旋转式验证码

随机生成不同角度的图像，并要求拖动滑块让图像重合验证。

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/rotate"
)

var rotateCapt slide.Captcha

func init() {
  builder := rotate.NewBuilder(rotate.WithRangeAnglePos([]option.RangeVal{
		// {Min: 20, Max: 330},
	}))

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

	// set resources
	builder.SetResources(
		rotate.WithImages(imgs),
	)
	
	rotateCapt = builder.Make()
}

func main() {
	captData, err := rotateCapt.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.GetThumbImage().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.GetThumbImage().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/rotate"
)

var rotateCapt slide.Captcha

func init() {
  builder := rotate.NewBuilder(rotate.WithRangeAnglePos([]option.RangeVal{
		// {Min: 20, Max: 330},
	}))

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

	// set resources
	builder.SetResources(
		rotate.WithImages(imgs),
	)
	
	rotateCapt = builder.Make()
}

func main() {
	captData, err := rotateCapt.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.GetThumbImage().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.GetThumbImage().SaveToFile("./.caches/thumb.png")
	// if err != nil {
	// 	fmt.Println(err)
	// }
}

使用

创建实例

• builder.Make() 旋转式

配置

TIP

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

Options	Desc
rotate.WithImageSquareSize(val int)	设置主图大小，默认 220x220
rotate.WithRangeAnglePos(vals []option.RangeVal)	设置校验随机角度范围
rotate.WithRangeThumbImageSquareSize(val []int)	设置缩略图大小
rotate.WithThumbImageAlpha(val float32)	设置缩略图透明度

设置资源

TIP

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

Options	Desc
rotate.WithBackgrounds([]image.Image)	设置主图图片

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

图像实例

TIP

通过 Generate() 生成的数据，有图像实例 JPEG、PNG 两种格式，分别为 JPEGImageData 和 PNGImageData

JPEGImageData

• Get() image.Image 获取原图像
• ToBytes() ([]byte, error) 转为字节数组
• ToBytesWithQuality(imageQuality int) ([]byte, error) 指定清晰度转为字节数组
• ToBase64() (string, error) 转为 Base64 字符串，带 "data:image/jpeg;base64," 前缀
• ToBase64Data() (string, error) 转为 Base64 字符串
• ToBase64WithQuality(imageQuality int) (string, error) 指定清晰度转为 Base64 字符串，带 "data:image/jpeg;base64," 前缀
• ToBase64DataWithQuality(imageQuality int) (string, error) 指定清晰度转为 Base64 字符串
• SaveToFile(filepath string, quality int) error 保存 JPEG 到文件

PNGImageData

• Get() image.Image 获取原图像
• ToBytes() ([]byte, error) 转为字节数组
• ToBase64() (string, error) 转为 Base64 字符串，带 "data:image/png;base64," 前缀
• ToBase64Data() (string, error) 转为 Base64 字符串
• SaveToFile(filepath string) error 保存 到文件

验证码校验

TIP

ok := rotate.CheckAngle(srcAngle, angle, paddingValue)

Params	Desc
srcAngle	用户交互的角度
angle	验证码校验的角度
paddingValue	控制误差值