滑动式验证码

随机生成贴图滑块，并要求拖动滑块让贴图重合验证。

安装

$ go get -u github.com/wenlng/go-captcha/v2@latest

$ go get -u github.com/wenlng/go-captcha/v2@latest

安装预置内嵌素材资源

$ go get -u github.com/wenlng/go-captcha-assets@latest

$ go get -u github.com/wenlng/go-captcha-assets@latest

实例

package main

import (
	"encoding/json"
	"fmt"
	"log"

	"github.com/golang/freetype/truetype"
	"github.com/wenlng/go-captcha-assets/resources/images_v2"
	"github.com/wenlng/go-captcha-assets/resources/tiles"
	"github.com/wenlng/go-captcha/v2/base/option"
	"github.com/wenlng/go-captcha/v2/slide"
)

var slideCapt slide.Captcha

func init() {
  builder := slide.NewBuilder(
		// slide.WithGenGraphNumber(2),
		// slide.WithEnableGraphVerticalRandom(true),
	)

	// background images
	imgs, err := images.GetImages()
	if err != nil {
		log.Fatalln(err)
	}

	graphs, err := tiles.GetTiles()
	if err != nil {
		log.Fatalln(err)
	}

	var newGraphs = make([]*slide.GraphImage, 0, len(graphs))
	for i := 0; i < len(graphs); i++ {
		graph := graphs[i]
		newGraphs = append(newGraphs, &slide.GraphImage{
			OverlayImage: graph.OverlayImage,
			MaskImage:    graph.MaskImage,
			ShadowImage:  graph.ShadowImage,
		})
	}

	// set resources
	builder.SetResources(
		slide.WithGraphImages(newGraphs),
		slide.WithBackgrounds(imgs),
	)
	
	slideCapt = builder.Make()
}

func main() {
	captData, err := slideCapt.Generate()
	if err != nil {
		log.Fatalln(err)
	}

	dotData := captData.GetData()
	if dotData == nil {
		log.Fatalln(">>>>> generate err")
	}

	dots, _ := json.Marshal(dotData)
	fmt.Println(">>>>> ", string(dots))

	var mBase64, tBase64 string
	mBase64, err = captData.GetMasterImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}
	tBase64, err = captData.GetTileImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}

	fmt.Println(">>>>> ", mBase64)
	fmt.Println(">>>>> ", tBase64)
	
	// err = captData.GetMasterImage().SaveToFile("./.caches/master.jpg", option.QualityNone)
	// if err != nil {
	// 	fmt.Println(err)
	// }
	// err = captData.GetTileImage().SaveToFile("./.caches/thumb.png")
	// if err != nil {
	// 	fmt.Println(err)
	// }
}

package main

import (
	"encoding/json"
	"fmt"
	"log"

	"github.com/golang/freetype/truetype"
	"github.com/wenlng/go-captcha-assets/resources/images_v2"
	"github.com/wenlng/go-captcha-assets/resources/tiles"
	"github.com/wenlng/go-captcha/v2/base/option"
	"github.com/wenlng/go-captcha/v2/slide"
)

var slideCapt slide.Captcha

func init() {
  builder := slide.NewBuilder(
		// slide.WithGenGraphNumber(2),
		// slide.WithEnableGraphVerticalRandom(true),
	)

	// background images
	imgs, err := images.GetImages()
	if err != nil {
		log.Fatalln(err)
	}

	graphs, err := tiles.GetTiles()
	if err != nil {
		log.Fatalln(err)
	}

	var newGraphs = make([]*slide.GraphImage, 0, len(graphs))
	for i := 0; i < len(graphs); i++ {
		graph := graphs[i]
		newGraphs = append(newGraphs, &slide.GraphImage{
			OverlayImage: graph.OverlayImage,
			MaskImage:    graph.MaskImage,
			ShadowImage:  graph.ShadowImage,
		})
	}

	// set resources
	builder.SetResources(
		slide.WithGraphImages(newGraphs),
		slide.WithBackgrounds(imgs),
	)
	
	slideCapt = builder.Make()
}

func main() {
	captData, err := slideCapt.Generate()
	if err != nil {
		log.Fatalln(err)
	}

	dotData := captData.GetData()
	if dotData == nil {
		log.Fatalln(">>>>> generate err")
	}

	dots, _ := json.Marshal(dotData)
	fmt.Println(">>>>> ", string(dots))

	var mBase64, tBase64 string
	mBase64, err = captData.GetMasterImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}
	tBase64, err = captData.GetTileImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}

	fmt.Println(">>>>> ", mBase64)
	fmt.Println(">>>>> ", tBase64)
	
	// err = captData.GetMasterImage().SaveToFile("./.caches/master.jpg", option.QualityNone)
	// if err != nil {
	// 	fmt.Println(err)
	// }
	// err = captData.GetTileImage().SaveToFile("./.caches/thumb.png")
	// if err != nil {
	// 	fmt.Println(err)
	// }
}

使用

创建实例

• builder.Make() 滑动式
• builder.MakeWithRegion() 区域内拖拽滑动式

配置

TIP

配置举例：slide.NewBuilder(slide.WithXxxx(), slide.WithXxxx(), ....) 或 builder.SetOptions(slide.WithXxxx(), slide.WithXxxx(), ....)

Options	Desc
slide.WithImageSize(*option.Size)	设置主图尺寸，默认 300x220
slide.WithImageAlpha(float32)	设置主图透明度
slide.WithRangeGraphSize(val option.RangeVal)	设置图形随机尺寸范围
slide.WithRangeGraphAnglePos([]option.RangeVal)	设置图形随机角度范围
slide.WithGenGraphNumber(val int)	设置图形个数
slide.WithEnableGraphVerticalRandom(val bool)	设置图形水平方向是否随机排序
slide.WithRangeDeadZoneDirections(val []DeadZoneDirectionType)	设置贴图盲区

设置资源

TIP

配置举例：builder.SetResources(slide.WithXxxx(), slide.WithXxxx(), ....)

Options	Desc
slide.WithBackgrounds([]image.Image)	设置主图背景
slide.WithGraphImages(images []*GraphImage)	设置贴图的图形

验证码数据

TIP

captData, err := capt.Generate()

Method	Desc
GetData() *Block	获取当前校验的信息
GetMasterImage() imagedata.JPEGImageData	获取主图
GetTileImage() imagedata.PNGImageData	获取缩略图

关于验证码 "imagedata" API可参考 验证码图像。

验证码校验

TIP

ok := slide.CheckPoint(srcX, srcY, X, Y, paddingValue)

Params	Desc
srcX	用户交互的 X 值
srcY	用户交互的 Y 值
X	验证码校验的 X 值
Y	验证码校验的 Y 值
paddingValue	控制误差值

拖拽式预览