager).init(true);
        /*
                生成滑块验证码图片, 可选项
                SLIDER (滑块验证码)
                ROTATE (旋转验证码)
                CONCAT (滑动还原验证码)
                WORD_IMAGE_CLICK (文字点选验证码)

                更多验证码支持 详见 cloud.tianai.captcha.common.constant.CaptchaTypeConstant
         */
        ImageCaptchaInfo imageCaptchaInfo = imageCaptchaGenerator.generateCaptchaImage(CaptchaTypeConstant.SLIDER);
        System.out.println(imageCaptchaInfo);

        // 负责计算一些数据存到缓存中，用于校验使用
        // ImageCaptchaValidator负责校验用户滑动滑块是否正确和生成滑块的一些校验数据; 比如滑块到凹槽的百分比值
        ImageCaptchaValidator imageCaptchaValidator = new BasicCaptchaTrackValidator();
        // 这个map数据应该存到缓存中，校验的时候需要用到该数据
        Map<String, Object> map = imageCaptchaValidator.generateImageCaptchaValidData(imageCaptchaInfo);
    }
}

3. 使用ImageCaptchaValidator校验器 验证

package example.readme;

import cloud.tianai.captcha.validator.ImageCaptchaValidator;
import cloud.tianai.captcha.validator.common.model.dto.ImageCaptchaTrack;
import cloud.tianai.captcha.validator.impl.BasicCaptchaTrackValidator;

import java.util.Map;

public class Test2 {
    public static void main(String[] args) {
        ImageCaptchaValidator sliderCaptchaValidator = new BasicCaptchaTrackValidator();

        ImageCaptchaTrack imageCaptchaTrack = null;
        Map<String, Object> map = null;
        Float percentage = null;
        // 用户传来的行为轨迹和进行校验
        // - imageCaptchaTrack为前端传来的滑动轨迹数据
        // - map 为生成验证码时缓存的map数据
        boolean check = sliderCaptchaValidator.valid(imageCaptchaTrack, map);
        // 如果只想校验用户是否滑到指定凹槽即可，也可以使用
        // - 参数1 用户传来的百分比数据
        // - 参数2 生成滑块是真实的百分比数据
        check = sliderCaptchaValidator.checkPercentage(0.2f, percentage);
    }
}

整体架构设计

tianai-captcha 验证码整体分为 生成器(ImageCaptchaGenerator)、校验器(ImageCaptchaValidator)、资源管理器(ImageCaptchaResourceManager) 其中生成器、校验器、资源管理器等都是基于接口模式实现 可插拔的，可以替换为自定义实现，灵活度高

  • 生成器(ImageCaptchaGenerator)
    • 主要负责生成行为验证码所需的图片
  • 校验器(ImageCaptchaValidator)
    • 主要负责校验用户滑动的行为轨迹是否合规
  • 资源管理器(ImageCaptchaResourceManager)
    • 主要负责读取验证码背景图片和模板图片等
    • 资源管理器细分为 资源存储(ResourceStore)、资源提供者(ResourceProvider)
      • 资源存储(ResourceStore) 负责存储背景图和模板图
      • 资源提供者(ResourceProvider) 负责将资源存储器中对应的资源转换为文件流
        • 一般资源存储器中存储的是图片的url地址或者id之类， 资源提供者 就是负责将url或者别的id转换为真正的图片文件

扩展

生成带有混淆滑块的图片

package example.readme;

import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
import cloud.tianai.captcha.generator.impl.MultiImageCaptchaGenerator;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;

public class Test3 {
    public static void main(String[] args) {
        // 资源管理器
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        // 标准验证码生成器
        ImageCaptchaGenerator imageCaptchaGenerator = new MultiImageCaptchaGenerator(imageCaptchaResourceManager).init(true);
        // 生成 具有混淆的 滑块验证码 (目前只有滑块验证码支持混淆滑块， 旋转验证，滑动还原，点选验证 均不支持混淆功能)
        ImageCaptchaInfo imageCaptchaInfo = imageCaptchaGenerator.generateCaptchaImage(GenerateParam.builder()
                .type(CaptchaTypeConstant.SLIDER)
                .sliderFormatName("jpeg")
                .backgroundFormatName("png")
                // 是否添加混淆滑块
                .obfuscate(true)
                .build());
    }
}

生成webp格式的滑块图片

package example.readme;

import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
import cloud.tianai.captcha.generator.impl.MultiImageCaptchaGenerator;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;

public class Test4 {
    public static void main(String[] args) {
        // 资源管理器
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        // 标准验证码生成器
        ImageCaptchaGenerator imageCaptchaGenerator = new MultiImageCaptchaGenerator(imageCaptchaResourceManager).init(true);
        // 生成旋转验证码 图片类型为 webp
        // 注意 tianai-captcha-1.3.2 后面默认删除了生成webp格式图片需要用户自定义添加webp转换的工具，需要用户自定义添加和扩展
        // 参考 https://bitbucket.org/luciad/webp-imageio
        ImageCaptchaInfo slideImageInfo = imageCaptchaGenerator.generateCaptchaImage(GenerateParam.builder()
                .type(CaptchaTypeConstant.ROTATE)
                .sliderFormatName("webp")
                .backgroundFormatName("webp")
                .build());
        System.out.println(slideImageInfo);
    }
}

添加自定义图片资源

  • 自定义图片资源大小为 590*360 格式为jpg
package example.readme;

import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.ResourceStore;
import cloud.tianai.captcha.resource.common.model.dto.Resource;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.provider.ClassPathResourceProvider;
import cloud.tianai.captcha.resource.impl.provider.URLResourceProvider;

public class Test5 {
    public static void main(String[] args) {
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        // 通过资源管理器或者资源存储器
        ResourceStore resourceStore = imageCaptchaResourceManager.getResourceStore();
        // 添加classpath目录下的 aa.jpg 图片
        resourceStore.addResource(CaptchaTypeConstant.SLIDER, new Resource(ClassPathResourceProvider.NAME, "/aa.jpg"));
        // 添加远程url图片资源
        resourceStore.addResource(CaptchaTypeConstant.SLIDER,new Resource(URLResourceProvider.NAME, "http://www.xx.com/aa.jpg"));
        // 内置了通过url 和 classpath读取图片资源，如果想扩展可实现 ResourceProvider 接口，进行自定义扩展
    }
}

添加自定义模板资源

  • 系统内置了2套模板，可以到QQ群:1021884609 文件中获取更多模板或者自己制作模板
  • 模板图片格式
    • 滑块验证码
      • 滑块大小为 110*110 格式为png
      • 凹槽大小为 110*110 格式为png
      • 模板大小为 110*360 格式为png，该图为固定格式，是一张纯透明图片
    • 旋转验证码
      • 滑块大小为 200*200 格式为png
      • 凹槽大小为 200*200 格式为png
      • 模板大小为 360*360 格式为png，该图为固定格式，是一张纯透明图片
package example.readme;

import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
import cloud.tianai.captcha.generator.common.constant.SliderCaptchaConstant;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.ResourceStore;
import cloud.tianai.captcha.resource.common.model.dto.Resource;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.provider.ClassPathResourceProvider;

import java.util.HashMap;
import java.util.Map;

public class Test6 {
    public static void main(String[] args) {
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        // 通过资源管理器或者资源存储器
        ResourceStore resourceStore = imageCaptchaResourceManager.getResourceStore();
        // 添加滑块验证码模板.模板图片由三张图片组成
        Map<String, Resource> template1 = new HashMap<>(4);
        template1.put(SliderCaptchaConstant.TEMPLATE_ACTIVE_IMAGE_NAME, new Resource(ClassPathResourceProvider.NAME, "/active.png"));
        template1.put(SliderCaptchaConstant.TEMPLATE_FIXED_IMAGE_NAME, new Resource(ClassPathResourceProvider.NAME, "/fixed.png"));
        template1.put(SliderCaptchaConstant.TEMPLATE_MATRIX_IMAGE_NAME, new Resource(ClassPathResourceProvider.NAME, "/matrix.png"));
        resourceStore.addTemplate(CaptchaTypeConstant.SLIDER,template1);
        // 模板与三张图片组成 滑块、凹槽、背景图 
        // 同样默认支持 classpath 和 url 两种获取图片资源， 如果想扩展可实现 ResourceProvider 接口，进行自定义扩展
    }
}
  • 清除内置的图片资源和模板资源
package example.readme;

import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
import cloud.tianai.captcha.generator.impl.MultiImageCaptchaGenerator;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;

public class Test6 {
   public static void main(String[] args) {
       ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
       //为方便快速上手 系统本身自带了一张图片和两套滑块模板，如果不想用系统自带的可以不让它加载系统自带的
       // 第二个构造参数设置为false时将不加载默认的图片和模板
       ImageCaptchaGenerator imageCaptchaGenerator = new MultiImageCaptchaGenerator(imageCaptchaResourceManager).init(false);
   }
}

自定义 imageCaptchaValidator 校验器

// 该接口负责对用户滑动验证码后传回的数据进行校验，比如滑块是否滑到指定位置，滑块行为轨迹是否正常等等
// 该接口的默认实现有 
// SimpleImageCaptchaValidator 校验用户是否滑到了指定缺口处
// BasicCaptchaTrackValidator 是对 SimpleImageCaptchaValidator增强
// BasicCaptchaTrackValidator是对SimpleImageCaptchaValidator的增强 对滑动轨迹进行了简单的验证
// 友情提示 因为BasicCaptchaTrackValidator 里面校验滑动轨迹的算法已经开源，有强制要求的建议重写该接口的方法，避免被破解

自定义 ResourceProvider 实现自定义文件读取策略， 比如 oss之类的

package example.readme;

import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
import cloud.tianai.captcha.generator.impl.MultiImageCaptchaGenerator;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.ResourceProvider;
import cloud.tianai.captcha.resource.common.model.dto.Resource;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;

import java.io.InputStream;

public class Test7 {
    public static void main(String[] args) {
        // 自定义 ResourceProvider
        ResourceProvider resourceProvider = new ResourceProvider() {
            @Override
            public InputStream getResourceInputStream(Resource data) {
                return null;
            }

            @Override
            public boolean supported(String type) {
                return false;
            }

            @Override
            public String getName() {
                return null;
            }
        };
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        ImageCaptchaGenerator imageCaptchaGenerator = new MultiImageCaptchaGenerator(imageCaptchaResourceManager).init(false);
        // 注册
        imageCaptchaResourceManager.registerResourceProvider(resourceProvider);
    }
}

扩展，对StandardImageCaptchaGenerator增加了缓存模块

由于实时生成滑块图片可能会有一点性能影响，内部基于StandardSliderCaptchaGenerator进行了提前缓存生成好的图片，CacheSliderCaptchaGenerator 这只是基本的缓存逻辑，比较简单，用户可以定义一些更加有意思的扩展，用于突破性能瓶颈

package example.readme;

import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
import cloud.tianai.captcha.generator.impl.CacheImageCaptchaGenerator;
import cloud.tianai.captcha.generator.impl.MultiImageCaptchaGenerator;
import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
import cloud.tianai.captcha.resource.impl.DefaultImageCaptchaResourceManager;

public class Test8 {
    public static void main(String[] args) throws InterruptedException {
        // 使用 CacheSliderCaptchaGenerator 对滑块验证码进行缓存，使其提前生成滑块图片
        // 参数一: 真正实现 滑块的 SliderCaptchaGenerator
        // 参数二: 默认提前缓存多少个
        // 参数三: 出错后 等待xx时间再进行生成
        // 参数四: 检查时间间隔
        ImageCaptchaResourceManager imageCaptchaResourceManager = new DefaultImageCaptchaResourceManager();
        ImageCaptchaGenerator imageCaptchaGenerator = new CacheImageCaptchaGenerator(new MultiImageCaptchaGenerator(imageCaptchaResourceManager), 10, 1000, 100);
        imageCaptchaGenerator.init(true);
        // 生成滑块图片
        ImageCaptchaInfo slideImageInfo = imageCaptchaGenerator.generateCaptchaImage(CaptchaTypeConstant.SLIDER);
        // 获取背景图片的base64
        String backgroundImage = slideImageInfo.getBackgroundImage();
        // 获取滑块图片
        String sliderImage = slideImageInfo.getSliderImage();
        System.out.println(slideImageInfo);
    }
}

qq群: 1021884609

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一个低调的行为验证码 [滑块验证码、点选验证码、行为验证码、旋转验证码， 滑动验证码] 展开 收起
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